C# Post 模擬表單提交

xue001發表於2023-10-28
C#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
/// <summary>
/// 向指定的URL地址發起一個POST請求。
/// </summary>
/// <param name="url">要請求的URL地址</param>
/// <param name="keyvalues">要上傳的資料項</param>
/// <returns>伺服器的返回結果</returns>
public  static  string  FormdataPost( string  url, Dictionary< string ,  string > keyvalues,  string  Authorization)
{
     System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
 
     if  ( string .IsNullOrEmpty(url))
         throw  new  ArgumentNullException( "url" );
 
     HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
     request.Method =  "POST" ;
     request.KeepAlive =  true ;
     request.Headers.Add( "Authorization" , Authorization); //token
 
     string  boundary =  "---------------------------"  + Guid.NewGuid().ToString( "N" );
 
     byte [] boundaryBytes = Encoding.ASCII.GetBytes( "\r\n--"  + boundary +  "\r\n" );
 
 
     request.ContentType =  "multipart/form-data; boundary="  + boundary;
 
 
     Stream stream = request.GetRequestStream();
 
     byte [] beginBoundaryBytes = Encoding.UTF8.GetBytes( "--"  + boundary +  "\r\n" );
     byte [] endBoundaryBytes = Encoding.UTF8.GetBytes( "\r\n--"  + boundary +  "--\r\n" );
 
     //寫入引數
     if  (keyvalues !=  null )
     {
         string  formDataTemplate =  "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n"  +
                "{1}\r\n" ;
 
         foreach  ( string  key  in  keyvalues.Keys)
         {
             string  formItem =  string .Format(formDataTemplate, key, keyvalues[key]);
             byte [] formItemBytes = Encoding.UTF8.GetBytes(formItem);
 
             stream.Write(beginBoundaryBytes, 0, beginBoundaryBytes.Length);  // 1.1 寫入FormData項的開始邊界符
             stream.Write(formItemBytes, 0, formItemBytes.Length);    // 1.2 將鍵值對寫入FormData項中
         }
     }
 
     boundaryBytes = Encoding.ASCII.GetBytes( "\r\n--"  + boundary +  "--\r\n" );
     stream.Write(boundaryBytes, 0, boundaryBytes.Length);
 
     stream.Close();
 
     using  (WebResponse response = request.GetResponse())
     {
         using  (StreamReader reader =  new  StreamReader(response.GetResponseStream(), Encoding.UTF8))
         {
             return  reader.ReadToEnd();
         }
     }
}

　　可以用


來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/70034822/viewspace-2991655/，如需轉載，請註明出處，否則將追究法律責任。

相關文章