CallbackEventArgsBase.Parameter Property
Gets a string that contains specific information (if any) passed from the client side.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v19.1.dll
Declaration
Property Value
| Type | Description |
|---|---|
| String | A string value that contains specific information collected on the client side and passed to the event for further server-side processing. |
Remarks
Use the Parameter property to obtain specific information which has been collected on the client side and passed via a web control’s PerfromCallback (or SendCallback) client method to the server for further server-side processing.
Example
The example below demonstrates how to manipulate ASPxHtmlEditor View Areas by CustomToolbarButton.
- Wrap the ASPxHtmlEditor with the ASPxCallbackPanel to programmatically send a callback to the server.
- Define custom toolbar buttons (CustomToolbarButton) for the ASPxHtmlEditor.
- Handle the client-side ASPxClientHtmlEditor.CustomCommand event and perform a callback by using the ASPxClientCallbackPanel.PerformCallback method.
- Handle the ASPxCallbackPanel.Callback event and define View Areas enabled by the ASPxHtmlEditor.Settings property.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/aspxhtmleditor-how-to-manipulate-aspxhtmleditor-view-areas-by-customtoolbarbutton-e3980
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxCallbackPanel" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.ASPxHtmlEditor.v13.1, Version=13.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxHtmlEditor" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxEditors" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.ASPxSpellChecker.v13.1, Version=13.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxSpellChecker" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxEditors" TagPrefix="dx" %>
<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
Namespace="DevExpress.Web.ASPxPanel" TagPrefix="dx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function OnCustomCommand(s, e) {
if(e.commandName == "close") {
cp.PerformCallback("closed");
}
if(e.commandName == "open" || e.commandName == "new")
if(confirm("Are you sure?"))
cp.PerformCallback("opened");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<dx:ASPxCallbackPanel ID="cp" runat="server" ClientInstanceName="cp" OnCallback="cp_Callback">
<PanelCollection>
<dx:PanelContent ID="PanelContent1" runat="server" SupportsDisabledAttribute="True">
<dx:ASPxHtmlEditor ID="htmlEditor" runat="server">
<ClientSideEvents CustomCommand="OnCustomCommand" />
<Toolbars>
<dx:HtmlEditorToolbar>
<Items>
<dx:CustomToolbarButton CommandName="new" Text="New">
</dx:CustomToolbarButton>
<dx:CustomToolbarButton CommandName="open" Text="Open">
</dx:CustomToolbarButton>
<dx:CustomToolbarButton CommandName="save" Text="Save">
</dx:CustomToolbarButton>
<dx:CustomToolbarButton CommandName="close" Text="Close">
</dx:CustomToolbarButton>
</Items>
</dx:HtmlEditorToolbar>
</Toolbars>
</dx:ASPxHtmlEditor>
</dx:PanelContent>
</PanelCollection>
</dx:ASPxCallbackPanel>
</form>
</body>
</html>
Related GitHub Examples
The following code snippets (auto-collected from DevExpress Examples) contain references to the Parameter property.
Note
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