WP8简单的计算器

 <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel 包含应用程序的名称和页标题-->
        <StackPanel Grid.Row="" Margin="12,17,0,28">
            <TextBlock Text="我的应用程序" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock Text="页面名称" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - 在此处放置其他内容-->
        <Grid x:Name="ContentPanel" Grid.Row="" Margin="12,0,12,0">

        </Grid>
        <Grid x:Name="MyGrid" HorizontalAlignment="Left" Height="" Margin="7,0,0,0" Grid.Row="" VerticalAlignment="Top" Width="">
            <TextBlock x:Name="InputInformation" HorizontalAlignment="Left" Height="" TextWrapping="Wrap" VerticalAlignment="Top" Width="" FlowDirection="LeftToRight" TextAlignment="Right"/>
            <TextBlock x:Name="OperationResult" HorizontalAlignment="Left" Height="" Margin="0,73,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="" FlowDirection="LeftToRight" TextAlignment="Right"/>
            <Button x:Name="B0" Content="" HorizontalAlignment="Left" Height="" Margin="19,487,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="Result" Content="=" HorizontalAlignment="Left" Height="" Margin="119,487,0,0" VerticalAlignment="Top" Width="" Click="ResultJG"/>
            <Button x:Name="Del" Content="Del" HorizontalAlignment="Left" Height="" Margin="221,487,0,0" VerticalAlignment="Top" Width="" Click="Delclick"/>
            <Button x:Name="Divide" Content="/" HorizontalAlignment="Left" Height="" Margin="321,487,0,0" VerticalAlignment="Top" Width="" RenderTransformOrigin="0.5,0.5" Click="YunSuan"/>
            <Button x:Name="B1" Content="" HorizontalAlignment="Left" Height="" Margin="19,393,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="B2" Content="" HorizontalAlignment="Left" Height="" Margin="119,393,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="B3" Content="" HorizontalAlignment="Left" Height="" Margin="221,393,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="Multiply" Content="*" HorizontalAlignment="Left" Height="" Margin="321,393,0,0" VerticalAlignment="Top" Width="" RenderTransformOrigin="0.5,0.5" Click="YunSuan"/>
            <Button x:Name="B4" Content="" HorizontalAlignment="Left" Height="" Margin="19,299,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="B5" Content="" HorizontalAlignment="Left" Height="" Margin="119,299,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="B6" Content="" HorizontalAlignment="Left" Height="" Margin="221,299,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="Minus" Content="-" HorizontalAlignment="Left" Height="" Margin="321,299,0,0" VerticalAlignment="Top" Width="" RenderTransformOrigin="0.5,0.5"  Click="YunSuan"/>
            <Button x:Name="B7" Content="" HorizontalAlignment="Left" Height="" Margin="19,205,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="B8" Content="" HorizontalAlignment="Left" Height="" Margin="119,205,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="B9" Content="" HorizontalAlignment="Left" Height="" Margin="221,205,0,0" VerticalAlignment="Top" Width="" Click="Btn_ButClick"/>
            <Button x:Name="Plus" Content="+" HorizontalAlignment="Left" Height="" Margin="321,205,0,0" VerticalAlignment="Top" Width="" RenderTransformOrigin="0.5,0.5" Click="YunSuan"/>
        </Grid>
    </Grid>

namespace PhoneApp1
{
    public partial class Calculator : PhoneApplicationPage
    {
        public string Operation = "";//记录一下之前一次按下的运算符
        public double Num = ;//结果
        public Calculator()
        {
            InitializeComponent();
        }

        private void Btn_ButClick(object sender, RoutedEventArgs e)
        {
            if (Operation == "=")
            {
                OperationResult.Text = "";
                InputInformation.Text = "";
                Num = ;
            }
            string s = (sender as Button).Content.ToString();
            OperationResult.Text = OperationResult.Text + s;
            InputInformation.Text = InputInformation.Text + s;
        }

        private void YunSuan(object sender, RoutedEventArgs e)
        {
          string fh=  (sender as Button).Content.ToString();
          OperationNum(fh);
          InputInformation.Text = InputInformation.Text + fh;
          OperationResult.Text = "" ;
        }

        private void OperationNum(string fh)
        {
            if (OperationResult.Text != "")
            {

                if (Operation == "+")
                {
                    Num = Num +double.Parse( OperationResult.Text.ToString());
                    Operation = fh;
                }
                else if (Operation == "-")
                {
                    Num = Num - double.Parse(OperationResult.Text.ToString());
                    Operation = fh;
                }
                else if (Operation == "*")
                {
                    Num = Num * double.Parse(OperationResult.Text.ToString());
                    Operation = fh;
                }
                else if (Operation == "/")
                {
                    if (double.Parse(OperationResult.Text.ToString()) != )
                        Num = Num / double.Parse(OperationResult.Text.ToString());
                    else
                        Num = ;
                    Operation = fh;
                }
                else//(Operation=="" || Operation="=")
                {
                    Num = double.Parse(OperationResult.Text.ToString());
                    Operation = fh;
                }
            }
        }

        private void ResultJG(object sender, RoutedEventArgs e)
        {
            OperationNum("=");
            OperationResult.Text = Num.ToString();
        }

        private void Delclick(object sender, RoutedEventArgs e)
        {
             OperationResult.Text ="";
             InputInformation.Text = "";
             Num = ;
        }
    }
}