用WebClient来POST数据的有关问题

用WebClient来POST数据的问题
比如代码
client.UploadStringAsync(uri, "id=aaaaaaa");

其中client就是一个WebClient对象
问题是。。。。。在uri所指定的web页面，可以取到 id=evsegxvds 这整个字符串，但却不能以Request.Form["id"]的方式取得aaaaaaa
怎么解决这个问题？

[解决办法]
你这是get方式吧！
第二个参数直接传值吧！把ID写到第一个参数去试试！
[解决办法]
下面的代码是我读SLExtension看到的，应该对你有帮助：

C# code

 /// <summary>    /// Method extensions for SLExtension framework    /// </summary>    public static class SLExtension    { ....         #region WebClient        /// <summary>        /// Sends an HTML form. The request is sent using POST method        /// </summary>        /// <param name="webclient">The webclient.</param>        /// <param name="uri">The URI of the resource to receive the file. </param>        /// <param name="data">The form data to upload.</param>        public static void SendHtmlForm(this WebClient webclient, Uri uri, IEnumerable<KeyValuePair<string, string>> data)        {            StringBuilder dataBuilder = new StringBuilder();            int cnt = 0;            foreach (var item in data)            {                if (cnt > 0)                {                    dataBuilder.Append('&');                }                 dataBuilder.Append(item.Key);                dataBuilder.Append('=');                dataBuilder.Append(HttpUtility.UrlEncode(item.Value));            }             webclient.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";            webclient.UploadStringAsync(uri, dataBuilder.ToString());        }         /// <summary>        /// Sends an HTML form. The request is sent using POST method        /// </summary>        /// <param name="webclient">The webclient.</param>        /// <param name="uri">The URI of the resource to receive the file. </param>        /// <param name="data">The form data to upload.</param>        /// <param name="userToken">user state</param>        public static void SendHtmlForm(this WebClient webclient, Uri uri, IEnumerable<KeyValuePair<string, string>> data, object userToken)        {            StringBuilder dataBuilder = new StringBuilder();            int cnt = 0;            foreach (var item in data)            {                if (cnt > 0)                {                    dataBuilder.Append('&');                }                 dataBuilder.Append(item.Key);                dataBuilder.Append('=');                dataBuilder.Append(HttpUtility.UrlEncode(item.Value));            }             webclient.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";            webclient.UploadStringAsync(uri, "POST", dataBuilder.ToString(), userToken);        }         #endregion WebClient        #endregion Public Methods    }
[解决办法]
WebClient.UploadStringAsync 方法 (Uri, String, String, Object)
參數
address
型別：System.Uri
要接收檔案之資源的 URI。 對於 HTTP 資源而言，這個 URI 必須識別出可以接受使用 POST 方法傳送之要求的資源，例如指令碼或 ASP 網頁。

method
型別：System.String
傳送檔案給資源所使用的 HTTP 方法。 如果為 null，則 HTTP 的預設值為 POST。

data
型別：System.String
要上載的字串。

userToken
型別：System.Object
使用者定義的物件，這個物件會在非同步作業完成時傳遞至叫用的方法。

[解决办法]