Silverlight计算器

Silverlight版的计算器，功能全面

1.PaperTrail.cs

  /// <summary>
    /// 输入框处理类
    /// </summary>
    public class PaperTrail
    {
        string args;

        private TextBox PaperBox;

        public PaperTrail()
        {

        }

        public PaperTrail(TextBox paperBox)
        {
            PaperBox = paperBox;
        }

        public void AddArguments(string a)
        {
            args = a;
        }

        public void AddResult(string r)
        {
            PaperBox.Text += args + " = " + r + "\n";
            PaperBox.IsEnabled = false;
        }

        public void Clear()
        {
            PaperBox.Text = args = string.Empty;
        }

    }

    public class Operations
    {
        private static Operation _BPlus = new Operation("BPlus");
        public static Operation BPlus()
        {
            return _BPlus;
     

   public class Operation
    {
        // constructor logic
        public Operation(string name)
        {
            this.Name = name;
        }
        // Name
        private string _name;
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }

    }

前台

<UserControl x:Class="CalculatorProject.MainPage"
    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"
    d:DesignHeight="300" d:DesignWidth="400" Width="600" Height="400">

    <Border Height="366" Width="586" BorderBrush="#FF384452" BorderThickness="0,0,0,0" Background="Green">
        <Grid Name="MyGrid">
            <Grid.Resources>
                <Style x:Key="DigitBtn" TargetType="Button" >
                    <Setter Property="FontSize" Value="14" />
                    <Setter Property="Margin" Value="5" />
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="Button" xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows">
                                <Grid>
                                    <vsm:VisualStateManager.VisualStateGroups>
                                        <vsm:VisualStateGroup x:Name="CommonStates">
                                            <vsm:VisualState x:Name="Normal"/>
                                            <vsm:VisualState x:Name="MouseOver">
                                                <Storyboard>
                                                    <ColorAnimation Duration="0" Storyboard.TargetName="TB" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" To="#FF8DDDF1"/>
                                                </Storyboard>
                                            </vsm:VisualState>
                                            <vsm:VisualState x:Name="Pressed">
                                                <Storyboard>
                                                    <ColorAnimation Duration="0" Storyboard.TargetName="TB" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)" To="#FF6DBDD1"/>
                                                </Storyboard>
                                            </vsm:VisualState>
                                            <vsm:VisualState x:Name="Disabled">
                                                <Storyboard>
                                                    <DoubleAnimation Duration="0" Storyboard.TargetName="DisabledVisualElement" Storyboard.TargetProperty="Opacity" To=".55"/>
                                                </Storyboard>
                                            </vsm:VisualState>
                                        </vsm:VisualStateGroup>
                                        <vsm:VisualStateGroup x:Name="FocusStates">
                                            <vsm:VisualState x:Name="Focused" />
                                            <vsm:VisualState x:Name="Unfocused" />
                                        </vsm:VisualStateGroup>
                                    </vsm:VisualStateManager.VisualStateGroups>
                                    <Rectangle x:Name="TB" Fill="{TemplateBinding Background}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" RadiusX="6" RadiusY="6" />
                                    <ContentPresenter Content="{TemplateBinding Content}" HorizontalAlignment="Center" VerticalAlignment="Center" />
                                    <Rectangle x:Name="DisabledVisualElement" RadiusX="3" RadiusY="3" Fill="#FFFFFFFF" Opacity="0" IsHitTestVisible="false" />
                                </Grid>

                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </Grid.Resources>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
                <ColumnDefinition />
                <ColumnDefinition />
                <ColumnDefinition />
                <ColumnDefinition />
                <ColumnDefinition />
                <ColumnDefinition />
                <ColumnDefinition />
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition />
                <RowDefinition />
                <RowDefinition />
                <RowDefinition />
                <RowDefinition />
                <RowDefinition />
            </Grid.RowDefinitions>
            <Button Name="B7" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="4" Grid.Row="2" Content="7" />
            <Button Name="B8" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="5" Grid.Row="2" Content="8" />
            <Button Name="B9" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="6" Grid.Row="2" Content="9" />
            <Button Name="B4" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="4" Grid.Row="3" Content="4" />
            <Button Name="B5" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="5" Grid.Row="3" Content="5" />
            <Button Name="B6" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="6" Grid.Row="3" Content="6" />
            <Button Name="B1" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="4" Grid.Row="4" Content="1" />
            <Button Name="B2" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="5" Grid.Row="4" Content="2" />
            <Button Name="B3" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="6" Grid.Row="4" Content="3" />
            <Button Name="B0" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="4" Grid.Row="5" Content="0" />
            <Button Name="BPeriod" Click="DigitBtn_Click" Background="Lightgray" Style="{StaticResource DigitBtn}" Grid.Column="5" Grid.Row="5" Content="."/>
            <Button Name="BPM" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="6" Grid.Row="5" Content="+/-"/>
            <Button Name="BDevide" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="7" Grid.Row="2" Content="/"/>
            <Button Name="BMultiply" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="7" Grid.Row="3" Content="*"/>
            <Button Name="BMinus" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="7" Grid.Row="4" Content="-"/>
            <Button Name="BPlus" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="7" Grid.Row="5" Content="+"/>
            <Button Name="BSqrt" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="8" Grid.Row="2" Content="Sqrt"/>
            <Button Name="BPercent" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="8" Grid.Row="4" Content="%"/>
            <Button Name="BOneOver" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="8" Grid.Row="3" Content="1/X"/>
            <Button Name="BEqual" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="8" Grid.Row="5" Content="="/>
            <Button Name="BC" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="8" Grid.Row="1" Grid.ColumnSpan="1" Content="C"/>
            <Button Name="BCE" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="7" Grid.Row="1" Grid.ColumnSpan="1" Content="CE"/>
            <Button Name="BMemClear" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="3" Grid.Row="2" Content="MC"/>
            <Button Name="BMemRecall" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="3" Grid.Row="3" Content="MR"/>
            <Button Name="BMemSave" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="3" Grid.Row="4" Content="MS"/>
            <Button Name="BMemPlus" Click="OperBtn_Click" Background="Darkgray" Style="{StaticResource DigitBtn}" Grid.Column="3" Grid.Row="5" Content="M+"/>
            <TextBlock Name="BMemBox" Grid.Column="3" Grid.Row="1" Margin="10,17,10,17" Grid.ColumnSpan="2">Memory: [empty]</TextBlock>
        </Grid>
    </Border>

</UserControl>

 

后台

  public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();

            DisplayBox = new TextBox();
            Grid.SetRow(DisplayBox, 0);
            Grid.SetColumn(DisplayBox, 0);
            Grid.SetColumnSpan(DisplayBox, 9);
            DisplayBox.Height = 36;
            DisplayBox.FontSize = 18;
            DisplayBox.TextAlignment = TextAlignment.Right;
            DisplayBox.FontWeight = FontWeights.Bold;
            MyGrid.Children.Add(DisplayBox);

            PaperBox = new TextBox();
            Grid.SetRow(PaperBox, 500);
            Grid.SetColumn(PaperBox, 0);
            Grid.SetColumnSpan(PaperBox, 3);
            Grid.SetRowSpan(PaperBox, 5);
            PaperBox.IsReadOnly = true;
            PaperBox.VerticalScrollBarVisibility = ScrollBarVisibility.Visible;
            PaperBox.Margin = new Thickness(3.0, 1.0, 1.0, 1.0);
            PaperBox.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;

            Paper = new PaperTrail(PaperBox);

            MyGrid.Children.Add(PaperBox);
            ProcessKey('0');
            EraseDisplay = true;
        }

        private TextBox DisplayBox;
        private TextBox PaperBox;
        private PaperTrail Paper;

        /// <summary>
        /// 操作类型
        /// </summary>
        private enum Operation
        {
            None,
            Devide,
            Multiply,
            Subtract,
            Add,
            Percent,
            Sqrt,
            OneX,
            Negate
        }
        private Operation LastOper;
        private string _display;
        private string _last_val;
        private string _mem_val;
        private bool _erasediplay;

        //标识当前值
        private bool EraseDisplay
        {
            get
            {
                return _erasediplay;

            }
            set
            {
                _erasediplay = value;
            }
        }
        //获取或设置记忆的值
        private Double Memory
        {
            get
            {
                if (_mem_val == string.Empty)
                    return 0.0;
                else
                    return Convert.ToDouble(_mem_val);
            }
            set
            {
                _mem_val = value.ToString();
            }
        }
        //最后输入的值
        private string LastValue
        {
            get
            {
                if (_last_val == string.Empty)
                    return "0";
                return _last_val;

            }
            set
            {
                _last_val = value;
            }
        }
        //当前显示字符串
        private string Display
        {
            get
            {
                return _display;
            }
            set
            {
                _display = value;
            }
        }

        private void OnWindowKeyDown(object sender, System.Windows.Input.KeyEventArgs e)
        {
            string s = e.Key.ToString();
            char c = (s.ToCharArray())[0];
            e.Handled = true;

            if ((c >= '0' && c <= '9') || c == '.' || c == '\b')  // '\b' is backspace
            {
                ProcessKey(c);
                return;
            }
            switch (c)
            {
                case '+':

                    ProcessOperation("BPlus");
                    break;
                case '-':
                    ProcessOperation("BMinus");
                    break;
                case '*':
                    ProcessOperation("BMultiply");
                    break;
                case '/':
                    ProcessOperation("BDevide");
                    break;
                case '%':
                    ProcessOperation("BPercent");
                    break;
                case '=':
                    ProcessOperation("BEqual");
                    break;
            }

        }
        private void DigitBtn_Click(object sender, RoutedEventArgs e)
        {
            string s = ((Button)sender).Content.ToString();
            char[] ids = s.ToCharArray();
            ProcessKey(ids[0]);

        }
        private void ProcessKey(char c)
        {
            if (EraseDisplay)
            {
                Display = string.Empty;
                EraseDisplay = false;
            }
            AddToDisplay(c);
        }
        private void ProcessOperation(string s)
        {
            Double d = 0.0;
            switch (s)
            {
                case "BPM":
                    LastOper = Operation.Negate;
                    LastValue = Display;
                    CalcResults();
                    LastValue = Display;
                    EraseDisplay = true;
                    LastOper = Operation.None;
                    break;
                case "BDevide":

                    if (EraseDisplay)
                    {
                        LastOper = Operation.Devide;
                        break;
                    }
                    CalcResults();
                    LastOper = Operation.Devide;
                    LastValue = Display;
                    EraseDisplay = true;
                    break;
                case "BMultiply":
                    if (EraseDisplay)
                    {
                        LastOper = Operation.Multiply;
                        break;
                    }
                    CalcResults();
                    LastOper = Operation.Multiply;
                    LastValue = Display;
                    EraseDisplay = true;
                    break;
                case "BMinus":
                    if (EraseDisplay)
                    {
                        LastOper = Operation.Subtract;
                        break;
                    }
                    CalcResults();
                    LastOper = Operation.Subtract;
                    LastValue = Display;
                    EraseDisplay = true;
                    break;
                case "BPlus":
                    if (EraseDisplay)
                    {
                        LastOper = Operation.Add;
                        break;
                    }
                    CalcResults();
                    LastOper = Operation.Add;
                    LastValue = Display;
                    EraseDisplay = true;
                    break;
                case "BEqual":
                    if (EraseDisplay)
                        break;
                    CalcResults();
                    EraseDisplay = true;
                    LastOper = Operation.None;
                    LastValue = Display;
                    break;
                case "BSqrt":
                    LastOper = Operation.Sqrt;
                    LastValue = Display;
                    CalcResults();
                    LastValue = Display;
                    EraseDisplay = true;
                    LastOper = Operation.None;
                    break;
                case "BPercent":
                    if (EraseDisplay)
                    {
                        LastOper = Operation.Percent;
                        break;
                    }
                    CalcResults();
                    LastOper = Operation.Percent;
                    LastValue = Display;
                    EraseDisplay = true;

                    break;
                case "BOneOver":
                    LastOper = Operation.OneX;
                    LastValue = Display;
                    CalcResults();
                    LastValue = Display;
                    EraseDisplay = true;
                    LastOper = Operation.None;
                    break;
                case "BC":
                    LastOper = Operation.None;
                    Display = LastValue = string.Empty;
                    Paper.Clear();
                    UpdateDisplay();
                    break;
                case "BCE":
                    LastOper = Operation.None;
                    Display = LastValue;
                    UpdateDisplay();
                    break;
                case "BMemClear":
                    Memory = 0.0F;
                    DisplayMemory();
                    break;
                case "BMemSave":
                    Memory = Convert.ToDouble(Display);
                    DisplayMemory();
                    EraseDisplay = true;
                    break;
                case "BMemRecall":
                    Display = Memory.ToString();
                    UpdateDisplay();
                    EraseDisplay = false;
                    break;
                case "BMemPlus":
                    d = Memory + Convert.ToDouble(Display);
                    Memory = d;
                    DisplayMemory();
                    EraseDisplay = true;
                    break;
            }

        }

        private void OperBtn_Click(object sender, RoutedEventArgs e)
        {
            ProcessOperation(((Button)sender).Name.ToString());
        }

        private double Calc(Operation LastOper)
        {
            double d = 0.0;

            try
            {
                switch (LastOper)
                {
                    case Operation.Devide:
                        Paper.AddArguments(LastValue + " / " + Display);
                        d = (Convert.ToDouble(LastValue) / Convert.ToDouble(Display));
                        CheckResult(d);
                        Paper.AddResult(d.ToString());
                        break;
                    case Operation.Add:
                        Paper.AddArguments(LastValue + " + " + Display);
                        d = Convert.ToDouble(LastValue) + Convert.ToDouble(Display);
                        CheckResult(d);
                        Paper.AddResult(d.ToString());
                        break;
                    case Operation.Multiply:
                        Paper.AddArguments(LastValue + " * " + Display);
                        d = Convert.ToDouble(LastValue) * Convert.ToDouble(Display);
                        CheckResult(d);
                        Paper.AddResult(d.ToString());
                        break;
                    case Operation.Percent:
                        Paper.AddArguments(LastValue + " % " + Display);
                        d = (Convert.ToDouble(LastValue) * Convert.ToDouble(Display)) / 100.0F;
                        CheckResult(d);
                        Paper.AddResult(d.ToString());
                        break;
                    case Operation.Subtract:
                        Paper.AddArguments(LastValue + " - " + Display);
                        d = Convert.ToDouble(LastValue) - Convert.ToDouble(Display);
                        CheckResult(d);
                        Paper.AddResult(d.ToString());
                        break;
                    case Operation.Sqrt:
                        Paper.AddArguments("Sqrt( " + LastValue + " )");
                        d = Math.Sqrt(Convert.ToDouble(LastValue));
                        CheckResult(d);
                        Paper.AddResult(d.ToString());
                        break;
                    case Operation.OneX:
                        Paper.AddArguments("1 / " + LastValue);
                        d = 1.0F / Convert.ToDouble(LastValue);
                        CheckResult(d);
                        Paper.AddResult(d.ToString());
                        break;
                    case Operation.Negate:
                        d = Convert.ToDouble(LastValue) * (-1.0F);
                        break;
                }
            }
            catch
            {
                d = 0;

                MessageBox.Show("Operation cannot be perfomed");
            }

            return d;
        }
        private void CheckResult(double d)
        {
            if (Double.IsNegativeInfinity(d) || Double.IsPositiveInfinity(d) || Double.IsNaN(d))
                throw new Exception("Illegal value");
        }

        private void DisplayMemory()
        {
            if (_mem_val != String.Empty)
                BMemBox.Text = "Memory: " + _mem_val;
            else
                BMemBox.Text = "Memory: [empty]";
        }
        private void CalcResults()
        {
            double d;
            if (LastOper == Operation.None)
                return;

            d = Calc(LastOper);
            Display = d.ToString();

            UpdateDisplay();
        }

        private void UpdateDisplay()
        {
            if (String.IsNullOrEmpty(Display))
                DisplayBox.Text = "0";
            else
                DisplayBox.Text = Display;
        }
        private void AddToDisplay(char c)
        {
            if (c == '.')
            {
                if (Display.IndexOf('.', 0) >= 0)  //already exists
                    return;
                Display = Display + c;
            }
            else
            {
                if (c >= '0' && c <= '9')
                {
                    Display = Display + c;
                }
                else
                    if (c == '\b')
                    {
                        if (Display.Length <= 1)
                            Display = String.Empty;
                        else
                        {
                            int i = Display.Length;
                            Display = Display.Remove(i - 1, 1);
                        }
                    }

            }

            UpdateDisplay();

        }

    }