public void LoadImages(ReferenceHandling refHandling = ReferenceHandling.Undefined)
{
ImageFileNames = new ObservableCollection<string>();
List<string> filesToRemove = new List<string>();
List<string> filesToAdd = new List<string>();
if(Directory.Exists(GalleryDirectory)){
IEnumerable<string> availableFiles = from path in Directory.GetFiles(GalleryDirectory) select Path.GetFileName(path);
// Add files if they are located in the gallery folder and handle the others as specified
foreach (string fileName in Model.ImageFileNames) {
if (availableFiles.Contains(fileName)) {
filesToAdd.Add(fileName);
}
else {
if (refHandling == ReferenceHandling.Undefined) {
// Let the user decide how to handle references to non-existing files
ErrorMessage fileNotFound = new ErrorMessage("File Not Found Error",
"File \"" + fileName + "\" not found. Do you want to proceed and remove all non-existent files from the gallery?",
new Dictionary<string, UndoableCommand> { {"Yes", LoadValidImagesCommand}, {"Keep references", LoadAllFilesCommand}, {"Cancel", null} });
mediator.ShowMessage(fileNotFound);
return;
}
else if (refHandling == ReferenceHandling.RemoveNonExisting) {
// Do not add the file to the view model's collection and remove its reference from the model
filesToRemove.Add(fileName);
}
else { // if(refHandling == ReferenceHandling.KeepNonExisting)
// Add the file anyway and ignore that it does not exist
filesToAdd.Add(fileName);
}
}
}
foreach (string file in filesToAdd) {
ImageFileNames.Add(file);
Console.WriteLine(file);
}
Model.ImageFileNames.RemoveAll(file => filesToRemove.Contains(file));
RaisePropertyChanged("ImageFileNames");
}
}
public ErrorDialog(ErrorMessage errorMessage)
{
this.DataContext = errorMessage;
InitializeComponent();
}
public void ShowMessage(ErrorMessage error)
{
ErrorDialog errorDialog = new ErrorDialog(error);
errorDialog.Show();
}
