Я получаю только одну запись на gridview

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Я работаю над EWS, чтобы получить всю недоставленную электронную почту, и на консоли она показывает всю недоставленную электронную почту, но на gridview она показывает только одну запись, и эта запись была первой. И вот мой код. Пожалуйста, помогите мне с моей работой.

protected void Button1_Click(object sender, EventArgs e)
       {
           EmailMethods email = new EmailMethods();

           email.EmailServer = "https://SampleEWSEmail.asmx";
           email.AccountName = ConfigurationManager.AppSettings["Account"];
           email.Password = ConfigurationManager.AppSettings["Secret"];
           email.Domain = ConfigurationManager.AppSettings["Domain"];
           email.GetEmails();


           DataTable dt = new DataTable();
           dt.Columns.Add("Subject", typeof(string));
           dt.Columns.Add("Sender", typeof(string));
           dt.Columns.Add("DateSent", typeof(string));
           dt.Columns.Add("DateReceive", typeof(string));


           foreach (string item in email.EmailList)
           {

               dt.Rows.Add(email.Subject, email.Sender, email.DateSent, email.DateReceive);
           }
           GridView1.DataSource = dt;
           GridView1.DataBind();


       }
   }

Что я уже пробовал:

И вот код, чтобы получить все недоставленные письма.

<pre> public void GetEmails()
        {
            if (EmailServer != "" && AccountName != "" && Password != "")
            {
                try
                {
                    EmailList = new List<string>();
                    
                    
                    ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;

                    ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013_SP1);


                    service.Credentials = new WebCredentials(AccountName, Password, Domain);
                    service.Url = new Uri(EmailServer);

                    
                    DisplayErrorEmails(service);
                    
                }
                catch (Exception ex)
                {
                    Status = "Error: " + ex.Message;
                }
            }
            else
            {
                Status = "Please provide the Email Server, Account Name and Password.";
            }

        }

<pre lang="c#"><pre> private bool DisplayErrorEmails(ExchangeService service)
        {
            try
            {


                FindItemsResults<item> findResults;
               
                SearchFilter.SearchFilterCollection compoundFilter =
                    new SearchFilter.SearchFilterCollection(LogicalOperator.Or);
                compoundFilter.Add(new SearchFilter.ContainsSubstring(ItemSchema.Body, "Sorry, I couldn't find any host named", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The server is unable to connect", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Your outgoing message timed out because of issues concerning the incoming server.", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Invalid characters", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Access denied, spam abuse detected", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Access denied, banned sender", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The email account that you tried to reach does not exist", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The domain name in the email address is incorrect", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Host unknown or Domain lookup failed", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Mailbox full or Quota exceeded", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Mailbox unavailable", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Mailbox not found, Invalid mailbox, or User unknown", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "A time-out occurred while communicating with the server", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Timeout connection problem: there have been issues during the message transfer", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Connection refused or inability to open an SMTP stream", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The server cannot verify the user, but it will try to deliver the message anyway", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The service is unavailable due to a connection problem: it may refer to an exceeded limit of simultaneous connections, or a more general temporary problem", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The recipient's mailbox has exceeded its storage limi", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The recipient's Exchange Server incoming mail queue has been stopped", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The recipient's server is not responding", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The connection was dropped during the transmission", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The maximum hop count was exceeded for the message: an internal loop has occurred", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "A routing error", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Your ISP's server or the server that got a first relay from yours has encountered a connection problem", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Too many emails sent or too many recipients: more in general, a server storage limit exceeded", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "An error of your mail server, often due to an issue of the local anti-spam filter", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "A syntax error: the server couldn't recognize the command", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The command is not implemented", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The server has encountered a bad sequence of commands, or it requires an authentication", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "A command parameter is not implemented", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Bad email address", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "A DNS error: the host server for the recipient's domain name cannot be found", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Address type is incorrect: another problem concerning address misspelling.In few cases, however, it's related to an authentication issue", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The total size of your mailing exceeds the recipient server's limits", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "A problem occurred while delivering this message to this email address", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "This message hasn't been delivered yet", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The server could not be found", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Outlook is unable to connect to your outgoing (SMTP) e-mail server", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "The operation timed out waiting for a response from the receiving (POP) server", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "A time-out occurred while communicating with the server", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Delivery has failed to these recipients or groups", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));
                compoundFilter.Add(new SearchFilter.ContainsSubstring(EmailMessageSchema.Body, "Delivery is delayed to these recipients or groups", ContainmentMode.ExactPhrase, ComparisonMode.IgnoreCaseAndNonSpacingCharacters));


                MailMessage msg = new MailMessage();
                
                //Displays the result
                ItemView view = new ItemView(100);
                do
                {
                    findResults = service.FindItems(WellKnownFolderName.Inbox, compoundFilter, view);
                    foreach (Item item in findResults.Items)
                    {
                        if (findResults.ToString() != "")
                        {
                            
                            EmailList.Add(Subject = item.Subject.ToString());
                            
                            Console.WriteLine("Subject: " + item.Subject.ToString());
                            EmailList.Add(Sender = item.DisplayTo.ToString());
                            
                            EmailList.Add(DateReceive = item.DateTimeReceived.ToString());
                            EmailList.Add(DateSent = item.DateTimeSent.ToString());
                            
                            
                        }

                    }
                    if (findResults.NextPageOffset != null)
                    {
                        view.Offset = (int)findResults.NextPageOffset;
                    }

                }
                while (findResults.MoreAvailable);

                Status = "list of undelivered email.";
                return true;
            }
            catch (Exception ex)
            {
                Status = "Error: " + ex.Message;
                return false;
            }
        }

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