查询上传数据时出错!Microsoft Jet 数据库引擎找不到对象'a$'。请确定对象是否存在,并正确地写出它的名称和路径。
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
using System.Data.SqlClient;public class BaseFunction
{    /// <summary>    /// 取得上传文件的数据集    /// </summary>    /// <param name="strUpFileExtName">上传文件扩展名</param>    /// <param name="strUpFileName">上传文件名</param>    /// <param name="strUpPath">上传的路径</param>    /// <param name="strSplitChar">拆分字符或Excel表名</param>    /// <param name="aryField">要导入的数据字段数组</param>    /// <returns></returns>    public static DataSet GetOleDbData(string strUpFileExtName, string strUpFileName, string strUpPath, string strSplitChar, string[] aryField, bool preview)
    {        string strDBDatabaseName;        string DBSQL;        if (preview)
        {            DBSQL = "select top 10 * from {0}";        }        else
        {            DBSQL = "select * from {0}";        }        string oleConnStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties={1};";        switch (strUpFileExtName)
        {            case ".xls":
                {                    strDBDatabaseName = strUpPath + strUpFileName;//excel数据库完整文件名作为数据源                    DBSQL = String.Format(DBSQL, "[" + strUpFileName + "$]");//"SELECT * FROM ["+tbExcel.Text+"$]";      //硬性规定只能在Sheet1工作表中存放数据                    oleConnStr = String.Format(oleConnStr, strDBDatabaseName, "Excel 8.0");                    break;                }        }        //通过ole数据提供者获得数据        OleDbConnection oleConnection = new OleDbConnection(oleConnStr);        OleDbDataAdapter dbdat = new OleDbDataAdapter(DBSQL, oleConnection);        DataSet upDs = new DataSet();
                try
        {            dbdat.Fill(upDs, strUpFileName);
            if (upDs.Tables[strUpFileName].Columns.Count > aryField.Length)
            {                //上传的字段不合法                throw new Exception("上传的文件字段不符合规则!列数为" + upDs.Tables[strUpFileName].Columns.Count.ToString());            }
        }        catch (Exception ex)
        {            throw new Exception("查询上传数据时出错!" + ex.Message);        }        finally
        {            if (dbdat != null)
            {                dbdat.Dispose();                dbdat = null;            }            if (oleConnection != null)
            {                oleConnection.Dispose();                oleConnection = null;            }        }        return upDs;    }}我把新建的Excel另存为4.0格式的,导入没问题!但是新建的Excel不转换就抛异常!即使里面的内容一样也不行!