DataTable importData = this.GetDataFromExcel(fileName); 为啥不可以用

GetDataFromExcel() 
这是个方法，，没写当然不能调用

/// <summary>
        /// 解析Excel，根据OleDbConnection直接连Excel
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="name"></param>
        /// <returns></returns>
        public static DataTable GetDataFromExcel(string filePath, string name)
        {
            try
            {
                string strConn;
                //   strConn = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = " + filePath + ";Extended Properties=Excel 8.0";
                strConn = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties=\"Excel 12.0 Xml;HDR=No\"";
               OleDbConnection  OleConn = new OleDbConnection(strConn);
                OleConn.Open();
                string sql = "SELECT * FROM [" + name + "$]";//可是更改Sheet名称，比如sheet2，等等  
                OleDbDataAdapter OleDaExcel = new OleDbDataAdapter(sql, OleConn);
                DataSet OleDsExcle = new DataSet();
                OleDaExcel.Fill(OleDsExcle, name);
                OleConn.Close();
                return OleDsExcle.Table[0];
            }
            catch (Exception err)
            {
                MessageBox.Show("数据绑定Excel失败! 失败原因：" + err.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return null;
            }
        }