图片加载在C＃中的异步 [英] Loading Images asynchronous in C#

问题描述

我正在它加载大量的图片，并将其显示为缩略图一个C＃WPF应用程序。我希望做一个多线程的方式。因此，我试图执行一个BackgroundWorker。

I'm working on a C# WPF application which loads a lot of images and displays it as thumbnails. I'd like to do it in a multi-threaded way. Therefore I tried to implement a BackgroundWorker.

BackgroundWorker的的DoWork的的code（）：

The code of the BackgroundWorker's DoWork():

string[] files = e.Argument as string[];
foreach (string file in files)
{
    ImageModel image = new ImageModel();
    image.FilePath = file;
    _importWorker.ReportProgress(1, image);
    _imageCollectionVM.Images.Add(image); // also tried this one in ReportProgress()
}

在我的XAML code我绑定到ImageModel的BitmapImage的财产。 （AsyncState = TRUE于事无补。）在这里，我得到这个错误：DependencySource和的DependencyObject必须在同一个线程

In my XAML code I bind to the BitmapImage property of ImageModel. (AsyncState=True doesn't help.) Here I get this error: "DependencySource" and "DependencyObject" have to be in the same thread.

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

如果我评论了这一点，形象似乎是进口的，但我不能访问它，例如在一个ListView选择它。在它的SelectionChanged它，然后说，这对象被另一个线程拥有。

If I comment this out, the image seems to be imported but I cannot access it, e.g. by selecting it in a ListView. In its SelectionChanged it says then that this object is possessed by another thread.

我该如何解决这些问题？在此先感谢！

How do I solve these problems? Thanks in advance!

推荐答案

后台工作是大型任务伊莫好，但如果是一些简单的像你正在做的我会preFER做这样的东西。

BackGround Worker is good imo for large tasks, but if it something simple like what you are doing I would prefer to do it like this

开始用图片列表

List<Image> Images =new List<Image>();

然后运行该

Task.Factory.StartNew( () =>
{
    string[] files = e.Argument as string[];
    foreach (string file in files)
    {
        ImageModel image = new ImageModel();
        image.FilePath = file;
       // _importWorker.ReportProgress(1, image);

      this.BeginInvoke( new Action(() =>
         {
            Images.Add(image);
         }));
     }
 });

没有保证我有括号在code中的权数。

No guarantee I have the right number of brackets in that code.

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