C# 打開對話框的檔案目錄路徑 對話儲存目錄路徑

代碼如下:

public class FileTool
    {
        /// <summary>
        /// 打開檔案 
        /// </summary>
        /// <param name="filter">檔案适配格式</param>
        /// <returns></returns>
        public static string OpenFile(string filter)
        {
            OpenFileDialog open_file = new OpenFileDialog();
            open_file.Filter = filter;
            //open_file.ShowDialog();
            Nullable<bool> result = open_file.ShowDialog();
            if (result == true)
            {
                return open_file.FileName.ToString();
            }
            return "";
        }


        /// <summary>
        /// 儲存Excel格式的檔案 
        /// </summary>
        /// <param name="filter">檔案适配格式</param>
        /// <returns></returns>
        public static string Save_Excel()
        {
            string filePath = string.Empty;
            SaveFileDialog saveDialog = new SaveFileDialog();
            saveDialog.Filter = "Execl files (*.xlsx)|*.xlsx";
            saveDialog.FilterIndex = 0;
            if (saveDialog.ShowDialog() == true)
            {
                filePath = saveDialog.FileName;
            }
            return filePath;

        }
    }