RadioButton.Checked Error: Control.Checked cannot appear on the left hand side of += or -=

Question

I am having the strangest problem, and I have to be missing something.

Here is my code that is causing the error.

if (radLot.Checked == true)
{
    S         


        

Answer 1

Checked is the name of the event that is raised when a ToggleButton is checked. (The RadioButton class derives from ToggleButton.)

I assume you want to access the IsChecked property, which gets (or sets) whether the ToggleButton is checked.

if (radLot.IsChecked == true)
{
    SymbolSpecification = "LotRenderer";
}

Hint: Most boolean properties related to the visual state start with Is— in WPF.

Answer 2

Alternative you can check the CheckState to perform your statement.

 if (radLot.CheckState == CheckState.Checked)
            {

            }

Edit: This will only work when writing a winform application. It will not work with WPF. Use Douglas' answer for WPF.

Answer 3

This is indeed true - just hit this problem myself converting from Winforms to WPF.

In WPF using:

if (radiobutton1.IsChecked == true)

works

BUT

if (radiobutton1.IsChecked)

Does not.

However in WinForms

if (radiobutton1.Checked)

works but does not in WPF.