邮件发送但从不返回
本文关键字：返回 | 更新日期: 2023-09-27 17:57:00
我一直在开发一个网站，您可以在其中直接向特定电子邮件发送查询邮件。
起初我以为邮件没有发送，因为该网站在我单击发送按钮后会继续加载。但是当我检查我的电子邮件时，我很惊讶我发送的邮件在那里。但是当我检查我的网站（我有查询表格）时，它仍在加载。
假设说"您的消息已发送！"的ViewBag仍然没有显示，即使我已经收到了邮件。似乎
await smtp.SendMailAsync(message);
不要回来。我是这种事情的新手。我希望有人能帮助我。提前谢谢你。这是我的控制器：
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Index(EmailFormModel model, IEnumerable<HttpPostedFileBase> files)
{
try
{
if (ModelState.IsValid)
{
List<string> paths = new List<string>();
foreach (var file in files)
{
if (file.ContentLength > 0)
{
var fileName = Path.GetFileName(file.FileName);
var path = Path.Combine(System.Web.HttpContext.Current.Server.MapPath("~/App_Data/uploads"), fileName);
file.SaveAs(path);
paths.Add(path);
}
}
var message = new MailMessage();
foreach (var path in paths)
{
var fileInfo = new FileInfo(path);
var memoryStream = new MemoryStream();
using (var stream = fileInfo.OpenRead())
{
stream.CopyTo(memoryStream);
}
memoryStream.Position = 0;
string fileName = fileInfo.Name;
message.Attachments.Add(new Attachment(memoryStream, fileName));
}
//Rest of business logic here
string EncodedResponse = Request.Form["g-Recaptcha-Response"];
bool IsCaptchaValid = (ReCaptcha.Validate(EncodedResponse) == "True" ? true : false);
if (IsCaptchaValid)
{
var body = "<p><b>Email From:</b> {0} ({1})</p><p><b>Subject:</b> {2} </p><p><b>Software Description:</b></p><p>{4}</p><p><b>Message:</b></p><p>{3}</p>";
message.To.Add(new MailAddress("email@mydomain.com")); // replace with valid value
message.From = new MailAddress("email@randomdomain.com"); // replace with valid value
message.Subject = "(Inquire for SELLING)";
message.Body = string.Format(body, model.FromName, model.FromEmail, model.FromSubject, model.Message, model.Desc);
message.IsBodyHtml = true;
using (var smtp = new SmtpClient())
{
var credential = new NetworkCredential
{
UserName = "email@mydomain.com", // replace with valid value
Password = "0000" // replace with valid value
};
smtp.Credentials = credential;
smtp.Host = "relay-hosting.secureserver.net";
smtp.Port = 25;
smtp.Timeout = 1000;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.UseDefaultCredentials = false;
smtp.SendCompleted += (s, e) =>
{
//delete attached files
foreach (var path in paths)
System.IO.File.Delete(path);
};
await smtp.SendMailAsync(message);
ViewBag.Message = "Your message has been sent!";
ModelState.Clear();
return View("Index");
}
}
else
{
TempData["recaptcha"] = "Please verify that you are not a robot!";
}
} return View(model);
}
catch (Exception ex)
{
return View("Error");
}
}
我以前遇到过同样的问题。Attachments被保留，需要先处理掉，然后才能删除它们。如果不调用.Dispose文件，文件将被锁定。试试这个：
[
HttpPost,
ValidateAntiForgeryToken
]
public async Task<ActionResult> Index(EmailFormModel model,
IEnumerable<HttpPostedFileBase> files)
{
try
{
if (ModelState.IsValid)
{
string EncodedResponse = Request.Form["g-Recaptcha-Response"];
bool IsCaptchaValid = ReCaptcha.Validate(EncodedResponse) == "True";
if (IsCaptchaValid)
{
var paths = GetUploadPaths(files);
using (var message = ConstructMailMessage(model))
{
AppendAttachments(paths, message.Attachments);
using (var smtp = new SmtpClient())
{
var credential = new NetworkCredential
{
UserName = "...", // replace with valid value
Password = "..." // replace with valid value
};
smtp.Credentials = credential;
smtp.Host = "relay-hosting.secureserver.net";
smtp.Port = 25;
smtp.Timeout = 1000;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.UseDefaultCredentials = false;
smtp.SendCompleted += (s, e) =>
{
// Ensure disposed first.
foreach (var a in message.Attachments) a.Dispose();
foreach (var path in paths) File.Delete(path);
};
await smtp.SendMailAsync(message);
ViewBag.Message = "Your message has been sent!";
ModelState.Clear();
return View("Index");
}
}
}
else
{
TempData["recaptcha"] = "Please verify that you are not a robot!";
}
}
return View(model);
}
catch (Exception ex)
{
return View("Error");
}
}
在分离一些核心逻辑方面，我尝试了一种略有不同的方法。例如，现在有一个帮助程序方法用于获取上传文件路径GetUploadPaths和一个用于通过AppendAttachments将附件附加到.Attachments实例。此外，现在还有一个ConstructMailMessage函数也可以做到这一点。
public List<string> GetUploadPaths(IEnumerable<HttpPostedFileBase> files)
{
var paths = new List<string>();
foreach (var file in files)
{
if (file.ContentLength > 0)
{
var fileName = Path.GetFileName(file.FileName);
var path = Path.Combine(HttpContext.Current.Server.MapPath("~/App_Data/uploads"), fileName);
file.SaveAs(path);
paths.Add(path);
}
}
return paths;
}
public MailMessage ConstructMailMessage(EmailFormModel model)
{
var message = new MailMessage();
var body = "<p><b>Email From:</b> {0} ({1})</p><p><b>Subject:</b> {2} </p><p><b>Software Description:</b></p><p>{4}</p><p><b>Message:</b></p><p>{3}</p>";
message.To.Add(new MailAddress("email@mydomain.com")); // replace with valid value
message.From = new MailAddress("email@randomdomain.com"); // replace with valid value
message.Subject = "(Inquire for SELLING)";
message.Body = string.Format(body, model.FromName, model.FromEmail, model.FromSubject, model.Message, model.Desc);
message.IsBodyHtml = true;
return message;
}
public void AppendAttachments(List<string> paths, AttachmentCollection attachments)
{
foreach (var path in paths)
{
var fileInfo = new FileInfo(path);
var memoryStream = new MemoryStream();
using (var stream = fileInfo.OpenRead())
{
stream.CopyTo(memoryStream);
}
memoryStream.Position = 0;
string fileName = fileInfo.Name;
attachments.Add(new Attachment(memoryStream, fileName));
}
}