/// <summary>
/// 远程下载Excel文件，MVC中return new EmptyResult();
/// </summary>
/// <param name="response"></param>
/// <param name="fileName"></param>
public void Save(HttpResponseBase response, string fileName)
{
ExcelUtils.Save(Workbook, response, fileName);
}
/// <summary>
/// 本地保存Excel文件
/// </summary>
/// <param name="file"></param>
public void Save(string file)
{
ExcelUtils.Save(Workbook, file);
}