how to create asp.net validation?
Hi guys!
i've got this asp.net page that calculate 2 integer and add both of them to get the new value and it is working. Now i want to add in a validation that check for the 1st textbox to see if it is empty or not. If it is empty then it will pop out a msg saying that it is empty. I think i did it correctly buy it seems to show an error when i try to run it. I will attach the code here and please have a look.
Code:
<%@ Page Language="VB" %>
<html>
<script language="vb" runat="server">
Sub SubmitBtn_Click(Sender as object, E as EventArgs)
if text1.text = "" then
msgbox("empty")
else
result.Text = val(Text1.text) + val(Text2.text)
end if
End Sub
</script>
<head>
<title>Calculation</title>
<link rel="stylesheet"href="intro.css">
</head>
<body>
<center>
<form action="calulate.aspx" method="post" runat=server>
<h3> Number 1: <asp:TextBox id="text1" runat="server"/>
Number 2: <asp:TextBox id="text2" runat="server"/>
</h3>
<p> <b>Answer Is:</b> <asp:TextBox id="result" runat="server"/>
</p>
<p>
<asp:Button text="Calculate" onClick="SubmitBtn_Click" runat="server"/>
</p>
</form>
</center>
</body>
</html>
can any 1 help me solve this problem? I'm still learning asp.net. THe validation check i did is in
Code:
Sub SubmitBtn_Click(Sender as object, E as EventArgs)
if text1.text = "" then
msgbox("empty")
else
result.Text = val(Text1.text) + val(Text2.text)
end if
End Sub
with the if else statement. Please have a look and help me. Thanks.
