¹Use SetLocateDataSource method of the report service instead, as shown:

Application_Start(object sender, EventArgs e)        {
this.UseReporting(settings =>
    {
      settings.UseFileStore(new DirectoryInfo(Server.MapPath("~")));
      settings.UseCompression = true;
      settings.SetLocateDataSource(args => { return LoadData(); });
    });
}
        

Also, you can set the LocateDataSource event handler for a report directly as in the following code example.

pageReport.Document.LocateDataSource += new LocateDataSourceEventHandler(Document_LocateDataSource);
webViewer.Report = pageReport;                 

1. Following is the list of changes in public classes and namespaces location:

   Class/Namespace	ActiveReports 12	ActiveReports 13	Impact
   ResourceLocator, DefaultResourceLocator	GrapeCity.ActiveReports.Extensibility.v12	GrapeCity.ActiveReports.Core.Rdl	On creating own resource locator
   GrapeCity.ActiveReports.PageReportModel.*	GrapeCity.ActiveReports.v12	GrapeCity.ActiveReports.Core.Rdl	On creating reports dynamically
   GrapeCity.ActiveReports.Rendering.IO.*	GrapeCity.ActiveReports.v12	GrapeCity.ActiveReports.Core.Rendering	On rendering to any rendering extension
   GrapeCity.ActiveReports.Extensibility.Rendering.Components.*	GrapeCity.ActiveReports.Extensibility.v12	GrapeCity.ActiveReports.Core.Rendering	On creating own rendering extensions or custom report items
   GrapeCity.ActiveReports.Extensibility.Data.*	GrapeCity.ActiveReports.Extensibility.v12	-	On using own data providers
   GrapeCity.ActiveReports.Dashboard.*	GrapeCity.ActiveReports.Dashboard.v12	GrapeCity.ActiveReports.Core.Rendering	-
   GrapeCity.ActiveReports.Calendar.*	GrapeCity.ActiveReports.Calendar.v12	Calendar is moved to samples	-
   GrapeCity.ActiveReports.Extensibility.Rendering.IRenderingExtension	GrapeCity.ActiveReports.Extensibility.v12	GrapeCity.ActiveReports	On creating own rendering extensions
   GrapeCity.ActiveReports.ReportData.DataProviders.*	GrapeCity.ActiveReports.v12	GrapeCity.ActiveReports.Core.DataProviders	On using CSV, JSON, Object, Xml, DataSet data providers
   GrapeCity.ActiveReports.ArsClient.*	GrapeCity.ActiveReports.ArsClient.v12	removed	-
   GrapeCity.ActiveReports.OracleClient.*	GrapeCity.ActiveReports.OracleClient.v12	GrapeCity.ActiveReports.Core.DataProviders	-

   
   
2. The following assemblies have been removed:
   
   • GrapeCity.ActiveReports.ArsClient
   • GrapeCity.ActiveReports.Calendar
   • GrapeCity.ActiveReports.Dashboard
   • GrapeCity.ActiveReports.Export.Document
   • GrapeCity.ActiveReports.Export.Image.Unsafe
   • GrapeCity.ActiveReports.Export.Xaml
   • GrapeCity.ActiveReports.Extensibility
     
3. Following ActiveReports Core assemblies have been added:
   
   • GrapeCity.ActiveReports.Core.DataProviders
   • GrapeCity.ActiveReports.Core.Drawing.Gdi
   • GrapeCity.ActiveReports.Core.Rdl
   • GrapeCity.ActiveReports.Core.Rendering
   • GrapeCity.ActiveReports.Core.Export.Text.Page
   • GrapeCity.ActiveReports.Core.Export.Excel.Page
   • GrapeCity.ActiveReports.Core.Export.Html.Page
4. Assembly GrapeCity.ActiveReports.Diagnostics is renamed to GrapeCity.ActiveReports.Core.Diagnostics.
   
5. Following assemblies are added that have back-ends for JsViewer and Web Designer components:
   • GrapeCity.ActiveReports.Aspnetcore.Viewer.dll
   • GrapeCity.ActiveReports.Aspnet.Viewer.dll
   • GrapeCity.ActiveReports.Aspnetcore.Designer.dl
   • GrapeCity.ActiveReports.Aspnet.Designer.dll
     
     
6. Flash and Silverlight viewers are now obsolete.
   
   
7. HTML5 Viewer is deprecated and will be obsolete in the future version.
   
   
8. Custom Data Providers have been modified as:
   
   • Removed extra classes and interfaces - DbCommand, DbConnection and others have been removed to reuse standard System.Data.* classes. Now implement System.Data.DataProviderFactory, System.Data.DbCommand, System.Data.DbConnection, System.Data.DbDataReader OR download any third-party implementation of those standard interfaces.  
   • Simplified using custom data providers -  The customer may just configure ActiveReports to start using of any ADO component.
     Note: Multivalue parameters, Credentials, and UI editor are available only if customer implements special adapter.
     To support setting of credentials and multivalue parameters, implement GrapeCity.ActiveReports.ReportData.DataProviders.DbConnectionAdapter.
   • Created data provider should be configured using ActiveReports.config - Specify name and data provider factory type. You may specify custom editor, adapter type (AdapterType attribute) and schema provider type (SchemaProviderType attribute).
   
   
9. LocateDataSourceEventArgs class which obtains data for LocateDataSource event has undergone following changes.
   • Following properties have been removed:
     • DataSetName:string
     • DataSourceName:string
     • Report:PageDocument
   • Following properties have been added:
     • DataSet:IDataSet
     • Report:ReportObjectModel.Report
     • Parameters:IReadonlyList<DataParameter>

   ActiveReports 12 approach	ActiveReports 13 approach
   class LocateDataSourceEventArgs{ public object Data {get;set;} public string DataSetName {get;} public string DataSourceName {get;} public PageDocument Report {get;} }	class LocateDataSourceEventArgs{ public object Data {get;set;} public IDataSet DataSet {get;} public Report Report {get;} public IReadonlyList<DataParameter> Parameters {get;} }

   Note: The ActiveReports 13 parameters are Query parameters, so if you want to obtain Subreport parameters (available in PageDocument in ActiveReports 12), you should map them to Query parameters first.
10. Custom Report Items have been modified as:
    
    • Most of the extra methods of ICustomReportItem interface (required for Flash) were dropped.
    • Now CRIs should implement IReportItemRenderersFactory interface.
    
    
11. HTML RE ILinkProvider
    Cleaned ILinkProvider interface with few new properties.
    
    
12. HTML RE
    HTML RE no more inherits IDisposable interface with Dispose method from HtmlRenderingExtension class (for WebViewer).
    

• The GrapeCity.ActiveReports.Expressions namespace is now GrapeCity.Enterprise.Data.DataEngine.Expressions.
• The hybrid expressions like =Theme.Constants("Name") & " - " & [OrderDate].Year are now evaluated as 'render time' expressions.
• ActiveReports 12 is not supported in Microsoft Visual Studio 2010.
• Flash and Silverlight viewers are deprecated.

Control Changes

The Excel Transformation Device option, the File menu item Microsoft Excel WorkSheet - Data (XLS), is no longer available for RDL reports in the default export dialogs of the viewer and designer applications shipped with the product. For backward compatibility, the Excel Transformation Device API is still available, but it does not support the new Tablix control. In order to successfully export reports using the new Tablix control, please use the Excel Rendering Extension option, the File menu item Microsoft Excel WorkSheet - Layout (XLS, XLSX).

The Matrix data region has been replaced in the toolbox with the new Tablix data region. However, it is still available in the API for backward compatibility.

The OleObject control is now hidden by default in the toolbox for Section reports. To show this control in Visual Studio, open the GrapeCity.ActiveReports.config file and change the EnableOleObject value to true, and include this file with your application. You can find this file here: C:\Program Files (x86)\Common Files\GrapeCity\ActiveReports 12.

To show the OleObject control in the Designer control in your own end users designer applications, select the Designer control and, in the Properties window, change the EnableOleObject property to True.

The WebViewer control is now AJAX-based, and requires ActiveReports.ReportService.asmx to be in the root of the Web site or Web application. This is added automatically when you drop a WebViewer control on a Web form, or you can add it from the Add New Item dialog by selecting ActiveReports 12 Web Service, or manually by copying it from C:\Program Files (x86)\Common Files\GrapeCity\ActiveReports 12. ExceptionOccurring, QueuingReport, ReportCreating and ReportDisposing events are no longer available in WebViewer class.

The Viewer control no longer has Annotations turned on by default. To enable Annotations, set the AnnotationDropDownVisible property of the Viewer control to True. DataDynamics.ActiveReports.Viewer.ReportViewer.MultiplePageMode property is now integrated into ViewType property of Viewer class. Viewer.ReportViewer.PaperColor property has been removed. Viewer.PageOffset property's type has been changed from Integer to System.Drawing.Point.

The Toolbar is now a Windows ToolStrip. Please see the MSDN ToolStrip Class for more information.

In RDL and Page reports, the default behavior of the Series Border Style setting for Area, Pie and Doughnut chart types has been changed. Now, the default value of this setting is None, thus no style formatting is applied.

Other Changes

Rendering Extensions (Image): ColorDepth is an obsolete property of GrapeCity.ActiveReports.Export.Image.Page.Settings class.
 
Expressions: In Page report and RDL report expressions, "True" and "False" values are now handled as String, and not as Boolean values.
For example, =IIF(Fields!FieldName.Value = "True", 1, 0) is now an invalid expression when FieldName.Value returns a Boolean value, instead, use  =IIF(Fields!FieldName.Value = True, 1, 0) expression.

Classes in Different Namespaces

In ActiveReports 12, some classes have been moved to different namespaces from previous versions of ActiveReports and Data Dynamics Reports. Drop down the table below to see some of the most commonly used classes that are in new namespaces.

Namespace Changes and Restructuring

Some of the changes that are not picked up by the upgrade tool may cause some issues in your code. The two most frequently encountered changes are:

• DataDynamics.ActiveReports.ActiveReport is now GrapeCity.ActiveReports.SectionReport
• DataDynamics.ActiveReports.Document.Document is now GrapeCity.ActiveReports.Document.SectionDocument

These are all of the assemblies and namespaces that have changed, with any major changes noted.

ActiveReports is now GrapeCity.ActiveReports.v12

ActiveReports.Chart is now GrapeCity.ActiveReports.Chart.v12

ActiveReports.Design is now GrapeCity.ActiveReports.Design.Win.v12

ActiveReports.Document is now GrapeCity.ActiveReports.Document.v12

ActiveReports.HtmlExport is now GrapeCity.ActiveReports.Export.Html.v12

ActiveReports.PdfExport is now GrapeCity.ActiveReports.Export.Pdf.v12

ActiveReports.RtfExport is now GrapeCity.ActiveReports.Export.Word.v12

ActiveReports.Silverlight is now GrapeCity.ActiveReports.Viewer.Silverlight.v12

ActiveReports.TextExport is now GrapeCity.ActiveReports.Export.Xml.v12

ActiveReports.TiffExport is now GrapeCity.ActiveReports.Export.Image.v12

ActiveReports.Viewer is now GrapeCity.ActiveReports.Viewer.Win.v12

ActiveReports.Web is now GrapeCity.ActiveReports.Web.v12

ActiveReports.XlsExport is now GrapeCity.ActiveReports.Export.Excel.v12