Session changes done in application_Error rolled back after redirect

Question

I have an asp.net application and I am trying to handle custom exception using Application_Error. It works nicely but I have new requirement to set the error data in Session obj

Answer 1

Add a directive to the Global.asax file, Imports the System.Web Namespace

 <%@ Import Namespace="System.Web" %>


void Application_Error(object sender, EventArgs e) {

   string message = Server.GetLastError().Message;
   Session["error"] = message;
   Server.Transfer("Error.aspx");

}

Write the error message added in the sesion object in the Error.aspx page

 protected void Page_Load(object sender, EventArgs e){
    if (!this.IsPostBack)
        Response.Write(Session["error"].ToString());

}