当我使用 ASP.Net MVC 3.0 中的 HttpStatusCodeResult 返回带有换行符的 StatusDescription 时，与我的客户端的连接被强制关闭。应用程序托管在 IIS 7.0 中。
示例控制器：
public class FooController : Controller
{
public ActionResult MyAction()
{
return new HttpStatusCodeResult((int)HttpStatusCode.BadRequest, "Foo \n Bar");
}
}
示例客户端：
using (WebClient client = new WebClient())
{
client.DownloadString("http://localhost/app/Foo/MyAction");
}
抛出异常：
System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive.
System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
使用 curl (curl 7.25.0 (i386-pc-win32) libcurl/7.25.0 zlib/1.2.6) 时的行为是一致的
curl http://localhost/app/Foo/MyAction
curl：（56）接收失败：连接已重置
编辑
我最终使用此自定义 ActionResult 来获得所需的结果。
public class BadRequestResult : ActionResult
{
private const int BadRequestCode = (int)HttpStatusCode.BadRequest;
private int count = 0;
public BadRequestResult(string errors)
: this(errors, "")
{
}
public BadRequestResult(string format, params object[] args)
{
if (String.IsNullOrEmpty(format))
{
throw new ArgumentException("format");
}
Errors = String.Format(format, args);
count = Errors.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries).Length;
}
public string Errors { get; private set; }
public override void ExecuteResult(ControllerContext context)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
HttpResponseBase response = context.HttpContext.Response;
response.TrySkipIisCustomErrors = true;
response.StatusCode = BadRequestCode;
response.StatusDescription = String.Format("Bad Request {0} Error(s)", count);
response.Write(Errors);
response.End();
}
}