WPF 学习笔记（十二）

（一）打开、保存对话框

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

        private void openBtn_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "文本文件|*.txt|视频文件|*.avi";
            if (ofd.ShowDialog() == true)
            {
                string fileName = ofd.FileName;
                MessageBox.Show(fileName);
            }
            else
            {
                MessageBox.Show("打开失败");
            }
        }

        private void saveBtn_Click(object sender, RoutedEventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Filter = "文本文件|*.txt|视频文件|*.avi";
            if (sfd.ShowDialog() == true)
            {
                string fileName = sfd.FileName;
                MessageBox.Show(fileName);
            }
            else
            {
                MessageBox.Show("保存失败");
            }
        }

 （二）打开图片案例

使用到控件Image

        private void openBtn_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "JPG|*.jpg|png|*.png";
            if (ofd.ShowDialog() == true)
            {
                string fileName = ofd.FileName;
                image.Source = new BitmapImage(new Uri(fileName));
               
            }
            else
            {
                MessageBox.Show("打开失败");
            }
        }