I have two selections in my ComboBox and 3 RadioButtons. And I want to save my last RadioButton-Selection every time I switch my ComboBox.

So I need following: I have Item "Test1" and checked RadioButton 1. Now I switch to "Test 2" and RadioButton 1 should be saved at Test 1. When I switch back to "Test 1" RadioButton 1 should be checked, because it was "saved" before.

Hopefully it's clear what I meant. Thanks for helping me out in advance.

MainWindow.xaml

<RadioButton x:Name="RBTN1" GroupName="Test" Content="Test1"/>
<RadioButton x:Name="RBTN2" GroupName="Test" Content="Test2"/>
<RadioButton x:Name="RBTN3" GroupName="Test" Content="Test3"/>

<ComboBox x:Name="CMBBX" SelectionChanged="CMBBX_SelectionChanged" />

MainWindow.xaml.cs

public MainWindow()
  {
    InitializeComponent();
    CMBBX.Items.Add("Test 1");
    CMBBX.Items.Add("Test 2");
  }

private void CMBBX_SelectionChanged(object sender, SelectionChangedEventArgs e)
  {
  }

CodePudding user response：

private void CMBBX_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (CMBBX.SelectedIndex == 0)
        {
            RBTN1.IsChecked = true;
            RBTN2.IsChecked = false;
            RBTN3.IsChecked = false;
        }
        else if (CMBBX.SelectedIndex == 1)
        {
            RBTN1.IsChecked = false;
            RBTN2.IsChecked = true;
            RBTN3.IsChecked = false;
        }
    }

You can use this method for other situations too. I hope it'll be helpful for you!

CodePudding user response：

You could store the mappings between the selected item in the ComboBox and the selected RadioButton in a dictionary. This code should give you the idea:

public partial class MainWindow : Window
{
    private readonly Dictionary<string, RadioButton> _items = new Dictionary<string, RadioButton>();
    private string _selectedItem;

    public MainWindow()
    {
        InitializeComponent();
        _items.Add("Test 1", null);
        _items.Add("Test 2", null);
        CMBBX.ItemsSource = _items.Keys;
    }

    private void CMBBX_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        // save
        if (_selectedItem != null)
            _items[_selectedItem] = GetSelectedRadioButton();

        _selectedItem = CMBBX.SelectedItem as string;

        // restore
        if (_selectedItem != null 
            && _items.TryGetValue(_selectedItem, out RadioButton radioButton)
            && radioButton != null)
            radioButton.IsChecked = true;
    }

    private RadioButton GetSelectedRadioButton()
    {
        if (RBTN1.IsChecked == true)
            return RBTN1;
        if (RBTN2.IsChecked == true)
            return RBTN2;
        if (RBTN3.IsChecked == true)
            return RBTN3;

        return null;
    }
}