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使用C Sharp中的Windows窗体通过编程方式发布窗体

FosterZ · 技术社区 · 14 年前

是否可以将一些数据从基于窗口的应用程序发布到Web服务器?让我们务实点

ASCIIEncoding encodedText = new ASCIIEncoding();
string postData = string.Format("txtUserID={0}&txtPassword={1}", txtUName.Text, txtPassword.Text);
byte[] data = encodedText.GetBytes(postData);
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create("http://www.aimlifes.com/office/Login.aspx");
webRequest.Method = "POST";
webRequest.ContentType = "text/html";
webRequest.ContentLength = data.Length;
Stream strm = webRequest.GetRequestStream();
strm.Write(data, 0, data.Length);

txtUrlData.Text = GetPageHtml("http://www.aimlifes.com/office/ReceiveRecharge.aspx");

strm.Close();

GetPageHTML函数:

public string  GetPageHtml(String Url)
{
  WebClient wbc = new WebClient();
  return new System.Text.UTF8Encoding().GetString(wbc.DownloadData(Url));
}

我尝试的是使用给定的凭证登录xyz.com网站,并在文本区域中获取HTML数据。 GetPageHtml() 函数fetch是HTML数据。但主要问题是发布登录详细信息不起作用,我的意思是无法登录xyz.com。

2 回复 | 直到 14 年前

Darin Dimitrov 14 年前

如果站点使用cookie来添加经过身份验证的用户,您可以尝试以下操作:

public class CookieAwareWebClient : WebClient
{
    public CookieAwareWebClient ()
    {
        CookieContainer = new CookieContainer();
    }

    public CookieContainer CookieContainer { get; set; }

    protected override WebRequest GetWebRequest(Uri address)
    {
        var request = base.GetWebRequest(address);
        ((HttpWebRequest)request).CookieContainer = CookieContainer;
        return request;
    }
}

public class Program
{
    static void Main()
    {
        using (var client = new CookieAwareWebClient())
        {
            var values = new NameValueCollection
            {
                { "txtUserID", "foo" },
                { "txtPassword", "secret" }
            };
            // Authenticate. As we are using a cookie container
            // the user will be authenticated on the next requests
            // using this client
            client.UploadValues("http://www.aimlifes.com/office/Login.aspx", values);

            // The user is now authenticated:
            var result = client.DownloadString("http://www.aimlifes.com/office/ReceiveRecharge.aspx");
            Console.WriteLine(result);
        }
    }
}