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ASP.NET Interacting

In the old style ASP, to validate the information that the user has entered required the code to be on another page to the page that had designed the page. In ASP.NET, it now works along the lines of a VB form. Code that deals with what the user has entered is on the same page as the HTML. Consider a page that has a simple log on script, one that validates the user has entered GREEN1 as the user name and GREEN2 as the password. Only when the condition has been met does the user access the next page PAGE2.aspx Below is how it could be done. ASP.NET does have advanced authentication routines but that is beyond this page. 

<HTML>
    <script language=VB runat=server>
        
        sub ValidateBtn_Click(sender as object, e as EventArgs)
            if txtUser.text="GREEN1" and txtPass.text="GREEN2" then
                Response.Redirect("PAGE2.aspx")
            else
                lblMessage.text = "Incorrect Username and password."
            end if
        end sub

    </script>

    <Body>
    
        <ASP:Label id=lblMessage runat=server />
    
        <Form runat="server">
        <Table width=100%>
        <TR><TD>User name</TD><TD><ASP:TextBox id=txtUser runat=server /></TD></TR>
        <TR><TD>Password</TD><TD><ASP:TextBox id=txtPass runat=server /></TD></TR>
        <TR><TD><ASP:Button text="Validate" OnClick="ValidateBtn_Click" runat=server /></TD><TD>< ></TD></TR>
        </Table>
        </Form>
    </Body>
</HTML>


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