Windows Phone 7 自定义弹出窗口

    Windows Phone内置的MessageBox弹出窗口局限性太大，不能满足各种个性化的弹出窗口的需求，即使使用第三方的控件库也会有一些局限性，又或者封装的东西太多了，那么这时候就需要自己去根据自己的需求去自定义一个弹出窗口了。

     大概的原理就是使用Popup控件来实现弹出窗的效果，Popup控件可以把包含在其中的控件显示在最外面，从而可以把当前页面的控件都给盖住了，再加点半透明的效果，若隐若现的，一个弹窗就出来了。好吧，下面来看一下Demo。

     先看一下demo的结构。

Generic.xaml

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:MessageControl;assembly=MessageControl"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"   
    mc:Ignorable="d"
    >
    <Style TargetType="local:MyMessage">
        <Setter Property="FontFamily" Value="{StaticResource PhoneFontFamilyNormal}"/>
        <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeNormal}"/>
        <Setter Property="Foreground" Value="{StaticResource PhoneForegroundBrush}"/>
        <Setter Property="Background" Value="Snow"/>
        <Setter Property="Width" Value="480" />
        <Setter Property="Height" Value="800" />
        <!--定义模板的Template-->
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="local:MyMessage">
                    <Grid VerticalAlignment="Stretch">
                        <Rectangle x:Name="backgroundRect" Grid.Row="0" Fill="Black" Opacity="0.7"/>
                        <Border 
                            VerticalAlignment="Top" 
                            BorderThickness="3" 
                            BorderBrush="Black">
                            <StackPanel Margin="0">
                                <ContentPresenter x:Name="body"/>
                            </StackPanel>
                        </Border>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>

using System.Windows;
using System.Windows.Controls;
using System.Windows.Shapes;
using System.Windows.Controls.Primitives;
using Microsoft.Phone.Controls;

namespace MessageControl
{
    public class MyMessage : ContentControl
    {
        private System.Windows.Controls.ContentPresenter body;
        private System.Windows.Shapes.Rectangle backgroundRect;
        private object content;

        public MyMessage()
        {
            //这将类的styleKey设置为MyMessage,这样在模板中的style才能通过TargetType="local:MyMessage"与之相互绑定
            this.DefaultStyleKey = typeof(MyMessage);
        }
        //重写OnApplyTemplate()方法获取模板样式的子控件
        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            this.body = this.GetTemplateChild("body") as ContentPresenter;
            this.backgroundRect = this.GetTemplateChild("backgroundRect") as Rectangle;
            InitializeMessagePrompt();
        }
        //使用Popup控件来制作弹窗
        internal Popup ChildWindowPopup
        {
            get;
            private set;
        }
        //获取当前应用程序的UI框架PhoneApplicationFrame
        private static PhoneApplicationFrame RootVisual
        {
            get
            {
                return Application.Current == null ? null : Application.Current.RootVisual as PhoneApplicationFrame;
            }
        }
        //弹窗的内容，定义为object，可以赋值为各种各样的控件
        public object MessageContent
        {
            get
            {
                return this.content;
            }
            set
            {
                this.content = value;
            }
        }
        //隐藏弹窗
        public void Hide()
        {
            if (this.body != null)
            {
                //关闭Popup控件
                this.ChildWindowPopup.IsOpen = false;
            }
        }
        //判断弹窗是否打开
        public bool IsOpen 
        {
            get 
            {
                return ChildWindowPopup != null && ChildWindowPopup.IsOpen;
            } 
        }
        //打开弹窗
        public void Show()
        {
            if (this.ChildWindowPopup == null)
            {
                this.ChildWindowPopup = new Popup();
                this.ChildWindowPopup.Child = this;
            }

            if (this.ChildWindowPopup != null && Application.Current.RootVisual != null)
            {
                InitializeMessagePrompt();
                this.ChildWindowPopup.IsOpen = true;
            }
        }
        //初始化弹窗
        private void InitializeMessagePrompt()
        {
            if (this.body == null)
                return;
            this.backgroundRect.Visibility = System.Windows.Visibility.Visible;
            //把模板中得body控件内容赋值为你传过来的控件
            this.body.Content = MessageContent;
            this.Height = 800;
        }
    }
}

简单地创建有一个控件作为弹窗的内容，测试一下弹窗的效果，当然弹窗的控件你可以定义为你想要的各种内容。

WindowsPhoneControl1.xaml

<UserControl x:Class="TestMessageControl.WindowsPhoneControl1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    d:DesignHeight="250" d:DesignWidth="480">
    
    <Grid x:Name="LayoutRoot" Background="LightBlue">
        <Button Content="是" Height="72" HorizontalAlignment="Left" Margin="40,169,0,0" Name="button1" VerticalAlignment="Top" Width="160" />
        <Button Content="关闭" Height="72" HorizontalAlignment="Left" Margin="254,169,0,0" Name="button2" VerticalAlignment="Top" Width="160" Click="button2_Click" />
        <TextBlock Height="53" HorizontalAlignment="Left" Margin="54,72,0,0" Name="textBlock1" Text="《深入浅出Windows Phone 7应用开发》" VerticalAlignment="Top" Width="369" />
    </Grid>
</UserControl>

using System.Windows;
using System.Windows.Controls;

namespace TestMessageControl
{
    public partial class WindowsPhoneControl1 : UserControl
    {
        public WindowsPhoneControl1()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, RoutedEventArgs e)
        {
            (App.Current as App).myMessage.Hide();
        }
    }
}

在App.xaml.cs中定义为全局弹窗

namespace TestMessageControl
{
    public partial class App : Application
    {
        ……

        public MyMessage myMessage = new MyMessage { MessageContent = new WindowsPhoneControl1() };
        ……
    }
}

MainPage.xaml.cs

单击事件

using Microsoft.Phone.Controls;
using MessageControl;

namespace TestMessageControl
{
    public partial class MainPage : PhoneApplicationPage
    {

        public MainPage()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            (App.Current as App).myMessage.Show();
        }
    }
}

好了，来看一下运行的效果吧。

欢迎购买我的书籍《深入浅出Windows Phone 7应用开发》 感谢大家的支持！！

http://product.dangdang.com/product.aspx?product_id=22624989