[Solved] How to provide DataContext to Cells of autogenerated columns (FrameworkElement)?

[Mikhail]

Good day. 

I use column auto-generation on the dynamic collection as a source.  Previous post link

But DataContext for generated Cell(FrameworkElement) is entire RowItem (System.Dynamic.ExpandoObject).

Thus, the problem is that the template does not know the names of the properties.

Therefore, I need to pass only one property to the datacontext of the cell and not the entire RowItem.

Maybe there is a way to somehow pass the binding on the current property for the entire column?

Or somehow in the code at generation of a cell to transfer to it the necessary datacotext property?

{

    public ObservableCollection<System.Dynamic.ExpandoObject> Items { get; set; }

}

 

<controls:RadDataGrid x:Name="TableViewRelatedObjects"

                    HorizontalAlignment="Stretch"

                    DataContext="{x:Bind ViewModel}"

                    ItemsSource="{x:Bind ViewModel.Items, Mode=OneWay}"

                    AutoGenerateColumns="True"

                    UserGroupMode="Disabled">

</controls:RadDataGrid>

 

private DataTemplateSelector _fieldTemplateSelector;

public CustomGenerateColumnCommand(DataTemplateSelector fieldTemplateSelector)
{
    this.Id = Telerik.UI.Xaml.Controls.Grid.Commands.CommandId.GenerateColumn;

    _fieldTemplateSelector = fieldTemplateSelector;
}

public override bool CanExecute(object parameter)
{
    var context = parameter as GenerateColumnContext;
    // put your custom logic here
    return true;
}

public override void Execute(object parameter)
{
    var context = parameter as GenerateColumnContext;
    var template = _fieldTemplateSelector.SelectTemplate(context.PropertyName);

    var column = new DataGridTemplateColumn()
        {
            CellContentTemplate = template
        };

    context.Result = column;
    return;
    };
}

 

[Didi]

Hi Mikhail,

I have created a sample example how to create a DataGridTemplateColumn and how to set the DataTemplateSelector to this column. Please take a look at the attached project inside this files: CustomDataTemplateSelector.cs, CustomGenerateColumnCommand.cs and MainPage.xaml.

I hope this could help.

Regards,
Didi
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