GroupHeaderConverter Property

In This Topic

Gets or sets the Windows.UI.Xaml.Data.IValueConverter used to create the content shown in GroupRow cells to summarize group information.

Syntax

Visual Basic
C#

'Declaration
 
Public Property GroupHeaderConverter As IValueConverter

public IValueConverter GroupHeaderConverter {get; set;}

Remarks

By default, the grid creates group headers that show the name of the property being grouped on, the value of the property, and the number of items in the group.

You can modify or customize this information by defining your own group header converter class and assigning an instance of this class to the grid's GroupHeaderConverter property.

Example

The example below shows the default group header converter class implementation.

class GroupHeaderConverter : IValueConverter
{
  public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  {
    var gr = parameter as GroupRow;
    var group = gr.Group;
    if (group != null && gr != null && targetType == typeof(string))
    {
      var desc = gr.Grid.CollectionView.GroupDescriptions[gr.Level] as PropertyGroupDescription;
      return desc != null
        ? string.Format("{0}: {1} ({2:n0} item{3})", 
            desc.PropertyName, 
            group.Name, 
            group.ItemCount, 
            group.ItemCount == 1 ? string.Empty : "s")
        : string.Format("{0} ({1:n0} items)", group.Name, group.ItemCount);
    }
      
    // default
    return value;
  }
  public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  {
    return value;
  }
}

Reference

C1FlexGrid Class
C1FlexGrid Members