[Solved] Group headers

[Patrik]

Hello Telerik, I have a question regarding group headers on gridviews.

As illustrated by my screenshot, the group header is the DataFormatString of my grouped column. How can I make it displaying formatted data instead? The column is the data type DateTime? (nullable datetime), and I suspect that's the reason why, but I must have it in nullable format for it to work in other controls. Can I somehow handle how the group header is created?

regards,
Patrik Edberg

[Pavel Pavlov]

Hi Patrik,

Please paste me the code or XAML you use to set the format string so I can check what may have gone wrong.

Best wishes,
Pavel Pavlov
the Telerik team

[Patrik]

Hello, the gridview is declared like this:

<telerik:RadGridView
                        AutoGenerateColumns="True"
                        BorderThickness="0"
                        ShowGroupPanel="False"
                        RowIndicatorVisibility="Collapsed"
                        CanUserInsertRows="False"
                        CanUserDeleteRows="False"
                        CanUserSortColumns="True"
                        IsFilteringAllowed="True"
                        ItemsSource="{Binding Items}"
                        SelectedItem="{Binding SelectedItem, Mode=OneWay}"
                        SelectionChanged="RadGridView_SelectionChanged"
                        AutoGeneratingColumn="RadGridView_AutoGeneratingColumn"
                        RowActivated="RadGridView_RowActivated"
                        />

And in the RadGridView_AutoGeneratingColumn method, I do the following:

private void RadGridView_AutoGeneratingColumn(object sender, GridViewAutoGeneratingColumnEventArgs e)
{
    PropertyInfo property = typeof(ProductsGridItem).GetProperty(e.Column.UniqueName);
    if (property == null)
    {
        e.Cancel = true;
        return;
    }

    GridViewDataColumn column = e.Column as GridViewDataColumn;

    if (property.PropertyType == typeof(DateTime?) || property.PropertyType == typeof(DateTime))
    {
        column.DataFormatString = "yyyy-MM-dd ddd";
    }
}

Please note that I have removed irrelevant code from this method for sake of clarity. Actually I'm reading the format string from attributes set on properties on the class ProductsGridItem.

[Pavel Pavlov]

Hello Patrik,

Please try setting the format string as follows:

DataFormatString=@"{0:yyyy-MM-dd ddd}"

This should fix the problem .

It seems we have some "smart" logic that adds the missing to the format symbols for the cells. That is why the cells manage to show the date.  We are going to include this logic to the group headers as well.

Greetings,
Pavel Pavlov
the Telerik team

[Patrik]

Thanks for the answer. It worked!

/P