public FilePickerFilter([NotNull] FileExtensionPackage extensionPackage)
{
if (extensionPackage == null)
{
throw new ArgumentNullException(nameof(extensionPackage));
}
Filter = ConstructFilter(extensionPackage);
}
private static string ConstructFilter(FileExtensionPackage extensionPackage)
{
IEnumerable <string> cache = extensionPackage.Select(ae => "*" + ae.Extension);
StringBuilder filter =
new StringBuilder(
$"{extensionPackage.PackageName} ({string.Join(",", cache)})|{string.Join(";", cache)}");
foreach (var fileExtension in extensionPackage)
{
filter.Append("|");
filter.Append($"{fileExtension.Name} (*{fileExtension.Extension})|*{fileExtension.Extension}");
}
return(filter.ToString());
}