If不成功,不执行Else了!!怎么办??

自己做的login.aspx  其中代码如下

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;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string constring = "provider=microsoft.jet.oledb.4.0;data source=" + Server.MapPath(".") + "//db.mdb";
        OleDbConnection con = new OleDbConnection(constring);

        string sql = "select * from users where name='" + name.Text.ToString() + "'";
        
        OleDbCommand com = new OleDbCommand(sql, con);
        com.Connection.Open();
        OleDbDataReader dr;
        dr = com.ExecuteReader();
      

        while (dr.Read())
        {


            if (dr[2].ToString() == password.Text)
            {
                Session["name"] = name.Text;
                Response.Redirect("index.aspx");
            }
            else
                Response.Redirect("error.aspx");
    }
    }
    protected void name_TextChanged(object sender, EventArgs e)
    {

    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        name.Text = string.Empty;
        password.Text = string.Empty;
    }
}


目前的问题是..我写的是,如果密码输入错误,则跳转到error.aspx.但是执行后,密码输入错误.也一点反应没有,只是停留在login.aspx.请大家帮忙看看怎么回事,谢谢了!!
name和password是文本框
button1是登陆按钮
button2是重置按钮