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Setting Groups Programmatically

Overview

RadGridView has a GroupDescriptors property at the GridViewTemplate level which is exposed in RadGridView class for MasterTemplate instance. This collection allows you to use descriptors which define the grouping criteria and the group's sorting direction for the data that is bound to the RadGridView.

As this is a collection, you are able not only to add, but to remove or clear its entries as well. Adding descriptors to the collection makes the current view display the items sorted and divided into groups.

Using GroupDescriptors

Using simple group descriptor

GroupDescriptor descriptor = new GroupDescriptor();
descriptor.GroupNames.Add("Country", ListSortDirection.Ascending);
this.radGridView1.GroupDescriptors.Add(descriptor);

Dim descriptor As New GroupDescriptor()
descriptor.GroupNames.Add("Country", ListSortDirection.Ascending)
Me.RadGridView1.GroupDescriptors.Add(descriptor)

gridview-grouping-setting-groups-programmatically 001

The GroupNames property defines the property, by which the data will be grouped. The GroupNames is a SortDescriptorCollection and defines group names for one grouping criteria.

RadGridView supports grouping using one or more property names. The following example demonstrates how you can group by two properties:

Grouping by more than one column name

GroupDescriptor descriptor1 = new GroupDescriptor();
descriptor1.GroupNames.Add("Country", ListSortDirection.Ascending);
descriptor1.GroupNames.Add("ContactTitle", ListSortDirection.Descending);
this.radGridView1.GroupDescriptors.Add(descriptor1);

Dim descriptor1 As New GroupDescriptor()
descriptor1.GroupNames.Add("Country", ListSortDirection.Ascending)
descriptor1.GroupNames.Add("ContactTitle", ListSortDirection.Descending)
Me.RadGridView1.GroupDescriptors.Add(descriptor1)

gridview-grouping-setting-groups-programmatically 002

RadGridView supports grouping on one or more levels. The following example demonstrates how you can group on two levels:

Grouping on one or more levels

GroupDescriptor descriptor2 = new GroupDescriptor();
descriptor2.GroupNames.Add("Country", ListSortDirection.Ascending);
GroupDescriptor descriptor3 = new GroupDescriptor();
descriptor3.GroupNames.Add("ContactTitle", ListSortDirection.Ascending);
this.radGridView1.GroupDescriptors.Add(descriptor2);
this.radGridView1.GroupDescriptors.Add(descriptor3);

Dim descriptor2 As New GroupDescriptor()
descriptor2.GroupNames.Add("Country", ListSortDirection.Ascending)
Dim descriptor3 As New GroupDescriptor()
descriptor3.GroupNames.Add("ContactTitle", ListSortDirection.Ascending)
Me.RadGridView1.GroupDescriptors.Add(descriptor2)
Me.RadGridView1.GroupDescriptors.Add(descriptor3)

gridview-grouping-setting-groups-programmatically 003

See Also

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