sharepoint 长时间操作处理。

 try
            {
                using (SPLongOperation operation = new SPLongOperation(this.Page))
                {
                    operation.LeadingHTML = "Please wait while the operation runs";
                    operation.TrailingHTML = "";
                    operation.Begin();

                      //you code
                    
                    operation.End("http://www/reports.aspx", Microsoft.SharePoint.Utilities.SPRedirectFlags.Default, this.Context, "");
                }
            }
            catch (Exception ex)
            {

                Response.Write(ex.Message);
            }