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

• Mar 19, 2019
• 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

The complete sample project How to obtain dashboard item’s underlying data when the mouse hovers over it is available in the DevExpress Examples repository.

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