ASPxClientWebDocumentViewer Class

A client-side equivalent of the ASPxWebDocumentViewer class.

Declaration

declare class ASPxClientWebDocumentViewer extends ASPxClientControl

Methods

Cast(obj) Method

Converts the specified object to the current object's type. This method is effective when you utilize the Client API IntelliSense feature provided by DevExpress.

Declaration

static Cast(
    obj: any
): ASPxClientWebDocumentViewer

Parameters

Name Type Description
obj any

The client object to be type cast. Represents an instance of a DevExpress web control's client object.

Returns

Type Description
ASPxClientWebDocumentViewer

An ASPxClientWebDocumentViewer object.

Remarks

The Cast method is implemented as a part of the JavaScript IntelliSense support for DevExpress ASP.NET controls and MVC extensions. So, using the Cast method is sensible when you intend to use IntelliSense during writing JavaScript code at design time with the help of the DevExpress client API.

A call to the Cast method (which is a static method) casts the specified client object to the ASPxClientWebDocumentViewer type. As a result, the object's type is now known and ASPxClientWebDocumentViewer type specific IntelliSense information can be displayed for this client object, facilitating your coding.

The examples of this method application are as follows.

  • Converting the event source object passed to a client event's handler:

    ...
    <ClientSideEvents Init="function(s, e) { 
        var clientObject = ASPxClientWebDocumentViewer.Cast(s);
    }" />
    
  • Converting a client object accessed by using the value of the ClientInstanceName (or ID) property. For instance, if a web control's ClientInstanceName property is set to 'ASPxClientWebDocumentViewer1', the object can be type cast in the following manner:

    ...
    var clientObject = ASPxClientWebDocumentViewer.Cast('ASPxClientWebDocumentViewer1');
    

Close Method

Closes the document that is currently open in the Web Document Viewer.

Declaration

Close(): void

Remarks

The Close method closes the displayed document and leaves the Document Viewer empty.

For a code sample, refer to the following help topic: ASPxClientWebDocumentViewer.OpenReport(url).

DrillThrough(customData) Method

Enables navigation between drill-through reports on the client-side.

Declaration

DrillThrough(
    customData: string
): JQueryPromise<any>

Parameters

Name Type Description
customData string

Provides access to custom client data associated with a currently previewed report.

Returns

Type Description
JQueryPromise<any>

A Deferred Promise object.

Remarks

Use this method to provide drill-through functionality to web reports. The customData parameter specifies the navigation logic.

To process mouse events related to report elements on the client, handle the client-side ASPxClientWebDocumentViewer.PreviewClick event.

On the server-side, implement the IWebDocumentViewerDrillThroughProcessor interface and register it by calling the DefaultWebDocumentViewerContainer.RegisterWebDocumentViewerDrillThroughProcessor<T> method at the application startup.

For a code sample, see How to provide drill-through functionality to web reports.

ExportTo Method

Exports the document to the specified file format.

Declaration

ExportTo(
    format?: string,
    inlineResult?: boolean
): void

Parameters

Name Type Description
format string

A string value that specifies the export format. The DevExpress.Reporting.Viewer.ExportFormatID enumeration lists supported formats.

inlineResult boolean

true, to inform the browser to display a file instead of download; otherwise, false.

Remarks

The method performs a callback that exports a document to the specified format and sends the resulting file to the client browser.

The first method's parameter is the DevExpress.Reporting.Viewer.ExportFormatID value. The second parameter (inlineResult) determines whether the browser attempts to display the exported document or the browser downloads the file. If the inlineResult parameter is set to true, but the browser does not handle the specified format, the resulting file is downloaded.

TIP

Handle the CustomizeExportOptions event to specify export options.

The Web Document Viewer can export a document asynchronously (export operations are run in the background). To switch to the asynchronous export mode, set the AsyncExportApproach to true. Asynchronous export action opens a new page with a progress indicator.

The code snippet below demonstrates how to hide the Export Options panel, add a button to export the report to a file in XLSX format, and specify the export options.

Client-Side ExportTo Method

The following code snippet demonstrates how to remove the Export command in the Document Viewer UI, add a button to export the report to a file in XLSX format, and specify the SingleFilePageByPage export mode:

<asp:Content ID="Content" ContentPlaceHolderID="MainContent" runat="server">
    <script type="text/javascript">
        function ExportOnClick(s, e) {
            WebDocumentViewer1.ExportTo('xlsx');
        }
        function ConfigureExportOptions(s, e) {
            e.HideExportOptionsPanel();
            var model = e.GetExportOptionsModel(DevExpress.Reporting.Viewer.ExportFormatID.XLS);
            model.xlsExportMode('SingleFilePageByPage');
        }
</script>
    <dx:ASPxButton ID="ASPxButton1" runat="server" Text="ASPxButton" AutoPostBack="False">
        <ClientSideEvents Click="ExportOnClick" />
    </dx:ASPxButton>
<dx:ASPxWebDocumentViewer ClientInstanceName="WebDocumentViewer1" ID="ASPxWebDocumentViewer1" runat="server">
    <ClientSideEvents CustomizeExportOptions = "ConfigureExportOptions" />
</dx:ASPxWebDocumentViewer>
</asp:Content>

GetCurrentPageIndex Method

Returns the current page's zero-based index.

Declaration

GetCurrentPageIndex(): number

Returns

Type Description
number

A zero-based integer value that specifies the index of a current page.

Remarks

The code snippet below demonstrates how to use the ASPxClientWebDocumentViewer.DocumentReady event to navigate through pages of a ready document. To obtain the current page number and navigate to the next page, use the GetCurrentPageIndex and ASPxClientWebDocumentViewer.GoToPage methods.

<script type="text/javascript" id="script">
    function documentReady(s, e) {
        var goToNextPage = function () {
            var pageIndex = s.GetCurrentPageIndex();
            if (e.PageCount <= pageIndex)
                return;
            s.GoToPage(pageIndex + 1);
            setTimeout(function () { goToNextPage(); }, 3000);
        }
        goToNextPage();
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
     <ClientSideEvents DocumentReady="documentReady"/>
</dx:ASPxWebDocumentViewer>
See Also

GetParametersModel Method

Provide access to the report parameters' client-side model.

Declaration

GetParametersModel(): DevExpress.Reporting.Viewer.Parameters.PreviewParametersViewModel

Returns

Type Description
PreviewParametersViewModel

An object that specifies the report parameters model.

Remarks

The model returned by the GetParametersModel method provides access to all available report parameters and allows you to provide their values on the client side, as illustrated below:

var parameterValue = 1;
ASPxWebDocumentViewer1.GetParametersModel()["parameter1"](parameterValue);

GetPreviewModel Method

Provides access to the Document Viewer's client-side model.

Declaration

GetPreviewModel(): DevExpress.Reporting.Viewer.Utils.IPreviewModel

Returns

Type Description
IPreviewModel

An object that specifies the client-side preview model.

Remarks

Call the GetPreviewModel method to obtain the Document Viewer's client-side model and perform the required actions with the Document Viewer UI and the current document.

The code sample below demonstrates how to automatically collapse the Parameters panel after resetting parameter values in the ASPxClientWebDocumentViewer.ParametersReset event handler.

<script type="text/javascript" id="script">
    function parametersReset(s, e) {
        var preview = s.GetPreviewModel();
        if (preview) {
            preview.tabPanel.collapsed(true);
        }
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
    <ClientSideEvents ParametersReset ="parametersReset"/>
</dx:ASPxWebDocumentViewer>

GetReportPreview Method

Provides access to the report preview.

Declaration

GetReportPreview(): DevExpress.Reporting.Viewer.ReportPreview

Returns

Type Description
ReportPreview

An object that specifies the report preview.

Remarks

The following code snippet demonstrates how to zoom a previewed document.

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="DXWebApplication1.XtraReport1">
    <ClientSideEvents Init="function(s, e) { s.GetReportPreview().zoom(0.9); }"/>
</dx:ASPxWebDocumentViewer>

GoToPage(pageIndex) Method

Displays the report page with the specified page index.

Declaration

GoToPage(
    pageIndex: number
): void

Parameters

Name Type Description
pageIndex number

A zero-based integer value that specifies the index of a page to be displayed.

Remarks

The code snippet below demonstrates how to use the ASPxClientWebDocumentViewer.DocumentReady event to navigate through pages of a ready document. To obtain the current page number and navigate to the next page, use the ASPxClientWebDocumentViewer.GetCurrentPageIndex and GoToPage methods.

<script type="text/javascript" id="script">
    function documentReady(s, e) {
        var goToNextPage = function () {
            var pageIndex = s.GetCurrentPageIndex();
            if (e.PageCount <= pageIndex)
                return;
            s.GoToPage(pageIndex + 1);
            setTimeout(function () { goToNextPage(); }, 3000);
        }
        goToNextPage();
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
     <ClientSideEvents DocumentReady="documentReady"/>
</dx:ASPxWebDocumentViewer>
See Also

OpenReport(url) Method

Opens the specified report on the Web Document Viewer's client side. Allows you to refresh preview for the loaded report.

Declaration

OpenReport(
    url: string
): JQueryPromise<any>

Parameters

Name Type Description
url string

A string that specifies the report's URL.

Returns

Type Description
JQueryPromise<any>

A Deferred Promise object.

Remarks

The client-side OpenReport method uses a web report storage to resolve the report identifier passed as the method parameter. The web report storage is a ReportStorageWebExtension class descendant that returns a report instance on demand.

TIP

You can call the OpenReport method to update the displayed report.

The following code creates a button that loads a report with the "XtraReport1" identifier:

<asp:Content ID="Content" ContentPlaceHolderID="MainContent" runat="server">
    <script type="text/javascript">
        function OnClick(s, e) {
            WebDocumentViewer1.OpenReport("XtraReport1");
        }
    </script>
    <dx:ASPxButton ID="ASPxButton1" runat="server" Text="Open Report" AutoPostBack="False">
        <ClientSideEvents Click="OnClick" />
    </dx:ASPxButton>
    <dx:ASPxWebDocumentViewer ClientInstanceName="WebDocumentViewer1" ID="ASPxWebDocumentViewer1" runat="server">
    </dx:ASPxWebDocumentViewer>
</asp:Content>

PerformCustomDocumentOperation Method

Performs a custom operation with a currently opened document on the client-side.

Declaration

PerformCustomDocumentOperation(
    customData?: string,
    hideMessageFromUser?: boolean
): JQueryPromise<DevExpress.Reporting.Viewer.Utils.IDocumentOperationResult>

Parameters

Name Type Description
customData string

Provides access to custom client data associated with a target document operation.

hideMessageFromUser boolean

true, to hide a message with the operation result from a user; otherwise, false.

Returns

Type Description
JQueryPromise<IDocumentOperationResult>

A Deferred Promise object.

Remarks

Call the PerformCustomDocumentOperation method on the client side to perform the required operation with the current report document. The customData parameter contains data associated with a target operation.

On the sever side, create a DocumentOperationService class descendant and override its DocumentOperationService.CanPerformOperation and DocumentOperationService.PerformOperation methods. To register your custom class, use the DefaultWebDocumentViewerContainer.Register<T, TImpl> method at the application startup.

For a code sample, refer to Web Document Viewer - How to send a report via Email from the client side.

Print Method

Prints the entire document or the specified page.

Declaration

Print(
    pageIndex?: number
): void

Parameters

Name Type Description
pageIndex number

An index of the page to be printed. If the page index is not specified, the entire document is printed.

Remarks

The method renders the report in PDF server side and returns PDF data to the Document Viewer, which then passes them to the browser. If the PDF plug-in is installed, the Print dialog displays the following:

If the PDF plug-in is unavailable, the Document Viewer exports the report document to a PDF file, and initiates the download instead of printing. The resulting PDF file contains a script that starts printing when the PDF viewer opens the file.

The following code demonstrates how to create a button that prints the Document Viewer's report:

<asp:Content ID="Content" ContentPlaceHolderID="MainContent" runat="server">
    <script type="text/javascript">
        function PrintOnClick(s, e) {
            WebDocumentViewer1.Print();
        }
</script>

<dx:ASPxButton ID="ASPxButton1" runat="server" Text="Print Document" AutoPostBack="False">
    <ClientSideEvents Click="PrintOnClick" />
</dx:ASPxButton>
<dx:ASPxWebDocumentViewer ClientInstanceName="WebDocumentViewer1" ID="ASPxWebDocumentViewer1" runat="server">
</dx:ASPxWebDocumentViewer>
</asp:Content>

ResetParameters Method

Resets the report parameter values to the default values.

Declaration

ResetParameters(): void

Remarks

The method restores the default report parameter values and raises the ASPxClientWebDocumentViewer.ParametersReset event.

The following code creates a button that resets the report parameters. The ParametersReset event handler displays the parameter name and value.

<asp:Content ID="Content" ContentPlaceHolderID="MainContent" runat="server">
<script type="text/javascript">
    function btnOnClick(s, e) {
        WebDocumentViewer1.ResetParameters();
    }
    function onParametersReset(s, e) {
        alert("Parameter " + e.Parameters[0].path + " is reset to " + e.Parameters[0].value());
    }
</script>

<dx:ASPxButton ID="ASPxButton1" runat="server" Text="TEST" AutoPostBack="False">
  <ClientSideEvents Click="btnOnClick" />
</dx:ASPxButton>
<dx:ASPxWebDocumentViewer ClientInstanceName="WebDocumentViewer1" ID="ASPxWebDocumentViewer1" runat="server">
  <ClientSideEvents ParametersReset="onParametersReset"/>
</dx:ASPxWebDocumentViewer>
</asp:Content>
See Also

StartBuild Method

Starts building a report document.

Declaration

StartBuild(): void

Remarks

The following code creates a button that passes a parameter to the report and rebuilds the document. When the document is created, the Document Viewer navigates to the last page.

<asp:Content ID="Content" ContentPlaceHolderID="MainContent" runat="server">
    <script type="text/javascript">
        function BuildOnClick(s, e) {
            var parameterValue = 1;
            WebDocumentViewer1.GetParametersModel()["parameter1"](parameterValue);
            WebDocumentViewer1.StartBuild();
        }
        function GoToLastPage(s, e) {
            s.GoToPage(e.PageCount - 1);
        }
    </script>
    <dx:ASPxButton ID="ASPxButton1" runat="server" Text="Print Document" AutoPostBack="False">
        <ClientSideEvents Click="BuildOnClick" />
    </dx:ASPxButton>
    <dx:ASPxWebDocumentViewer ClientInstanceName="WebDocumentViewer1" ID="ASPxWebDocumentViewer1" runat="server">
    </dx:ASPxWebDocumentViewer>
</asp:Content>

UpdateLocalization(localization) Method

Substitutes the specified localizable strings with translations.

Declaration

UpdateLocalization(localization: { [key: string]: string; }): void

Parameters

Name Type Description
localization {[key: string]: string}

A dictionary that contains localizable strings and translations.

Remarks

NOTE

The complete sample project How to Localize the Web Report Designer and Document Viewer Controls is available in the DevExpress Examples repository.

Use the UpdateLocalization method in the client-side ASPxClientWebDocumentViewer.CustomizeLocalization event handler to substitute a particular localization string with the specified text.

TIP

You can use the satellite resource assemblies to translate text strings and then adjust the translation by handling the CustomizeLocalization event.

<script type="text/javascript" id="script"> 
    function customizeLocalization(s) {
        s.UpdateLocalization({
            'Search': 'Suche',
            'Search result': 'Suchergebnisse',
            'Next Page' : 'Nächste Seite',
            'Export Options' : 'Exportoptionen'
        });
    }
</script> 

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server">
    <ClientSideEvents CustomizeLocalization="customizeLocalization"/>
</dx:ASPxWebDocumentViewer>
IMPORTANT

Localization strings are case sensitive. A string is translated if you use correct case to specify it.

On a web page localized string values may be capitalized in a different manner. E.g. the 'Search result' string is displayed as 'SEARCH RESULT'.

To determine the localized string whose value you wish to change, look for the UI element with the browser's Developer Tools, as illustrated in the following picture:

web-viewer-localization-browser-inspect

See Also

Events

BeforeRender Event

Occurs before the Web Document Viewer UI is initialized.

Declaration

BeforeRender: ASPxClientEvent<ASPxClientWebDocumentViewerBeforeRenderEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The BeforeRender event's data class is ASPxClientWebDocumentViewerRenderModelEventArgs.

Remarks

Handle the BeforeRender event to perform required actions before the Web Document Viewer's UI initialization.

The following code snippet demonstrates how to use this event to enable the multi-page mode.

<script type="text/javascript" id="script">
     function BeforeRender(s, e) {
         e.reportPreview.showMultipagePreview(true);
     }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
     <ClientSideEvents BeforeRender="BeforeRender"/>
</dx:ASPxWebDocumentViewer>

CustomizeElements Event

Allows you to customize the Web Document Viewer's UI elements.

Declaration

CustomizeElements: ASPxClientEvent<ASPxClientWebDocumentViewerCustomizeElementsEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The CustomizeElements event's data class is ASPxClientCustomizeElementsEventArgs. The following properties provide information specific to this event:

Property Description
Elements Provides access to the collection of UI elements.

The event data class exposes the following methods:

Method Description
GetById(templateId) Returns UI elements with the specified ID.

Remarks

The event argument provides access to the ASPxClientCustomizeElementsEventArgs.Elements collection containing all available elements of the Web Document Viewer.

To get access to an element, call the ASPxClientCustomizeElementsEventArgs.GetById method with the PreviewElements enumeration value as a parameter.

The code sample below demonstrates how to use the CustomizeElements event to hide the Document Viewer Toolbar.

<script type="text/javascript" id="script">
    function customizeElements(s, e) {
        var toolbarPart = e.GetById(DevExpress.Reporting.Viewer.PreviewElements.Toolbar);
        var index = e.Elements.indexOf(toolbarPart);
        e.Elements.splice(index, 1);
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
     <ClientSideEvents CustomizeElements="customizeElements"/>
</dx:ASPxWebDocumentViewer>

CustomizeExportOptions Event

Allows you to hide export formats and specify the default export options.

Declaration

CustomizeExportOptions: ASPxClientEvent<ASPxClientWebDocumentViewerCustomizeExportOptionsEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The CustomizeExportOptions event's data class is ASPxClientCustomizeExportOptionsEventArgs.

The event data class exposes the following methods:

Method Description
GetExportOptionsModel(format) Returns the export options model for the specified export format.
HideExportOptionsPanel Hides the Export Options panel in the Web Document Viewer.
HideFormat(format) Removes the specified export format from the Export To drop-down list and from the Export Options panel.
HideProperties(format, properties) Hides the specified options for the designated export format from the Export Options panel in the Document Viewer.

Remarks

The event argument has the following methods:

  • HideExportOptionsPanel - Hides the Export Options panel.

    function customizeExportOptions(s, e) {
        e.HideExportOptionsPanel();
    }
    
  • HideFormat - Hides the specified export format from the Export To drop-down list and also hides the related category from the Export Options panel.

    function customizeExportOptions(s, e) {
        e.HideFormat(DevExpress.Reporting.Viewer.ExportFormatID.XLS); 
    }
    
  • HideProperties - Hides the specified options for the export format in the Export Options panel. To remove all options for a particular export format, specify only the first method parameter.

    function customizeExportOptions(s, e) {            
        e.HideProperties(DevExpress.Reporting.Viewer.ExportFormatID.XLS, "ExportMode", "PageRange");
        e.HideProperties(DevExpress.Reporting.Viewer.ExportFormatID.XLSX);
    }
    
  • GetExportOptionsModel - Returns the export options model for the specified export format. Use this model to change the option's default value.

    function customizeExportOptions(s, e) {     
        var model = e.GetExportOptionsModel(DevExpress.Reporting.Viewer.ExportFormatID.XLS);
        model.exportHyperlinks(false);
    }
    
<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server">
    <ClientSideEvents CustomizeExportOptions="customizeExportOptions"/>
</dx:ASPxWebDocumentViewer>

To specify a document format in the method's parameter, use the ExportFormatID enumeration value.

CustomizeLocalization Event

Enables you to customize the Web Document Viewer's localization strings.

Declaration

CustomizeLocalization: ASPxClientEvent<ASPxClientWebDocumentViewerCustomizeLocalizationEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The CustomizeLocalization event's data class is ASPxClientCustomizeLocalizationEventArgs. The following properties provide information specific to this event:

Property
WidgetLocalization

The event data class exposes the following methods:

Method Description
LoadMessages(messages) Loads the specified localization strings synchronously.
SetAvailableCultures(cultures) Specifies languages available for report localization and displayed in the Language drop-down list.

Remarks

NOTE

The complete sample project How to Localize the Web Report Designer and Document Viewer Controls is available in the DevExpress Examples repository.

Use the UpdateLocalization method in the client-side ASPxClientWebDocumentViewer.CustomizeLocalization event handler to substitute a particular localization string with the specified text.

TIP

You can use the satellite resource assemblies to translate text strings and then adjust the translation by handling the CustomizeLocalization event.

<script type="text/javascript" id="script"> 
    function customizeLocalization(s) {
        s.UpdateLocalization({
            'Search': 'Suche',
            'Search result': 'Suchergebnisse',
            'Next Page' : 'Nächste Seite',
            'Export Options' : 'Exportoptionen'
        });
    }
</script> 

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server">
    <ClientSideEvents CustomizeLocalization="customizeLocalization"/>
</dx:ASPxWebDocumentViewer>
IMPORTANT

Localization strings are case sensitive. A string is translated if you use correct case to specify it.

On a web page localized string values may be capitalized in a different manner. E.g. the 'Search result' string is displayed as 'SEARCH RESULT'.

To determine the localized string whose value you wish to change, look for the UI element with the browser's Developer Tools, as illustrated in the following picture:

web-viewer-localization-browser-inspect

See Also

CustomizeMenuActions Event

Enables you to customize Web Document Viewer menu actions.

Declaration

CustomizeMenuActions: ASPxClientEvent<ASPxClientWebDocumentViewerCustomizeMenuActionsEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The CustomizeMenuActions event's data class is ASPxClientCustomizeMenuActionsEventArgs. The following properties provide information specific to this event:

Property Description
Actions Provides access to the collection of actions available in the toolbar and menu.

The event data class exposes the following methods:

Method Description
GetById(actionId) Returns a menu action with the specified ID.

Remarks

The ASPxClientCustomizeMenuActionsEventArgs.Actions property contains all commands available in the Web Document Viewer Toolbar.

A number of commands are available out-of-the-box. To obtain such a command, call the ASPxClientCustomizeElementsEventArgs.GetById method with the ActionId parameter.

The code below demonstrates how to disable an existing command and register a custom command.

function CustomizeMenuActions(s, e) {
    var actions = e.Actions;

    // Get the "Print Page" action and hide it. 
    var printPageAction = e.GetById(DevExpress.Reporting.Viewer.ActionId.PrintPage);
    if (printPageAction)
        printPageAction.visible = false;

    // Add a new action. 
    actions.push({
        text: "Custom Command",
        imageClassName: "customButton",
        imageTemplateName: "dxrd-svg-wizard-warning",
        hasSeparator: false,
        disabled: ko.observable(false),
        visible: true,
        hotKey: { ctrlKey: true, keyCode: "Z".charCodeAt(0) },
        clickAction: function () {
            alert('Clicked.');
        }
    })
};

Review the following topic for more information: Customizing the Document Viewer Toolbar in ASP.NET .

The following code demonstrates how to perform custom actions when a user exports a document to specific types (in this example, XLS or XLSX) and retain the default handlers for other export formats.

function CustomizeMenuActions(s, e) {
    // Get the "Export To" action.
    var actionExportTo = e.GetById(DevExpress.Reporting.Viewer.ActionId.ExportTo);

    if (actionExportTo) {
        actionExportTo.clickAction = function (arg) {
            if (arg.itemData.format === "xls" || arg.itemData.format === "xlsx") {
                // Custom export.
                //...                
            }
            else if (arg.itemData.format) {
                s.ExportTo(arg.itemData.format);
            }
        }
    }     
};

CustomizeParameterEditors Event

Occurs each time a standard editor is created for a report parameter based on a parameter type.

Declaration

CustomizeParameterEditors: ASPxClientEvent<ASPxClientWebDocumentViewerCustomizeParameterEditorsEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The CustomizeParameterEditors event's data class is ASPxClientCustomizeParameterEditorsEventArgs. The following properties provide information specific to this event:

Property Description
info Provides access to an object that stores information required to serialize a parameter editor.
parameter Provides access to an object that stores information about a parameter.

Remarks

Handle the CustomizeParameterEditors event to provide custom editors for report parameters. Check the event argument's parameter property to identify a report parameter.

You can specify a custom editor in the following ways:

Create an HTML Template

Define a custom HTML template and use the info.editor property to specify a header variable with the template name.

The following example demonstrates how to provide a custom dxNumberBox parameter editor with the enabled spin buttons and limited minimum and maximum values.

<script type ="text/html" id="categoryID-custom-editor">
    <div data-bind="dxNumberBox: { value: value, showSpinButtons: true, min: 1, max: 8 }"> </div>
</script>

<script type="text/javascript">
    function CustomizeParameterEditors(s, e) {
      if (e.parameter.name == "categoryID") {
          e.info.editor = { header: 'categoryID-custom-editor' };
        }

    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server">
    <ClientSideEvents CustomizeParameterEditors="CustomizeParameterEditors" />
</dx:ASPxWebDocumentViewer>

See Provide Custom Editors for Report Parameters for more information.

Customize Editor Options

Use the info.editor.extendedOptions property to customize the corresponding DevExtreme UI widget options.

The following example shows how to show a calendar editor without a time part.

<script type ="text/html" id="categoryID-custom-editor">
    <div data-bind="dxNumberBox: { value: value, showSpinButtons: true, min: 1, max: 8 }"> </div>
</script>

<script type="text/javascript">
    function CustomizeParameterEditors(s, e) {
      if (e.parameter.type === 'System.DateTime') {
          e.info.editor = $.extend({}, e.info.editor);
          e.info.editor.extendedOptions = $.extend(e.info.editor.extendedOptions || {}, { type: 'date' });
      }         
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server">
    <ClientSideEvents CustomizeParameterEditors="CustomizeParameterEditors" />
</dx:ASPxWebDocumentViewer>

CustomizeParameterLookUpSource Event

Occurs each time a look-up editor is created for a report parameter.

Declaration

CustomizeParameterLookUpSource: ASPxClientEvent<ASPxClientWebDocumentViewerCustomizeParameterLookUpSourceEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The CustomizeParameterLookUpSource event's data class is ASPxClientCustomizeParameterLookUpSourceEventArgs. The following properties provide information specific to this event:

Property Description
dataSource Specifies the data source that provides look-up values for the parameter editor.
items Provides access to the collection of look-up parameter values.
parameter Provides access to an object that stores information about a parameter.

Remarks

Handle the CustomizeParameterLookUpSource event to customize look-up parameter values.

The following example demonstrates how to sort look-up values of the categoryName parameter based on a custom rule. Declare an array that has category names in a sequence based on the required criterion. Then, check the parameter property of the event argument to identify the required parameter. Access look-up values using the items property and sort them using a custom sorting function, which compares indexes of categories in the array. Finally, pass a result to the dataSource property to apply changes.

<dx:AspxWebDocumentViewer ID="AspxWebDocumentViewer1" runat="server">
    <ClientSideEvents CustomizeParameterLookUpSource="function(s, e) {
        var sortRule = ['Produce', 'Meat/Poultry', 'Dairy Products',
            'Grains/Cereals', 'Seafood', 'Confections', 'Condiments', 'Beverages'];

        if(e.parameter.name == 'categoryName') {
            e.items.sort(function(a, b) { 
                if (sortRule.indexOf(a.value) > sortRule.indexOf(b.value)) {
                    return 1;
                }
                if (sortRule.indexOf(a.value) < sortRule.indexOf(b.value)) {
                    return -1;
                }
                return 0;
            });
            e.dataSource = new DevExpress.data.DataSource({ store: e.items});
        }
    }"/>
</dx:AspxWebDocumentViewer>
See Also

DocumentReady Event

Occurs after the Web Document Viewer loads a report document.

Declaration

DocumentReady: ASPxClientEvent<ASPxClientWebDocumentViewerDocumentReadyEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The DocumentReady event's data class is ASPxClientWebDocumentViewerDocumentReadyEventArgs. The following properties provide information specific to this event:

Property Description
DocumentId Specifies the report document ID.
PageCount Specifies the total number of pages in a report document.
ReportId Specifies the report ID.

Remarks

Handle the DocumentReady event to respond when a document is loaded to the Web Document Viewer on the client side.

The code snippet below demonstrates how to use this event to automatically navigate pages of a document when it is created. The ASPxClientWebDocumentViewerDocumentReadyEventArgs.PageCount field of an event argument specifies the total number of pages in the loaded document. To obtain the current page number and navigate to the next page, use the ASPxClientWebDocumentViewer.GetCurrentPageIndex and ASPxClientWebDocumentViewer.GoToPage methods.

<script type="text/javascript" id="script">
    function documentReady(s, e) {
        var goToNextPage = function () {
            var pageIndex = s.GetCurrentPageIndex();
            if (e.PageCount <= pageIndex)
                return;
            s.GoToPage(pageIndex + 1);
            setTimeout(function () { goToNextPage(); }, 3000);
        }
        goToNextPage();
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="XtraReport1">
     <ClientSideEvents DocumentReady="documentReady"/>
</dx:ASPxWebDocumentViewer>
See Also

EditingFieldChanged Event

Occurs each time an editing field's value changes.

Declaration

EditingFieldChanged: ASPxClientEvent<ASPxClientWebDocumentViewerEditingFieldChangedEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The EditingFieldChanged event's data class is ASPxClientWebDocumentViewerEditingFieldChangedEventArgs. The following properties provide information specific to this event:

Property Description
Field Gets an editing field whose value has been changed.
NewValue Provides access to a new value of an editing field.
OldValue Provides access to a previous value of an editing field.

Remarks

Each time the current field value changes, the EditingFieldChanged event occurs, allowing you to respond to this action (for instance, validate input data or format the edited value).

The example below demonstrates how to change an editing field's value to a previous value if a new value does not meet to required conditions.

<script type="text/javascript" id="script">
    function editingFieldChanged(s, e) {       
        if ((e.Field.id() === "UnitsInStock") && (e.NewValue > 100))
            e.NewValue = e.OldValue;
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
     <ClientSideEvents EditingFieldChanged="editingFieldChanged"/>
</dx:ASPxWebDocumentViewer>

OnServerError Event

Occurs on the client each time a server-side error raises.

Declaration

OnServerError: ASPxClientEvent<ASPxClientWebDocumentViewerErrorEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The OnServerError event's data class is ASPxClientErrorEventArgs. The following properties provide information specific to this event:

Property Description
Error Provides access to information about a server-side error.

Remarks

Handle the OnServerError event to perform actions when an Ajax request completes with an error.

The following code snippet demonstrates how to show an alert box when any internal server error occurs.

<script type="text/javascript" id="script">
    function onError(s, e) {
        alert("Internal Server Error occurs");
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server">
    <ClientSideEvents OnServerError="onError"/>
</dx:ASPxWebDocumentViewer>

ParametersReset Event

Occurs after report parameter values are reset to their default values.

Declaration

ParametersReset: ASPxClientEvent<ASPxClientWebDocumentViewerParametersResetEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The ParametersReset event's data class is ASPxClientParametersResetEventArgs. The following properties provide information specific to this event:

Property Description
Parameters Provides access to report parameters whose values have been reset.
ParametersViewModel Provides access to a View Model for report parameters.

Remarks

The ParametersReset event fires when an end-user has pressed the Reset button in the Parameters panel, or when the ASPxClientWebDocumentViewer.ResetParameters method has been called.

The code sample below demonstrates how to use this event to automatically collapse the Parameters panel after reseting parameter values.

<script type="text/javascript" id="script">
    function parametersReset(s, e) {
        var preview = s.GetPreviewModel();
        if (preview) {
            preview.tabPanel.collapsed(true);
        }
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
    <ClientSideEvents ParametersReset ="parametersReset"/>
</dx:ASPxWebDocumentViewer>
See Also

ParametersSubmitted Event

Occurs after report parameter values are submitted.

Declaration

ParametersSubmitted: ASPxClientEvent<ASPxClientWebDocumentViewerParametersSubmittedEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The ParametersSubmitted event's data class is ASPxClientParametersSubmittedEventArgs. The following properties provide information specific to this event:

Property
Parameters
ParametersViewModel

Remarks

The ParametersSubmitted event fires when all parameter values have been entered in the Parameters panel and the Submit button has been pressed.

You can handle this event to check values of requested report parameters, or to automatically collapse the Parameters panel, as demonstrated below.

<script type="text/javascript" id="script">
    function parametersSubmitted(s, e) {
        var preview = s.GetPreviewModel();
        if (preview) {
            preview.tabPanel.collapsed(true);
        }
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
    <ClientSideEvents ParametersSubmitted ="parametersSubmitted"/>
</dx:ASPxWebDocumentViewer>
See Also

PreviewClick Event

Occurs when the left mouse button is clicked on a report document.

Declaration

PreviewClick: ASPxClientEvent<ASPxClientWebDocumentViewerPreviewClickEventHandler<ASPxClientWebDocumentViewer>>

Event Data

The PreviewClick event's data class is ASPxClientPreviewClickEventArgs. The following properties provide information specific to this event:

Property Description
Brick Provides information on a visual brick representing content of a report control that has been clicked.
Handled Specifies whether or not the event was handled and no default processing is required.
PageIndex Gets a value specifying the zero-based index of the page that has been clicked.

The event data class exposes the following methods:

Method Description
DefaultHandler Specifies the default function used to handle the ASPxClientWebDocumentViewer.PreviewClick event.
GetBrickText Returns the text displayed by the ASPxClientPreviewClickEventArgs.Brick.
GetBrickValue Returns a string providing additional information about the current ASPxClientPreviewClickEventArgs.Brick by the specified key.

Remarks

Handle the PreviewClick event to perform different actions when an end-user clicks the report document opened in the Web Document Viewer. You can obtain a text displayed by the corresponding report element using the ASPxClientPreviewClickEventArgs.GetBrickText method and additional brick information (the XRControl.Tag property value) using the ASPxClientPreviewClickEventArgs.GetBrickValue method.

The following code snippet demonstrates how to obtain the text of an element that has been clicked.

<script type="text/javascript" id="script">
    function previewClick(s, e) {
        e.Brick && alert(e.Brick.text())
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
     <ClientSideEvents PreviewClick="previewClick"/>
</dx:ASPxWebDocumentViewer>

The example below illustrates how to ask the user to confirm an operation related to expanding/collapsing data in a drill-down report and navigating to a URL. The IBrickNode.navigation property provides access to a brick's navigation settings. Use the ASPxClientPreviewClickEventArgs.Handled property to specify whether or not default processing (specified by the ASPxClientPreviewClickEventArgs.DefaultHandler function) is required, depending on the confirmation result.

<script type="text/javascript" id="script">
    function previewClick(s, e) {
        if (!e.Brick)
            return
        var navigation = e.Brick.navigation;
        if (navigation) {
            var ok = true;
            if (navigation.drillDownKey) {
                ok = confirm('Are you sure you want to expand/collapse data?');
            } else if (navigation.url) {
                ok = confirm('Are you sure you want to navigate to the following URL: ' + navigation.url);
            }
            e.Handled = !ok;
        }
    }
</script>

<dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ReportSourceId="WebReportDesigner.XtraReport1">
     <ClientSideEvents PreviewClick="previewClick"/>
</dx:ASPxWebDocumentViewer>