c# - 从 c# 应用程序连接到 .aspx 站点

Question

我正在尝试构建 c# 应用程序，它会在站点中有“更新”时通知我。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（身份验证），如果可能的话，我该怎么做？我寻找了任何指南或有关此内容的内容，但没有找到。

Answer 1

你需要使用这个WebClient类。有关此类的更多信息，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在http://msdn.microsoft.com/en-us/library/system.net.webclient(v=vs.80).aspx?cs-save-lang=1&cs-lang=csharp#code-片段 4

Answer 2

首先，您需要使用 c# 发布表单

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 ();

然后尝试保存 cookie，它需要将 aspnet_session_id 存储到客户端以供将来请求

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！！

我建议您阅读此内容。