C#如何使用响应状态代码创建WebException

您需要自定义类以增加HTTP状态代码:

public class HttpWebException : WebException
{
    public int HttpStatusCode { get; set; }        
}

这里最棘手的是 WebException(String, Exception, WebExceptionStatus, WebResponse) 构造函数是免费的 HttpWebResponse HttpWebRequest (有构造函数,但它们已过时)。

所以,自从 WebException 接受摘要 WebResponse 而不是 HttpWebResponse(HttpWeb响应) ,我建议创建一个类 MockHttpWebResponse 或者别的什么。我不知道你确切需要哪些变量,所以我将把你链接到 HttpWebResponse source 以便您从中提取基本变量。

然后在构造函数中使用这个类,如下所示:

new WebException(message, null, WebExceptionStatus.ProtocolError, new MockHttpWebResponse(statusCode))

…或类似的东西。我认为您最清楚您的场景需要什么

您可以使用反射来实现这一点。在下面的示例中,我创建了一个web异常,并调整了响应i(也使用反射)。

HttpWebResponse response = (HttpWebResponse)request.GetResponse();
statusCode = (int)response.StatusCode;
ActivateCallback(responseCallback, response, url, string.Empty);

var fieldStatusCode = response.GetType().GetField("m_StatusCode", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
{
    var statusCodeNew = (HttpStatusCode)403;
    fieldStatusCode.SetValue(response, statusCodeNew);
}


string responceBody = "{\"error\":{\"code\":\"AF429\",\"message\":\"Too many requests. Method=GetContents, PublisherId=00000000-0000-0000-0000-000000000000\"}}";

var propStream = response.GetType().GetField("m_ConnectStream", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);

    System.IO.MemoryStream ms = new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(responceBody));
    //response.ResponseStream = ms;//((System.Net.ConnectStream)(response.ResponseStream))
    propStream.SetValue(response, ms);
    ms.Position = 0;


WebException ex1 = new WebException();
var fieldResponce = ex1.GetType().GetField("m_Response", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
{
    fieldResponce.SetValue(ex1, response);
}
e = null;
throw ex1;