<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 = ;

        }

    }

}