希望有人能给个我用户登陆程序，谢谢！

Question

谢谢

Answer 1

private void checkall(object sender, System.EventArgs e)
{ 
if (box1.Text=="") { Page.RegisterStartupScript("messagebox","<script language=javascript>       alert ('请输入用户名！'); <"+"/"+"script>");return;}
if (box2.Text=="") {Page.RegisterStartupScript("messagebox","<script language=javascript>       alert ('请输入密码！'); <"+"/"+"script>");return;}
else
    {string Conn="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+Server.MapPath("view.mdb")+";";
OleDbConnection myconn=new OleDbConnection(Conn);
myconn.Open();
    OleDbCommand cmd=new OleDbCommand("SELECT  *  FROM [user] WHERE username='"+box1.Text+"'",myconn);  
          OleDbDataReader reader=cmd.ExecuteReader(); 
if(reader.Read())
{
  if(box2.Text==Convert.ToString(reader["password"]))
                
{
        Session["level"]=reader["level"];
        Session["name"]=reader["name"];
        Session["password"]=reader["password"];
Session["type"]=reader["type"];
Session["jihuacaigou"]=box1.Text;
        reader.Close();
            myconn.Close() ;
            Response.Redirect("Index_New.asp");
            }

  else
             {Page.RegisterStartupScript("messagebox","<script language=javascript>       alert ('用户名或密码不正确,请核对！'); <"+"/"+"script>");
                reader.Close();
                myconn.Close() ;return;
         }
 }
  else
             {Page.RegisterStartupScript("messagebox","<script language=javascript>       alert ('用户名或密码不正确,请核对！'); <"+"/"+"script>");
                reader.Close();
                myconn.Close() ;return;
         }
}
            
}