OnColumnShowing

Telerik.Web.UI.GridColumnEventArgs OnColumnShowing Property

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 shown.

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
Can be canceled	Yes, set eventArgs.set_cancel(true) to cancel

Example:

ASP.NET

<telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server">
    <ClientSettings>
        <ClientEvents OnColumnShowing="ColumnShowing" />
    </ClientSettings>
</telerik:RadGrid>

JavaScript

function ColumnShowing(sender, eventArgs) {
    alert("Showing column: " + eventArgs.get_gridColumn().get_element().cellIndex);
}
//OR
function ColumnShowing(sender, eventArgs) {
    eventArgs.set_cancel(true) //cancel event
}