WPF如何删除已经打开的图片文件

在WPF中，你也许会碰到这种情况，图片在界面打开，想用File.Delate()删除却无法删除。

比如：

XAML:

<Window x:Class="WPF_Testing_Application.Window1"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="Window1" Height="300" Width="300">

<StackPanel Height="100" Name="stackPanel1" Width="200" />

</Window>

Code:

public Window1()

{

InitializeComponent();

BitmapImage bi = new BitmapImage();

bi.BeginInit();

bi.UriSource = new Uri(@"C:\Users\Public\Pictures\Sample Pictures\Autumn Leaves - Copy.jpg");

bi.EndInit();

Image image1 = new Image();

image1.Source = bi;

stackPanel1.Children.Add(image1);

stackPanel1.MouseLeftButtonDown += delegate { DeleteImage(); };

}

private void DeleteImage()

{

stackPanel1.Children.RemoveAt(0);

File.Delete(@"C:\Users\Public\Pictures\Sample Pictures\Autumn Leaves - Copy.jpg");

}

这样会出现文件被占用，无法删除的异常。

解决办法：www.2cto.com

把代码改成：

public Window1()

{

InitializeComponent();

BitmapImage bi = new BitmapImage();

bi.BeginInit();

bi.CacheOption = BitmapCacheOption.OnLoad; //增加这一行

bi.UriSource = new Uri(@"C:\Users\Public\Pictures\Sample Pictures\Autumn Leaves - Copy.jpg");

bi.EndInit();

Image image1 = new Image();

image1.Source = bi;

stackPanel1.Children.Add(image1);

stackPanel1.MouseLeftButtonDown += delegate { DeleteImage(); };

}

就可以了。

如果你用ObservableCollection<BitmapImage>作为datasouce,

             BitmapImage bmp = new BitmapImage();

              bmp.BeginInit();

              bmp.UriSource = new Uri("Blue hills.jpg", UriKind.Relative);

              bmp.CacheOption = BitmapCacheOption.OnLoad;

              bmp.EndInit();

用以下方式删除就可以了：

BitmapImage img = (BitmapImage)listPictures.SelectedItem;

File.Delete(img.UriSource.ToString());

摘自 soft2buy