Binding and save radiobutton value

Question

Hi All.

I have problem to save value of radiobutton to dataset

In XAML

<RadioButton Name="PhoneRadioButton" GroupName="Method"
 IsChecked="{Binding Path=Field2, Mode=TwoWay,
 ConverterParameter=true}" Grid.Column="2"
 Foreground="#FF4D4D4D" FontWeight="Normal"
 FontStretch="Normal" FontFamily="Verdana" FontSize="11"
 VerticalAlignment="Center" HorizontalAlignment="Left"
 Width="150">Phone
</RadioButton>

In VB code for Save button procedure I try to save string value if radiobutton checked

If (PhoneRadioButton.IsChecked) Then
 Field3 = "By Phone"
End If

 

What is wrong?

Thanks

Answer 1

It looks like the XAML is using some value converter, could you give the detials for the converter?

e.g. Does the converter can convert boolean <> string ?

Answer 2

Hi eugzl,

I made a small demo on how converter could be used in this case.

namespace WpfApplication1.Converters
{
   public class Converters : System.Windows.Data.IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string str = (string)value;
            if (str == "By Phone" && parameter.ToString() == "phone") return true;
            if (str == "By Others" && parameter.ToString() == "other") return true;
            else return false;
        }
        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            bool isChecked=false;
            if (value != null)
                isChecked = (bool)value;
            if (isChecked && parameter.ToString()=="phone") return "By Phone";
            if (isChecked && parameter.ToString() == "other") return "By Others";
            else return "By Others";
        }
    }
}

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for Window2.xaml
    /// </summary>
    public partial class Window2 : Window
    {
        Item item = new Item();
        public Window2()
        {
            InitializeComponent();
            this.DataContext = item;
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show(item.Field);
        }
    }
    public class Item
    {
        public string Field
        {
            get;
            set;
        }
    }
   
}

Xaml:

<Window x:Class="WpfApplication1.Window2"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:converter="clr-namespace:WpfApplication1.Converters"
        Title="Window2"  Height="300" Width="300">
    <StackPanel>
        <StackPanel.Resources >
            <converter:Converters x:Key="BooleanToStringValueConverter"/>
        </StackPanel.Resources>
        <RadioButton Content="By Phone"  IsChecked="{Binding Path=Field, Mode=TwoWay, Converter={StaticResource BooleanToStringValueConverter}, ConverterParameter=phone}"/>
        <RadioButton Content="By Others" IsChecked="{Binding Path=Field, Mode=TwoWay, Converter={StaticResource BooleanToStringValueConverter}, ConverterParameter=other}"/>
        <Button Content="Button" Click="button1_Click" />
    </StackPanel>
</Window>

Best Regards,

---

Kee Poppy [MSFT]
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