datagridcomboboxcolumn binding in code

Question

I'd like to do this entirely in code, no XAML: Given are

DataGridComboBoxColumn myDGCBC = new DataGridComboBoxColumn();
ObservableCollection<string> DataSource = new ObservableCollection<string>{"Option1", "Option2"};
myDGCBC.ItemsSource = DataSource;

ObservableCollection<MyStructure> MyObject = new ObservableCollection<MyStructure>;

and

public class MyStructure
{
   ... several properties ... // pseudocode, obviously
   public string SelectedValue { get; set; }
}

I am interested in (binding) receiving the selected values from all the comboxboxes in the column into the SelectedValue property.

I tried several ideas from SO, but to no avail.

Help! Thanks.

@Bahman_Aries, thanks for the edit. Typo in copying from another computer. — Gabe, Aug 25 '15 at 18:26

Bahman_Aries · Accepted Answer · 2015-08-25T18:47:44.190

Assuming a DataGird is already defined in xaml, you should set proper bindings for both DataGrid and DataGridComboBoxColumn.

Here is an example to give you an idea:

Xaml:

<Grid >
    <Grid.RowDefinitions>
        <RowDefinition Height="*"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <DataGrid x:Name="myGrid" AutoGenerateColumns="False"/>
    <Button Grid.Row="1"  Content="test" Click="Button_Click"/>
</Grid>

MainWindow.cs:

    //DataGrid ItemsSource
    public ObservableCollection<MyStructure> DataSource { get; set; }

    public MainWindow()
    {
        InitializeComponent();
        DataContext = this;

        // Initializing DataGrid.ItemsSource
        DataSource = new ObservableCollection<MyStructure>();
        DataSource.Add(new MyStructure());

        // Creating new DataGridComboBoxColumn 
        DataGridComboBoxColumn myDGCBC = new DataGridComboBoxColumn();
        myDGCBC.Header = "cmbColumn";

        // Binding DataGridComboBoxColumn.ItemsSource and DataGridComboBoxColumn.SelectedItem
        var cmbItems = new ObservableCollection<string> { "Option1", "Option2" };
        myDGCBC.ItemsSource = cmbItems;
        myDGCBC.SelectedItemBinding = new Binding("SelectedValue");
        // Adding DataGridComboBoxColumn to the DataGrid
        myGrid.Columns.Add(myDGCBC);

        // Binding DataGrid.ItemsSource 
        Binding binding = new Binding();
        binding.Source = DataSource;
        BindingOperations.SetBinding(myGrid, DataGrid.ItemsSourceProperty, binding);
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        //This is just to check whether SelectedValue is set properly:
        string selectedValue = DataSource[0].SelectedValue;
    }

First, thanks. Would you be so kind as to do this without MVVM? — Gabe, Aug 25 '15 at 18:41
Actually It's not Mvvm at all! : ) however I modified my answer and removed some unnecessary parts. Please take a look and tell me whether it's helpful. — Bahman_Aries, Aug 25 '15 at 18:55
`myDGCBC.SelectedItemBinding = new Binding("SelectedValue");` or `myDGCBC.SelectedValueBinding = new Binding("SelectedValue");`? — Gabe, Aug 26 '15 at 05:25
You are welcome, btw, both `SelectedItemBinding` and `SelectedValueBinding` works, depending on the need. — Bahman_Aries, Aug 26 '15 at 07:09

datagridcomboboxcolumn binding in code

1 Answers1