C#探秘系列（十）WPF:打开文件选择器选择文件并保存

//此为点击按钮的监听事件，点击按钮弹出文件选择器
private void imageButton_Click(object sender, RoutedEventArgs e)
        {
                var dialog = new OpenFileDialog();
                dialog.Filter = ".jpg|*.jpg|.png|*.png|.jpeg|*.jpeg";
                if (dialog.ShowDialog(this) == false) return;
                _fileName = dialog.FileName;
               //初始化图片
                BitmapImage tempImage = new BitmapImage();
                tempImage.BeginInit();
                tempImage.UriSource = new Uri(_fileName, UriKind.RelativeOrAbsolute);
                tempImage.EndInit();

                //imageCavas为窗口中设置的Image控件
                imageCavas.Source = tempImage;  
        }