建立一個(gè)Silverlight項(xiàng)目，添加一個(gè)子窗口ChildWindow1.xaml.

在子窗口設(shè)計(jì)中添加一個(gè)輸入框：<TextBox x:Name="txtUserInfor" Grid.Row="0" />
添加子窗體的CS代碼：

 string testString;

        public string TestString
        {
            get { return testString; }
            set { testString = value; }
        }

增加一個(gè)事件： public event EventHandler OkClicked;
修改OKButton_Click方法：

        private void OKButton_Click(object sender, RoutedEventArgs e)
        {
            if (OkClicked != null)
            {
                TestString = txtUserInfor.Text;
                OkClicked(this,new EventArgs());
            }

            this.DialogResult = true;
        }

子窗口修改完畢。

父窗體：
設(shè)計(jì)中添加一個(gè)輸入框和一個(gè)Button：

<TextBox x:Name="tbInfo" Width="100" Height="50"></TextBox>
 <Button Click="Button_Click" Width="100" Height="60" Content="子窗口測(cè)試" HorizontalAlignment="Right"></Button>

 修改父窗體代碼：

   public FatherControl()
        {
            InitializeComponent();
            childWindowDemo.OkClicked += new EventHandler(childWindowDemo_OkClicked);
        }

        void childWindowDemo_OkClicked(object sender, EventArgs e)
        {
            tbInfo.Text = childWindowDemo.TestString;
        }

        private ChildWindow1 childWindowDemo = new ChildWindow1();

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            childWindowDemo.Show();
        }
完畢。
運(yùn)行，點(diǎn)擊父窗體按鈕，彈出子窗體。在子窗體的輸入框中輸入內(nèi)容，點(diǎn)擊確認(rèn)后關(guān)閉子窗體，同時(shí)子窗體的數(shù)據(jù)更新到父窗體的輸入框中。