[Solved] Wrap header text in dynamic structured gridview

[Mark]

I have a radgridView that is based on  a pivot table, that is the number of columns is based on the query and cannot be defined. To do this I use your data table construct, this works fine however I need to wrap the text in the header, it is up to 500 characters long.

My latest attempt to fail is trying to apply a style to the header!

private void GridLoaded(Code.AppMessages.ListCompleteMessage.enMessage eMessage)
{
    if (eMessage == Code.AppMessages.ListCompleteMessage.enMessage.GenericTable)
    {
        RadGridView oDG = this.RGV1;//default to the element pivot
        if (vm.eCurrentView == ViewModels.TreePivotVM.enView.Label)
        {
            oDG = this.RGVLabel;//get the label pivot grid
        }
        foreach (GridViewColumn oCol in oDG.Columns)
        {

            oCol.Header = oCol.Header.ToString().Replace("_", " ");
            if (oCol.DisplayIndex == 0)
            {
                oCol.Width = Telerik.Windows.Controls.GridViewLength.Auto;
            }
            else
            {
                oCol.MaxWidth = 200;
                oCol.TextAlignment = TextAlignment.Right;
                //oCol.HeaderCellStyle = (Style)Application.Current.Resources["TelerikHeaderCellStyle"];
                oCol.CellStyle = (Style)Application.Current.Resources["TelerikReportCellStyle"];
            }
        }
    }
}

Any suggestions will be greatly appreciated. I would also like to format the numbers in the cells in columns > 0

[Pavel Pavlov]

Hi Mark ,

Your C# code seems OK. Can you please share the XAML with the style (TelerikHeaderCellStyle) so I can check what might be wrong.
Regarding the number formatting - data columns in RadGridView expose the DataFormatString property.

Regards,
Pavel Pavlov
the Telerik team

[Mark]

Certainly, my xaml skills are sadly lacking!

<!--This style is not working!-->
<Style x:Key="TelerikHeaderCellStyle" TargetType="telerik:GridViewHeaderCell">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="telerik:GridViewHeaderCell">
                <TextBlock Text="{Binding Column.UniqueName}" TextWrapping="Wrap" Height="Auto" TextAlignment="Left"/>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
    <Setter Property="Height" Value="Auto" />
</Style>

[Pavel Pavlov]

Hi Mark ,

Thanks for sending the template! Indeed it could be fixed but would involve much heavier XAML.
Can you please first check whether this approach would be applicable to your case ?

http://www.telerik.com/help/silverlight/gridview-howto-wrap-text-column-header.html 

Let me know in case this does not work for you.

Kind regards,
Pavel Pavlov
the Telerik team

[Mark]

Thanks Pavel, that approach will not work as I do not have any columns defined in the xaml (autogenerate) and the text is coming from the database.

[Vlad]

Hi,

 Auto-generated columns (and the Header property) can be accessed in AutoGeneratingColumn event. You can apply exactly the same approach for these columns as well. 

Greetings,
Vlad
the Telerik team

[Mark]

Mutter mutter grumble - dammed event does not fire!

The xaml

<telerik:RadGridView Grid.Row="1" x:Name="RGVLabel" Style="{StaticResource TelerikGridStyle}"
                                AutoGenerateColumns="True" AutoGeneratingColumn="ColumnCreate"
                                ItemsSource="{Binding LabelTable,Mode=OneWay}" IsReadOnly="True" />

The code behind - breakpoint is not hit!

private void ColumnCreate(object sender, GridViewAutoGeneratingColumnEventArgs e)
{
    GridViewColumn oCol = e.Column;
}

Note that I also have a post load process initiated by the ViewModel that loops through the created columns (in the first posting) that cannot format the textwrapping on the column header. It seems to me the ColumnCreate event will have the same problem - cannot get at the Column.Header.TextWrapping property to set it.