OnColumnSwapping | RadGrid for ASP.NET AJAX Documentation
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OnColumnSwapping

Sys.EventArgs OnColumnSwapping Property

note

To get or set property values for client API properties, you must call property accessor methods that are named with the get_ and set_ prefixes. For example, to get or set a value for a property such as cancel, you call the get_cancel or set_cancel.

This event is fired before two columns are swapped.

Fired by RadGridTable
Arguments gridSourceColumn - returns reference to the source columngridTargetColumn - returns reference to the target column
Can be canceled Yes, set eventArgs.set_cancel(true) to cancel

Example:

<telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server">
    <ClientSettings>
        <ClientEvents OnColumnSwapping="ColumnSwapping" />
    </ClientSettings>
</telerik:RadGrid>
function ColumnSwapping(sender, eventArgs) {
    alert("Swapping columns with indices: " + eventArgs.get_gridSourceColumn().get_element().cellIndex + " and " + eventArgs.get_gridTargetColumn().get_element().cellIndex);
}
//OR
function ColumnSwapping(sender, eventArgs) {
    eventArgs.set_cancel(true) //cancel event
}
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