RhSolutions-AddIn/RhSolutions.AddIn/Services/FileDialog.cs

namespace RhSolutions.Services;

public class FileDialog : IFileDialog
{
    private readonly Application _application;

    public FileDialog(Application application)
    {
        _application = application;
    }

    public string GetFile()
    {
        var dialog = _application.FileDialog[Microsoft.Office.Core.MsoFileDialogType.msoFileDialogFilePicker];
        dialog.AllowMultiSelect = false;
        dialog.Filters.Add("Файлы Excel", "*.xls; *.xlsx; *.xlsm");

        if (dialog.Show() == -1)
        {
            return dialog.SelectedItems.Item(1);
        }
        else return string.Empty;
    }

    public string[] GetFiles()
    {
        var dialog = _application.FileDialog[Microsoft.Office.Core.MsoFileDialogType.msoFileDialogFilePicker];
        dialog.AllowMultiSelect = true;
        dialog.Filters.Add("Файлы Excel", "*.xls; *.xlsx; *.xlsm");

        if (dialog.Show() == -1)
        {
            List<string> files = new();

            foreach (string file in dialog.SelectedItems)
            {
                files.Add(file);
            }

            return files.ToArray();
        }
        
        else return Array.Empty<string>();
    }
}