如何使用C＃中的WebClient将数据发布到特定URL

6 回答

• 341

  string URI = "http://www.myurl.com/post.php";
  string myParameters = "param1=value1&param2=value2&param3=value3"
  

  可以简化为

  http://www.myurl.com/post.php?param1=value1&param2=value2&param3=value3 .

  这总是有效的 . 我发现原来的一个上下班 .

  回复于 2024-04-29T11:01:27+08:00
• 16

  我刚刚找到解决方案，是的，它比我想象的要容易:)

  所以这是解决方案：

  string URI = "http://www.myurl.com/post.php";
  string myParameters = "param1=value1&param2=value2&param3=value3";
  
  using (WebClient wc = new WebClient())
  {
      wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
      string HtmlResult = wc.UploadString(URI, myParameters);
  }
  

  它像魅力:)

  回复于 2024-04-29T11:01:27+08:00
• 15

  有一个名为UploadValues的内置方法，它可以发送HTTP POST（或任何类型的HTTP方法）并以适当的格式数据格式处理请求体（与"&"连接参数和通过url编码转义字符）的构造：

  using(WebClient client = new WebClient())
  {
      var reqparm = new System.Collections.Specialized.NameValueCollection();
      reqparm.Add("param1", "<any> kinds & of = ? strings");
      reqparm.Add("param2", "escaping is already handled");
      byte[] responsebytes = client.UploadValues("http://localhost", "POST", reqparm);
      string responsebody = Encoding.UTF8.GetString(responsebytes);
  }
  

  回复于 2024-04-29T11:01:27+08:00
• -3

  使用 WebClient.UploadString 或 WebClient.UploadData 可以轻松地将数据发送到服务器 . 我将使用UploadData显示一个示例，因为UploadString的使用方式与DownloadString相同 .

  byte[] bret = client.UploadData("http://www.website.com/post.php", "POST",
                  System.Text.Encoding.ASCII.GetBytes("field1=value1&field2=value2") );
  
              string sret = System.Text.Encoding.ASCII.GetString(bret);
  

  更多：http://www.daveamenta.com/2008-05/c-webclient-usage/

  回复于 2024-04-29T11:01:27+08:00
• 38

  //Making a POST request using WebClient.
  Function()
  {    
    WebClient wc = new WebClient();
  
    var URI = new Uri("http://your_uri_goes_here");
  
    //If any encoding is needed.
    wc.Headers["Content-Type"] = "application/x-www-form-urlencoded";
    //Or any other encoding type.
  
    //If any key needed
  
    wc.Headers["KEY"] = "Your_Key_Goes_Here";
  
    wc.UploadStringCompleted += 
        new UploadStringCompletedEventHandler(wc_UploadStringCompleted);
  
    wc.UploadStringAsync(URI,"POST","Data_To_Be_sent");    
  }
  
  void wc__UploadStringCompleted(object sender, UploadStringCompletedEventArgs e)    
  {  
    try            
    {          
       MessageBox.Show(e.Result); 
       //e.result fetches you the response against your POST request.         
    }
    catch(Exception exc)         
    {             
       MessageBox.Show(exc.ToString());            
    }
  }
  

  回复于 2024-04-29T11:01:27+08:00
• 318

  string URI = "site.com/mail.php";
  using (WebClient client = new WebClient())
  {
      System.Collections.Specialized.NameValueCollection postData = 
          new System.Collections.Specialized.NameValueCollection()
         {
                { "to", emailTo },  
                { "subject", currentSubject },
                { "body", currentBody }
         };
      string pagesource = Encoding.UTF8.GetString(client.UploadValues(URI, postData));
  }
  

  回复于 2024-04-29T11:01:27+08:00