GET HTTP状态返回的ObjectDisposedException

Question

我试图获取状态代码HTTP响应返回，就像这样：

try 
{ 
    HttpWebRequest request = WebRequest.Create(requestURI) as HttpWebRequest; 
    string text 

    using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) 
    using (var responseStream = new StreamReader(response.GetResponseStream())) 
    { 
     text = responseStream.ReadToEnd(); 
    } 

    var responseHeader = (HttpWebResponse)request.GetResponse(); 
    var status = responseHeader.StatusCode; 
} 
catch (WebException ex) 
{ 
    MessageBox.Show(ex.ToString()); 
} 

的问题是，我得到这个异常：

System.ObjectDisposedException ：在这一行}

： “ 'System.Net.HttpWebResponse' 无法访问移除对象的名称。”：var status = responseHeader.StatusCode;

为什么这样？我想获取状态码和说明

Answer 1

using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) 

将在离开使用块后配置响应。

因此，另一个电话(HttpWebResponse)request.GetResponse();将抛出异常。此外，因为这是一个网络响应，你不能阅读两次。

试试这个替代方案：

HttpWebRequest request = WebRequest.Create(requestURI) as HttpWebRequest; 
string text; 

HttpStatusCode status; 

using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) 
using (var responseStream = new StreamReader(response.GetResponseStream())) 
{ 
    text = responseStream.ReadToEnd(); 
    status = response.StatusCode; 
}