Restricting Tab Item Closing

The closure of TabItem can now be restricted by setting e.Cancel to true in OnCloseButtonClick delegate. “e” represents the event argument CloseTabEventArgs for OnCloseButtonClick event. The default value of e.Cancel is false.

The following code illustrates the same.

<syncfusion:TabControlExt OnCloseButtonClick="TabControlExt_OnCloseButtonClick">

            <syncfusion:TabItemExt Header="Tab1"/>
            
            <syncfusion:TabItemExt Header="Tab2"/>
            
            <syncfusion:TabItemExt Header="Tab3"/>
            
</syncfusion:TabControlExt>
private void TabControlExt_OnCloseButtonClick(object sender, CloseTabEventArgs e)
 
 {

            if (e.TargetTabItem.Header.ToString() == "Tab1")
                e.Cancel = true;
 }