去看看Microsoft Quick Start
http://chs.gotdotnet.com/quickstart/default.aspxhttp://chs.gotdotnet.com/quickstart/aspplus/default.aspx?url=/quickstart/aspplus/doc/formsauth.aspx
http://chs.gotdotnet.com/quickstart/default.aspxhttp://chs.gotdotnet.com/quickstart/aspplus/default.aspx?url=/quickstart/aspplus/doc/formsauth.aspx
OleDbSelectCommand1.CommandText = "SELECT User,Pass, Rights FROM UserList WHERE User = '" & TextBox1.Text & "' and pass='" & TextBox2.Text & "'"
DataSet11.Tables("userlist").Clear()
OleDbDataAdapter1.Fill(DataSet11, "userlist")
If DataSet11.Tables("userlist").Rows.Count > 0 Then
Label1.Text = "您已经成功登录"
Else
Label1.Text = "密码或用户名错误,请重新登录"
End If
End Sub