OnClick

The Click server side event is triggered when a tile is clicked with the left mouse button (or is tapped on a touch device) and the AutoPostBack property is set to true. Navigation will not occur even if a NavigateUrl is provided in the given tile, but a postback will be invoked instead.

The event handler receives two arguments - of type object that is a reference to the RadBaseTile control that fired the event and can be cast to it, and a System.EventArgs object that can be used to get a reference to the clicked Tile through its Tile property. It returns an object of type RadBaseTile.

<telerik:RadTextTile ID="Tile1" runat="server" AutoPostBack="true" 
    Text="Tile for selection" 
    OnClick="Tile1_Click">
</telerik:RadTextTile>
<asp:Label Text="" runat="server" ID="Label1"/>

protected void Tile1_Click(object sender, EventArgs e)
{
    string script = "alert('Tile with ID  " + Tile1.ID + " is clicked');";
    ScriptManager.RegisterStartupScript(this.GetType(), "Alert", script, true);
}

Protected Sub Tile1_Click(sender As Object, e As EventArgs)
    Dim script As String = "alert('Tile with ID  " + Tile1.ID + " is clicked');"
    ClientScript.RegisterClientScriptBlock(Me.GetType(), "Alert", script, True)
End Sub