// 資料夾拖曳進 Image Viewer / Main Folder
 private void Grid_Drop(object sender, DragEventArgs e)
 {
     preview_mode.IsChecked = false;
     if (e.Data.GetDataPresent(DataFormats.FileDrop))
     {
         string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
         if (files.Length == 1)
         {
             string file     = files[0];
             string filename = System.IO.Path.GetFileName(file);
             string file_ex  = System.IO.Path.GetExtension(filename);
             if (file_ex != string.Empty)
             {
                 GloableObject.change_src(file);
                 folder_info.Text          = "...";
                 targetFolder_path.Text    = System.IO.Path.GetFileName(file);
                 targetFolder_path.ToolTip = file;
                 GloableObject.logger($"✔🔽 [Load File] - Loaded:[{filename}] Path:[{file}]");
             }
             else
             {
                 GloableObject.curPath = file;
                 GloableObject.random_image(file + '\\');
                 targetFolder_path.Text = file;
                 GloableObject.logger($"✔🔽 [Load Folder] - Loaded:[{filename}] Path:[{file}]");
                 GloableObject.logger($"✔⚙ [Set Main Directory] - Path: [ {file} ]", "HighLight");
                 GloableObject.folderInfo();
             }
         }
         else
         {
             MessageBox.Show("Only Can Drop One File / Folder.");
             return;
         }
     }
 }