SharePoint Close methods for SP Long Operations and Redirect Error Page

Example 1 :

protected override void OnClick(EventArgs e)
{
 try{
    using (SPLongOperation longOp = new SPLongOperation(this.Page))
    {
      longOp.LeadingHTML = "Long Operation Title";
      longOp.TrailingHTML = "This may take few seconds.";
      longOp.Begin();
      //--------------------------
      //code for long running operation is here
      //---------------------
      EndOperation(longOp);
    }
  }
  catch (ThreadAbortException) { /* Thrown when redirected */}
  catch (Exception ex)
  {
     SPUtility.TransferToErrorPage(ex.ToString());
   }
}
protected void EndOperation(SPLongOperation operation)
{
  HttpContext context = HttpContext.Current;
  if (context.Request.QueryString["IsDlg"] != null)
  {
    context.Response.Write("<script type='text/javascript'>window.frameElement.commitPopup();</script>");
   context.Response.Flush();
   context.Response.End();
  }
  else
  {
    string url = SPContext.Current.Web.Url;
    operation.End(url, SPRedirectFlags.CheckUrl, context, string.Empty);
  }
}

Example 2 :

try

{

    SPLongOperation.Begin(

        "Calling WCF Service for adding user into External System",

        "Please wait for this process to complete. This may take a few seconds.",

        delegate(SPLongOperation longOp)

        {

            try

            {

                //Code for calling the WCF service for adding a user into an External System goes here

                // Now end the long operation

                if (Context.Request.QueryString["IsDlg"] != null)

                {

                    longOp.EndScript(String.Format(CultureInfo.InvariantCulture,

                        "<script type=\"text/javascript\">window.frameElement.commonModalDialogClose({0}, {1});</script>",

                        1, String.Format("\"{0}\"", returnValue)));

                }

                else

                {

                    string url = Context.Request.UrlReferrer.AbsoluteUri;

                    longOp.End(url,

                       Microsoft.SharePoint.Utilities.SPRedirectFlags.DoNotEndResponse,HttpContext.Current,"");

                }

            }

            catch (ThreadAbortException) { /* thrown when redirected */ }

            catch (Exception ex)

            {

                string exMessage = ex.InnerException != null ? ex.InnerException.Message : ex.Message;

                string message = String.Format("Error occurred whilst deleting relationship: {0}", exMessage);

                RedirectToErrorPage(message);

            }

        });

}

catch (ThreadAbortException) { /* thrown when redirected */ }

catch (Exception ex)

{

    string exMessage = ex.InnerException != null ? ex.InnerException.Message : ex.Message;

    string message = String.Format("Error occurred when calling WCF Service add a user into External System: {0}", exMessage);

    RedirectToErrorPage(message);

}

//The RedirectToErrorPage(message) method calls the SPUtility.TransferToErrorPage method

private void RedirectToErrorPage(string message)

{

    if (string.IsNullOrEmpty(this.Referrer))

    {

        SPUtility.TransferToErrorPage(message);

    }

    else

    {

        SPUtility.TransferToErrorPage(String.Concat(message, " {0}."), "Return to calling Web-Part page.", this.Referrer);

    }

}