Column header missing

[JP]

Hello,

I'm having an issue where the column header is missing when you add a column to the grid after it has initially been created.  I have created a sample project that demonstrates my issue, but it appears I can't attach it so I included the code at the end of this post.  To reproduce it, just click on the 'Add Column' button.  Am I doing something wrong in my code or is this a bug?

In my example I'm also calling Rebind() and UpdateLayout() on the grid after adding the column because if I don't then no data appears in the column, though the column itself is added.

Note: I borrowed the Custom and Order classes from a sample app on this forum.

Thanks,

Joel


Window1.xaml

<Window x:Class="AddColumnIssue.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    Title="Window1" Height="380" Width="701">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="30" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <Button x:Name="AddColumnButton" Grid.Row="0" Height="23" Width="75" Click="AddColumnButton_Click" >Add Column</Button>

        <telerik:RadGridView x:Name="ItemsGrid" Grid.Row="1" ItemsSource="{Binding}" AutoGenerateColumns="False" />
    </Grid>
</Window>

Window1.cs

    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
            AddColumns();
            this.DataContext = BuildCustomers();
        }

        private void AddColumnButton_Click(object sender, RoutedEventArgs e)
        {
            AddColumn(typeof(string), "Email", 200);
            RefreshGrid();
        }

        private void AddColumns()
        {
            AddColumn(typeof(int), "Number", 100);
            AddColumn(typeof(string), "Name", 100);
        }

        private void AddColumn(Type dataType, string name, int width)
        {
            GridViewDataColumn column = new GridViewDataColumn();
            column.DataType = dataType;
            column.HeaderText = name;
            column.UniqueName = name;
            column.Width = new GridLength(width);
            column.IsReadOnly = true;

            ItemsGrid.Columns.Add(column);
        }

        private void RefreshGrid()
        {
            ItemsGrid.Rebind();
            ItemsGrid.UpdateLayout();
        }

        private static ObservableCollection<Customer> BuildCustomers()
        {
            ObservableCollection<Customer> customers = new ObservableCollection<Customer>();
            ObservableCollection<Order> orders = new ObservableCollection<Order>();

            for (int i = 0; i < 10; i++)
                orders.Add(new Order { Number = i, Details = "Order" + i });

            for (int i = 0; i < 100; i++)
                customers.Add(new Customer { Email = "Mail" + i, Name = "Name" + i, Number = i, Orders = orders });

            return customers;
        }
    }

[Milan]

Hi Joel,

It seems that you have stumbled upon a bug in RadGridView. We are currently investigating the problem and we will keep you updated. If that bug is a show-stopper we could send you an unofficial build, once the issue is resolved. Your telerik points have been updated accordingly.

Thanks you for your patience.

Best wishes,
Milan
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[JP]

Hi Milan,

Thanks for your reply.  This is issue is not a show stopper, but I would like to be able to dynamically add columns in my app in the future.  If you could send me an unofficial build when the issue is resolved, that would be great.

Thanks,

Joel

[Milan]

Hi Joel,

I'm sending you the latest SP1 build. Yu should now be able to add/remove data columns dynamically.

Kind regards,
Milan
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.