Question

我正在尝试编写一个C＃应用程序，它可以自动发送用户ID，密码和登录（提交“登录”按钮）到网站（例如http://abc.com）并获取在Httprequest中返回的数据。我怎么做？我在坚持......感谢您的推荐！：d

Answer 1

我使用这些功能......
首先，你可以传递一个带有param名称和param值的数组，第二个你可以传递整个字符串请记住，如果在没有javascript代码的情况下执行POST，则可以正常工作（它会返回您可以随意解析的HTML页面）...所以请仔细查看网页源代码。

public static string HttpPost(string url, object[] postData, string saveTo = "")
{
    StringBuilder post = new StringBuilder();
    for (int i = 0; i < postData.Length; i += 2)
        post.Append(string.Format("{0}{1}={2}", i == 0 ? "" : "&", postData[i], postData[i + 1]));
    return HttpPost(url, post.ToString(), saveTo);
}
public static string HttpPost(string url, string postData, string saveTo = "")
{
    postData = postData.Replace("\r\n", "");
    try
    {
        WebRequest req = WebRequest.Create(url);
        byte[] send = Encoding.Default.GetBytes(postData);
        req.Method = "POST";
        req.ContentType = "application/x-www-form-urlencoded";
        //req.ContentType = "text/xml;charset=\"utf-8\"";
        req.ContentLength = send.Length;

        Stream sout = req.GetRequestStream();
        sout.Write(send, 0, send.Length);
        sout.Flush();
        sout.Close();

        WebResponse res = req.GetResponse();
        StreamReader sr = new StreamReader(res.GetResponseStream());
        string returnvalue = sr.ReadToEnd();
        if (!string.IsNullOrEmpty(saveTo))
            File.WriteAllText(saveTo, returnvalue);

        //Debug.WriteLine("{0}\n{1}", postData, returnvalue);
        return returnvalue;
    }
    catch (Exception ex)
    {
        Debug.WriteLine("POST Error on {0}\n  {1}", url, ex.Message);
        return "";
    }
}

提交Web表单并获取C＃中的响应数据

1 个答案: