Question

我有一个由我创建的用户控件，其中包含Image，TextBlock和TextBox。我们的想法是编写一个可以读取目录中所有图像文件的应用程序，并为每个文件创建用户控件，并将文件路径作为参数。

namespace ImageViewerMother
{
    /// <summary>
    /// Interaction logic for ImageRep.xaml
    /// </summary>
    public partial class ImageRep : UserControl
    {
        public string path { get; set; }
        public string name { get; set; }

        public ImageRep(string path)
        {
            this.path = path;            

            InitializeComponent();
            InitializeImage(path);
            SettingName();
        }

        private void InitializeImage(string path)
        {
            ImageHolder.Source = new BitmapImage(new Uri(path, UriKind.Absolute));
            RenderOptions.SetBitmapScalingMode(ImageHolder, BitmapScalingMode.Fant);
            ImageHolder.Height = 150;
            ImageHolder.Width = 150;
        }

        private void SettingName()
        {
            this.name = io.Path.GetFileNameWithoutExtension(path);
            NameHolder.Text = name;
            NameHolderChange.Text = name;
        }

        private void NameHolder_PreviewMouseDown(object sender, MouseButtonEventArgs e)
        {
            NameHolder.Visibility = Visibility.Collapsed;
            NameHolderChange.Visibility = Visibility.Visible;
        }

        private void NameHolderChange_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Return)
            {
                //CREATING NEW PATH TO RENAMED FILE
                string newPath = io.Path.GetDirectoryName(path).ToString() 
                    + @"\" + NameHolderChange.Text + io.Path.GetExtension(path);
                //CREATING COPY OF THE FILE WITH NEW NAME
                io.File.Copy(path, newPath);
                //REDIRECTING IMAGE TO A NEW SOURCE
                InitializeImage(newPath);
                //DELETING OLD FILE
                //GC.Collect();
                //GC.WaitForPendingFinalizers();
                io.File.Delete(path);
                //REPLACING OLD PATH WITH THE NEW ONE AND 
                //ACTUALIZING NAME OF THE FILE IN TEXTBOX AND BLOCK
                path = newPath;
                SettingName();
                NameHolder.Visibility = Visibility.Visible;
                NameHolderChange.Visibility = Visibility.Collapsed;
            }
        }
    }
}

因此，当用户单击TextBlock时，它会折叠，TextBox变为可见，允许为该文件写一个新名称。当用户按Enter键时，应用程序将生成具有新名称的文件的新副本，图像源重定向到新源，旧文件将被删除。但我无法删除该文件，因为我得到一个未处理的异常：

A first chance exception of type 'System.IO.IOException' occurred in mscorlib.dll
An unhandled exception of type 'System.IO.IOException' occurred in mscorlib.dll

Additional information: The process cannot access the file 'E:\foldery\123fgdg\43_460s.jpg' because it is being used by another process.

我在stackoverflow上读到它并且有很多答案，但它们都不像我的。我没有访问该文件的任何流的实例，Image组件不再使用它的路径作为源。我很确定我的程序阻止访问图像，因为当发生错误并且我尝试从窗口浏览器中删除文件时，我无法访问它，但是当我关闭我的应用程序时，我可以毫无问题地删除它。

还有一段代码 - 这就是我如何获取文件的路径：

string[] unfilteredFiles = Directory.GetFiles(newLocationFolder);
foreach (string file in unfilteredFiles)
{
    ImageRep imageRep = new ImageRep(file);
    IMGWrapHolder.Children.Add(imageRep);
}

使用File.Delete删除文件会抛出System.IO.IOException

0 个答案: