很多時(shí)候，我們對(duì)用戶的操作或輸入做一定程度的限制，以避免發(fā)生不必要的異?；蝈e(cuò)誤，因此，對(duì)一些特殊的類型，進(jìn)行輸入限制是很有必要的。

通改變屏幕鍵盤(pán)的顯示模式可以規(guī)范和告訴用戶， 這里應(yīng)該輸入什么。

要做到這些并不復(fù)雜，只要用到一個(gè)類就足矣—— InputScope，它有一個(gè)Names屬性，包含InputScopeName列表，而InputScopeName的NameValue是一個(gè)枚舉值，說(shuō)到底，顯示什么樣的屏幕鍵盤(pán)就取決于該枚舉值。

非常多的內(nèi)容，至少每個(gè)枚舉項(xiàng)表示什么，就沒(méi)有必要一一說(shuō)明，大家參考SDK文檔就可以了。

上面是理論部分，是不是這么神呢，下面我們用實(shí)踐來(lái)證明吧。

啟動(dòng)你的VS，然后新建一個(gè)Silverlight for Windows Phone應(yīng)用項(xiàng)目。

界面很簡(jiǎn)單，隨便放幾個(gè)TextBox，我們只做幾個(gè)典型的應(yīng)用就行了，因?yàn)樵矶际且粯拥摹１热鐢?shù)字，日期，時(shí)間，Email地址等。

<phone:PhoneApplicationPage  
    x:Class="InputScpSample.MainPage" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone" 
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone" 
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768" 
    FontFamily="{StaticResource PhoneFontFamilyNormal}" 
    FontSize="{StaticResource PhoneFontSizeNormal}" 
    Foreground="{StaticResource PhoneForegroundBrush}" 
    SupportedOrientations="Portrait" Orientation="Portrait" 
    shell:SystemTray.IsVisible="True" xmlns:my="clr-namespace:System;assembly=mscorlib"> 
    <phone:PhoneApplicationPage.Resources> 
        <my:Double x:Key="fontSize">32</my:Double> 
    </phone:PhoneApplicationPage.Resources> 
    <!--LayoutRoot 是包含所有頁(yè)面內(nèi)容的根網(wǎng)格--> 
    <Grid x:Name="LayoutRoot" Background="Transparent"> 
        <Grid.RowDefinitions> 
            <RowDefinition Height="Auto"/> 
            <RowDefinition Height="*"/> 
        </Grid.RowDefinitions> 
        <!--TitlePanel 包含應(yīng)用程序的名稱和頁(yè)標(biāo)題--> 
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28"> 
            <TextBlock x:Name="ApplicationTitle" Text="我的應(yīng)用程序" Style="{StaticResource PhoneTextNormalStyle}"/> 
            <TextBlock x:Name="PageTitle" Text="規(guī)范輸入" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/> 
        </StackPanel> 
 
        <!--ContentPanel - 在此處放置其他內(nèi)容--> 
        <ScrollViewer x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0" 
                      HorizontalScrollBarVisibility="Auto" 
                      VerticalScrollBarVisibility="Auto"> 
            <StackPanel> 
                <TextBlock Text="輸入Email地址：" FontSize="{StaticResource fontSize}" /> 
                <TextBox Name="txtEmail" FontSize="{StaticResource fontSize}" HorizontalAlignment="Stretch"> 
                    <TextBox.InputScope> 
                        <InputScope> 
                            <InputScope.Names> 
                                <InputScopeName NameValue="EmailNameOrAddress"/> 
                            </InputScope.Names> 
                        </InputScope> 
                    </TextBox.InputScope> 
                </TextBox> 
                <TextBlock Text="輸入數(shù)字：" Margin="0,15,0,0" FontSize="{StaticResource fontSize}" /> 
                <TextBox Name="txtNumber" FontSize="{StaticResource fontSize}" HorizontalAlignment="Stretch"> 
                    <TextBox.InputScope> 
                        <InputScope> 
                            <InputScope.Names> 
                                <InputScopeName NameValue="Number"/> 
                            </InputScope.Names> 
                        </InputScope> 
                    </TextBox.InputScope> 
                </TextBox> 
                <TextBlock Text="輸入時(shí)間：" Margin="0,15,0,0" FontSize="{StaticResource fontSize}" /> 
                <TextBox Name="txtTime" FontSize="{StaticResource fontSize}" HorizontalAlignment="Stretch"> 
                    <TextBox.InputScope> 
                        <InputScope> 
                            <InputScope.Names> 
                                <InputScopeName NameValue="Time"/> 
                            </InputScope.Names> 
                        </InputScope> 
                    </TextBox.InputScope> 
                </TextBox> 
                <TextBlock Text="輸入人民幣：" Margin="0,15,0,0" FontSize="{StaticResource fontSize}" /> 
                <TextBox Name="txtRMB" FontSize="{StaticResource fontSize}" HorizontalAlignment="Stretch"> 
                    <TextBox.InputScope> 
                        <InputScope> 
                            <InputScope.Names> 
                                <InputScopeName NameValue="CurrencyChinese"/> 
                            </InputScope.Names> 
                        </InputScope> 
                    </TextBox.InputScope> 
                </TextBox> 
               <TextBlock Text="輸入電話號(hào)碼：" Margin="0,15,0,0" FontSize="{StaticResource fontSize}" /> 
                <TextBox Name="txtPhoneNum" FontSize="{StaticResource fontSize}" HorizontalAlignment="Stretch"> 
                    <TextBox.InputScope> 
                        <InputScope> 
                            <InputScope.Names> 
                                <InputScopeName NameValue="TelephoneNumber"/> 
                            </InputScope.Names> 
                        </InputScope> 
                    </TextBox.InputScope> 
                </TextBox> 
                <TextBlock Text="輸入U(xiǎn)RL：" Margin="0,15,0,0" FontSize="{StaticResource fontSize}" /> 
                <TextBox Name="txtURL" FontSize="{StaticResource fontSize}" HorizontalAlignment="Stretch"> 
                    <TextBox.InputScope> 
                        <InputScope> 
                            <InputScope.Names> 
                                <InputScopeName NameValue="Url"/> 
                            </InputScope.Names> 
                        </InputScope> 
                    </TextBox.InputScope> 
                </TextBox> 
 
                <TextBlock Text="輸入單個(gè)字符：" Margin="0,15,0,0" FontSize="{StaticResource fontSize}" /> 
                <TextBox Name="txtChat" FontSize="{StaticResource fontSize}" HorizontalAlignment="Stretch"> 
                    <TextBox.InputScope> 
                        <InputScope> 
                            <InputScope.Names> 
                                <InputScopeName NameValue="Chat"/> 
                            </InputScope.Names> 
                        </InputScope> 
                    </TextBox.InputScope> 
                </TextBox> 
 
            </StackPanel> 
        </ScrollViewer> 
    </Grid> 
    <!--演示 ApplicationBar 用法的示例代碼--> 
    <!--<phone:PhoneApplicationPage.ApplicationBar> 
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True"> 
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="按鈕 1"/> 
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="按鈕 2"/> 
            <shell:ApplicationBar.MenuItems> 
                <shell:ApplicationBarMenuItem Text="菜單項(xiàng) 1"/> 
                <shell:ApplicationBarMenuItem Text="菜單項(xiàng) 2"/> 
            </shell:ApplicationBar.MenuItems> 
        </shell:ApplicationBar> 
    </phone:PhoneApplicationPage.ApplicationBar>--> 
</phone:PhoneApplicationPage> 

當(dāng)然了，這種限制并不能十分準(zhǔn)確，所以在你應(yīng)用程序中，確認(rèn)的時(shí)候也應(yīng)當(dāng)對(duì)特定的數(shù)據(jù)類型進(jìn)行多一次驗(yàn)證。