DashboardViewer.DashboardItemSelectionChanged Event

Occurs after the selection within the dashboard item is changed.

Namespace: DevExpress.DashboardWin

Assembly: DevExpress.Dashboard.v24.2.Win.dll

Declaration

C#

public event DashboardItemSelectionChangedEventHandler DashboardItemSelectionChanged

VB.NET

Public Event DashboardItemSelectionChanged As DashboardItemSelectionChangedEventHandler

Event Data

The DashboardItemSelectionChanged event's data class is DashboardItemSelectionChangedEventArgs. The following properties provide information specific to this event:

Property	Description
CurrentSelection	Gets currently selected elements.
DashboardItemName	Gets the component name of the dashboard item for which the event was raised.

Remarks

The DashboardItemSelectionChanged event is raised after the selection within the dashboard item is changed. The selection can be changed in the following ways:

• the state of master filter item is changed by an end-user or using DashboardViewer‘s API (the DashboardViewer.SetMasterFilter or DashboardViewer.ClearMasterFilter methods);
• changing the selection within the dashboard item for which a custom visual interactivity is provided (using the DashboardViewer.DashboardItemVisualInteractivity event).

The DashboardItemSelectionChangedEventArgs.DashboardItemName property returns the name of the dashboard item for which the event was raised. Use the DashboardItemSelectionChangedEventArgs.CurrentSelection property to obtain the currently selected elements.

Handle the DashboardItemSelectionChanged event to detect the currently selected dashboard item.

Example

This example shows how to add a custom interactivity to a dashboard loaded in the WinForms Dashboard Viewer:

• A user can select records in the Grid dashboard item to filter data in the external Pivot Grid control.
• When a user clicks the chart series, the Data Grid control displays the corresponding underlying data.

To accomplish this, handle the following events:

• DashboardViewer.DashboardItemVisualInteractivity event allows you to implement a custom Master Filtering.

• DashboardViewer.DashboardItemSelectionChanged event allows you to filter data in the external PivotGridControl with the records selected in the Grid dashboard item.

• The DashboardViewer.DashboardItemSelectionChanged event allows you to obtain underlying data when the user clicks the chart series.

This example operates with the MultiDimensionalData API. For more information on the MultiDimensionalData concept, refer to the Obtaining Underlying and Displayed Data document.

View Example: How to Implement Custom Interactivity in WinForms DashboardViewer

Form1.cs

using DevExpress.DashboardCommon;
using DevExpress.DashboardCommon.ViewerData;
using DevExpress.DashboardWin;
using DevExpress.XtraEditors;
using DevExpress.XtraPivotGrid;
using System.Windows.Forms;

namespace Dashboard_CustomVisualInteractivity
{
    public partial class Form1 : XtraForm {
        public Form1() {
            InitializeComponent();
            dashboardViewer1.DataLoading += dashboardViewer1_DataLoading;
            dashboardViewer1.DashboardItemClick += dashboardViewer1_DashboardItemClick;
            dashboardViewer1.DashboardItemVisualInteractivity += dashboardViewer1_DashboardItemVisualInteractivity;
            dashboardViewer1.DashboardItemSelectionChanged += dashboardViewer1_DashboardItemSelectionChanged;

            salesPersonTableAdapter.Fill(nwindDataSet.SalesPerson);

            dashboardViewer1.LoadDashboard("Data\\Dashboard.xml");
        }

        private void dashboardViewer1_DashboardItemVisualInteractivity(object sender, 
            DashboardItemVisualInteractivityEventArgs e) {
            if (e.DashboardItemName == "gridDashboardItem1") {
                e.SelectionMode = DashboardSelectionMode.Multiple;
                e.SetDefaultSelection(e.Data.GetAxisPoints(DashboardDataAxisNames.DefaultAxis)[0]);
            }
            if (e.DashboardItemName == "chartDashboardItem1") {
                e.TargetAxes.Add(DashboardDataAxisNames.ChartArgumentAxis);
                e.TargetAxes.Add(DashboardDataAxisNames.ChartSeriesAxis);
                e.EnableHighlighting = true;
            }
        }

        private void dashboardViewer1_DashboardItemSelectionChanged(object sender, 
            DashboardItemSelectionChangedEventArgs e) {
            pivotGridControl1.BeginUpdate();
            fieldCategoryName1.FilterValues.FilterType = PivotFilterType.Included;
            fieldCategoryName1.FilterValues.Clear();
            foreach (AxisPointTuple selectedElement in e.CurrentSelection) {
                string category = selectedElement.GetAxisPoint().DimensionValue.Value.ToString();
                fieldCategoryName1.FilterValues.Add(category);
            }
            pivotGridControl1.EndUpdate();
        }

        private void dashboardViewer1_DashboardItemClick(object sender, 
            DashboardItemMouseActionEventArgs e) {
            if (e.DashboardItemName == "chartDashboardItem1" && e.GetAxisPoint() != null) {
                XtraForm form = new XtraForm();
                form.Text = e.GetAxisPoint(DashboardDataAxisNames.ChartArgumentAxis).
                    DimensionValue.Value.ToString() + " - " +
                    e.GetAxisPoint(DashboardDataAxisNames.ChartSeriesAxis).
                    DimensionValue.Value.ToString();
                DataGrid grid = new DataGrid();
                grid.Parent = form; grid.Dock = DockStyle.Fill;
                grid.DataSource = e.GetUnderlyingData();
                form.ShowDialog();
                form.Dispose();
            }
        }

        private void dashboardViewer1_DataLoading(object sender, DataLoadingEventArgs e) {
            if (e.DataSourceComponentName == "dataSource1") {
                e.Data = nwindDataSet.SalesPerson;
            }
        }
    }
}

Form1.vb

Imports DevExpress.DashboardCommon
Imports DevExpress.DashboardCommon.ViewerData
Imports DevExpress.DashboardWin
Imports DevExpress.XtraEditors
Imports DevExpress.XtraPivotGrid
Imports System.Windows.Forms

Namespace Dashboard_CustomVisualInteractivity
    Partial Public Class Form1
        Inherits XtraForm

        Public Sub New()
            InitializeComponent()
            AddHandler dashboardViewer1.DataLoading, AddressOf dashboardViewer1_DataLoading
            AddHandler dashboardViewer1.DashboardItemClick, AddressOf dashboardViewer1_DashboardItemClick
            AddHandler dashboardViewer1.DashboardItemVisualInteractivity, AddressOf dashboardViewer1_DashboardItemVisualInteractivity
            AddHandler dashboardViewer1.DashboardItemSelectionChanged, AddressOf dashboardViewer1_DashboardItemSelectionChanged

            salesPersonTableAdapter.Fill(nwindDataSet.SalesPerson)

            dashboardViewer1.LoadDashboard("Data\Dashboard.xml")
        End Sub

        Private Sub dashboardViewer1_DashboardItemVisualInteractivity(ByVal sender As Object, ByVal e As DashboardItemVisualInteractivityEventArgs)
            If e.DashboardItemName = "gridDashboardItem1" Then
                e.SelectionMode = DashboardSelectionMode.Multiple
                e.SetDefaultSelection(e.Data.GetAxisPoints(DashboardDataAxisNames.DefaultAxis)(0))
            End If
            If e.DashboardItemName = "chartDashboardItem1" Then
                e.TargetAxes.Add(DashboardDataAxisNames.ChartArgumentAxis)
                e.TargetAxes.Add(DashboardDataAxisNames.ChartSeriesAxis)
                e.EnableHighlighting = True
            End If
        End Sub

        Private Sub dashboardViewer1_DashboardItemSelectionChanged(ByVal sender As Object, ByVal e As DashboardItemSelectionChangedEventArgs)
            pivotGridControl1.BeginUpdate()
            fieldCategoryName1.FilterValues.FilterType = PivotFilterType.Included
            fieldCategoryName1.FilterValues.Clear()
            For Each selectedElement As AxisPointTuple In e.CurrentSelection
                Dim category As String = selectedElement.GetAxisPoint().DimensionValue.Value.ToString()
                fieldCategoryName1.FilterValues.Add(category)
            Next selectedElement
            pivotGridControl1.EndUpdate()
        End Sub

        Private Sub dashboardViewer1_DashboardItemClick(ByVal sender As Object, ByVal e As DashboardItemMouseActionEventArgs)
            If e.DashboardItemName = "chartDashboardItem1" AndAlso e.GetAxisPoint() IsNot Nothing Then
                Dim form As New XtraForm()
                form.Text = e.GetAxisPoint(DashboardDataAxisNames.ChartArgumentAxis).DimensionValue.Value.ToString() & " - " & e.GetAxisPoint(DashboardDataAxisNames.ChartSeriesAxis).DimensionValue.Value.ToString()
                Dim grid As New DataGrid()
                grid.Parent = form
                grid.Dock = DockStyle.Fill
                grid.DataSource = e.GetUnderlyingData()
                form.ShowDialog()
                form.Dispose()
            End If
        End Sub

        Private Sub dashboardViewer1_DataLoading(ByVal sender As Object, ByVal e As DataLoadingEventArgs)
            If e.DataSourceComponentName = "dataSource1" Then
                e.Data = nwindDataSet.SalesPerson
            End If
        End Sub
    End Class
End Namespace

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the DashboardItemSelectionChanged event.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

winforms-dashboard-add-custom-interactivity-to-dashboard/CS/Dashboard_CustomVisualInteractivity/Form1.cs#L16

dashboardViewer1.DashboardItemVisualInteractivity += dashboardViewer1_DashboardItemVisualInteractivity;
dashboardViewer1.DashboardItemSelectionChanged += dashboardViewer1_DashboardItemSelectionChanged;

VB.NET

winforms-dashboard-add-custom-interactivity-to-dashboard/VB/Dashboard_CustomVisualInteractivity/Form1.vb#L17

AddHandler dashboardViewer1.DashboardItemVisualInteractivity, AddressOf dashboardViewer1_DashboardItemVisualInteractivity
AddHandler dashboardViewer1.DashboardItemSelectionChanged, AddressOf dashboardViewer1_DashboardItemSelectionChanged

Implements

DashboardItemSelectionChanged