C#如何调用php网站的api接口

[GragonBoy]

如下为文档的一部分
1、接口地址URL地址为网痁URL+api.php 如 www.abc.com/api.php
2、接入方式：POST
3、接入类型：系统调用
4、接口方法一：
[/img]
5、验证机制，签名验证
串联需要POST的值+ 中心会话密钥进行Md5(编码为32位位长)编码构成了相应的校验码，记入POST[‘ac’]中和相应的POST值一起传送到服务器.
如:
系统参数：$token 中心会话密钥
业务数据：
$_POST[‘username’]=’user’ $_POST[‘password’]=’password’
Ksort($_POST);(以数据的Key作为健对数据进行升序排列)
$verify=’’;
foreach($_POST as $key=>$value){
$verify.= $value;
}
则:$_POST[‘ac’]=md5($verify. $token);　

请教各位大侠如何调用这个接口

[宝_爸]

下面代码来自
http://www.jigar.net/howdoi/viewhtmlcontent106.aspx


poststring 是要post的数据

void PostMe(object sender, EventArgs e){
    string poststring = String.Format("field1={0}&field2={1}",text1.Text,text2.Text);
    ResponseResult.Text = "<hr/>" +  
    GetResponseString("http://www.jigar.net/demo/HttpRequestDemoServer.aspx",poststring);
}

String GetResponseString(string url, string poststring){
    HttpWebRequest httpRequest = 
    (HttpWebRequest)WebRequest.Create("http://www.jigar.net/demo/HttpRequestDemoServer.aspx"); 
    
    httpRequest.Method = "POST"; 
    httpRequest.ContentType = "application/x-www-form-urlencoded"; 

    byte[] bytedata =  Encoding.UTF8.GetBytes(poststring);
    httpRequest.ContentLength = bytedata.Length;

    Stream requestStream = httpRequest.GetRequestStream();
    requestStream.Write(bytedata, 0, bytedata.Length);
    requestStream.Close();


    HttpWebResponse httpWebResponse = 
    (HttpWebResponse)httpRequest.GetResponse();
    Stream responseStream =  httpWebResponse.GetResponseStream();

    StringBuilder sb = new StringBuilder();

    using (StreamReader reader = 
    new StreamReader(responseStream, System.Text.Encoding.UTF8))
    {
      string line;
      while ((line = reader.ReadLine()) != null)
      {
        sb.Append(line);
      }
    }

    return sb.ToString();

}

[GragonBoy]

还有没有其他答案呀?