wpflistbox多列表现图片（可加载url的网络图片）

[{"title":"（18个子文件14KB）wpflistbox多列显示图片（可加载url的网络图片）","children":[{"title":"WebImageList.sln <span style='color:#111;'>926B</span>","children":null,"spread":false},{"title":"WebImageList","children":[{"title":"WebImageList.csproj <span style='color:#111;'>4.83KB</span>","children":null,"spread":false},{"title":"ImageDecoder.cs <span style='color:#111;'>2.64KB</span>","children":null,"spread":false},{"title":"MainViewModel.cs <span style='color:#111;'>693B</span>","children":null,"spread":false},{"title":"App.xaml.cs <span style='color:#111;'>308B</span>","children":null,"spread":false},{"title":"MainWindow.xaml.cs <span style='color:#111;'>775B</span>","children":null,"spread":false},{"title":"list.txt <span style='color:#111;'>1.66KB</span>","children":null,"spread":false},{"title":"MainWindow.xaml <span style='color:#111;'>1.15KB</span>","children":null,"spread":false},{"title":"loading.png <span style='color:#111;'>1.28KB</span>","children":null,"spread":false},{"title":"Properties","children":[{"title":"Settings.settings <span style='color:#111;'>201B</span>","children":null,"spread":false},{"title":"Resources.Designer.cs <span style='color:#111;'>2.81KB</span>","children":null,"spread":false},{"title":"AssemblyInfo.cs <span style='color:#111;'>2.14KB</span>","children":null,"spread":false},{"title":"Settings.Designer.cs <span style='color:#111;'>1.07KB</span>","children":null,"spread":false},{"title":"Resources.resx <span style='color:#111;'>5.48KB</span>","children":null,"spread":false}],"spread":true},{"title":"App.xaml <span style='color:#111;'>312B</span>","children":null,"spread":false},{"title":"WaitingProgress.xaml.cs <span style='color:#111;'>1.15KB</span>","children":null,"spread":false},{"title":"WaitingProgress.xaml <span style='color:#111;'>1.03KB</span>","children":null,"spread":false},{"title":"ImageQueue.cs <span style='color:#111;'>4.22KB</span>","children":null,"spread":false}],"spread":false}],"spread":true}]