DashboardSourceModel.DashboardLoading Property

Allows you to load a dashboard at runtime.

Namespace: DevExpress.DashboardWeb.Mvc

Assembly: DevExpress.Dashboard.v18.2.Web.Mvc5.dll

Declaration

C#

public DashboardLoadingEventHandler DashboardLoading { get; set; }

VB.NET

Public Property DashboardLoading As DashboardLoadingEventHandler

Property Value

Type	Description
DashboardLoadingEventHandler	A DashboardLoadingEventHandler delegate method allowing you to implement custom processing.

Remarks

Implement a DashboardLoadingEventHandler delegate method and assign it to the DashboardLoading property. For more implementation details, refer to the DashboardLoadingEventHandler delegate description.

Note

The method referenced by the DashboardLoadingEventHandler delegate is executed if the DashboardSourceModel.DashboardId property is assigned.

Example

The following example demonstrates how to load a dashboard to an MVC Dashboard Viewer at runtime.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-load-a-dashboard-at-runtime-to-an-mvc-dashboardviewer-t115058.

Index.cshtml (VB.NET)

@using(Html.BeginForm()) {
    @Html.Action("DashboardViewerPartial")
}

_DashboardViewerPartial.cshtml (VB.NET)

@model DevExpress.DashboardWeb.Mvc.DashboardSourceModel
@Html.DevExpress().DashboardViewer(settings => {
    settings.Name = "DashboardViewer";
    settings.CallbackRouteValues = new { Controller = "Home", Action = "DashboardViewerPartial" };
    settings.ExportRouteValues = new { Controller = "Home", Action = "DashboardViewerPartialExport" };
    settings.FullscreenMode = true;
}).BindToSource(Model).GetHtml()

HomeController.vb

Imports System.Web.Mvc
Imports DevExpress.DashboardWeb.Mvc
Imports DevExpress.DataAccess.ConnectionParameters
Imports System.IO

Namespace MVCLoadingDashboard.Controllers
    Public Class HomeController
        Inherits Controller

        Public Function Index() As ActionResult
            Return View()
        End Function

        <ValidateInput(False)> _
        Public Function DashboardViewerPartial() As ActionResult
            Return PartialView("_DashboardViewerPartial", DashboardViewerSettings.Model)
        End Function
        Public Function DashboardViewerPartialExport() As FileStreamResult
            Return DashboardViewerExtension.Export("DashboardViewer", DashboardViewerSettings.Model)
        End Function
    End Class
    Friend Class DashboardViewerSettings
        Public Shared ReadOnly Property Model() As DashboardSourceModel
            Get

                Dim model_Renamed As New DashboardSourceModel()
                model_Renamed.DashboardId = "SalesDashboard"

                model_Renamed.DashboardLoading = Sub(sender, e)
                    ' Checks the identifier of the required dashboard.
                    If e.DashboardId = "SalesDashboard" Then
                        ' Writes the dashboard XML definition from a file to a string.
                        Dim dashboardDefinition As String = 
                            File.ReadAllText(System.Web.Hosting.HostingEnvironment.MapPath("~\App_Data\SalesDashboard.xml"))

                        ' Specifies the dashboard XML definition.
                        e.DashboardXml = dashboardDefinition
                    End If
                End Sub

                model_Renamed.ConfigureDataConnection = Sub(sender, e)
                    If e.DataSourceName = "SQL Data Source 1" Then
                        ' Gets connection parameters used to establish a connection to the database.
                        Dim parameters As Access97ConnectionParameters = 
                            CType(e.ConnectionParameters, Access97ConnectionParameters)
                        Dim databasePath As String = System.Web.Hosting.HostingEnvironment.MapPath("~\App_Data\nwind.mdb")
                        ' Specifies the path to a database file.  
                        parameters.FileName = databasePath
                    End If
                End Sub

                Return model_Renamed
            End Get
        End Property
    End Class
End Namespace

_Layout.cshtml (VB.NET)

<!DOCTYPE html>

<html>
<head>
    <meta charset="UTF-8" />

    @Html.DevExpress().GetStyleSheets( 
    new StyleSheet { ExtensionSuite = ExtensionSuite.DashboardViewer }
)
@Html.DevExpress().GetScripts( 
    new Script { ExtensionSuite = ExtensionSuite.DashboardViewer }
)
</head>

<body>
        <div class="content">
            @RenderBody()
        </div>
</body>
</html>

_DashboardViewerPartial.cshtml (C#)

@model DevExpress.DashboardWeb.Mvc.DashboardSourceModel
@Html.DevExpress().DashboardViewer(settings => {
    settings.Name = "DashboardViewer";
    settings.CallbackRouteValues = new { Controller = "Home", Action = "DashboardViewerPartial" };
    settings.ExportRouteValues = new { Controller = "Home", Action = "DashboardViewerPartialExport" };
    settings.FullscreenMode = true;
}).BindToSource(Model).GetHtml()

HomeController.cs

using System.Web.Mvc;
using DevExpress.DashboardWeb.Mvc;
using DevExpress.DataAccess.ConnectionParameters;
using System.IO;

namespace MVCLoadingDashboard.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            return View();
        }

        [ValidateInput(false)]
        public ActionResult DashboardViewerPartial() {
            return PartialView("_DashboardViewerPartial", DashboardViewerSettings.Model);
        }
        public FileStreamResult DashboardViewerPartialExport() {
            return DashboardViewerExtension.Export("DashboardViewer", DashboardViewerSettings.Model);
        }
    }
    class DashboardViewerSettings {
        public static DashboardSourceModel Model {
            get {
                DashboardSourceModel model = new DashboardSourceModel();
                model.DashboardId = "SalesDashboard";

                model.DashboardLoading = (sender, e) => {
                    // Checks the identifier of the required dashboard.
                    if (e.DashboardId == "SalesDashboard") {
                        // Writes the dashboard XML definition from a file to a string.
                        string dashboardDefinition = File.ReadAllText(System.Web.Hosting.
                            HostingEnvironment.MapPath(@"~\App_Data\SalesDashboard.xml"));

                        // Specifies the dashboard XML definition.
                        e.DashboardXml = dashboardDefinition;
                    }
                };

                model.ConfigureDataConnection = (sender, e) => {
                    if (e.DataSourceName == "SQL Data Source 1") {
                        // Gets connection parameters used to establish a connection to the database.
                        Access97ConnectionParameters parameters =
                            (Access97ConnectionParameters)e.ConnectionParameters;
                        string databasePath = System.Web.Hosting.
                            HostingEnvironment.MapPath(@"~\App_Data\nwind.mdb");
                        // Specifies the path to a database file.  
                        parameters.FileName = databasePath;
                    }
                };

                return model;
            }
        }
    }
}

_Layout.cshtml (C#)

<!DOCTYPE html>

<html>
<head>
    <meta charset="UTF-8" />

    @Html.DevExpress().GetStyleSheets( 
    new StyleSheet { ExtensionSuite = ExtensionSuite.DashboardViewer }
)
@Html.DevExpress().GetScripts( 
    new Script { ExtensionSuite = ExtensionSuite.DashboardViewer }
)
</head>

<body>
        <div class="content">
            @RenderBody()
        </div>
</body>
</html>

Index.cshtml (C#)

@using(Html.BeginForm()) {
    @Html.Action("DashboardViewerPartial")
}