LinkedResource として画像を含むメールを送信している状況があります。
ImageStream を使用してファイルを読み取ったところ、機能しました。
問題 :
応答がクライアントに到着すると、最初にこの画像にアクセスしようとしますが、電子メールを非同期で送信し、送信が完了していないため、ファイルにアクセスできないというエラーが表示されます。
それを行うより良い方法はありますか?
FileStream ImageStream = new FileStream(QRPath, FileMode.Open);
System.Net.Mail.LinkedResource imageResource = new System.Net.Mail.LinkedResource(ImageStream, System.Net.Mime.MediaTypeNames.Image.Jpeg);
imageResource.ContentId = "AttchImg";
htmlView.LinkedResources.Add(imageResource);
SendMail(EmailMessage,true);
private void SendMail(MailMessage EmailMessage,bool IsAsync)
{
string FromEmail = ConfigurationSettings.AppSettings["EmailSender"];
string FromPassword = ConfigurationSettings.AppSettings["EmailSenderPass"];
EmailMessage.From = new System.Net.Mail.MailAddress(FromEmail);
if (IsAsync)
{
try
{
AsyncMethodCaller caller = new AsyncMethodCaller(SendMailInSeperateThread);
AsyncCallback callbackHandler = new AsyncCallback(AsyncCallback);
caller.BeginInvoke(EmailMessage, callbackHandler, null);
}
catch (Exception ex)
{
//Logging
}
}
else
{
SmtpClient smtp = new System.Net.Mail.SmtpClient();
smtp.Host = ConfigurationSettings.AppSettings["EmailSenderSmtpHost"];
smtp.Port = Convert.ToInt32(ConfigurationSettings.AppSettings["Port"]);//;587;
//For google use smtp.EnableSsl = true;
smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
smtp.Credentials = new NetworkCredential(FromEmail, FromPassword);
smtp.Timeout = 20000;
smtp.Send(EmailMessage);
}
}
private void SendMailInSeperateThread(MailMessage message)
{
try
{
SmtpClient smtp = new System.Net.Mail.SmtpClient();
smtp.Host = ConfigurationSettings.AppSettings["EmailSenderSmtpHost"];
smtp.Port = Convert.ToInt32(ConfigurationSettings.AppSettings["Port"]);//;587;
//For google use smtp.EnableSsl = true;
smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
string FromEmail = ConfigurationSettings.AppSettings["EmailSender"];
string FromPassword = ConfigurationSettings.AppSettings["EmailSenderPass"];
smtp.Credentials = new NetworkCredential(FromEmail, FromPassword);
smtp.Timeout = 20000;
smtp.Send(message);
//smtp.Dispose();
//message.AlternateViews[0].LinkedResources.Dispose();
//message.AlternateViews[1].LinkedResources.Dispose();
//message.Dispose();
// If you have a flag checking to see if an email was sent, set it here
// Pass more parameters in the delegate if you need to...
}
catch (Exception e)
{
// This is very necessary to catch errors since we are in
// a different context & thread
//Elmah.ErrorLog.GetDefault(null).Log(new Error(e));
}
}
private void AsyncCallback(IAsyncResult ar)
{
try
{
AsyncResult result = (AsyncResult)ar;
AsyncMethodCaller caller = (AsyncMethodCaller)result.AsyncDelegate;
caller.EndInvoke(ar);
}
catch (Exception e)
{
//Elmah.ErrorLog.GetDefault(null).Log(new Error(e));
//Elmah.ErrorLog.GetDefault(null).Log(new Error(new Exception("Emailer - This hacky asynccallback thing is puking, serves you right.")));
}
}
私はあなたがそれを行うことができることを発見しました:
LinkedResource imageResource = new LinkedResource("C:\myImage.png", "image/jpg");
それは、Sriram Sakthivel が書いたよりも良い方法ですか ???