In ASP.Net, will radio buttons in the same group change Checked state automaticlly?

Question

There are 2 radio buttons in the same group on the page: ``` ``` In the code behined, I write the code to check both radio buttons: ``` RadioButton1.Checked = true; RadioButton2.Checked = true; ``` I thought the `RadioButton1.Checked` will be `false` because they are in the same group, when I check the second one, the first one will automaticlly uncheck. But actually, they are both `Checked=true`. In my application, there is a switch-case like this: ``` // Some code to check the default RadioButton switch(val){ case 1: RadioButton1.Checked = true; case 2: RadioButton2.Checked = true; } ``` So sometimes both radio buttons' `Checked` will be true. That's odd, so I changed the code to: ``` switch(val){ case 1: RadioButton1.Checked = true; RadioButton2.Checked = false; case 2: RadioButton1.Checked = false; RadioButton2.Checked = true; } ``` This wor…

Accepted Answer

Rather than a `switch` statement, you'd probably be better off with:

```
RadioButton1.Checked = (val == 1);
RadioButton2.Checked = (val == 2);
RadioButton3.Checked = (val == 3);
// and so on ...
RadioButton10.Checked = (val == 10);
```

This way, everything gets set to `false` except for the `RadioButton` equal to `val`. If you had a huge amount of `RadioButton` controls, maybe you'd want to put them in an array and loop through that instead.

In ASP.Net, will radio buttons in the same group change Checked state automaticlly?

Solution

Problem