asp.net 中excel 导入数据库

protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["LYConnectionString"].ConnectionString); ;//链接数据库
        conn.Open();
        try
        {
            string fileurl = typename(FileUpload1);//调用typename方法取得excel文件路径
            DataSet ds = new DataSet();//取得数据集
            ds = xsldata(fileurl);
            int errorcount = 0;//记录错误信息条数
            int insertcount = 0;//记录插入成功条数
            int updatecount = 0;//记录更新信息条数
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                string stuid = ds.Tables[0].Rows[i][0].ToString();
                string stuname = ds.Tables[0].Rows[i][1].ToString();
                string stusex = ds.Tables[0].Rows[i][2].ToString();
                string zhuanye = ds.Tables[0].Rows[i][3].ToString();
                string classname = ds.Tables[0].Rows[i][4].ToString();
                Response.Write(stuid);
                Response.Write(stuname);
                Response.Write(stusex);
                Response.Write(zhuanye);
                Response.Write(classname);
       
                if (stuid != "" && stuname != "" && stusex != "" && zhuanye != "" && classname != "")
                {
                    SqlCommand selectcmd = new SqlCommand("select count(*) from stud  ", conn);
                    int count = Convert.ToInt32(selectcmd.ExecuteScalar());
                    if (count > 0)
                    {
                        SqlCommand selectcmd2 = new SqlCommand("select count(*) from stud where   stuid='" + stuid + "'", conn);
                        int count2 = Convert.ToInt32(selectcmd2.ExecuteScalar());
                        if (count2 > 0)
                        {
                            SqlCommand updatecmd = new SqlCommand("update stud set   stuname='" + stuname + "',stusex='" + stusex + "',zhuanye='" + zhuanye + "',classname='" + classname + "'   where stuid='" + stuid + "'", conn);
                            updatecmd.ExecuteNonQuery();
                            updatecount++;
                        }
                        else
                        {
                            SqlCommand insertcmd = new SqlCommand("insert into  stud    values('" + stuid + "','" + stuname + "','" + stusex + "','" + zhuanye + "','" + classname + "')", conn);
                            insertcmd.ExecuteNonQuery();
                            insertcount++;
                        }
                    }
                    else
                    {
                        SqlCommand insertcmd = new SqlCommand("insert into  stud    values('" + stuid + "','" + stuname + "','"                       + stusex + "','" + zhuanye + "','" + classname + "')", conn);
                        insertcmd.ExecuteNonQuery();

 
                        //break;

                    }
                }
                else
                {
                    errorcount++;
                }
            }
            Response.Write("<script language='javascript'>alert('" + insertcount + "条数据导入成功！" + updatecount + "条数据更新成功！" + errorcount + "条数据部分信息为空没有导入！');</script>");
        }
        //catch (Exception exp)
        //{
        //    Response.Write("<script language='javascript'>alert('导入失败！');</script>");
        //}
        finally
        {
            conn.Close();
        }    
    }
//判断上传文件，并保存文件
    private String typename(FileUpload fileloads)
    {
        string fullfilename = fileloads.PostedFile.FileName;
        string filename = fullfilename.Substring(fullfilename.LastIndexOf("\\\\") + 1);
        string type = fullfilename.Substring(fullfilename.LastIndexOf(".") + 1);
        string murl = "";
        if (type == "xls")
        {
            fileloads.PostedFile.SaveAs(Server.MapPath("excel") + "\\\\" + filename);
            murl = (Server.MapPath("excel") + "\\\\" + filename).ToString();
        }
        else
        {
            Response.Write("<script language='javascript'>alert('导入文件格式不对!');</script>");

        }
        return murl;
    }
 // 数据库导入数据集dataset
     private DataSet xsldata(string filepath)
     {
        string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;IMEX=1'";
        //如果是导入excel2013版本，连接字符串则应该变成

          string strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties='Excel 12.0;IMEX=1'";

        System.Data.OleDb.OleDbConnection Conn = new System.Data.OleDb.OleDbConnection(strCon);
        string strCom = "SELECT * FROM [Sheet1$]";
        Conn.Open();
        System.Data.OleDb.OleDbDataAdapter myCommand = new System.Data.OleDb.OleDbDataAdapter(strCom, Conn);
        DataSet ds = new DataSet();
        myCommand.Fill(ds, "[Sheet1$]");
        Conn.Close();
        return ds;
    }
}