More on Binding an Enum to radiobutton

I was playing around with my program and tried adding a group of four radio buttons. I found that the second group interfered with the first. So I put the second group in a stackpanel, and everything worked! One more thing, in my isClicked method I didn't show that I have this:

if (skipcheck)
{

   return;

}

where skipcheck is a bool that is set to true until the initialization is done. This stops an exception. This is a very nice method to use, and easy.

Binding an Enum to radiobuttons

I have a WPF project that uses radio buttons to exclusively choose between three options. There was a lot of code to decide which radio was pushed. Thanks to a blog post by Todd Davis, I got binding working on the radio buttons.

Suppose you have an Enum that corresponds to your radio buttons, and then set up a dependency property on it.

public enum KmlFileTypes

{

Simple,

Slider,

Splits

}

public static readonly DependencyProperty MkftProperty =

DependencyProperty.Register("Mkft",

typeof(KmlFileTypes),

typeof(MainWindow));

public KmlFileTypes Mkft

{

get { return (KmlFileTypes)GetValue(MkftProperty); }

set { SetValue(MkftProperty, value); }

}

The binding works because of a enum to boolean converter:

public class EnumToBooleanConverter : IValueConverter

{

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

{

return (value.ToString() == parameter.ToString());

}

public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

{

return (bool)value ? Enum.Parse(targetType, parameter.ToString(), true) : null;

}

}

then all you have to do is declare the radio buttons in the xaml:

RadioButton

Margin="20,20,0,0"

Content="Simple Path"

IsChecked="{Binding Mkft, ElementName=Utils, ConverterParameter=Simple, Converter= {StaticResource enumToBool}, Mode=TwoWay}"

Checked="isClicked"

VerticalAlignment="Top"

HorizontalAlignment="Left"

Width="80"

Height="24" />

This is just one of the three radio buttons, but you will notice that there is no group involved, and you do not need to name them.

The code for isClicked is:

private void isClicked(object sender, RoutedEventArgs e) //get the radiobutton that was pushed

{

textBox2.Text = ((int)Mkft).ToString(); //display the radio button name

Properties.Settings.Default.KmlFileType = (int)Mkft; //save the radio button selection

}

If you want to have one of the buttons pushed, based on user settings, do this in your initialization:

Mkft = (KmlFileTypes)Properties.Settings.Default.KmlFileType;

This couldn't be easier, and it just works!