wpf 相关问题

我正在WPF中编写一个简单的计算器程序，并使用Caliburn.Micro MVVM框架。我在XMAL中定义了UI，如下所示我正在WPF中编写一个简单的计算器程序，并使用Caliburn.Micro MVVM框架。我在XMAL中定义了这样的UI <Button Name="Clear" Grid.Row="0" Grid.Column="0" Style="{StaticResource grey_button}" Content="C"/> <Button Grid.Row="0" Grid.Column="1" Style="{StaticResource grey_button}" Content="+/-"/> <Button Name="Remainder" Grid.Row="0" Grid.Column="2" Style="{StaticResource grey_button}" Content="%"/> <Button Name="Division" Grid.Row="0" Grid.Column="3" Style="{StaticResource blue_button}" Content="÷"/> <Button Name="Seven" Grid.Row="1" Grid.Column="0" Style="{StaticResource white_button}" Content="7"/> <Button Name="Eight" Grid.Row="1" Grid.Column="1" Style="{StaticResource white_button}" Content="8"/> <Button Name="Nine" Grid.Row="1" Grid.Column="2" Style="{StaticResource white_button}" Content="9"/> <Button Name="Multiply" Grid.Row="1" Grid.Column="3" Style="{StaticResource blue_button}" Content="x"/> <Button Name="Four" Grid.Row="2" Grid.Column="0" Style="{StaticResource white_button}" Content="4"/> <Button Name="Five" Grid.Row="2" Grid.Column="1" Style="{StaticResource white_button}" Content="5"/> <Button Name="Six" Grid.Row="2" Grid.Column="2" Style="{StaticResource white_button}" Content="6"/> <Button Name="Plus" Grid.Row="2" Grid.Column="3" Style="{StaticResource blue_button}" Content="+"/> <Button Name="One" Grid.Row="3" Grid.Column="0" Style="{StaticResource white_button}" Content="1"> </Button> <Button Name="Two" Grid.Row="3" Grid.Column="1" Style="{StaticResource white_button}" Content="2"/> <Button Name="Three" Grid.Row="3" Grid.Column="2" Style="{StaticResource white_button}" Content="3"/> <Button Name="Subtract" Grid.Row="3" Grid.Column="3" Style="{StaticResource blue_button}" Content="-" FontSize="25"/> <Button Name="Dot" Grid.Row="4" Grid.Column="0" Style="{StaticResource white_button}" Content="·"/> <Button Name="Zero" Grid.Row="4" Grid.Column="1" Style="{StaticResource white_button}" Content="0"/> <Button Name="Backward" Grid.Row="4" Grid.Column="2" Style="{StaticResource white_button}" Content="x"/> <Button Name="Equal" Grid.Row="4" Grid.Column="3" Style="{StaticResource blue_button}" Content="="/> 通过这种方式，我实际上可以处理点击操作，因为 Caliburn 命名 Conversion，因为我在 ViewModel 中定义了 One,Two,Three .... 方法 public void Zero() { Input += "0"; } public void One(string content) { Input += "1"; } public void Two() { Input += "2"; } public void Three() { Input += "3"; } public void Four() { Input += "4"; } 现在我想用一种方法处理所有输入动作 public void Input(string content) { Input+=content; } 所以我在视图顶部将 Microsoft.Xaml.Behaviors 导入为命名空间 b，并在我的按钮之一中定义了以下事件 <Button Name="One" Grid.Row="3" Grid.Column="0" Style="{StaticResource white_button}" Content="1"> <b:Interaction.Triggers> <b:EventTrigger EventName="Click"> <cal:ActionMessage MethodName="One"> <cal:Parameter Value="{Binding ElementName=One, Path=Content}"></cal:Parameter> </cal:ActionMessage> </b:EventTrigger> </b:Interaction.Triggers> </Button> 问题：我想重用有关触发器的代码，我知道我应该提取这个触发器逻辑来资源，我可以这样使用它： <Button Name="One" Style="{StaticResource blue_button}" Content="1" Action={StaticResource InputAction,Parameter=Binding{ElementName=One Path=Content}}/> <Button Name="Two" Style="{StaticResource blue_button}" Content="2" Action={StaticResource InputAction,Parameter=Binding{ElementName=Two Path=Content}}/> <Button Name="Three" Style="{StaticResource blue_button}" Content="3" Action={StaticResource InputAction,Parameter=Binding{ElementName=Three Path=Content}}/> ... <Button Name="Plus" Style="{StaticResource blue_button}" Content="+" Action={StaticResource InputAction,Parameter=Binding{ElementName=Plus Path=Content}}/> 设置按钮动作的主要方式是使用命令。在 WPF 上具有 GUI 的典型解决方案中，通常会实现 MVVM 模式。在这种情况下，命令是在 ViewModel 中设置的。您可以将参数传递给命令以进行进一步处理。我将以非常简化的形式向您展示 ViewModel 还执行 Model 功能的实现。该示例使用我的 ViewModelBase 实现。您可以将其替换为您方便的任何内容。或者，如果您对我的实现感兴趣，可以从此存储库中获取它：https://github.com/INexteR/NewTrade/tree/main/NewTradeSln/ViewModels using Simplified; using System.Collections.ObjectModel; namespace Core2024.SO.huojian.question78746674 { public class CalculatorViewModel : ViewModelBase { public static ReadOnlyCollection<string> ButtonNames { get; } = Array.AsReadOnly("C, +/-, %, ÷, ✖, +, -, ., =, 🠔, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ...Any Names" .Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)); public CalculatorViewModel() { DisplayedValue = "0"; } public RelayCommand CalculatorCommand => GetCommand<string>(CalculatorExecute, CalculatorCanExecute); private bool CalculatorCanExecute(string parameter) => ButtonNames.Contains(parameter); public string DisplayedValue { get => Get<string>(); private set => Set(value); } private void CalculatorExecute(string parameter) { switch (parameter) { case "0": case "1": case "2": case "3": case "4": case "5": case "6": case "7": case "8": case "9": string value = DisplayedValue; if (DisplayedValue == "0") value = string.Empty; DisplayedValue = value + parameter; break; case "C": DisplayedValue = "0"; break; case "+/-": if (DisplayedValue != "0") { if (DisplayedValue[0] == '-') DisplayedValue = DisplayedValue.Substring(1); else DisplayedValue = "-" + DisplayedValue; } break; // Logic of other buttons default: break; } } } } <Window x:Class="Core2024.SO.huojian.question78746674.CalculatorWindow" 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" xmlns:local="clr-namespace:Core2024.SO.huojian.question78746674" mc:Ignorable="d" Title="CalculatorWindow" Height="450" Width="800" DataContext="{DynamicResource vm}"> <Window.Resources> <local:CalculatorViewModel x:Key="vm"/> <Style x:Key="base" TargetType="FrameworkElement"> <Setter Property="Margin" Value="5"/> </Style> <Style x:Key="button.command" TargetType="Button"> <Setter Property="CommandParameter" Value="{Binding Content, RelativeSource={RelativeSource Self}}"/> <Setter Property="Command" Value="{Binding CalculatorCommand}"/> <Setter Property="Padding" Value="15 5"/> </Style> <Style x:Key="button.white_button" TargetType="Button" BasedOn="{StaticResource button.command}"> <Setter Property="Background" Value="White"/> <Setter Property="Foreground" Value="Blue"/> </Style> <Style x:Key="button.blue_button" TargetType="Button" BasedOn="{StaticResource button.command}"> <Setter Property="Background" Value="Blue"/> <Setter Property="Foreground" Value="White"/> </Style> </Window.Resources> <StackPanel> <TextBox Text="{Binding DisplayedValue, Mode=OneWay}" Style="{StaticResource base}" IsReadOnly="True" HorizontalContentAlignment="Right" Padding="15 5"/> <UniformGrid Columns="4"> <Button Style="{StaticResource button.blue_button}" Content="C"/> <Button Style="{StaticResource button.blue_button}" Content="+/-"/> <Button Style="{StaticResource button.blue_button}" Content="%"/> <Button Style="{StaticResource button.blue_button}" Content="÷"/> <Button Style="{StaticResource button.white_button}" Content="7"/> <Button Style="{StaticResource button.white_button}" Content="8"/> <Button Style="{StaticResource button.white_button}" Content="9"/> <Button Style="{StaticResource button.blue_button}" Content="✖"/> <Button Style="{StaticResource button.white_button}" Content="4"/> <Button Style="{StaticResource button.white_button}" Content="5"/> <Button Style="{StaticResource button.white_button}" Content="6"/> <Button Style="{StaticResource button.blue_button}" Content="+"/> <Button Style="{StaticResource button.white_button}" Content="1"/> <Button Style="{StaticResource button.white_button}" Content="2"/> <Button Style="{StaticResource button.white_button}" Content="3"/> <Button Style="{StaticResource button.blue_button}" Content="-" FontSize="25"/> <Button Style="{StaticResource button.white_button}" Content="·"/> <Button Style="{StaticResource button.white_button}" Content="0"/> <Button Style="{StaticResource button.blue_button}" Content="🠔"/> <Button Style="{StaticResource button.blue_button}" Content="="/> </UniformGrid> </StackPanel> </Window>

wpf caliburn.micro

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