IDashboardStateService Interface

When implemented by a class, provides a service used to manage a dashboard state.

Namespace: DevExpress.DashboardWeb

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

Declaration

C#

public interface IDashboardStateService

VB.NET

Public Interface IDashboardStateService

Remarks

Use the DashboardConfigurator.SetDashboardStateService method to specify the service used to manage a dashboard state.

To learn more about a dashboard state, see Manage Dashboard State.

Example

The sample illustrates how to specify a dashboard state (such as master filter or parameter values) in code and how to apply this state when loading a dashboard for the first time. In this example, the DashboardState object holds the required dashboard state. The DashboardConfigurator.SetDashboardStateService method is used to apply the specified dashboard state when loading a dashboard.

Create a custom dashboard state service and define the dashboard state:

CustomDashboardStateService.cs

using DevExpress.DashboardCommon;
using DevExpress.DashboardWeb;
using System;
using System.Collections.Generic;

namespace MvcDashboard_DefaultDashboardState {
    public class CustomDashboardStateService : IDashboardStateService {
        public DashboardState GetState(string dashboardId, System.Xml.Linq.XDocument dashboard) {
            DashboardState dashboardState = new DashboardState();

            DashboardParameterState parameterState =
                new DashboardParameterState("countryParameter", "USA", typeof(string));

            DashboardItemState gridFilterState = new DashboardItemState("gridDashboardItem1");
            gridFilterState.MasterFilterValues.AddRange(new List<object[]>() {
                new string[1] { "Andrew Fuller" },
                new string[1] { "Laura Callahan" }
            }
            );

            DashboardItemState treemapDrilldownState = new DashboardItemState("treemapDashboardItem1");
            treemapDrilldownState.DrillDownValues.Add("Beverages");

            DashboardItemState rangeFilterState = new DashboardItemState("rangeFilterDashboardItem1");
            rangeFilterState.RangeFilterState.Selection =
                new RangeFilterSelection(new DateTime(2015, 1, 1), new DateTime(2016, 1, 1));

            dashboardState.Parameters.Add(parameterState);
            dashboardState.Items.AddRange(new List<DashboardItemState>() {
                gridFilterState,
                treemapDrilldownState,
                rangeFilterState }
            );
            return dashboardState;
        }
    }
}

CustomDashboardStateService.vb

Imports DevExpress.DashboardCommon
Imports DevExpress.DashboardWeb

Namespace MvcDashboard_DefaultDashboardState
    Public Class CustomDashboardStateService
        Implements IDashboardStateService

        Public Function GetState(ByVal dashboardId As String, ByVal dashboard As XDocument) As DashboardState Implements IDashboardStateService.GetState
            Dim dashboardState As New DashboardState()

            Dim parameterState As New DashboardParameterState("countryParameter", "USA", GetType(String))

            Dim gridFilterState As New DashboardItemState("gridDashboardItem1")
            gridFilterState.MasterFilterValues.AddRange(New List(Of Object())() From {
                New String(0) {"Andrew Fuller"},
                New String(0) {"Laura Callahan"}
            })

            Dim treemapDrilldownState As New DashboardItemState("treemapDashboardItem1")
            treemapDrilldownState.DrillDownValues.Add("Beverages")

            Dim rangeFilterState As New DashboardItemState("rangeFilterDashboardItem1")
            rangeFilterState.RangeFilterState.Selection = New RangeFilterSelection(New Date(2015, 1, 1), New Date(2016, 1, 1))

            dashboardState.Parameters.Add(parameterState)
            dashboardState.Items.AddRange(New List(Of DashboardItemState)() From {gridFilterState, treemapDrilldownState, rangeFilterState})
            Return dashboardState
        End Function
    End Class
End Namespace

Call the DashboardConfigurator.SetDashboardStateService(IDashboardStateService) method to apply the created dashboard state service:

DashboardConfig.cs

using DevExpress.DashboardWeb;
using DevExpress.DashboardWeb.Mvc;
using System.Web.Routing;

namespace MvcDashboard_DefaultDashboardState {
    public static class DashboardConfig {
        public static void RegisterService(RouteCollection routes) {
            routes.MapDashboardRoute("dashboardControl","DefaultDashboard");
            DashboardFileStorage dashboardFileStorage = new DashboardFileStorage("~/App_Data/Dashboards");
            DashboardConfigurator.Default.SetDashboardStorage(dashboardFileStorage);

            DashboardConfigurator.Default.SetDashboardStateService(new CustomDashboardStateService());
        }
    }
}

DashboardConfig.vb

Imports System.Web.Routing
Imports DevExpress.DashboardWeb
Imports DevExpress.DashboardWeb.Mvc

Namespace MvcDashboard_DefaultDashboardState
    Public NotInheritable Class DashboardConfig

        Private Sub New()
        End Sub

        Public Shared Sub RegisterService(ByVal routes As RouteCollection)
            routes.MapDashboardRoute("dashboardControl","DefaultDashboard")
            Dim dashboardFileStorage As New DashboardFileStorage("~/App_Data/Dashboards")
            DashboardConfigurator.Default.SetDashboardStorage(dashboardFileStorage)

            DashboardConfigurator.Default.SetDashboardStateService(New CustomDashboardStateService())
        End Sub
    End Class
End Namespace