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Validator for checkbox 1
- Thread starter James1981
- Start date
- Thread starter
- #3
The checkbox is to confirm that the user has read the terms and conditions. There is no validator that will handle checkboxes - i've checked. I have decided to use code-behind instead, and check the value of the checkbox in question before submitting the form.
Cheers
James
Cheers
James
-
1
- #4
Why not disable the button, and then with Javascript enable the button on the click event of the check box.
Here is some a simple sample to help you get started:
Web page:
---------
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb" Inherits="CheckBoxTest.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio.NET 7.0" name="GENERATOR">
<meta content="Visual Basic 7.0" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content=" name="vs_targetSchema">
<script language="javascript">
function EnableButton()
{
document.Form1.Button1.disabled=false;
}
</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:button Enabled=False id="Button1" style="Z-INDEX: 101; LEFT: 259px; POSITION: absolute; TOP: 154px" runat="server" Text="Button"></asp:button>
<asp:CheckBox id="CheckBox1" style="Z-INDEX: 102; LEFT: 264px; POSITION: absolute; TOP: 190px" runat="server" Text="Enable Button" ></asp:CheckBox></form>
</body>
</HTML>
Code Behind:
Public Class WebForm1
Inherits System.Web.UI.Page
Protected WithEvents CheckBox1 As System.Web.UI.WebControls.CheckBox
Protected WithEvents Button1 As System.Web.UI.WebControls.Button
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
Me.CheckBox1.Attributes.Add("onClick", "javascript:EnableButton()"
End Sub
End Class
Here is some a simple sample to help you get started:
Web page:
---------
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb" Inherits="CheckBoxTest.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio.NET 7.0" name="GENERATOR">
<meta content="Visual Basic 7.0" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content=" name="vs_targetSchema">
<script language="javascript">
function EnableButton()
{
document.Form1.Button1.disabled=false;
}
</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:button Enabled=False id="Button1" style="Z-INDEX: 101; LEFT: 259px; POSITION: absolute; TOP: 154px" runat="server" Text="Button"></asp:button>
<asp:CheckBox id="CheckBox1" style="Z-INDEX: 102; LEFT: 264px; POSITION: absolute; TOP: 190px" runat="server" Text="Enable Button" ></asp:CheckBox></form>
</body>
</HTML>
Code Behind:
Public Class WebForm1
Inherits System.Web.UI.Page
Protected WithEvents CheckBox1 As System.Web.UI.WebControls.CheckBox
Protected WithEvents Button1 As System.Web.UI.WebControls.Button
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
Me.CheckBox1.Attributes.Add("onClick", "javascript:EnableButton()"
End Sub
End Class
- Thread starter
- #5
Thanks for the advice... I decided just to do a check within the code behind for the onclick event of the button to make sure that the checkbox was checked.
If the unchecked I would display and error message and not allow the user to continue. This seemed to be the easiest solution.
Thanks again,
James
If the unchecked I would display and error message and not allow the user to continue. This seemed to be the easiest solution.
Thanks again,
James
my $.02...
users prefer client side stuff, rather than being told after they've submitted a form that they did something wrong. The disable/enabling the button is an easy, clever way to do it, and is how i handle those situations.
just my opinion.
users prefer client side stuff, rather than being told after they've submitted a form that they did something wrong. The disable/enabling the button is an easy, clever way to do it, and is how i handle those situations.
just my opinion.
- Thread starter
- #7
Hi gagz,
I do admit you have a point, so i tried to implement your suggestion... I cam accross a problem tho as the checkbox doesn't seem to trigger it's checkchanged method once it is clicked by the user.
Here is the code:
private void chkTerms_CheckedChanged(object sender, System.EventArgs e)
{
if (chkTerms.Checked == true)
btnNext_4.Enabled = true;
else
btnNext_4.Enabled = false;
}
Have you come across this problem?
Cheers
James
I do admit you have a point, so i tried to implement your suggestion... I cam accross a problem tho as the checkbox doesn't seem to trigger it's checkchanged method once it is clicked by the user.
Here is the code:
private void chkTerms_CheckedChanged(object sender, System.EventArgs e)
{
if (chkTerms.Checked == true)
btnNext_4.Enabled = true;
else
btnNext_4.Enabled = false;
}
Have you come across this problem?
Cheers
James
- Thread starter
- #9
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