Reputation: 7579
So I've got three RadioButtons, They're not in a RadioButtonList because I need to add some textboxes next to each of them.
I've added a GroupName, and on the front end they behave as expected. ONLY ONE appears checked at a time.
However in the code, if I do:
RadioButton1.Checked = true;
RadioButton2.Checked = true;
RadioButton3.Checked = true;
I would expect only the last one, RadioButton3, to be checked, because they all belong to the same group. This is not the case. All three evaluate to true.... how can that be?
I have to set them explicitly to false... am I missing something?
Upvotes: 2
Views: 1913
Reputation: 47766
I think this is the correct behavior although it is not what you might expect.
Consider that a RadioButton
is just a CheckBox
with some extended functionality to automatically to give that exclusive checking functionality. In the background it is still a checkbox though. See the hierarchy from MSDN:
System.Object
System.Web.UI.Control
System.Web.UI.WebControls.WebControl
System.Web.UI.WebControls.CheckBox
System.Web.UI.WebControls.RadioButton
The output has all items with the attribute checked="checked"
output for the input
of type="radio"
. Eg:
<input id="rad1" type="radio" name="Test" value="rad1" checked="checked" /><label for="rad1">1</label><br />
<input id="rad2" type="radio" name="Test" value="rad2" checked="checked" /><label for="rad2">2</label><br />
<input id="rad3" type="radio" name="Test" value="rad3" checked="checked" /><label for="rad3">3</label>
From the Checked
property documenation:
Checked (inherited from CheckBox): Gets or sets a value indicating whether the CheckBox control is checked.
So the Checked
property acts just like the CheckBox
version with no functionality included to look for other controls in the same group and remove them which makes sense since it is a singular control.
Upvotes: 1