从输入流转换document出错：请检验文档格式。(与nc做自动凭证导入问题)

Question

急！急！！！！大家帮帮忙忙。
<?xml version="1.0" encoding='UTF-8'?>
<ufinterface billtype="" filename="" isexchange="Y" proc="" receiver="" replace="Y" roottag="sendresult" sender="" successful="N">
    <sendresult>
        <billpk>
        </billpk>
        <bdocid>
        </bdocid>
        <filename>
        </filename>
        <resultcode>-31003</resultcode>
        <resultdescription>从输入流转换document出错：请检验文档格式。\n</resultdescription>
        <content></content>
    </sendresult>
</ufinterface>
上面是通过StreamReader.ReadToEnd()写入xml或txt文件后所获得回执信息。
下面是我写的相关代码，哪位大虾帮帮忙忙指点一下（path：xml文件，url：为连接地址字符串）：
            HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(url);
            webrequest.Method = "POST";
            webrequest.ContentType = "application/x-www-form-urlencoded";这里我试过"text/xml"
            webrequest.ContentLength = 1000;
            Stream requestStream = webrequest.GetRequestStream();
------
            FileStream fs = new FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read);
            byte[] filecontent = new byte[1000];
            while (fs.Read(filecontent, 0, 1000) != 0)
            {
                requestStream.Write(filecontent, 0, 1000);
            }
            fs.Close();
            fs.Dispose();  
------这段总觉得有问题，但不能确定
            HttpWebResponse webreponse = (HttpWebResponse)webrequest.GetResponse();
            Stream mystream;
            mystream = webreponse.GetResponseStream();
            string sHtml = new StreamReader(mystream, System.Text.Encoding.UTF8).ReadToEnd();
            StreamWriter swstream = new StreamWriter("c:\\1.txt", false, System.Text.Encoding.Default);
            swstream.Write(sHtml);
            swstream.Close();

Answer 1

你的具体需求是什么？读取这个节点的内容？<resultdescription>从输入流转换document出错：请检验文档格式。\n</resultdescription>

Answer 2

先谢谢你的回复。
我不是为了读这个。我是将一个xml凭证post传出，那一段是出现问题的信息。

Answer 3

            WebRequest request = WebRequest.Create(url);//url 为连接地址
            xmldoc.Load(path);//path为要上传的xml文件
            string postData = HttpUtility.HtmlEncode(xmldoc.InnerXml);                            
            byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";          
            request.ContentLength = byteArray.Length;        
            Stream dataStream = request.GetRequestStream();
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();
            WebResponse response = request.GetResponse();
            dataStream = response.GetResponseStream();                      
            StreamReader reader = new StreamReader(dataStream);                     
            string responseFromServer = reader.ReadToEnd();
            reader.Close(); 
            dataStream.Close(); 
            response.Close();
            StreamWriter swstream = new StreamWriter("c:\\1.txt", false, System.Text.Encoding.Default); 
            swstream.Write(responseFromServer); //将reader.ReadToEnd()返回信息写入1.txt文件中
            swstream.Close();    
   通过上面的代码，执行后，在1.txt文件显示以下信息
<?xml version="1.0" encoding='UTF-8'?>
<ufinterface billtype="" filename="" isexchange="Y" proc="" receiver="" replace="Y" roottag="sendresult" sender="" successful="N">
    <sendresult>
        <billpk>
        </billpk>
        <bdocid>
        </bdocid>
        <filename>
        </filename>
        <resultcode>-31003</resultcode>
        <resultdescription>从输入流转换document出错：请检验文档格式。\n</resultdescription>
        <content></content>
    </sendresult>
</ufinterface>
哪儿为高人指点一下。