ErrorHandling Class

Provides static members for the error handling in ASP.NET Web Forms applications.

Namespace: DevExpress.ExpressApp.Web

Assembly: DevExpress.ExpressApp.Web.v23.1.dll

NuGet Package: DevExpress.ExpressApp.Web

Declaration

C#

public class ErrorHandling

VB.NET

Public Class ErrorHandling

Related API Members

The following members return ErrorHandling objects:

• ErrorHandling.Instance

Remarks

The ErrorHandling is an auxiliary class that is used to handle errors occurring in ASP.NET Web Forms applications.

By default, the information related to the error that occurred is displayed, logged, and the application administrator receives an e-mail notification. This behavior is configurable via the configuration file (Web.config) options listed in the Error Handling in ASP.NET Web Forms Applications topic. Additionally, you can use the ErrorHandling.CustomSendErrorNotification and ErrorHandling.CustomSendMailMessage events to customize the notifications mechanism. You can subscribe to these events in the ASP.NET Web Forms application’s Session_Start method. This method’s code is located in the Global.asax.cs (Global.asax.vb) file of the ASP.NET Web Forms application project. The following snippet illustrates subscribing to the ErrorHandling.CustomSendMailMessage.

C#

protected void Session_Start(object sender, EventArgs e) {
    WebApplication.SetInstance(Session, new MySolutionWebApplication());
    ErrorHandling.CustomSendMailMessage += 
        new EventHandler<CustomSendMailMessageEventArgs>(ErrorHandling_CustomSendMailMessage);
     // ...
    WebApplication.Instance.Setup();
    WebApplication.Instance.Start();
}

VB.NET

Protected Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
    WebApplication.SetInstance(Session, New MySolutionWebApplication())
    AddHandler ErrorHandling.CustomSendMailMessage, AddressOf ErrorHandling_CustomSendMailMessage
     ' ...
    WebApplication.Instance.Setup()
    WebApplication.Instance.Start()
End Sub

The default XAF web application project contains the Error.aspx.cs (Error.aspx.vb) file, where you can see examples of this class’ members in use.

Inheritance

Object

ErrorHandling