IWebDocumentViewerReportResolver Interface

If implemented, resolves reports to display in the Web Document Viewer by their unique names.

Namespace: DevExpress.XtraReports.Web.WebDocumentViewer

Assembly: DevExpress.XtraReports.v18.2.Web.dll

Declaration

C#

public interface IWebDocumentViewerReportResolver

VB.NET

Public Interface IWebDocumentViewerReportResolver

Remarks

The default report resolver tries to load a report from a report storage based on the report’s unique name.

To provide a custom report resolver, create a class that implements the IWebDocumentViewerReportResolver interface.

The following example demonstrates how to resolve a report based on its name or type name if the report with this name does not exist.

C#

using DevExpress.XtraReports.Web.WebDocumentViewer;
using DevExpress.XtraReports.UI;
// ...

public class CustomWebDocumentViewerReportResolver : IWebDocumentViewerReportResolver {
    public CustomWebDocumentViewerReportResolver() { }

    public XtraReport Resolve(string reportUniqueName) {
        switch (reportUniqueName) {
            case "Report1":
                return new XtraReport1();
            case "Report2":
                return new XtraReport2();
            default:
                // Try to create a report using the fully qualified type name.
                Type t = Type.GetType(reportUniqueName);
                return typeof(XtraReport).IsAssignableFrom(t) ?
                    (XtraReport)Activator.CreateInstance(t) :                
                    null;                                             
        }      
    }
}

VB.NET

Imports DevExpress.XtraReports.Web.WebDocumentViewer
Imports DevExpress.XtraReports.UI
' ...

Public Class CustomWebDocumentViewerReportResolver
    Implements IWebDocumentViewerReportResolver
    Public Sub New()
    End Sub

    Public Function Resolve(ByVal reportUniqueName As String) As XtraReport
        Select Case reportUniqueName
            Case "Report1"
                Return New XtraReport1()
            Case "Report2"
                Return New XtraReport2()
            Case Else
                ' Try to create a report using the fully qualified type name.
                Dim t As Type = Type.GetType(reportUniqueName)
                Return If(GetType(XtraReport).IsAssignableFrom(t), CType(Activator.CreateInstance(t), XtraReport), Nothing)
        End Select
    End Function
End Class

Then, register your custom report resolver at the application’s startup.

• ASP.NET WebForms and ASP.NET MVC

  C#

  using DevExpress.XtraReports.Web.WebDocumentViewer;
  
  void Application_Start(object sender, EventArgs e) {
      DefaultWebDocumentViewerContainer.Register<IWebDocumentViewerReportResolver, CustomWebDocumentViewerReportResolver>();
  }
  

  VB.NET

  Imports DevExpress.XtraReports.Web.WebDocumentViewer
  
  Private Sub Application_Start(sender As Object, e As EventArgs)
      DefaultWebDocumentViewerContainer.Register(Of IWebDocumentViewerReportResolver, CustomWebDocumentViewerReportResolver)()
  End Sub
  

• ASP.NET Core

  C#

  using DevExpress.XtraReports.Web.WebDocumentViewer;
  
  public void ConfigureServices(IServiceCollection services) {
      // ...
      services.AddSingleton<IWebDocumentViewerReportResolver, CustomWebDocumentViewerReportResolver>();
  }