FormViewDeletedEventArgs.Exception Property
.NET Framework (current version)
Gets the exception (if any) that was raised during the delete operation.
Assembly: System.Web (in System.Web.dll)
Use the Exception property to determine the exception (if any) that was raised during the delete operation. If no exceptions were raised, this property returns null.
Note |
|---|
If an exception was raised and you decide to handle the exception in the event handler, be sure to set the ExceptionHandled property to true; otherwise, the FormView control re-throws the exception. |
The following example demonstrates how to use the Exception property to determine whether an exception occurred during a delete operation.
<%@ 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 EmployeeFormView_ItemDeleted(Object sender, FormViewDeletedEventArgs e) { // Use the Exception property to determine whether an exception // occurred during the delete operation. if (e.Exception == null) { // Use the AffectedRows property to determine whether the // record was deleted. Sometimes an error might occur that // does not raise an exception, but prevents the delete // operation from completing. if (e.AffectedRows == 1) { MessageLabel.Text = "Record deleted successfully."; } else { MessageLabel.Text = "An error occurred during the delete operation."; } } else { // Insert the code to handle the exception. MessageLabel.Text = e.Exception.Message; // Use the ExceptionHandled property to indicate that the // exception has already been handled. e.ExceptionHandled = true; } } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>FormViewDeletedEventArgs Example</title> </head> <body> <form id="form1" runat="server"> <h3>FormViewDeletedEventArgs Example</h3> <asp:formview id="EmployeeFormView" datasourceid="EmployeeSource" allowpaging="true" datakeynames="EmployeeID" onitemdeleted="EmployeeFormView_ItemDeleted" runat="server"> <itemtemplate> <table> <tr> <td> <asp:image id="EmployeeImage" imageurl='<%# Eval("PhotoPath") %>' alternatetext='<%# Eval("LastName") %>' runat="server"/> </td> <td> <h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3> <%# Eval("Title") %> </td> </tr> <tr> <td colspan="2"> <asp:button id="DeleteButton" text="Delete Record" commandname="Delete" runat="server" /> </td> </tr> </table> </itemtemplate> </asp:formview> <asp:label id="MessageLabel" forecolor="Red" runat="server"/> <!-- 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="EmployeeSource" selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]" deletecommand="Delete [Employees] Where [EmployeeID]=@EmployeeID" connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" runat="server"/> </form> </body> </html>
.NET Framework
Available since 2.0
Available since 2.0
Show:
