HttpWebRequest调用接口的方法两种写法
1.是不行的
//第一种写法
//Uri url = new Uri(Url);
//byte[] reqbytes = new byte[file.InputStream.Length];// + 1]; // 上传文件字节数组大小
//try
//{
// HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
// req.Method = "POST";
// req.ContentType = "application/octet-stream";//"application/x-www-form-urlencoded";//
// req.ContentLength = reqbytes.Length;
// Stream stm = req.GetRequestStream();
// stm.Write(reqbytes, 0, reqbytes.Length);
// stm.Close();
// HttpWebResponse wr = (HttpWebResponse)req.GetResponse();//获取服务器反馈结果
// Stream stream = wr.GetResponseStream();
// stream.Write(boundarybytes, 0, boundarybytes.Length);
// StreamReader srd = new StreamReader(stream, Encoding.UTF8);
// PageStr += srd.ReadToEnd();//返回的结果，code：-1 msg：系统未接收到文件
// stream.Close();
// srd.Close();
//}
//catch (Exception e)
//{
// PageStr += e.Message;
//}
---------------------2.----下面可行----------------------------------------------------
///
///
///
///
/// NameValueCollection可为空
///
public string PostFile(List
{
string returnValue = "";
string url = "
try
{
var encoding = Encoding.UTF8;
string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
byte[] boundarybytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endbytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
//1.HttpWebRequest
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);//(this._url);
//request.Headers = this._header;
request.ContentType = "multipart/form-data; boundary=" + boundary;
request.Method = "POST";
request.KeepAlive = true;
request.Credentials = CredentialCache.DefaultCredentials;
using (Stream stream = request.GetRequestStream())
{
//1.1 keyalue
string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
if (formDatas != null)
{
foreach (string key in formDatas.Keys)
{
stream.Write(boundarybytes, 0, boundarybytes.Length);
string formitem = string.Format(formdataTemplate, key, formDatas[key]);
byte[] formitembytes = encoding.GetBytes(formitem);
stream.Write(formitembytes, 0, formitembytes.Length);
}
}
//1.2 file
string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: application/octet-stream\r\n\r\n";
byte[] buffer = new byte[4096];
int bytesRead = 0;
foreach (var file in files)
{
stream.Write(boundarybytes, 0, boundarybytes.Length);
string header = string.Format(headerTemplate, file.formKey, file.fileName);
byte[] headerbytes = encoding.GetBytes(header);
stream.Write(headerbytes, 0, headerbytes.Length);
while ((bytesRead = file.fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
stream.Write(buffer, 0, bytesRead);
}
}
//1.3 form end
stream.Write(endbytes, 0, endbytes.Length);
}
//2.WebResponse
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (StreamReader stream = new StreamReader(response.GetResponseStream()))
{
var result = stream.ReadToEnd();
if (string.IsNullOrEmpty(result))
returnValue = result;
//return returnValue ;// HandleResult.Error("无返回数据！");
}
}
catch (Exception ex)
{
;// HandleResult.Error(ex.Message);
}
return returnValue;
}
///
/// 上传文件信息
///
public class UploadFileInfo
{
///
/// Key
///
public string formKey { get; set; }
///
/// 文件名
///
public string fileName { get; set; }
///
/// 文件流
///
public Stream fileStream { get; set; }
-----------------------------------------------------------------------------------------
这个确实复杂，因为往生很多代码看起来没错，但是，就不行。最后这个行了。。。。。服务器那边参数是HttpPostedFileBase----后续再改。
}