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

<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

 1 public partial class MainWindow : Window
 2 {
 3     public MainWindow()
 4     {
 5         InitializeComponent();
 6     }
 7 
 8     private void OnOpen(object sender, ExecutedRoutedEventArgs e)
 9     {
10         //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
11         var dlg = new OpenFileDialog()
12         {
13             Title = "简单编辑器-打开",
14             CheckPathExists = true,
15             CheckFileExists = true,
16             Filter = "Text files (*.txt)|*.txt|All files|*.*",
17             InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyComputer)
18         };
19         if (dlg.ShowDialog() == true)
20         {
21             text1.Text = File.ReadAllText(dlg.FileName);
22         }
23     }
24 
25     private void OnSave(object sender, ExecutedRoutedEventArgs e)
26     {
27         var dlg = new SaveFileDialog()
28         {
29             Title = "简单编辑器-另存为",
30             DefaultExt = "txt",
31             Filter = "Text files (*.txt)|*.txt|All files|*.*",
32         };
33         if (dlg.ShowDialog() == true)
34         {
35             File.WriteAllText(dlg.FileName,text1.Text);
36         }
37     }
38 }