文件菜单

以流方式读写文件：文件菜单打开一个文件，文件内容显示在RichTexBox中，执行复制、剪切、粘贴后，通过文件菜单可以保存修改后的文件。

 

MainWindow.xaml文件

 1 <Window
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="csharp.MainWindow"
 5         Title="演示以流方式读写文件" Height="312" Width="525">
 6     <Grid>
 7 
 8 
 9         <DockPanel>
10             <Menu DockPanel.Dock="Top" FontSize="8">
11                 <MenuItem Header="_文件" FontSize="12">
12                     <MenuItem Header="_打开" Click="OnOpenFile"/>
13                     <MenuItem Header="_保存" Click="OnSaveFile"/>
14                     <Separator/>
15                     <MenuItem Header="退出" Click="OnExit"/>
16                 </MenuItem>
17                 <MenuItem Header="_编辑" FontSize="12">
18                     
19                     <MenuItem Header="撤销" Command="Undo"/>
20                     <Separator/>
21                     <MenuItem Header="剪切" Command="Cut"/>
22                     <MenuItem Header="复制" Command="Copy"/>
23                     <MenuItem Header="粘贴" Command="Paste"/>
24                 </MenuItem>
25             </Menu>
26             <RichTextBox VerticalScrollBarVisibility="Visible" Name="richTextBox1" Margin="0,5,0,0"></RichTextBox>
27         </DockPanel>
28 
29         
30 
31     </Grid>
32 
33 </Window>
View Code

 

MainWindow.xaml.cs文件

  1 using Microsoft.Win32;
  2 using System;
  3 using System.Collections.Generic;
  4 using System.IO;
  5 using System.Linq;
  6 using System.Text;
  7 using System.Windows;
  8 using System.Windows.Controls;
  9 using System.Windows.Data;
 10 using System.Windows.Documents;
 11 using System.Windows.Input;
 12 using System.Windows.Media;
 13 using System.Windows.Media.Imaging;
 14 using System.Windows.Navigation;
 15 using System.Windows.Shapes;
 16 
 17 namespace csharp
 18 {
 19     /// <summary>
 20     /// MainWindow.xaml 的交互逻辑
 21     /// </summary>
 22     public partial class MainWindow : Window
 23     {
 24         public MainWindow()
 25         {
 26             InitializeComponent();
 27         }
 28         private void RichTextBox_TextChanged(object sender, TextChangedEventArgs e)
 29         {
 30 
 31         }
 32         public void LoadText()
 33         {
 34             string textFile = @"C:\Users\yinyin\Desktop\hw\a.txt";//默认打开此文件
 35             FileStream fs;
 36             if (File.Exists(textFile))
 37             {
 38                 fs = new FileStream(textFile, FileMode.Open, FileAccess.Read);
 39                 using (fs)
 40                 {
 41                     TextRange text = new TextRange(richTextBox1.Document.ContentStart, richTextBox1.Document.ContentEnd);
 42                     text.Load(fs, DataFormats.Text);
 43                 }
 44 
 45             }
 46         }
 47      
 48         private static void SaveFile(string filename, RichTextBox richTextBox)
 49         {
 50             if (string.IsNullOrEmpty(filename))
 51             {
 52                 throw new ArgumentNullException();
 53             }
 54 
 55             using (FileStream stream = File.OpenWrite(filename))
 56             {
 57                 TextRange documentTextRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);
 58                 string dataFormat = DataFormats.Text;
 59 
 60                 string ext = System.IO.Path.GetExtension(filename);
 61 
 62                 if (String.Compare(ext, ".xaml", true) == 0)
 63                 {
 64                     dataFormat = DataFormats.Xaml;
 65                 }
 66                 else if (String.Compare(ext, ".rtf", true) == 0)
 67                 {
 68                     dataFormat = DataFormats.Text;
 69                 }
 70                 documentTextRange.Save(stream, dataFormat);
 71             }
 72         }
 73        
 74         
 75         private void OnOpenFile(object sender, EventArgs e)
 76         {
 77             OpenFileDialog ofd = new OpenFileDialog();
 78             ofd.Filter = "Text Files (*.txt; *.xaml; *.rtf)|*.txt;*.xaml;*.rtf";
 79             ofd.Multiselect = false;
 80             if (ofd.ShowDialog() == true)
 81             {
 82                 LoadText();
 83             }
 84         }
 85 
 86         private void OnSaveFile(object sender, EventArgs e)
 87         {
 88             SaveFileDialog sfd = new SaveFileDialog();
 89             sfd.Filter = "Text Files (*.txt; *.xaml; *.rtf)|*.txt;*.xaml;*.rtf";
 90             if (sfd.ShowDialog() == true)
 91             {
 92                 SaveFile(sfd.SafeFileName, richTextBox1);
 93             }
 94         }
 95 
 96         private void OnExit(object sender, EventArgs e)
 97         {
 98             this.Close();
 99         }
100 
101     }
102 }
View Code

运行步骤

1．              在菜单栏中找到“打开” MenuItem；

2．              找到“a.txt”文件并打开；

3．              编辑（或通过编辑菜单编辑）内容；

4．              通过文件菜单栏编辑后的文件；

5．              将编辑后的文件保存；

6．              查看保存后的文件；

7．              查看修改后的文件，可以看到保存的文件的内容是被编辑后的。


posted @ 2017-11-24 22:04  Megan_hyy  阅读(397)  评论(0)  编辑  收藏  举报