底层连接关闭:发送时发生意外错误

本文关键字：意外 错误 连接 | 更新日期: 2023-09-27 18:16:42

我正在异步使用HttpWebRequest类，如下面的代码所示(这只是windows应用程序):

    private void StartWebRequest(string url)
    {           
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.BeginGetResponse(new AsyncCallback(FinishWebRequest), request);          
    }
    private void FinishWebRequest(IAsyncResult result)
    {
            HttpWebResponse response = (result.AsyncState as HttpWebRequest).EndGetResponse(result) as HttpWebResponse;
            Stream responseStream = response.GetResponseStream();
            int num = 100000;
            byte[] buffer = new byte[num];
            int offset = 0;
            while ((num2 = responseStream.Read(buffer, offset, 1000)) != 0)
            {
                offset += num2;
            }
            MemoryStream stream = new MemoryStream(buffer, 0, offset);
            Bitmap bitmap = (Bitmap)Image.FromStream(stream);
            bitmap.Save(@"z:'new.jpg");
            response.Close();
            responseStream.Close();
            stream.Close();
    }

有时会出现这样的错误:

The underlying connection was closed : An unexpected error occured on a send

有办法解决这个问题吗?

底层连接关闭:发送时发生意外错误

您必须将代码放入try和catch块中，如果捕获到错误，则尝试再次重新连接。您可以预先定义试验次数的配额(例如最多尝试3次)，网络环境是不可预测的，因此您必须保持任何不可靠性。顺便说一句，在最后的测试之后，不要忘记关闭流和连接

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