[求助]c#中连接ACESS数据，老出现错误！
连接的是WEBCONFIG中CONN ACESS数据库 OLEDB方式
我目前理解连接ACESS就要用OLEDB方式，连接SQL用SQL的方式？这种理解对吗？

下面是错误源代码，麻烦看下
using System;
using System.Data;
using System.Data.OleDb;
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.Common;

public partial class Admin_Login : System.Web.UI.Page
{


//连接数据库
OleDbConnection conn = new OleDbConnection(ConfigurationManager.ConnectionStrings["conn"].ConnectionString);

protected void Page_Load(object sender, EventArgs e)
{

}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
string UserName = tbxaccount.Text.ToString();
string Password = tbxpwd.Text.ToString();

if (Session["CheckCode"] == null)
{
Label1ERR.Text = "系统错误，不能生成验证码";
Label1ERR.Visible = true;
return;
}
if (tbxcheckcode.Text == "")
{
Label1ERR.Text = "请输入验证码";
Label1ERR.Visible = true;
return;
}
if (String.Compare(Session["CheckCode"].ToString(), tbxcheckcode.Text, true) != 0)
{
Label1ERR.Text = "验证码错误，请输入正确的验证码。";
Label1ERR.Visible = true;
return;
}
if (UserName == "" | Password == "")
{
Label1ERR.Visible = true;
Label1ERR.Text = "请输入用户名、密码";
}
else
{

try
{

conn.Open();

String sql_ = "select * from login_users Where login_name='" + UserName + "' And login_pwd='" + Password+"'";

OleDbCommand cmd = new OleDbCommand(sql_, conn);


//就下面2句抛出异常，为什么呀？我用错了？
OleDbDataReader rs;
rs = cmd.ExecuteReader();


if (rs.Read())
{
Session["login_name"] = rs["login_name"].ToString(); //管理员名称
Session["login_power"] = rs["login_power"].ToString(); //管理权限

if (rs["login_lock"].ToString() == "1")
{
Response.Redirect("");
}
}
else
{
Response.Write("没有数据集合！");
Response.End();
}
rs.Close();
conn.Close();
}
catch (Exception rs_e)
{
Response.Write("数据操作出现错误了");
Response.End();
}

}
}
}


------解决方案--------------------

String sql_ = "select * from login_users Where login_name='" + UserName + "' And login_pwd='" + Password+"'";
Sql语句的问题。怀疑有关键字。但又似乎没有关键字。试试把表名字段名加上[]