How to change the default style of DataGridComboBoxColumn?

[Diyari-Kurdi]

How can i style a DataGridComboBoxColumn with AutoGenerateColumns set to True?

<DataGrid
          AutoGenerateColumns="True"
          ItemsSource="{Binding Items}"/>

[nicolaihenriksen]

@Diyari-Kurdi When you let the DataGrid auto-generate columns rather than explicitly defining them in XAML, you're effectively cutting specialized MDIX columns out of the loop. However, there is still a hook you can use to obtain what I believe you're going for.

My assumption from your sample is that the underlying data source for the "Continents" column is an enum. If so, you can attach the hook to your data grid like this:

<DataGrid AutoGenerateColumns="True"
          AutoGeneratingColumn="DataGrid_OnAutoGeneratingColumn"
          ... />

Then in your code-behind you can implement the hook in a manner like this:

private void DataGrid_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    if (e.PropertyType.IsEnum)
    {
        e.Column = new MaterialDesignThemes.Wpf.DataGridComboBoxColumn { Header = e.Column.Header, ItemsSource = Enum.GetValues(e.PropertyType) };
    }
}

There may still be some things with data binding and such that you need to iron out. This is just ensuring that you visually get the MDIX style for the ComboBox.

For more information on the topic, you can go here:
https://learn.microsoft.com/en-us/windows/communitytoolkit/controls/datagrid_guidance/customize_autogenerated_columns

[Diyari-Kurdi]

@nicolaihenriksen Thank you sir.

[nicolaihenriksen]

@Keboo The library does setup default styles for some auto-generated columns (CheckBox and Text - see here), it may be worth considering if other column types should be added to this (like for example the ComboBox column)?

[Keboo]

Yep agreed, I like what you are doing in your draft PR so we can work from there.