使用WebClient POST查询字符串

时间:2013-07-07 18:25:42

标签: c# webclient

我想使用WebClient执行QueryString但使用POST方法

这就是我到目前为止所得到的

CODE:

using (var client = new WebClient())
{
    client.QueryString.Add("somedata", "value");
    client.DownloadString("uri");
}

它正在运行,但不幸的是它使用GET而不是POST,我希望它使用POST的原因是我正在进行网络报废,这就是我在WireShark中看到的请求。 [它使用POST作为一种方法但不仅仅是查询字符的后期数据。]

2 个答案:

答案 0 :(得分:1)

这对您有帮助,请使用WebRequest代替WebClient

using System;
using System.Net;
using System.Threading;
using System.IO;
using System.Text;
class ThreadTest
{
    static void Main()
    {
        WebRequest req = WebRequest.Create("http://www.yourDomain.com/search");

        req.Proxy = null;
        req.Method = "POST";
        req.ContentType = "application/x-www-form-urlencoded";

        string reqString = "searchtextbox=webclient&searchmode=simple"; 
        byte[] reqData = Encoding.UTF8.GetBytes(reqString); 
        req.ContentLength = reqData.Length;

        using (Stream reqStream = req.GetRequestStream())
            reqStream.Write(reqData, 0, reqData.Length);

        using (WebResponse res = req.GetResponse())
        using (Stream resSteam = res.GetResponseStream())
        using (StreamReader sr = new StreamReader(resSteam)) 
            File.WriteAllText("SearchResults.html", sr.ReadToEnd());

        System.Diagnostics.Process.Start("SearchResults.html");

    }

}

答案 1 :(得分:1)

回答您的具体问题:

client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
byte[] response = client.UploadData("your url", "POST", new byte[] { });
//get the response as a string and do something with it...
string s = System.Text.Encoding.Default.GetString(response);

但是使用WebClient可以是PITA,因为它不接受cookie,也不允许你设置超时。