ASP.NET C# Web application - CheckBoxes

Question

I have two checkboxes, what I want to do is, when I check one, the other should be disabled, I always do this in C# Windows application and it is my first try with ASP.NET is there a way to do that without using combocheckboxes? here is my method which does not work:

protected void checkplan0_CheckedChanged(object sender, EventArgs e)
{
    if (checkplan0.Checked == true)
    {
        checkplan1.Enabled = false;
    }
    if (checkplan0.Checked == false)
    {
        checkplan1.Enabled = true;

    }
}

So are you getting any error ?, or what else ?

gkrishy
– gkrishy

2014-07-05 11:55:12 +00:00
Commented Jul 5, 2014 at 11:55 — gkrishy
– gkrishy, Commented Jul 5, 2014 at 11:55
No error, it is just not doing anything.

user3345212
– user3345212

2014-07-05 11:58:28 +00:00
Commented Jul 5, 2014 at 11:58 — user3345212
– user3345212, Commented Jul 5, 2014 at 11:58
Check the answers. It might help you.

gkrishy
– gkrishy

2014-07-05 11:59:09 +00:00
Commented Jul 5, 2014 at 11:59 — gkrishy
– gkrishy, Commented Jul 5, 2014 at 11:59

Phritzy · Accepted Answer · 2014-07-06 02:04:52Z

2

Like others have said you'll need to have autopostback="true", also it might be worth considering using radio buttons, as only one radio button in a group can be checked at a time.

<asp:RadioButton id="radioplan0" Checked="True" GroupName="RadioPlan" runat="server" Autopostback="true" />
<asp:RadioButton id="radioplan1" Checked="False" GroupName="RadioPlan" runat="server" Autopostback="true" />

Then nothing needs to be added to the code behind to toggle the other options off.

answered Jul 6, 2014 at 2:04

Phritzy

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Comments

yogi · Accepted Answer · 2014-07-05 11:57:27Z

1

Your code seems to be correct, as you mentioned that you are from windows form background I assume this is what you are missing

<asp:CheckBox 
      ID="checkplan0" 
      runat="server" 
      AutoPostBack="true" 
      OnCheckedChanged="checkplan0_CheckedChanged" />

Set AutoPostBack = "true" setting this true will mean on check of checkbox a postback will be sent to server and the code that you have written on Check Change will execute.

answered Jul 5, 2014 at 11:57

yogi

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2 Comments

user3345212 Over a year ago

Thank you. I have one question, since the checkbox is actually at the bottom of the page, when I click check for example, it always takes me to the top of the screen, is there away I can prevent that and stay where I am at the page? Thank you again.

yogi Over a year ago

Yes, you need to set maintainscrollposition read this article msdn.microsoft.com/en-us/library/…

Ehsan Sajjad · Accepted Answer · 2014-07-05 12:15:46Z

0

Your code seems good. But as you are beginner. You might be missing simple thing in source page.

=> Check whether Your AutoPostBack set to true for your checkbox. If not add AutoPostBack ="true"

edited Jul 5, 2014 at 12:15

Ehsan Sajjad

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answered Jul 5, 2014 at 11:57

gkrishy

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