This documentation is archived and is not being maintained.

LinqDataSourceDeleteEventArgs Class

Provides data for the Deleting event.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web.Extensions (in System.Web.Extensions.dll)

[AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public class LinqDataSourceDeleteEventArgs : CancelEventArgs

The LinqDataSourceDeleteEventArgs object is passed to any handler for the Deleting event. The OriginalObject property contains the data that will be deleted.

If the object that represents the data source throws a validation exception before it deletes the data, the Exception property contains an instance of the LinqDataSourceValidationException class. You can retrieve all the validation exceptions through the InnerExceptions property. If no validation exception is thrown, the Exception property contains null. If you handle the validation exceptions and do not want the exception to be re-thrown, set the ExceptionHandled property to true.

You create an event handler for the Deleting event to validate the data, to examine validation errors from the data class, or to cancel the delete operation. You cancel the delete operation by setting the Cancel property to true.

By default, the LinqDataSource control stores the original values from the data source in view state in the Web page, except those whose ColumnAttribute attribute is marked as UpdateCheck.Never. LINQ to SQL automatically checks the integrity of the data before deleting the data. It does this by comparing the current values in the data source with the original values that are stored in view state. You can perform additional data validation by creating a handler for the Deleting event.

The following example shows how to cancel the delete operation based on a property in the OriginalObject property and a value from the Web page. In the example, users must select a CheckBox control to confirm that they want to delete a product record when its OnSale property is set to true.

protected void LinqDataSource_Deleting(object sender, LinqDataSourceDeleteEventArgs e)
    Product product = (Product)e.OriginalObject;
    if (product.OnSale && !confirmCheckBox.Checked)
        e.Cancel = true;


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5