DashboardLayoutGroup Class

using System;
using System.Linq;
using DevExpress.XtraEditors;
using DevExpress.DashboardCommon;
using DevExpress.DashboardWin;
//...
            Dashboard dashboard = new Dashboard();
            dashboard.LoadFromXml(@"Data\LayoutUnordered.xml");
            dashboard.BeginUpdate();
            // Switch off the DateFilter item's AutoHeight arrangement mode so that the DateFilter layout does not ignore its layout weight.
            ((DateFilterDashboardItem)(dashboard.Items["dateFilterDashboardItem1"])).ArrangementMode = DateFilterArrangementMode.Horizontal;
            // Hide captions.
            dashboard.Items.ForEach(item => item.ShowCaption = false);
            dashboard.Groups.ForEach(item => item.ShowCaption = false);
            // Create layout items for the DateFilter and Chart dashboard items.
            DashboardLayoutItem dateFilterLayoutItem = new DashboardLayoutItem(dashboard.Items["dateFilterDashboardItem1"], 13);
            DashboardLayoutItem chartLayoutItem = new DashboardLayoutItem(dashboard.Items["chartDashboardItem1"], 87);
            // Create a layout item for the dashboard Group item.
            DashboardLayoutGroup groupLayoutItem = new DashboardLayoutGroup()
            {
                Orientation = DashboardLayoutGroupOrientation.Vertical,
                DashboardItem = dashboard.Groups["dashboardItemGroup1"],
                Weight = 70
            };
            // Connect layout items in the layout tree.
            groupLayoutItem.ChildNodes.AddRange(dateFilterLayoutItem, chartLayoutItem);
            // Create a Grid layout item.
            DashboardLayoutItem gridLayoutItem = new DashboardLayoutItem(dashboard.Items["gridDashboardItem1"], 30);
            // Create a group layout item to organize the Grid layout item and a Dashboard Group layout item.
            DashboardLayoutGroup layoutGroup = new DashboardLayoutGroup(DashboardLayoutGroupOrientation.Horizontal, 85);
            // Connect layout items in the layout tree.
            layoutGroup.ChildNodes.AddRange(gridLayoutItem, groupLayoutItem);
            // Create a RangeFilter layout item.
            DashboardLayoutItem rangeFilterLayoutItem = new DashboardLayoutItem(dashboard.Items["rangeFilterDashboardItem1"], 15);            
            // Create a root layout group. Its DashboardItem property is null.
            DashboardLayoutGroup rootGroup = new DashboardLayoutGroup()
            {
                Orientation = DashboardLayoutGroupOrientation.Vertical,
                Weight = 100,
                DashboardItem = null
            };
            // Connect layout items in the layout tree. 
            rootGroup.ChildNodes.AddRange(layoutGroup, rangeFilterLayoutItem);
            // The layout treee is built. Set the dashboard's root layout node to finalize the layout.
            dashboard.LayoutRoot = rootGroup;
            dashboard.EndUpdate();

            dashboardViewer1.Dashboard = dashboard;

Imports System
Imports System.Linq
Imports DevExpress.XtraEditors
Imports DevExpress.DashboardCommon
Imports DevExpress.DashboardWin
'...
            Dim dashboard As New Dashboard()
            dashboard.LoadFromXml("Data\LayoutUnordered.xml")
            dashboard.BeginUpdate()
            ' Switch off the DateFilter item's AutoHeight arrangement mode so that the DateFilter layout does not ignore its layout weight.
            CType(dashboard.Items("dateFilterDashboardItem1"), DateFilterDashboardItem).ArrangementMode = DateFilterArrangementMode.Horizontal
            ' Hide captions.
            dashboard.Items.ForEach(Sub(item) item.ShowCaption = False)
            dashboard.Groups.ForEach(Sub(item) item.ShowCaption = False)
            ' Create layout items for the DateFilter and Chart dashboard items.
            Dim dateFilterLayoutItem As New DashboardLayoutItem(dashboard.Items("dateFilterDashboardItem1"), 13)
            Dim chartLayoutItem As New DashboardLayoutItem(dashboard.Items("chartDashboardItem1"), 87)
            ' Create a layout item for the dashboard Group item.
            Dim groupLayoutItem As New DashboardLayoutGroup() With {.Orientation = DashboardLayoutGroupOrientation.Vertical, .DashboardItem = dashboard.Groups("dashboardItemGroup1"), .Weight = 70}
            ' Connect layout items in the layout tree.
            groupLayoutItem.ChildNodes.AddRange(dateFilterLayoutItem, chartLayoutItem)
            ' Create a Grid layout item.
            Dim gridLayoutItem As New DashboardLayoutItem(dashboard.Items("gridDashboardItem1"), 30)
            ' Create a group layout item to organize the Grid layout item and a Dashboard Group layout item.
            Dim layoutGroup As New DashboardLayoutGroup(DashboardLayoutGroupOrientation.Horizontal, 85)
            ' Connect layout items in the layout tree.
            layoutGroup.ChildNodes.AddRange(gridLayoutItem, groupLayoutItem)
            ' Create a RangeFilter layout item.
            Dim rangeFilterLayoutItem As New DashboardLayoutItem(dashboard.Items("rangeFilterDashboardItem1"), 15)
            ' Create a root layout group. Its DashboardItem property is null.
            Dim rootGroup As New DashboardLayoutGroup() With {.Orientation = DashboardLayoutGroupOrientation.Vertical, .Weight = 100, .DashboardItem = Nothing}
            ' Connect layout items in the layout tree. 
            rootGroup.ChildNodes.AddRange(layoutGroup, rangeFilterLayoutItem)
            ' The layout treee is built. Set the dashboard's root layout node to finalize the layout.
            dashboard.LayoutRoot = rootGroup
            dashboard.EndUpdate()