シンプルなテキストエディタバイナリ形式として保存する必要が

Question

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

     private void btnOpenFile_Click(object sender, RoutedEventArgs e) 
     { 
      Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog(); 
      dlg.DefaultExt = ".txt"; 
      dlg.Filter = "Text documents (.txt) | *.txt"; 
      Nullable<bool> result = dlg.ShowDialog(); 
      if (result==true) 
      { 
       string filename = dlg.FileName; 
       tbEditor.Text = System.IO.File.ReadAllText(filename); 
      } 
     } 

     private void btnSaveFile_Click(object sender, RoutedEventArgs e) 
     { 
      Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog(); 
      dlg.DefaultExt = ".txt"; 
      dlg.Filter = "Text documents (.txt)|*.txt|Binary Files (.bin)|*.bin"; 
      Nullable<bool> result = dlg.ShowDialog(); 
      if (result == true) 
      { 
       string filename = dlg.FileName; 
       System.IO.File.WriteAllText(filename, tbEditor.Text); 
      } 

     } 
    } 
} 

Answer 1

まず、バイナリ拡張のためのいくつかのプレースホルダを作成しますbtnOpenFile_Clickあなたは同じことをすることができます：

if (filename.EndsWith(BINARY_EXTENSION)) 
    tbEditor.Text = Encoding.UTF8.GetString(File.ReadAllBytes(filename); // Or choose something different then UTF8 
else 
    tbEditor.Text = File.ReadAllText(filename);