FlexSheet for WPF | ComponentOne
C1.WPF.FlexGrid Namespace / C1FlexGrid Class / GroupHeaderConverter Property
Example

In This Topic
    GroupHeaderConverter Property
    In This Topic
    Gets or sets the System.Windows.Data.IValueConverter used to create the content shown in GroupRow cells to summarize group information.
    Syntax
    '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;
      }
    }
    See Also