几乎所有的业务系统都有弹出窗口，典型场景有二种 ：

1、简单的弹出一个对话框显示信息，比如下面这样：

这个很简单，代码示例如下：

DialogParameters pars = new DialogParameters();            pars.Header = "信息";pars.Content = "Hello World";RadWindow.Alert(pars);

2、点击某条记录的“编辑”按钮，传入ID参数，弹出一个窗口，编辑保存后，将操作结果返回给父窗口

这种场景下，要求:

a)弹出窗口能接受到父窗口传过来的参数

b)弹出窗口关闭时，父窗口要能区分出是通过什么操作关闭的(比如：是直接点击右上角的X按钮关的，还是点击“提交”按钮关的，或是点击“取消”按钮关的)

c)弹出窗关闭后，父窗口要能知道操作结果

示例代码如下:

弹出窗口Xaml部分：

             
              
                   
                    
                    
                    
                    
                    
                    
                    
                    
                
               
                   
                    
                
                       
       
        用户名：
               
               
       
        密码：
               
               
       
        重复密码：
               
               
       
        生日：
               
               
       
        电子邮件：
               
               
       
        电话号码：
               
               
       
        手机号码：
               
               
               
                
                
           
      
     

弹出窗口Xaml.cs部分

using System;using System.Collections.Generic;using System.Windows;using Telerik.Windows.Controls;namespace Telerik.Sample{    public partial class PopWinUserReg : RadWindow    {        public PopWinUserReg()        {            InitializeComponent();            this.Loaded += new RoutedEventHandler(PopWinUserReg_Loaded);        }        void PopWinUserReg_Loaded(object sender, RoutedEventArgs e)        {            Dictionary
     
       dicPars = this.Tag as Dictionary
      
       ;            if (dicPars != null)             {                string id = dicPars["id"].ToString();                RadWindow.Alert("传入参数为：" + id);            }        }        private void btnCancel_Click(object sender, RoutedEventArgs e)        {            this.DialogResult = false;            this.Close();        }        private void btnSubmit_Click(object sender, RoutedEventArgs e)        {            this.DialogResult = true;            this.Tag = "回传给父窗口的值在这里!";            this.Close();        }    }}
      
     

父窗口Xaml.cs部分：

using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using Telerik.Windows.Controls;namespace Telerik.Sample{    public partial class FormInput : UserControl    {        PopWinUserReg win=null;        Dictionary
     
       dicPars = new Dictionary
      
       ();        public FormInput()        {            InitializeComponent();            this.Loaded += new RoutedEventHandler(FormInput_Loaded);            this.Unloaded += new RoutedEventHandler(FormInput_Unloaded);        }        void FormInput_Loaded(object sender, RoutedEventArgs e)        {            win = new PopWinUserReg();            win.Loaded += new RoutedEventHandler(win_Loaded);            win.Closed += new EventHandler
       
        (win_Closed);        }        void win_Closed(object sender, Windows.Controls.WindowClosedEventArgs e)        {            if (!e.DialogResult.HasValue)             {                RadWindow.Alert("直接关闭了弹出窗口！");            }            else if (e.DialogResult.Value)            {                string result = win.Tag.ToString();                RadWindow.Alert("点击“提交”关闭的，传回来的值为：" + result);            }            else             {                RadWindow.Alert("点击“取消”关闭的！");            }                                }        void win_Loaded(object sender, RoutedEventArgs e)        {            RadWindow.Alert("弹出窗口加载完成!");        }        void FormInput_Unloaded(object sender, RoutedEventArgs e)        {            if (win != null)             {                win.Close();                win = null;            }        }        private void btnReg_Click(object sender, RoutedEventArgs e)        {            #region 传参数到弹出窗口的Tag            string PARAM_ID = "id";            if (dicPars.ContainsKey(PARAM_ID))             {                dicPars.Remove(PARAM_ID);            }            dicPars.Add(PARAM_ID, 1);            win.Tag = dicPars;            #endregion            win.ShowDialog();        }    }}