Sorting Data

C1FlexGrid supports sorting data directly using code. The following example code was taken from the sorting & filtering sample in the ControlExplorer installed with this product.

Note: The ControlExplorer sample is located in the C:\Documents and Settings\<username>\My Documents\ComponentOne Samples\Studio for Windows Phone or C:\Users\<username>\Documents\ComponentOne Samples\Studio for Windows Phone folder.

In this example, CollectionViewICollectionView.SortDescriptions are used to change the sort direction when the column header is tapped.

void flexgrid_Tap(object sender, C1GestureEventArgs e)

// detect tap and sort only if a column header was tapped

            var testInfo = flexgrid.HitTest(e);

            if (testInfo.CellType == CellType.ColumnHeader)

// get current column header property name

                SortGrid(flexgrid.Columns[testInfo.Column].BoundPropertyName);

   void SortGrid(string propertyName)

// If we have a sort description with the current property path, then we remove it from the collection and

// add a new one with the opposite sort direction (if we tap a column header twice, the sort direction changes).

// If we don´t have a sort description with the current property path, then we add it with ascending sort direction.

            var sortDescriptions = flexgrid.CollectionView.SortDescriptions;

            using (flexgrid.CollectionView.DeferRefresh())

                var sortDescription = sortDescriptions.FirstOrDefault(sd => sd.PropertyName.Equals(propertyName));

// if multiple selection is disabled, we always clear the collection

                if (!_allowMultipleSort)

                    sortDescriptions.Clear();

                if (string.IsNullOrEmpty(sortDescription.PropertyName))

sortDescription.PropertyName = propertyName;

sortDescription.Direction = ListSortDirection.Ascending;

                    sortDescriptions.Add(sortDescription);

else

                    sortDescriptions.Remove(sortDescription);

                    sortDescriptions.Add(newSortDescription(propertyName, sortDescription.Direction == ListSortDirection.Ascending ? ListSortDirection.Descending : ListSortDirection.Ascending));

You can disable grid sorting by setting the AllowSorting property to false, or disable it for specific columns by setting the Column.AllowSorting property to false.