背景

现行的文本编辑器大多都具备文本查询的能力，但是并不能直观的告诉用户两段文字的细微差异，所以对比工具在某种情况下，就起到了很便捷的效率。

关于 DiffPlex

DiffPlex 是用于生成文本差异的 C# 库

准备

NuGet 包
DiffPlex.Wpf 主要包
MaterialDesignThemes 主题包

代码实现

MainWindow.xaml

<Window
    x:Class="TextComparisonTool.MainWindow"
    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:diffplex="clr-namespace:DiffPlex.Wpf.Controls;assembly=DiffPlex.Wpf"
    xmlns:local="clr-namespace:TextComparisonTool"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    Title="文本比对工具"
    Width="800"
    Height="450"
    Icon="DiffPlex.ico"
    WindowState="Maximized"
    mc:Ignorable="d">

    <Grid Margin="5">
        <Grid.RowDefinitions>
            <RowDefinition Height="40" />
            <RowDefinition />
        </Grid.RowDefinitions>
        <WrapPanel>
            <Button
                x:Name="BtnInput"
                Click="BtnInput_Click"
                Content="输入文本"
                Style="{DynamicResource MaterialDesignFlatAccentBgButton}" />
        </WrapPanel>
        <diffplex:DiffViewer x:Name="DiffView" Grid.Row="1" />
    </Grid>

</Window>

MainWindow.xaml.cs

using System.Windows;

namespace TextComparisonTool
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();           
        }
         

        private void BtnInput_Click(object sender, RoutedEventArgs e)
        {
            InputOldeTextAndNewText input = new();

            input.ShowDialog();

            if (input.DialogResult is true)
            {
                DiffView.OldText = input.txtOldText.Text;
                DiffView.NewText = input.txtNewText.Text;
            }
        }
    }
}

InputOldeTextAndNewText.xaml

<Window
    x:Class="TextComparisonTool.InputOldeTextAndNewText"
    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"
    Title="输入新旧文本"
    Width="850"
    Height="500"
    Icon="DiffPlex.ico"
    ResizeMode="CanMinimize"
    WindowStartupLocation="CenterScreen"
    mc:Ignorable="d">
    <Border Margin="5" CornerRadius="11">
        <StackPanel>
            <TextBlock Style="{DynamicResource MaterialDesignBody1TextBlock}" Text="源文本" />
            <TextBox
                x:Name="txtOldText"
                AcceptsReturn="True"
                MaxLines="10"
                MinLines="10"
                TextWrapping="Wrap" />
            <TextBlock
                VerticalAlignment="Center"
                Style="{DynamicResource MaterialDesignBody1TextBlock}"
                Text="新文本" />
            <TextBox
                x:Name="txtNewText"
                AcceptsReturn="True"
                MaxLines="10"
                MinLines="10"
                TextWrapping="Wrap" />
            <Button
                x:Name="BtnText"
                Margin="10"
                Click="BtnText_Click"
                Content="确认"
                Style="{DynamicResource MaterialDesignFlatButton}" />
        </StackPanel>
    </Border>
</Window>

InputOldeTextAndNewText.xaml.cs

using System.Windows;

namespace TextComparisonTool
{
    /// <summary>
    /// InputOldeTextAndNewText.xaml 的交互逻辑
    /// </summary>
    public partial class InputOldeTextAndNewText : Window
    {
        public InputOldeTextAndNewText()
        {
            InitializeComponent();
        }

        private void BtnText_Click(object sender, RoutedEventArgs e)
        {
            DialogResult = true;
        }
    }
}