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我一直在尝试使用 WebClient 发布登录表单的数据，但是无论我做什么，我都会不断收到 417 Expect 错误。我试过“ServicePointManager.Expect100Continue = false;” 它什么也没做。我开始怀疑这可能是我的代码中的错误，但我不知道它是什么。

    public void initiateCredits(string user, string pass)
    {
        System.Net.WebClient wc2 = new System.Net.WebClient();
        string webData = wc2.DownloadString("http://localhost");
        Regex check = new Regex("(?<=You have)(.*)(?=credits)", RegexOptions.Singleline);
        bool checkmatch = check.IsMatch(webData);
        if (checkmatch == true)
        {
            return;
        }
        else
        {
            ServicePointManager.Expect100Continue = false;

            DisableClickSounds();
            string url = "http://localhost";
            string pass_d = Base64.decode(pass);
            string postData = String.Format("username=" + user + "&password=" + pass_d);
            byte[] Post = Encoding.UTF8.GetBytes(postData);
            WebClient wc = new WebClient();
            byte[] response = wc.UploadValues(url, new NameValueCollection()
   {
       { "username", user },
       { "password", pass_d }
   });
            creditlogin = true;

            //string AdditionalHeaders = "Content-Type: application/x-www-form-urlencoded";
            //wb.Navigate(url, null, Post, AdditionalHeaders);
        }

有谁知道为什么我似乎无法删除这些标题，或者为什么我收到此错误？谢谢！

4

1 回答 1

2

将此行添加到您的应用程序配置文件配置部分 - 在我的情况下，只有这可以防止发送“期望：”标头：

<system.net>
    <settings>
        <servicePointManager expect100Continue="false" />
    </settings>
</system.net>
于 2013-12-02T14:49:27.930 回答