C# 文件的读取与另存为（WPF）

刚学习时，随便记录的一个小程序。因为有不少人看(应该都是学生),稍作修改，方便阅读。

xaml：样式

<!--绑定事件-->

<Window.CommandBindings>
    <CommandBinding Command="Open" Executed="OnOpen"/>
    <CommandBinding Command="Save" Executed="OnSave"/>
    </Window.CommandBindings>
<Grid>
    <DockPanel>
        <Menu DockPanel.Dock="Top">
            <MenuItem Header="文件">
            <MenuItem Header="打开" Command="Open"/>
            <MenuItem Header="另存为" Command="Save"/>
            </MenuItem>
        </Menu>
        <TextBox x:Name="text1" AcceptsReturn="True"     AcceptsTab="True"/>
    </DockPanel>
</Grid>                

CS：后台代码

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void OnOpen(object sender, ExecutedRoutedEventArgs e)
    {
        //学生可能不了解OpenFileDialog类；该类具体介绍参考：https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.openfiledialog?view=netcore-3.1
        var dlg = new OpenFileDialog()
        {
            Title = "简单编辑器-打开",
            CheckPathExists = true,
            CheckFileExists = true,
            Filter = "Text files (*.txt)|*.txt|All files|*.*",
            InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyComputer)
        };
        if (dlg.ShowDialog() == true)
        {
            text1.Text = File.ReadAllText(dlg.FileName);
        }
    }

    private void OnSave(object sender, ExecutedRoutedEventArgs e)
    {
        var dlg = new SaveFileDialog()
        {
            Title = "简单编辑器-另存为",
            DefaultExt = "txt",
            Filter = "Text files (*.txt)|*.txt|All files|*.*",
        };
        if (dlg.ShowDialog() == true)
        {
            File.WriteAllText(dlg.FileName,text1.Text);
        }
    }
}

 简单读取文件另存文件（仅仅打开txt文件，其他文件没有进行转码）