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ASPxClientQueryBuilder Class

The client-side equivalent of the ASPxQueryBuilder control.

Declaration

declare class ASPxClientQueryBuilder 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): ASPxClientQueryBuilder

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
ASPxClientQueryBuilder

An ASPxClientQueryBuilder 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 ASPxClientQueryBuilder type. As a result, the object's type is now known and ASPxClientQueryBuilder 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 = ASPxClientQueryBuilder.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 'ASPxClientQueryBuilder1', the object can be type cast in the following manner:

    ...
    var clientObject = ASPxClientQueryBuilder.Cast('ASPxClientQueryBuilder1');
    

GetDesignerModel Method

Returns the object model of a Query Builder.

Declaration

GetDesignerModel(): any

Returns

Type Description
any

A Object value.

GetJsonQueryModel Method

Gets a client-side model of the currently opened query serialized to Json.

Declaration

GetJsonQueryModel(): string

Returns

Type Description
string

A string containing a query model.

IsQueryValid Method

Specifies whether or not the current query is a valid SQL string.

Declaration

IsQueryValid(): boolean

Returns

Type Description
boolean

true if the query is valid; otherwise false.

PerformCallback(arg) Method

Sends a callback to the server and generates the server-side event, passing it the specified argument.

Declaration

PerformCallback(arg: string, onSuccess?: (arg: string) => void): void

Parameters

Name Type Description
arg string

A string value that represents any information that needs to be sent to the server-side event.

Optional Parameters

Name Type Default Description
onSuccess (arg: string) => void null

A client action to perform if the server round-trip completed successfully.

Remarks

Use the PerformCallback method if you need to asynchronously go to the server and perform server-side processing using AJAX-based callback technology. You can pass the required information which can be collected on the client side as a string of arguments using the PerformCallback method args parameter. The onSuccess parameter allows you to specify a client function that should be executed after the server round-trip completed successfully.

Save Method

Saves the current query.

Declaration

Save(): void

Remarks

When the Save method is called on the client side, the server-side ASPxQueryBuilder.SaveQuery event occurs allowing you to obtain the resulting query as a SQL query string or a TableQuery object.

Calling the Save method has the same effect as clicking the Save command on the Query Builder toolbar.

See Also

ShowPreview Method

Invokes a Previewing Results for the current query.

Declaration

ShowPreview(): void
See Also

UpdateLocalization(localization) Method

Updates the ASPxClientQueryBuilder properties' localization settings.

Declaration

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

Parameters

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

A dictionary containing the property names, along with their localized equivalents.

Events

BeforeRender Event

Occurs before the Query Builder UI is initialized.

Declaration

BeforeRender: ASPxClientEvent<ASPxClientQueryBuilderBeforeRenderEventHandler<ASPxClientQueryBuilder>>

Event Data

The BeforeRender event handler receives an argument of the ASPxClientQueryBuilderRenderModelEventArgs type.

Remarks

Handle the BeforeRender event to perform required actions before the Query Builder's UI initialization.

BeginCallback Event

Occurs when a callback for server-side processing is initiated.

Declaration

BeginCallback: ASPxClientEvent<ASPxClientBeginCallbackEventHandler>

Event Data

The BeginCallback event handler receives an argument of the ASPxClientBeginCallbackEventArgs type. The following properties provide information specific to this event.

Property Description
command Gets a command name that identifies which client action forced a callback to occur.

Remarks

The BeginCallback and ASPxClientQueryBuilder.EndCallback events can be used to perform specific client-side actions when a callback is being processed on a server.

See Also

CallbackError Event

Fires on the client if any server error occurs during server-side processing of a callback sent by ASPxClientQueryBuilder.

Declaration

CallbackError: ASPxClientEvent<ASPxClientCallbackErrorEventHandler>

Event Data

The CallbackError event handler receives an argument of the ASPxClientCallbackErrorEventArgs type. The following properties provide information specific to this event.

Property Description
handled Gets or sets whether the event is handled and the default error handling actions are not required.
message Gets the error message that describes the server error that occurred.

Remarks

The CallbackError event enables you to properly respond to a server error occurring as a result of a callback being processed on the server side. Handle this event to perform specific client-side actions, such as displaying explanatory text or an image related to the error.

Typically, a server error which occurs during server-side processing of a callback, leads to web application hanging, because, in this case, no proper response is generated for a control that initiated the callback. However, AJAX-enabled web controls from the DevExpress product line are able to automatically catch server errors occurring within handlers of their server-side events, and to pass the related error information to the client for further processing through the CallbackError event's argument.

To learn more, see the Handling Callback Exceptions on Client topic.

See Also

CustomizeLocalization Event

Enables you to customize the Query Builder's localization strings.

Declaration

CustomizeLocalization: ASPxClientEvent<ASPxClientQueryBuilderCustomizeLocalizationEventHandler<ASPxClientQueryBuilder>>

Event Data

The CustomizeLocalization event handler receives an argument of the ASPxClientEventArgs type.

Remarks

Use the client-side ASPxClientQueryBuilder.UpdateLocalization method in the CustomizeLocalization event to manually substitute particular localization strings with custom ones.

See Also

CustomizeToolbarActions Event

Enables you to customize the menu actions of a Query Builder.

Declaration

CustomizeToolbarActions: ASPxClientEvent<ASPxClientQueryBuilderCustomizeToolbarActionsEventHandler<ASPxClientQueryBuilder>>

Event Data

The CustomizeToolbarActions event handler receives an argument of the ASPxClientCustomizeMenuActionsEventArgs type. 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.

EndCallback Event

Occurs on the client after a callback's server-side processing has been completed.

Declaration

EndCallback: ASPxClientEvent<ASPxClientEndCallbackEventHandler>

Event Data

The EndCallback event handler receives an argument of the ASPxClientEndCallbackEventArgs type. The following properties provide information specific to this event.

Property Description
command Gets a command name that identifies which client action forced a callback to occur.

Remarks

The ASPxClientQueryBuilder.BeginCallback and EndCallback events can be used to perform specific client-side actions when a callback is being processed on a server.

See Also

OnServerError Event

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

Declaration

OnServerError: ASPxClientEvent<ASPxClientQueryBuilderErrorEventHandler<ASPxClientQueryBuilder>>

Event Data

The OnServerError event handler receives an argument of the ASPxClientErrorEventArgs type. 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:ASPxQueryBuilder ID="ASPxQueryBuilder1" runat="server">     
    <ClientSideEvents OnServerError="onError"/> 
</dx:ASPxQueryBuilder>

SaveCommandExecute Event

Occurs when executing the Save command on the client.

Declaration

SaveCommandExecute: ASPxClientEvent<ASPxClientQueryBuilderSaveCommandExecuteEventHandler<ASPxClientQueryBuilder>>

Event Data

The SaveCommandExecute event handler receives an argument of the ASPxClientQueryBuilderSaveCommandExecuteEventArgs type. The following properties provide information specific to this event.

Property Description
handled Specifies whether or not the event was handled.