DashboardViewer.GetItemDataAsync(String) Method

Obtains the displayed data for the specified dashboard item asynchronously.

Namespace: DevExpress.DashboardWin

Assembly: DevExpress.Dashboard.v20.1.Win.dll

NuGet Packages: DevExpress.Win.Dashboard, DevExpress.WindowsDesktop.Win.Dashboard

Declaration

C#

public Task<MultiDimensionalData> GetItemDataAsync(
    string dashboardItemName
)

VB.NET

Public Function GetItemDataAsync(
    dashboardItemName As String
) As Task(Of MultiDimensionalData)

Parameters

Name	Type	Description
dashboardItemName	String	A String that specifies the component name of the dashboard item.

Returns

Type	Description
Task<MultiDimensionalData>	The task object that is the asynchronous operation to get the data visualized in the dashboard item.

Example

This example demonstrates how to get the data displayed in the dashboard item asynchronously when the dashboard is loaded.

Note

Example on GitHub: How to Get Dashboard Item Data Asynchronously

C#

using DevExpress.DashboardCommon;
using DevExpress.XtraEditors;
using System;
using System.Threading.Tasks;

namespace DataCounterExample
{
    public partial class ViewerForm1 : XtraForm {
        public ViewerForm1() {
            InitializeComponent();
            dashboardViewer1.Initialized += OnDashboardViewerInitialized;
            dashboardViewer1.MasterFilterSet += OnDashboardViewerMasterFilterSet;
            dashboardViewer1.MasterFilterCleared += OnDashboardViewerMasterFilterCleared;
        }

        async void OnDashboardViewerInitialized(object sender, EventArgs e) {
            simpleLabelItem1.Text = await GetLabelText("choroplethMapDashboardItem1", "Map");
            simpleLabelItem2.Text = await GetLabelText("gridDashboardItem1", "Grid");
        }

        async void OnDashboardViewerMasterFilterSet(object sender, MasterFilterSetEventArgs e) {
            simpleLabelItem2.Text = await GetLabelText("gridDashboardItem1", "Grid");
        }

        async void OnDashboardViewerMasterFilterCleared(object sender, MasterFilterClearedEventArgs e) {
            simpleLabelItem2.Text = await GetLabelText("gridDashboardItem1", "Grid");
        }

        async Task<string> GetLabelText(string itemName, string itemCaption) {
            var data = await dashboardViewer1.GetItemDataAsync(itemName);
            int count = data.GetAxisPoints(data.GetAxisNames()[0]).Count;
            return string.Format("{0}: {1}", itemCaption, count);
        }
    }
}

VB.NET

Imports DevExpress.DashboardCommon
Imports DevExpress.XtraEditors
Imports System
Imports System.Threading.Tasks

Namespace DataCounterExample
    Partial Public Class ViewerForm1
        Inherits XtraForm

        Public Sub New()
            InitializeComponent()
            AddHandler dashboardViewer1.Initialized, AddressOf OnDashboardViewerInitialized
            AddHandler dashboardViewer1.MasterFilterSet, AddressOf OnDashboardViewerMasterFilterSet
            AddHandler dashboardViewer1.MasterFilterCleared, AddressOf OnDashboardViewerMasterFilterCleared
        End Sub

        Private Async Sub OnDashboardViewerInitialized(ByVal sender As Object, ByVal e As EventArgs)
            simpleLabelItem1.Text = Await GetLabelText("choroplethMapDashboardItem1", "Map")
            simpleLabelItem2.Text = Await GetLabelText("gridDashboardItem1", "Grid")
        End Sub

        Private Async Sub OnDashboardViewerMasterFilterSet(ByVal sender As Object, ByVal e As MasterFilterSetEventArgs)
            simpleLabelItem2.Text = Await GetLabelText("gridDashboardItem1", "Grid")
        End Sub

        Private Async Sub OnDashboardViewerMasterFilterCleared(ByVal sender As Object, ByVal e As MasterFilterClearedEventArgs)
            simpleLabelItem2.Text = Await GetLabelText("gridDashboardItem1", "Grid")
        End Sub

        Private Async Function GetLabelText(ByVal itemName As String, ByVal itemCaption As String) As Task(Of String)
            Dim data = Await dashboardViewer1.GetItemDataAsync(itemName)
            Dim count As Integer = data.GetAxisPoints(data.GetAxisNames()(0)).Count
            Return String.Format("{0}: {1}", itemCaption, count)
        End Function
    End Class
End Namespace

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the GetItemDataAsync(String) method.

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-async-mode-get-item-data/CS/ViewerForm1.cs#L30

async Task<string> GetLabelText(string itemName, string itemCaption) {
    var data = await dashboardViewer1.GetItemDataAsync(itemName);
    int count = data.GetAxisPoints(data.GetAxisNames()[0]).Count;

VB.NET

winforms-dashboard-async-mode-get-item-data/VB/ViewerForm1.vb#L31

Private Async Function GetLabelText(ByVal itemName As String, ByVal itemCaption As String) As Task(Of String)
    Dim data = Await dashboardViewer1.GetItemDataAsync(itemName)
    Dim count As Integer = data.GetAxisPoints(data.GetAxisNames()(0)).Count

Implements

GetItemDataAsync(String)