ASP.NET Excel 导入数据库

后台：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.mySQLConnection;
using System.Data.SqlClient;
public partial class studentAdmit_daoru : System.Web.UI.Page
{
    public DataSet ExecleDs(string filenameurl,string table)
    {
        
            string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" +filenameurl+ ";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'";
          
            OleDbConnection conn = new OleDbConnection(strConn);
            OleDbDataAdapter odda = new OleDbDataAdapter("select * from [Sheet1$]", conn);
            DataSet ds = new DataSet();
            odda.Fill(ds,table);
     
            return ds;
   }
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void Button1_ServerClick(object sender, EventArgs e)
    {
     
        string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName.ToString().ToLower());
        if (IsXls != ".xls")
        {
          Page.ClientScript