/// <summary>
/// Determines the filename of the file what will be used.
/// </summary>
/// <returns>The <see cref="StorageFile"/> of the file or <c>null</c> if no file was selected by the user.</returns>
/// <remarks>
/// If this method returns a valid <see cref="StorageFile"/> object, the <c>FileName</c> property will be filled
/// with the safe filename. This can be used for display purposes only.
/// </remarks>
public virtual async Task <StorageFile[]> DetermineFileAsync()
{
var fileDialog = new global::Windows.Storage.Pickers.FileOpenPicker();
var filters = Filter?.Split(';');
if (filters != null)
{
foreach (var filter in filters)
{
var finalFilter = filter;
if (finalFilter.StartsWith("*"))
{
finalFilter = finalFilter.Replace("*", string.Empty);
}
fileDialog.FileTypeFilter.Add(finalFilter);
}
}
var files = new List <StorageFile>();
if (IsMultiSelect)
{
var foundFiles = await fileDialog.PickMultipleFilesAsync();
if (foundFiles != null)
{
files.AddRange(foundFiles);
}
}
else
{
var foundFile = await fileDialog.PickSingleFileAsync();
if (foundFile != null)
{
files.Add(foundFile);
}
}
FileName = (files.Count > 0) ? files[0].Path : null;
FileNames = (files.Count > 0) ? files.Select(x => x.Path).ToArray() : null;
return((files.Count > 0) ? files.ToArray() : null);
}
/// <summary>
/// Determines the filename of the file what will be used.
/// </summary>
/// <returns>The <see cref="StorageFile"/> of the file or <c>null</c> if no file was selected by the user.</returns>
/// <remarks>
/// If this method returns a valid <see cref="StorageFile"/> object, the <c>FileName</c> property will be filled
/// with the safe filename. This can be used for display purposes only.
/// </remarks>
public virtual async Task <StorageFile[]> DetermineFileAsync()
{
var fileDialog = new global::Windows.Storage.Pickers.FileOpenPicker();
var filters = Filter?.Split(';');
if (filters != null)
{
foreach (var filter in filters)
{
var fileFilter = filter;
// Support full .NET filters (like "Text files|*.txt") as well
if (fileFilter.Contains("|"))
{
var splittedFilters = fileFilter.Split(new[] { "|" }, StringSplitOptions.RemoveEmptyEntries);
if (splittedFilters.Length == 2)
{
fileFilter = splittedFilters[1];
}
else
{
Log.Warning($"Failed to parse filter '{fileFilter}'");
fileFilter = null;
}
}
if (!string.IsNullOrWhiteSpace(fileFilter))
{
if (fileFilter.StartsWith("*"))
{
fileFilter = fileFilter.Replace("*", string.Empty);
}
}
if (!string.IsNullOrWhiteSpace(fileFilter))
{
fileDialog.FileTypeFilter.Add(fileFilter);
}
}
}
var files = new List <StorageFile>();
if (IsMultiSelect)
{
var foundFiles = await fileDialog.PickMultipleFilesAsync();
if (foundFiles != null)
{
files.AddRange(foundFiles);
}
}
else
{
var foundFile = await fileDialog.PickSingleFileAsync();
if (foundFile != null)
{
files.Add(foundFile);
}
}
FileName = (files.Count > 0) ? files[0].Path : null;
FileNames = (files.Count > 0) ? files.Select(x => x.Path).ToArray() : null;
return((files.Count > 0) ? files.ToArray() : null);
}
