How to: Get the Underlying Data When the Mouse Hovers Over the Dashboard Item

• Jun 02, 2020
• 2 minutes to read

This example handles the DashboardItemMouseEnter, DashboardItemMouseMove and DashboardItemMouseLeave events to display a popup that contains a GridControl to display item data when the mouse hovers over it. The data are obtained using the e.GetUnderlyingData method.

Note

Example on GitHub: How to obtain dashboard item’s underlying data when the mouse hovers over it

C#

using DevExpress.DashboardCommon;
using DevExpress.DashboardWpf;
using System.Windows;

namespace Dashboard_UnderlyingDataWPF
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void DashboardControl_DashboardItemMouseMove(object sender, DashboardItemMouseActionWpfEventArgs e)
        {
            if (e.DashboardItemName != null)
            {
                DashboardUnderlyingDataSet underlyingData = e.GetUnderlyingData();
                myGrid.ItemsSource = underlyingData;
                tooltip.Placement = System.Windows.Controls.Primitives.PlacementMode.MousePoint;
            }
        }

        private void DashboardControl_DashboardItemMouseEnter(object sender, DashboardItemMouseWpfEventArgs e)
        {
            tooltip.IsOpen = true;
        }

        private void DashboardControl_DashboardItemMouseLeave(object sender, DashboardItemMouseWpfEventArgs e)
        {
            tooltip.IsOpen = false;
        }
    }
}

VB.NET

Imports DevExpress.DashboardCommon
Imports DevExpress.DashboardWpf
Imports System.Windows

Namespace Dashboard_UnderlyingDataWPF
    ''' <summary>
    ''' Interaction logic for MainWindow.xaml
    ''' </summary>
    Partial Public Class MainWindow
        Inherits Window

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub DashboardControl_DashboardItemMouseMove(ByVal sender As Object, ByVal e As DashboardItemMouseActionWpfEventArgs)
            If e.DashboardItemName IsNot Nothing Then
                Dim underlyingData As DashboardUnderlyingDataSet = e.GetUnderlyingData()
                myGrid.ItemsSource = underlyingData
                tooltip.Placement = System.Windows.Controls.Primitives.PlacementMode.MousePoint
            End If
        End Sub

        Private Sub DashboardControl_DashboardItemMouseEnter(ByVal sender As Object, ByVal e As DashboardItemMouseWpfEventArgs)
            tooltip.IsOpen = True
        End Sub

        Private Sub DashboardControl_DashboardItemMouseLeave(ByVal sender As Object, ByVal e As DashboardItemMouseWpfEventArgs)
            tooltip.IsOpen = False
        End Sub
    End Class
End Namespace