Register Services in the Document Viewer

• Jan 21, 2019
• 2 minutes to read

You can register custom and/or predefined services to provide specific functionality to the Web Document Viewer.

In the Startup.ConfigureServices method, use the ServiceCollectionServiceExtensions and WebDocumentViewerConfigurationBuilder classes’ methods as shown below.

C#

public void ConfigureServices(IServiceCollection services) {
    // ...
    services.ConfigureReportingServices(configurator => {
        configurator.ConfigureWebDocumentViewer(viewerConfigurator => {
            viewerConfigurator.RegisterWebDocumentViewerDrillThroughProcessor<CustomDrillThroughProcessor>();
        });
    });

    services.AddSingleton<WebDocumentViewerOperationLogger, MyOperationLogger>();
}

See Introduction to Dependency Injection in ASP.NET Core for more information.

Custom Services

The following table lists the services you can implement and register in the Document Viewer:

Service	Description	Registration Methods
IWebDocumentViewerAuthorizationService	Enables you to implement a custom authorization mechanism.	ServiceCollectionServiceExtensions class’s methods
IExportingAuthorizationService	Allows you to provide a custom authorization mechanism for exported documents.	ServiceCollectionServiceExtensions class’s methods
WebDocumentViewerOperationLogger	Enables you to log events when the Web Document Viewer processes reports and generated documents.	ServiceCollectionServiceExtensions class’s methods
IWebDocumentViewerDrillThroughProcessor	Provides drill-through functionality to web reports.	WebDocumentViewerConfigurationBuilder.RegisterWebDocumentViewerDrillThroughProcessor
IWebDocumentViewerReportResolver	Resolves reports to display in the Web Document Viewer.	ServiceCollectionServiceExtensions class’s methods
DocumentOperationService	Enables you to perform custom operations with a Document Viewer’s currently opened document.	ServiceCollectionServiceExtensions class’s methods
IConnectionProviderFactory	Allows you to restore a data connection on a report’s deserialization.	WebDocumentViewerConfigurationBuilder.RegisterConnectionProviderFactory
IWebDocumentViewerExceptionHandler	Enables you to handle server-side errors in the Web Document Viewer.	ServiceCollectionServiceExtensions class’s methods
IWebDocumentViewerExportResultUriGenerator	Allows you to override the default URI that a browser uses to get an export result.	ServiceCollectionServiceExtensions class’s methods
StorageCleanerSettings	Enables you to provide time settings to clean a storage to store documents and reports.	ServiceCollectionServiceExtensions class’s methods
CacheCleanerSettings	Enables you to provide time settings to clean a cache to store documents and reports.	ServiceCollectionServiceExtensions class’s methods

Predefined Services

The table below lists the WebDocumentViewerConfigurationBuilder‘s methods to register the predefined services that override the default Document Viewer behavior:

Method	Description
UseFileReportStorage	Specifies a path to the report’s file storage.
UseFileDocumentStorage	Specifies a path to the report document’s file storage.
UseFileExportedDocumentStorage	Specifies a path to the exported document’s file storage.
UseEmptyStoragesCleaner	Replaces a service that is used to clean the report and document storage with an empty service to avoide automatic cleaning of this storage.
EnablePassingExportOptionsPasswordsToClient	Enables passing PDF/Excel passwords specified in the Report Designer to the Web Document Viewer.

Logger Service

Use the LoggerService class to handle exceptions that occur on the server side and log other document-related operations and information messages. Use the LoggerService.Initialize method at the application startup to register a custom logger instance.