从 c# 应用程序连接到 .aspx 站点答案

【问题标题】：Connecting to .aspx site from c# application从 c# 应用程序连接到 .aspx 站点
【发布时间】：2012-11-20 21:28:00
【问题描述】：

我正在尝试构建 c# 应用程序，当站点中有“更新”时它会通知我。站点登录表单包含 3 个文本框，它是 login.aspx。

我的问题是，如何将 3 个详细信息“发送”到站点并从我想用 c# 构建的应用程序连接（验证），如果可能的话，我该怎么做？我查找了任何指南或相关内容，但没有找到。

【问题讨论】：

您需要模拟网络浏览器的行为，例如：身份验证、cookie 和重定向。所以 WebClient 类可以帮助你

标签： c# asp.net login forms-authentication

【解决方案1】：

您需要使用WebClient 类。有关此课程的更多信息，请访问http://msdn.microsoft.com/en-us/library/system.net.webclient(v=vs.80).aspx

还有一个很好的例子http://msdn.microsoft.com/en-us/library/system.net.webclient(v=vs.80).aspx?cs-save-lang=1&cs-lang=csharp#code-snippet-4

【讨论】：

谢谢，但是有一个问题。我知道我需要知道页面发送的参数，但是当我尝试使用嗅探器时，我发现内容被加密为很多字母。怎么能这样？

【解决方案2】：

First you need post a form using c#

HttpWebRequest request = (HttpWebRequest)WebRequest.Create (args[0]);

            // Set some reasonable limits on resources used by this request
            request.MaximumAutomaticRedirections = 4;
            request.MaximumResponseHeadersLength = 4;
            // Set credentials to use for this request.
            request.Credentials = CredentialCache.DefaultCredentials;
            HttpWebResponse response = (HttpWebResponse)request.GetResponse ();

            Console.WriteLine ("Content length is {0}", response.ContentLength);
            Console.WriteLine ("Content type is {0}", response.ContentType);

            // Get the stream associated with the response.
            Stream receiveStream = response.GetResponseStream ();

            // Pipes the stream to a higher level stream reader with the required encoding format. 
            StreamReader readStream = new StreamReader (receiveStream, Encoding.UTF8);

            Console.WriteLine ("Response stream received.");
            Console.WriteLine (readStream.ReadToEnd ());
            response.Close ();
            readStream.Close ();

then try to save cookie, its required to store aspnet_session_id into client for future requests

private class CookieAwareWebClient : WebClient
{
    public CookieAwareWebClient()
        : this(new CookieContainer())
    { }
    public CookieAwareWebClient(CookieContainer c)
    {
        this.CookieContainer = c;
    }
    public CookieContainer CookieContainer { get; set; }

    protected override WebRequest GetWebRequest(Uri address)
    {
        WebRequest request = base.GetWebRequest(address);
        if (request is HttpWebRequest)
        {
            (request as HttpWebRequest).CookieContainer = this.CookieContainer;
        }
        return request;
    }
}

确保在每个请求上发送并恢复 aspnet_session_id。还有宾果游戏！

我建议你阅读this。

【讨论】：