请教c#+access 登录的问题

我编写的登录按钮代码如下：

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protected void login_Click(object sender, EventArgs e)

{

string name = zygs_user.Text;

string pass = zygs_pwd.Text;

try

{

OleDbConnection objConn = new OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;Data Source=" + Server.MapPath("App_Data/zyq_user.mdb"));

objConn.Open();

string str = "select * from [zygs_user] where [user_ID] =" + name + " and [user_pass] =" + pass + "";

OleDbCommand Comm = new OleDbCommand(str, objConn);

OleDbDataReader rd = Comm.ExecuteReader();

if (rd.Read())

{

string shuyu = rd["user_shuyu"].ToString();

Session["shuyu"] = shuyu;

Session["yonghu"] = name;

Response.Redirect("~/login.aspx");

}