GridView.RowDeleted Event
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Occurs when a row's Delete button is clicked, but after the GridView control deletes the row.
public:
event System::Web::UI::WebControls::GridViewDeletedEventHandler ^ RowDeleted;public event System.Web.UI.WebControls.GridViewDeletedEventHandler RowDeleted;member this.RowDeleted : System.Web.UI.WebControls.GridViewDeletedEventHandler Public Custom Event RowDeleted As GridViewDeletedEventHandler Event Type
Examples
The following example demonstrates how to use the RowDeleted event to check the result of the delete operation. A message is displayed to indicate to the user whether the operation succeeded.
<%@ Page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void CustomersGridView_RowDeleted(Object sender, GridViewDeletedEventArgs e)
{
// Display whether the delete operation succeeded.
if(e.Exception == null)
{
Message.Text = "Row deleted successfully.";
}
else
{
Message.Text = "An error occurred while attempting to delete the row.";
e.ExceptionHandled = true;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView RowDeleted Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView RowDeleted Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="true"
autogeneratedeletebutton="true"
datakeynames="CustomerID"
onrowdeleted="CustomersGridView_RowDeleted"
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>
<%@ Page language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub CustomersGridView_RowDeleted(sender As Object, e As GridViewDeletedEventArgs)
' Display whether the delete operation succeeded.
If e.Exception Is Nothing Then
Message.Text = "Row deleted successfully."
Else
Message.Text = "An error occurred while attempting to delete the row."
e.ExceptionHandled = True
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridView RowDeleted Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridView RowDeleted Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="true"
autogeneratedeletebutton="true"
datakeynames="CustomerID"
onrowdeleted="CustomersGridView_RowDeleted"
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>
Remarks
The RowDeleted event is raised when a row's Delete button is clicked, but after the GridView control deletes the row. This enables you to provide an event-handling method that performs a custom routine, such as checking the results of the delete operation, whenever this event occurs.
A GridViewDeletedEventArgs object is passed to the event-handling method, which enables you to determine the number of rows affected and any exceptions that might have occurred. You can also indicate whether the exception was handled in the event-handling method by setting the ExceptionHandled property of the GridViewDeletedEventArgs object.
For more information about how to handle events, see Handling and Raising Events.
