WebDocumentViewerOperationLogger.ReportOpening(String, String, XtraReport) Method

Called when the Document Viewer loads a report. Allows you to modify a report before it is loaded.

Namespace: DevExpress.XtraReports.Web.WebDocumentViewer

Assembly: DevExpress.XtraReports.v24.1.Web.dll

NuGet Package: DevExpress.Web.Reporting.Common

Declaration

C#

public virtual void ReportOpening(
    string reportId,
    string documentId,
    XtraReport report
)

VB.NET

Public Overridable Sub ReportOpening(
    reportId As String,
    documentId As String,
    report As XtraReport
)

Parameters

Name	Type	Description
reportId	String	A String value, identifying the report.
documentId	String	A String value, identifying the report document.
report	XtraReport	An XtraReport object.

Remarks

The following code is a custom interface implementation that allows authorized users to view the report in the Document Viewer. A custom WebDocumentViewerOperationLogger service populates dictionaries with the user id, report id, document id and asynchronous operation id. The IWebDocumentViewerAuthorizationService controls access to reports and documents, the IExportingAuthorizationService controls access to the asynchronously exported document.

OperationLogger.cs

using DevExpress.XtraReports.UI;
using DevExpress.XtraReports.Web.WebDocumentViewer;
using System.Collections.Concurrent;
using System.Web;
using System;
using DevExpress.XtraPrinting;
using DevExpress.XtraReports.Web.ClientControls;

namespace AuthorizationService.Services {
    public class OperationLogger: WebDocumentViewerOperationLogger, 
        IWebDocumentViewerAuthorizationService, 
        IExportingAuthorizationService
    {
        public override void ReportOpening(string reportId, string documentId, XtraReport report) 
        {
            if (HttpContext.Current.Session == null) {
                return;
            }
            SaveUsedEntityId(Constants.ReportDictionaryName, reportId);
            SaveUsedEntityId(Constants.DocumentDictionaryName, documentId);
        }

        public override void BuildStarted(string reportId, string documentId, 
            ReportBuildProperties buildProperties) 
        {
            SaveUsedEntityId(Constants.ReportDictionaryName, reportId);
            SaveUsedEntityId(Constants.DocumentDictionaryName, documentId);
        }

        public override ExportedDocument ExportDocumentStarting(string documentId, 
            string asyncExportOperationId, string format, ExportOptions options, 
            PrintingSystemBase printingSystem, Func<ExportedDocument> doExportSynchronously) 
        {
            SaveUsedEntityId(Constants.ExportedDocumentDictionaryName, asyncExportOperationId);
            return base.ExportDocumentStarting(documentId, asyncExportOperationId, format, options, 
                printingSystem, doExportSynchronously);
        }

        public override void ReleaseDocument(string documentId) {

        }

        bool IWebDocumentViewerAuthorizationService.CanCreateDocument() {
            return CheckUserAuthorized();
        }

        bool IWebDocumentViewerAuthorizationService.CanCreateReport() {
            return CheckUserAuthorized();
        }

        bool IWebDocumentViewerAuthorizationService.CanReadDocument(string documentId) {
            return CheckEntityAvailability(Constants.DocumentDictionaryName, documentId);
        }

        bool IWebDocumentViewerAuthorizationService.CanReadReport(string reportId) {
            return CheckEntityAvailability(Constants.ReportDictionaryName, reportId);
        }

        bool IWebDocumentViewerAuthorizationService.CanReleaseDocument(string documentId) {
            return CheckEntityAvailability(Constants.DocumentDictionaryName, documentId);
        }

        bool IWebDocumentViewerAuthorizationService.CanReleaseReport(string reportId) {
            return CheckEntityAvailability(Constants.ReportDictionaryName, reportId);
        }

        public bool CanReadExportedDocument(string exportDocumentId) {
            return CheckEntityAvailability(Constants.ExportedDocumentDictionaryName, exportDocumentId);
        }

        bool CheckUserAuthorized() {
            var user = HttpContext.Current.User;
            if (user == null || user.Identity == null || !user.Identity.IsAuthenticated)
            {
                return false;
            }
            return true;
        }

        void SaveUsedEntityId(string dictionaryName, string id) {
            if (string.IsNullOrEmpty(id))
                return;

            ConcurrentDictionary<string, bool> dictionary = null;
            lock (HttpContext.Current.Session.SyncRoot) {
                if (HttpContext.Current.Session[dictionaryName] == null)
                     HttpContext.Current.Session[dictionaryName] = dictionary 
                        = new ConcurrentDictionary<string, bool>();
            }
            if (dictionary == null)
                dictionary = ((ConcurrentDictionary<string, bool>)HttpContext.Current.
                    Session[dictionaryName]);
            dictionary.AddOrUpdate(id, false, (_1, _2) => false);
        }

        bool CheckEntityAvailability(string dictionaryName, string id) {
            if (string.IsNullOrEmpty(id) || !CheckUserAuthorized())
                return false;

            lock (HttpContext.Current.Session.SyncRoot) {
                if (HttpContext.Current.Session[dictionaryName] == null)
                    return false;
            }
            return 
            ((ConcurrentDictionary<string, bool>)HttpContext.Current.
                Session[dictionaryName]).ContainsKey(id);
        }

        void DisposeEntityRequested(string dictionaryName, string id) {
            if (string.IsNullOrEmpty(id))
                return;
            lock (HttpContext.Current.Session.SyncRoot) {
                if (HttpContext.Current.Session[dictionaryName] == null)
                    return;
            }
            ((ConcurrentDictionary<string, bool>)HttpContext.Current.
                Session[dictionaryName]).AddOrUpdate(id, true, (_1, _2) => true);
        }
    }
}

OperationLogger.vb

Imports DevExpress.XtraReports.Web.WebDocumentViewer
Imports System.Collections.Concurrent
Imports System.Web
Imports System
Imports DevExpress.XtraReports.UI
Imports DevExpress.XtraPrinting
Imports DevExpress.XtraReports.Web.ClientControls

Namespace AuthorizationService.Services
    Public Class OperationLogger
        Inherits WebDocumentViewerOperationLogger
        Implements IWebDocumentViewerAuthorizationService, IExportingAuthorizationService

#Region "WebDocumentViewerOperationLogger"
        Public Overrides Sub ReportOpening(ByVal reportId As String, ByVal documentId As String,
                                           ByVal report As XtraReport)
            If HttpContext.Current.Session Is Nothing Then
                Return
            End If
            SaveUsedEntityId(Constants.ReportDictionaryName, reportId)
            SaveUsedEntityId(Constants.DocumentDictionaryName, documentId)
        End Sub

        Public Overrides Sub BuildStarted(ByVal reportId As String, ByVal documentId As String,
                                          ByVal buildProperties As ReportBuildProperties)
            SaveUsedEntityId(Constants.ReportDictionaryName, reportId)
            SaveUsedEntityId(Constants.DocumentDictionaryName, documentId)
        End Sub

        Public Overrides Function ExportDocumentStarting(ByVal documentId As String,
                            ByVal asyncExportOperationId As String,
                            ByVal format As String,
                            ByVal options As ExportOptions,
                            ByVal printingSystem As PrintingSystemBase,
                            ByVal doExportSynchronously As Func(Of ExportedDocument)) As ExportedDocument
            SaveUsedEntityId(Constants.ExportedDocumentDictionaryName, asyncExportOperationId)
            Return MyBase.ExportDocumentStarting(documentId, asyncExportOperationId, format,
                                                 options, printingSystem, doExportSynchronously)
        End Function

        Public Overrides Sub ReleaseDocument(ByVal documentId As String)

        End Sub
#End Region

#Region "IWebDocumentViewerAuthorizationService"
        Private Function IWebDocumentViewerAuthorizationService_CanCreateDocument() As Boolean _
            Implements IWebDocumentViewerAuthorizationService.CanCreateDocument
            Return CheckUserAuthorized()
        End Function

        Private Function IWebDocumentViewerAuthorizationService_CanCreateReport() As Boolean _
            Implements IWebDocumentViewerAuthorizationService.CanCreateReport
            Return CheckUserAuthorized()
        End Function

        Private Function IWebDocumentViewerAuthorizationService_CanReadDocument(ByVal documentId As String) _
            As Boolean _
            Implements IWebDocumentViewerAuthorizationService.CanReadDocument
            Return CheckEntityAvailability(Constants.DocumentDictionaryName, documentId)
        End Function

        Private Function IWebDocumentViewerAuthorizationService_CanReadReport(ByVal reportId As String) _
            As Boolean _
            Implements IWebDocumentViewerAuthorizationService.CanReadReport
            Return CheckEntityAvailability(Constants.ReportDictionaryName, reportId)
        End Function

        Private Function IWebDocumentViewerAuthorizationService_CanReleaseDocument(ByVal documentId As String) _
            As Boolean _
            Implements IWebDocumentViewerAuthorizationService.CanReleaseDocument
            Return CheckEntityAvailability(Constants.DocumentDictionaryName, documentId)
        End Function

        Private Function IWebDocumentViewerAuthorizationService_CanReleaseReport(ByVal reportId As String) _
            As Boolean _
            Implements IWebDocumentViewerAuthorizationService.CanReleaseReport
            Return CheckEntityAvailability(Constants.ReportDictionaryName, reportId)
        End Function

        Public Function CanReadExportedDocument(ByVal exportDocumentId As String) As Boolean _
            Implements IExportingAuthorizationService.CanReadExportedDocument
            Return CheckEntityAvailability(Constants.ExportedDocumentDictionaryName, exportDocumentId)
        End Function
#End Region ' IWebDocumentViewerAuthorizationService, IExportingAuthorizationService

        Private Function CheckUserAuthorized() As Boolean
            Dim user = HttpContext.Current.User
            If user Is Nothing OrElse user.Identity Is Nothing OrElse Not user.Identity.IsAuthenticated Then
                Return False
            End If
            Return True
        End Function

        Private Sub SaveUsedEntityId(ByVal dictionaryName As String, ByVal id As String)
            If String.IsNullOrEmpty(id) Then
                Return
            End If

            Dim dictionary As ConcurrentDictionary(Of String, Boolean) = Nothing
            SyncLock HttpContext.Current.Session.SyncRoot
                If HttpContext.Current.Session(dictionaryName) Is Nothing Then
                     dictionary = New ConcurrentDictionary(Of String, Boolean)()
                     HttpContext.Current.Session(dictionaryName) = dictionary
                End If
            End SyncLock
            If dictionary Is Nothing Then
                dictionary = (DirectCast(HttpContext.Current.Session(dictionaryName),
                    ConcurrentDictionary(Of String, Boolean)))
            End If
            dictionary.AddOrUpdate(id, False, Function(_1, _2) False)
        End Sub

        Private Function CheckEntityAvailability(ByVal dictionaryName As String,
                                                 ByVal id As String) As Boolean
            If String.IsNullOrEmpty(id) OrElse Not CheckUserAuthorized() Then
                Return False
            End If

            SyncLock HttpContext.Current.Session.SyncRoot
                If HttpContext.Current.Session(dictionaryName) Is Nothing Then
                    Return False
                End If
            End SyncLock
            Return DirectCast(HttpContext.Current.Session(dictionaryName),
                ConcurrentDictionary(Of String, Boolean)).ContainsKey(id)
        End Function

        Private Sub DisposeEntityRequested(ByVal dictionaryName As String, ByVal id As String)
            If String.IsNullOrEmpty(id) Then
                Return
            End If
            SyncLock HttpContext.Current.Session.SyncRoot
                If HttpContext.Current.Session(dictionaryName) Is Nothing Then
                    Return
                End If
            End SyncLock
            DirectCast(HttpContext.Current.Session(dictionaryName),
                ConcurrentDictionary(Of String, Boolean)).AddOrUpdate(id, True, Function(_1, _2) True)
        End Sub
    End Class
End Namespace