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  • delegate Callback委托

        public class RK_URLReqeust
        {

    public delegate void Callback(string response);

    Callback callback;

    public string Response { get; private set; }

            public RK_URLReqeust(string url, Callback callback)
            {
                // Initialize members
                this.url = url;
                this.callback = callback;
                //State = URLRequestState.Idle;
            }

                Response = streamReader.ReadToEnd();//from server or from xml or from json get data

                // Call the response callback
                if (callback != null)
                {
                    callback(Response);
                }

      }

    调用

            private void OnClickGet(object sender, RoutedEventArgs e)
            {
                RK_URLReqeust rk = new RK_URLReqeust("http://www.baidu.com", new RK_URLReqeust.Callback(UploadPic_CallBack));
            }
            private void UploadPic_CallBack(string response)
            {
                Dispatcher.BeginInvoke(() =>
                {
                    MessageBox.Show(response);
                });
            }

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  • 原文地址:https://www.cnblogs.com/androllen/p/2783929.html
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