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GridViewDeleteEventArgs Class

Note: This class is new in the .NET Framework version 2.0.

Provides data for the RowDeleting event.

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

public class GridViewDeleteEventArgs : CancelEventArgs
public class GridViewDeleteEventArgs extends CancelEventArgs
public class GridViewDeleteEventArgs extends CancelEventArgs

The GridView control raises the RowDeleting event when a Delete button (a button with its CommandName property set to "Delete") is clicked, but before the GridView control deletes the record. This allows you to provide an event-handling method that performs a custom routine, such as canceling the delete operation, whenever this event occurs.

A GridViewDeleteEventArgs object is passed to the event-handling method, which allows you to determine the index of the row being deleted and to indicate that the delete operation should be canceled. To cancel the delete operation, set the Cancel property of the GridViewDeleteEventArgs object to true. You can also manipulate the Keys and Values collections, if necessary, before the values are passed to the data source.

For more information about handling events, see Consuming Events.

For a list of initial property values for an instance of GridViewDeleteEventArgs, see the GridViewDeleteEventArgs constructor.

The following example demonstrates how to use the GridViewDeleteEventArgs object passed to the event-handling method to cancel the delete operation if the user attempts to remove the last record from a GridView control.


<%@ Page language="C#" %>

<script runat="server">

  void CustomersGridView_RowDeleting(Object sender, GridViewDeleteEventArgs e)
  {
    
    // Cancel the delete operation if the user attempts to remove
    // the last record from the GridView control.
    if (CustomersGridView.Rows.Count <= 1)
    {
        
      e.Cancel = true;
      Message.Text = "You must keep at least one record.";
            
    }
    
  }  

</script>

<html>
  <body>
    <form runat="server">
        
      <h3>GridView RowDeleting Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>
                
      <br/>
            
      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogeneratedeletebutton="true"
        datakeynames="CustomerID"
        onrowdeleting="CustomersGridView_RowDeleting"  
        runat="server">
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        deletecommand="Delete from Customers where CustomerID = @CustomerID"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
      
    </form>
  </body>
</html>



System.Object
   System.EventArgs
     System.ComponentModel.CancelEventArgs
      System.Web.UI.WebControls.GridViewDeleteEventArgs

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 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0

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