C#使用HttpWebRequest和HttpWebResponse上传文件示例

标签：open   void   int   on()   web   com   []   derby   上传文件   转自：http://www.mzwu.com/article.asp?id=3475 程序代码： using System; using System.Collections.Specialized; using System.IO; using System.Net; using System.Text; namespace ConsoleApplication1 { public static class HttpHelper { private static readonly Encoding DEFAULTENCODE = Encoding.UTF8; /// /// HttpUploadFile /// /// /// /// /// public static string HttpUploadFile(string url, string file, NameValueCollection data) { return HttpUploadFile(url, file, data, DEFAULTENCODE); } /// /// HttpUploadFile /// /// /// /// /// /// public static string HttpUploadFile(string url, string file, NameValueCollection data, Encoding encoding) { return HttpUploadFile(url, new string[] { file }, data, encoding); } /// /// HttpUploadFile /// /// /// /// /// public static string HttpUploadFile(string url, string[] files, NameValueCollection data) { return HttpUploadFile(url, files, data, DEFAULTENCODE); } /// /// HttpUploadFile /// /// /// /// /// /// public static string HttpUploadFile(string url, string[] files, NameValueCollection data, Encoding encoding) { 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); request.ContentType = "multipart/form-data; boundary=" + boundary; request.Method = "POST"; request.KeepAlive = true; request.Credentials = CredentialCache.DefaultCredentials; using (Stream stream = request.GetRequestStream()) { //1.1 key/value string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}"; if (data != null) { foreach (string key in data.Keys) { stream.Write(boundarybytes, 0, boundarybytes.Length); string formitem = string.Format(formdataTemplate, key, data[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; for (int i = 0; i