C# 使用 SmtpClient 时如何保存电子邮件而不是发送？
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How can I save an email instead of sending when using SmtpClient?
提问by user17510
I am using SmtpClient to send an email with an attachment. However for a certain batch we need to somehow save the MailMessage instead of sending them. We are then thinking/hoping to manually upload the messages to the users drafts folder.
我正在使用 SmtpClient 发送带有附件的电子邮件。但是对于某个批次，我们需要以某种方式保存 MailMessage 而不是发送它们。然后我们考虑/希望手动将消息上传到用户草稿文件夹。
Is it possible to save these messages with the attachment intact (impossible, I would have thought). Or alternatively upload the messages to a folder in the users account?
是否可以在附件完整的情况下保存这些消息（我原以为不可能）。或者将消息上传到用户帐户中的文件夹？
If anyone has any experience of this, I'd much appreciate a bit of help or a pointer.
如果有人对此有任何经验，我将非常感谢您的帮助或指点。
采纳答案by Leah
When testing in ASP.NET we save our emails to a folder rather then send them through an email server. Maybe you could change yourweb.configsettings like this for your batch?
在 ASP.NET 中进行测试时，我们将电子邮件保存到一个文件夹中，而不是通过电子邮件服务器发送它们。也许您可以web.config为您的批次更改这样的设置？
<system.net>
<mailSettings>
<smtp deliveryMethod="SpecifiedPickupDirectory">
<specifiedPickupDirectory pickupDirectoryLocation="c:\Temp\mail\"/>
</smtp>
</mailSettings>
</system.net>
Additional Info:
附加信息：
回答by dotjoe
You can configure this with the system.netsetting in your web.config/ app.configfile.
您可以使用/文件中的system.net设置进行配置。web.configapp.config
<system.net>
<mailSettings>
<smtp deliveryMethod="Network">
<network host="mail.mydomain.com" port="25" />
</smtp>
<!-- Use this setting for development
<smtp deliveryMethod="SpecifiedPickupDirectory">
<specifiedPickupDirectory pickupDirectoryLocation="C:\Temp" />
</smtp>
-->
</mailSettings>
</system.net>
Also, here's a link with info on migrating from System.Web.Mailto System.Net.Mail.
此外，这里有一个链接，其中包含有关从 迁移System.Web.Mail到 的信息System.Net.Mail。
回答by Avram
This can help - Adding Save() functionality to Microsoft.Net.Mail.MailMessage
The main ideia, make an extension to MailMessage ,that by reflection making a save method.
这可以提供帮助 -将 Save() 功能添加到 Microsoft.Net.Mail.MailMessage
主要思想是对 MailMessage 进行扩展，即通过反射制作保存方法。
回答by Chris S
As well as the SpecifiedPickupDirectoryinformation of the other answers, if you want to ensure your emails are sent to a folder relative to the site root - handy in testing on build servers where you don't know the paths - you can add a quick check in your email sending code:
以及SpecifiedPickupDirectory其他答案的信息，如果您想确保您的电子邮件发送到相对于站点根目录的文件夹 - 在您不知道路径的构建服务器上进行测试时很方便 - 您可以添加快速签入您的电子邮件发送代码：
SmtpClient client = new SmtpClient();
...
// Add "~" support for pickupdirectories.
if (client.DeliveryMethod == SmtpDeliveryMethod.SpecifiedPickupDirectory && client.PickupDirectoryLocation.StartsWith("~"))
{
string root = AppDomain.CurrentDomain.BaseDirectory;
string pickupRoot = client.PickupDirectoryLocation.Replace("~/", root);
pickupRoot = pickupRoot.Replace("/",@"\");
client.PickupDirectoryLocation = pickupRoot;
}
And your tests will look something like this (make sure you use App_Data so IIS can write to the folder):
你的测试看起来像这样（确保你使用 App_Data 以便 IIS 可以写入文件夹）：
// Arrange - get SitePath from AppDomain.Current.BaseDirectory + ..\
string pickupPath = Path.Combine(SitePath, "App_Data", "TempSmtp");
if (!Directory.Exists(pickupPath))
Directory.CreateDirectory(pickupPath);
foreach (string file in Directory.GetFiles(pickupPath, "*.eml"))
{
File.Delete(file);
}
// Act (send some emails)
// Assert
Assert.That(Directory.GetFiles(pickupPath, "*.eml").Count(), Is.EqualTo(1));
回答by devjin
A bug also requires adding as a workaround in some versions of the framework. So the completed version looks like:
在某些版本的框架中还需要添加一个错误作为解决方法。所以完成的版本看起来像：
<system.net>
<mailSettings>
<smtp deliveryMethod="SpecifiedPickupDirectory">
<specifiedPickupDirectory pickupDirectoryLocation="c:\Temp\mail\"/>
<network host="localhost" />
</smtp>
</mailSettings>
</system.net>
