/// <summary> /// 上传的方法 /// </summary> /// <param name="uploadfile">单个文件名（上传多个文件的方法自己修改）</param> /// <param name="url">post请求的url</param> /// <param name="poststring">post的字符串 键值对，相当于表单上的文本框里的字符</param> /// <returns></returns> public static string UploadFileEx(string uploadfile, string url, NameValueCollection poststring) { Uri uri = new Uri(url);
string boundary = "----------" + DateTime.Now.Ticks.ToString("x"); HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uri); webrequest.ContentType = "multipart/form-data; boundary=" + boundary; webrequest.Method = "POST";
// Build up the post message header StringBuilder sb = new StringBuilder();
//加文本 foreach (string key in poststring.Keys) { sb.Append("--"); sb.Append(boundary); sb.Append("\r\n"); sb.Append("Content-Disposition: form-data; name=\""); sb.Append(key); sb.Append("\""); sb.Append("\r\n"); sb.Append("\r\n"); sb.Append(poststring.Get(key)); sb.Append("\r\n"); }
//加文件 sb.Append("--"); sb.Append(boundary); sb.Append("\r\n"); sb.Append("Content-Disposition: form-data; name=\"filename\";"); sb.Append("filename=\""); sb.Append(Path.GetFileName(uploadfile)); sb.Append("\""); sb.Append("\r\n"); sb.Append("Content-Type: multipart/form-data"); sb.Append("\r\n"); sb.Append("\r\n");
string postHeader = sb.ToString(); byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);
// Build the trailing boundary string as a byte array // ensuring the boundary appears on a line by itself byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
FileStream fileStream = new FileStream(uploadfile, FileMode.Open, FileAccess.Read); long length = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length; webrequest.ContentLength = length;
Stream requestStream = webrequest.GetRequestStream();
// Write out our post header requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
// Write out the file contents byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)fileStream.Length))]; int bytesRead = 0; while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) requestStream.Write(buffer, 0, bytesRead);
// Write out the trailing boundary requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
webrequest.Timeout = 1000000;
//System.Windows.Forms.MessageBox.Show(webrequest.Timeout.ToString());
WebResponse responce = webrequest.GetResponse();
Stream s = responce.GetResponseStream();
StreamReader sr = new StreamReader(s);
string str = sr.ReadToEnd();
fileStream.Close();
requestStream.Close();
sr.Close();
s.Close();
responce.Close();
return str; }
调用：
static void Main(string[] args) {
NameValueCollection poststring = new NameValueCollection();
poststring["username"] = "laokaizzz";//post 的参数 poststring["password"] = "111111111"; string uploadfile;// set to file to upload string uploadfile = @"E:\图片\123.jpg";//上传的文件名
string str = UploadFileEx(uploadfile, "http://localhost:61729/data.aspx", poststring);
}
http数据请求接口 服务端
protected void Page_Load(object sender, EventArgs e) { string username = Request["username"]; for (int i = 0; i < Request.Files.Count; i++) { HttpPostedFile img = Request.Files[i]; string s = img.FileName; }
}
