如题   Excel导入数据到SqlServer中提示：定义了过多字段？

源码：

// fileName  文件名

//savePath  路径

 DataSet ds = null;
            try
            {
                string myString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + savePath + fileName + ";Extended Properties='Excel 8.0;HDR=No;IMEX=1'";
                OleDbConnection oconn = new OleDbConnection(myString);
                oconn.Open();

                ds = new DataSet();
                OleDbDataAdapter oda = new OleDbDataAdapter("select * from [Sheet1$]", oconn);
                oda.Fill(ds);
                oconn.Close();

            }
            catch (Exception ea)
            {
                My.ClientScript.Alert(this, "提供的文档错误：" + ea.Message);

            }
            return ds;

求解 ？