无法删除某些其他进程使用的文件 [英] Cannot delete file used by some other process

问题描述

我在我的wpf应用程序中使用以下代码显示一些图像：

I am displaying some image in my wpf app using following code:

 <Image Source="{Binding Path=TemplateImagePath, Mode=TwoWay}"  Grid.Row="3" Grid.Column="2"  Width="400" Height="200"/>

并在代码后面的构造函数中设置绑定属性，下面是代码： / p>

and setting it's binding property inside code behind's constructor by navigating through some directory, below is the code:

DirectoryInfo Dir = new DirectoryInfo(@"D:/Template");
            if (Dir.Exists)
            {
                if (Dir.GetFiles().Count() > 0)
                {
                    foreach (FileInfo item in Dir.GetFiles())
                    {
                        TemplateImagePath = item.FullName;
                    }
                }
            }

image我需要删除这个旧的图像，这是我在做以下方式和设置图像绑定为null：

but if user upload some other image then I need to delete this old image which is I am doing in the following way and setting image binding to null:

DirectoryInfo Dir = new DirectoryInfo(@"D:/Template");
                if (Dir.Exists)
                {
                    if (Dir.GetFiles().Count() > 0)
                    {
                        foreach (FileInfo item in Dir.GetFiles())
                        {
                            TemplateImagePath= null;
                            File.Delete(item.FullName);
                        }
                    }
                }

删除其他进程使用的文件。
如何删除它？

But Iam getting exception that Cannot delete file used by some other process. How can I delete it?

推荐答案

为了能够删除图像， ImageControl，您必须创建新的 BitmapImage 或 BitmapFrame 对象，其具有 BitmapCacheOption.OnLoad 设置。

In order to be able to delete the image while it is displayed in an ImageControl, you have to create a new BitmapImage or BitmapFrame object that has BitmapCacheOption.OnLoad set. The bitmap will then be loaded from file immediately and the file is not locked afterwards.

更改属性 string TemplateImagePath 到 ImageSource TemplateImage 并以如下方式进行绑定：

Change your property from string TemplateImagePath to ImageSource TemplateImage and bind like this:

<Image Source="{Binding TemplateImage}"/>

设置 TemplateImage

BitmapImage image = new BitmapImage();
image.BeginInit();
image.CacheOption = BitmapCacheOption.OnLoad;
image.UriSource = new Uri(item.FullName);
image.EndInit();
TemplateImage = image;

或：

TemplateImage = BitmapFrame.Create(
    new Uri(item.FullName),
    BitmapCreateOptions.None,
    BitmapCacheOption.OnLoad);

---

如果您要保持绑定到 TemplateImagePath 属性，您可以改为使用绑定转换器，将字符串转换为ImageSource如上所示。

---

If you want to keep binding to your TemplateImagePath property you may instead use a binding converter that converts the string to an ImageSource as shown above.

这篇关于无法删除某些其他进程使用的文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！