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Priyam
450
Unable to change RowSelectorHeaderAppearance Image
posted

Hello Team,

I am trying to add an image to RowSelectorHeaderAppearance but somehow I am unable to do so. Please guide.

void DropDownGrid_InitializeLayout(object sender, InitializeLayoutEventArgs e)
{
e.Layout.Override.RowSelectorHeaderStyle = Infragistics.Win.UltraWinGrid.RowSelectorHeaderStyle.SeparateElement;
Image img = com.st.common.Properties.Resources.BlueFilter;
e.Layout.Override.RowSelectorHeaderAppearance.Image = img;
//e.Layout.Bands[0].Override.RowSelectorHeaderStyle = RowSelectorHeaderStyle.SeparateElement;
//e.Layout.Bands[0].Override.RowSelectorHeaderAppearance.Image = img;
}

void DropDownGrid_MouseDown(object sender, MouseEventArgs e)
{
Infragistics.Win.UltraWinGrid.UltraGrid grid = sender as Infragistics.Win.UltraWinGrid.UltraGrid;
if (grid != null)
{
UIElement element = grid.DisplayLayout.UIElement.LastElementEntered;
if (element != null)
{
UIElement rowSelectorHeaderElement = element.GetAncestor(typeof(RowSelectorHeaderUIElement)) as RowSelectorHeaderUIElement;
if (rowSelectorHeaderElement != null)
{
PerformFilter();
}
else
return;
}
else
return;
}
}

  • 469350
    Suggested Answer
    Offline posted

    Hi,

    The RowSelectorHeader element doesn't support an image by default. But you could display one using a CreationFilter.

    The CreationFilter code looks something like this: 

    


            public class RowSelectorHeaderImageCreationFilter : IUIElementCreationFilter
            {
                private Image image;

                public RowSelectorHeaderImageCreationFilter(Image image)
                {
                    this.image = image;
                }


                void IUIElementCreationFilter.AfterCreateChildElements(UIElement parent)
                {
                    
                }

                bool IUIElementCreationFilter.BeforeCreateChildElements(UIElement parent)
                {
                    if (parent is RowSelectorHeaderUIElement)
                    {
                        var imageElement = parent.GetDescendant(typeof(ImageUIElement)) as ImageUIElement;
                        if (null == imageElement)
                            imageElement = new ImageUIElement(parent, this.image);
                        else
                            imageElement.Image = image;


                        imageElement.CenterImage = true;
                        imageElement.Rect = parent.RectInsideBorders;
                        parent.ChildElements.Add(imageElement);
                        return true;
                    }

                    return false;
                }
            }

    And you hook it up to the grid like so:

    

    this.ultraGrid1.CreationFilter = new RowSelectorHeaderImageCreationFilter(img);