Excel导出采用mvc的ExcelResult继承遇到的问题

ExcelResult继承：ViewResult（只支持excel版本2003及兼容2003的版本）通过视图模板生成excel

	/// <summary>
	/// ms-excel视图
	/// </summary>
	public class ExcelResult:ViewResult
	{
		#region 字段
		private string _fileName;
		#endregion

		#region 构造函数
		public ExcelResult(string fileName, object model)
			: this(null, fileName, model)
		{
		}

		public ExcelResult(string viewName, string fileName, object model)
		{
			this.ViewName = viewName;
			this.ViewData.Model = model;
			_fileName = fileName;
		}
		#endregion

		#region 重写方法
		public override void ExecuteResult(ControllerContext context)
		{
            base.ExecuteResult(context);

            var response = context.HttpContext.Response;
            response.ContentType = "application/ms-excel";
            response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");
            //response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
            response.Charset = "utf-8";
            response.Headers.Set("Content-Disposition", string.Format("attachment; filename={0}-{1:yyyy-MM-dd}.xls", _fileName, DateTime.Now));

		}
		#endregion
	}

　　方法调用：

ActionResult 方法（）{

return ExcelView("Exportinfo", "信息", cooperates.ToList());// cooperates.ToList()查询到的数据列表

}

视图页不用生成控制方法：

@model IEnumerable<Zhuoli.Model.BInfo>
@{
        Layout = null;

 }
    <table cellspacing="" cellpadding="" rules="all" border="">
        <thead>
            <tr>
                <th>编号</th>
            </tr>
        </thead>
        <tbody id="list-table-body">
            @foreach (var item in Model)
            {
                <tr>
                    @*编号*@
                    <td>@item.ID</td>
                </tr>
            }
        </tbody>
    </table>