85 wpf sl操作.TXT檔案

 

 

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;
using System.ComponentModel;
using System.IO;

namespace WpfApplication1
{
    public class EditSomeText : Window {
        static string strFileName = Path.Combine(Environment.GetFolderPath(
            Environment.SpecialFolder.LocalApplicationData),
            "petzold\\editsometext\\aa.txt");
       // static string strFileName = Path.Combine(@"e:\11", "aa.txt");
        TextBox txtbox;
        [STAThread]
        public static void Main()
        {
            Application app = new Application();
            app.Run(new EditSomeText());
        }
        public EditSomeText()
        {
            Title = "edit some text";
            txtbox = new TextBox();
            txtbox.AcceptsReturn = true;
            txtbox.TextWrapping = TextWrapping.Wrap;
            txtbox.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
            txtbox.KeyDown+=new KeyEventHandler(txtbox_KeyDown);
            Content = txtbox;
            try
            {
                txtbox.Text = File.ReadAllText(strFileName);
            }
            catch{
           
            }
            txtbox.CaretIndex = txtbox.Text.Length;
            txtbox.Focus();

        }
        protected override void OnClosing(CancelEventArgs e)
        {
            try
            {
                Directory.CreateDirectory(Path.GetDirectoryName(strFileName));
                File.WriteAllText(strFileName,txtbox.Text);
   }
            catch(Exception exc) {
                MessageBoxResult result = MessageBox.Show(
                    "file could be saved: "+exc.Message+
                    "\n close program anyway?",Title,
                    MessageBoxButton.YesNo,
                    MessageBoxImage.Exclamation);
                e.Cancel=(result==MessageBoxResult.No);
            }
        }
        void txtbox_KeyDown(object sender,KeyEventArgs args)
        {
        if(args.Key==Key.F5){
            txtbox.SelectedText = DateTime.Now.ToString();
            txtbox.CaretIndex = txtbox.SelectionStart +
                txtbox.SelectionLength;
        }
        }
    }
}