OnColumnHiding | RadGrid for ASP.NET AJAX Documentation
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OnColumnHiding

Telerik.Web.UI.GridColumnEventArgs OnColumnHiding 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 a column is hidden.

Fired by RadGrid
Arguments gridColumn - returns a reference to the clicked GridColumn object domEvent - returns the DOM event that was raised for the current event cancel - gets or sets the canceled status of the event
Can be canceled Yes, set eventArgs.set_cancel(true) to cancel

Example:

<telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server">
    <ClientSettings>
        <ClientEvents OnColumnHiding="ColumnHiding" />
    </ClientSettings>
</telerik:RadGrid>
function ColumnHiding(sender, eventArgs) {
    alert("Hiding column: " + eventArgs.get_gridColumn().get_element().cellIndex);
}
//OR
function ColumnHiding(sender, eventArgs) {
    eventArgs.set_cancel(true) //cancel event
}
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