使用默认的ASP.NET MVC模板时HTML无法正确插入电子邮件

Html not getting correctly inserted into email when using the default asp.net mvc template

使用默认的mvc代码在注册时确认电子邮件地址，但是发送电子邮件时不会显示html。
enter

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string code = await UserManager.GenerateEmailConfirmationTokenAsync(user.Id);
var callbackUrl = Url.Action("ConfirmEmail","Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
await UserManager.SendEmailAsync(user.Id,"Confirm your account","Please confirm your account by clicking <a href="" +
callbackUrl +"">here");

发送电子邮件异步：

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public Task SendAsync(IdentityMessage message)
{

// Plug in your email service here to send an email.
SmtpClient client = new SmtpClient();
return client.SendMailAsync("email here",
message.Destination,
message.Subject,
message.Body);
return Task.FromResult(0);
}

浏览SO上的其他一些问题时，我略微更改了发送代码，以便可以将正文设置为允许html，但是我仍然遇到相同的问题

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public Task SendAsync(IdentityMessage message)
{
MailMessage msg = new MailMessage();
msg.IsBodyHtml = true;
msg.Body = message.Body;
// Plug in your email service here to send an email.
SmtpClient client = new SmtpClient();
return client.SendMailAsync("email here",
message.Destination,
message.Subject,
msg.Body);
return Task.FromResult(0);
}

为什么会这样？

TIA

相关讨论

该问题更有可能取决于您当前使用的电子邮件服务/ API内容。如果SendEmailAsync方法仍以纯文本而不是HTML格式发送确认电子邮件，则可以将确认URL与正文消息一起嵌入，并让用户的邮件客户端将其自动转换为如下所示的链接：

1	await UserManager.SendEmailAsync(user.Id,"Confirm your account","Please confirm your account by clicking here:" + callbackUrl);

发送电子邮件正文为HTML的另一种方法是在SendAsync方法中将IsBodyHtml属性设置为true，如下所示：

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public class EmailService : IIdentityMessageService
{
// other stuff

public async Task SendAsync(IdentityMessage message)
{
var msg = new MailMessage();
msg.Subject = message.Subject;
msg.Body = message.Body;
msg.IsBodyHtml = true;

msg.To.Add(message.Destination);

// Plug in your email service here to send an email.
using (var client = new SmtpClient())
{
await client.SendMailAsync(msg);
}

// other stuff
}

// other stuff
}

注意：确保包含SendAsync方法的IdentityConfig.cs文件在项目的App_Start目录中可用(请参见此完整示例)。