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Programming Introduction / Tutorial / Web Reporting Overview / Use of the Web Report Viewer
Use of the Web Report Viewer

The Web Report Viewer supports all common browser types. Thus, it can be used on clients with different operating systems. It allows interactive input through drilldown and report parameters.

Requirements

Important Hint

the objects defined in the Designer and their properties cannot always be fully transferred to any export format. The Web Report Viewer uses the List & Label XHTML/CSS Export module internally for displaying reports. For this reason, the limitations of the XHTML/CSS Export module also apply directly to the Web Report Viewer.

 

Integration - Create new Controller

Then create a new controller as usual - in the following the name MyWebReportViewerController is used as an example. Derive the controller from the WebReportViewerController class:

...
public class MyWebReportViewerController : WebReportViewerController
...

 

Integration - Override important Methods

Then implement the two abstract methods OnProvideListLabel and OnProvideRepository. Pass your List & Label instance with matching data source and temporary export path repectively the Repository to be used in the respective arguments provided.

...
public override void OnProvideListLabel(ProvideListLabelContext provideListLabelContext)
{
    // Create List & Label object
    ListLabel ll = new ListLabel();
    ll.LicensingInfo = "<ToDo: insert your license here>";

    // Define datasource
    var dataSource = GetDataProvider(provideListLabelContext.RepositoryItemId);
    ll.DataSource = dataSource;

    // The Web Report Viewer requires a directory for temporary files. Some minutes after a Web Report Viewer is closed, these files will be deleted automatically
    provideListLabelContext.ExportPath = Server.MapPath("~/App_Data/TempFiles");

    // Return configured List & Label object
    provideListLabelContext.NewInstance = ll;
}

public override void OnProvideRepository(ProvideRepositoryContext provideFileRepositoryContext)
{
    provideFileRepositoryContext.FileRepository = DefaultSettings.GetRepository();
} 
...

 

For redistribution it is important that additionally the List & Label license key (see also LicensingInfo) is specified in OnProvideListLabel() for the List & Label instance.

Note: For a detailed implementation for DefaultSettings.GetRepository() in OnProvideRepository(), see the provided ASP.NET examples.

 

Integration - .NET Switch

The further procedure differs for .NET 6/.NET 8/.NET 9 and .NET 4.8.

 

.NET 6/.NET 8/.NET 9:

If you see a startup.cs file (otherwise see below), add the following lines to the end of the Configure method:

...
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    // do some other stuff here
    // ...

    app.UseWebReportViewer();
}
...

 

If there is no startup.cs you should have a program.cs in .NET 6. In this case, add app.UseWebReportViewer(); right after any other app.Use... call and add builder.Services.AddWebReportViewer(); right after any other builder.Services... call. 

 

.NET 4.8:

In the global.asax.cs/global.asax.vb file, add the following line before the RouteConfig.RegisterRoutes() call:

...
WebReportViewerConfig.RegisterRoutes(RouteTable.Routes);
...

 

Using Web Report Viewer

The configuration is now complete. Now the Web Report Viewer can be inserted and used in the desired view as follows:

...
@using combit.Reporting.Web
@{
    Layout = null;
    string repositoryId = Request.QueryString["reportRepositoryID"];
    if (!String.IsNullOrEmpty(repositoryId))
    {
        repositoryId = repositoryId.Replace("repository://{", "").Replace("}", "");
    }

    var optionWRV = new WebReportViewerMVCOptions(repositoryId)
    {
        Title = "Web Report Viewer"
    };
}
<!DOCTYPE html>
@Html.WebReportViewer(optionWRV)
...

 

Further

The List & Label installation contains corresponding ASP.NET examples that show the use of the Web Report Viewer in detail.