asp.net + exceptions and redirecting - asp.net

Question

My intention is to log an error(I am using Log4Net) when an exception is caught and redirect to a pretty looking page with some error message. I have a class that returns a Type T object , mostly a DataSet.
In my Catch statement I wrote this, it works but I am not sure if there's a more appropriate way of handling, can someone please advice. Thanks. Note that the throw cannot be omitted because the class has a return type.:
catch (Exception ex)
{
log.Error(ex);
HttpContext.Current.Response.Redirect("~/errorPage.aspx");
throw ex;
}

Answer 1

It depends upon how you want to handle error on the page, In general , unhandled exception should be bubbled up to application_error in gloabl.asax file to it generic.Here is one simple way to handle this error.
void Application_Error(object sender, EventArgs e)
{
// Code that runs when an unhandled error occurs
// Get the exception object.
Exception exc = Server.GetLastError();
// Handle HTTP errors
if (exc.GetType() == typeof(HttpException))
{
// The Complete Error Handling Example generates
// some errors using URLs with "NoCatch" in them;
// ignore these here to simulate what would happen
// if a global.asax handler were not implemented.
if (exc.Message.Contains("NoCatch") || exc.Message.Contains("maxUrlLength"))
return;
//Redirect HTTP errors to HttpError page
Server.Transfer("HttpErrorPage.aspx");
}
// For other kinds of errors give the user some information
// but stay on the default page
Response.Write("<h2>Global Page Error</h2>\n");
Response.Write(
"<p>" + exc.Message + "</p>\n");
Response.Write("Return to the <a href='Default.aspx'>" +
"Default Page</a>\n");
// Log the exception and notify system operators
ExceptionUtility.LogException(exc, "DefaultPage");
ExceptionUtility.NotifySystemOps(exc);
// Clear the error from the server
Server.ClearError();
}