Task.IsFaulted无法在我的.Net核心应用程序中工作 [英] Task.IsFaulted is not working in my .Net core application
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问题描述
Task.IsFaulted 没有捕获异常。似乎 IsFault 无法正常工作。即使条件为假，它也会发送到else块。
Task.IsFaulted is not capturing exception. It seems that IsFault is not working. It is sending to else block even the condition is false. Can you please suggest me where I am doing wrong.
public async Task<string> SendEmailAsync(string userid, string fullname, string comment)
{
string contentRootPath = _hostingEnvironment.ContentRootPath;
string json = System.IO.File.ReadAllText("appsettings.json");
JObject obj = JObject.Parse(json);
string email = (string)obj["SendEmailTo"];
string subject = "Feedback by: " + fullname + " (" + userid + ")";
// await _emailSender.SendEmailAsync(contentRootPath, email, subject, comment, userid, fullname);
var result = _emailSender.SendEmailAsync(contentRootPath, email, subject, comment, userid, fullname);
string responseString = "";
if (result.IsFaulted)
{
responseString = @"
<!DOCTYPE html>
<html>
<head>
<meta charset='utf - 8' />
<title>MCP Feedback Facility</title>
</head >
<body >
<br />
<br />
<br />
<p>Sorry, your feedback submission was not completed successfully</p>
</body>
</html>
";
}
else
{
responseString = @"
<!DOCTYPE html>
<html>
<head>
<meta charset='utf - 8' />
<title>MCP Feedback Facility</title>
</head >
<body >
<br />
<br />
<br />
<p>Feedback submitted successfully.</p>
</body>
</html>
";
}
return await Task.FromResult<string>(responseString);
推荐答案
而不是使用 IsFaulted ，只需使用 try / catch ：
Instead of using IsFaulted, just use try/catch:
try
{
await _emailSender.SendEmailAsync(contentRootPath, email, subject, comment, userid, fullname);
return @"
<!DOCTYPE html>
<html>
<head>
<meta charset='utf - 8' />
<title>MCP Feedback Facility</title>
</head >
<body >
<br />
<br />
<br />
<p>Feedback submitted successfully.</p>
</body>
</html>
";
}
catch
{
return @"
<!DOCTYPE html>
<html>
<head>
<meta charset='utf - 8' />
<title>MCP Feedback Facility</title>
</head >
<body >
<br />
<br />
<br />
<p>Sorry, your feedback submission was not completed successfully</p>
</body>
</html>
";
}
旁注： 返回等待Task.FromResult< string>（responseString）; 效率较低且难以维护 return responseString;
Side note: return await Task.FromResult<string>(responseString); is just a less efficient and less maintainable version of return responseString;
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