说三道四技术文摘-感悟人生的经典句子
说三道四 > 文档快照

C#上传文件到WEB服务器

HTML文档下载 WORD文档下载 PDF文档下载
我们可以使用WebClient和HttpWebRequest上传文件。

 

一、使用WebClient

WebClient类提供了UploadFile()和UploadData()方法。两者不同之处在于UploadFile()上传指定文件名的文件。

UploadData()上传二进制数据,数据以字节数组存在,例如:

 

UploadFile例子

 

WebClient  Client = new WebClient();Client.UploadFile("http://www.csharpfriends.com/Members/index.aspx",      "c:\wesiteFiles\newfile.aspx");

UploadData例子

 

byte [] image;//这里省略将图像数据读入byte数组的代码。//.....WebClient  Client = new WebClient();client.UploadData("http://www.csharpfriends.com/Members/images/logocc.jpg", image);

 

 

 

二、使用HttpWebRequest

 

 

private void UploadFilesToRemoteUrl(string url, string[] files, string logpath){  long length = 0;  string boundary = "----------------------------" +  DateTime.Now.Ticks.ToString("x");  HttpWebRequest httpWebRequest2 = (HttpWebRequest)WebRequest.Create(url);  httpWebRequest2.ContentType = "multipart/form-data; boundary=" + boundary;  httpWebRequest2.Method = "POST";  httpWebRequest2.KeepAlive = true;  httpWebRequest2.Credentials = System.Net.CredentialCache.DefaultCredentials;  Stream memStream = new System.IO.MemoryStream();  byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");  memStream.Write(boundarybytes,0,boundarybytes.Leng th);  length += boundarybytes.Length;  string headerTemplate = "Content-Disposition: form-data; name=\"{0}\";  filename=\"{1}\"\r\n Content-Type: application/octet-stream\r\n\r\n";  for(int i=0;i<files.Length;i++)  {    string header = string.Format(headerTemplate,"file"+i,files[i]);    byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);    memStream.Write(headerbytes,0,headerbytes.Length);    length += headerbytes.Length;    FileStream fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read);    byte[] buffer = new byte[1024];    int bytesRead = 0;    while ( (bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0 )    {       memStream.Write(buffer, 0, bytesRead);       length += bytesRead;    }   memStream.Write(boundarybytes,0,boundarybytes.Leng th);   length += boundarybytes.Length;   fileStream.Close();   }   httpWebRequest2.ContentLength = memStream.Length;   Stream requestStream = httpWebRequest2.GetRequestStream();   memStream.Position = 0;   byte[] tempBuffer = new byte[memStream.Length];   memStream.Read(tempBuffer,0,tempBuffer.Length);   memStream.Close();   requestStream.Write(tempBuffer,0,tempBuffer.Length);   requestStream.Close();   WebResponse webResponse2 = httpWebRequest2.GetResponse();   Stream stream2 = webResponse2.GetResponseStream();   StreamReader reader2 = new StreamReader(stream2);   MessageBox.Show(reader2.ReadToEnd());   webResponse2.Close();   httpWebRequest2 = null;   webResponse2 = null;}

 

 

 

备案号:鲁ICP备13029499号-2 说三道四 www.s3d4.cn 说三道四技术文摘