IWebDocumentViewerReportResolver Interface

Associates string values with report instances. Does not operate in asynchronous mode.

Namespace : DevExpress.XtraReports.Web.WebDocumentViewer

Assembly : DevExpress.XtraReports.v25.2.Web.dll

NuGet Package : DevExpress.Web.Reporting.Common

Declaration

C#
VB.NET

csharp

public interface IWebDocumentViewerReportResolver

Public Interface IWebDocumentViewerReportResolver

Remarks

The built-in report resolver uses a report’s unique name to load a report from storage.

Note

The IWebDocumentViewerReportResolver service does not operate in asynchronous mode.

To implement a custom report resolver, create a class and register it.

Create a Class

Create a class that implements the IWebDocumentViewerReportResolver interface.

The following example demonstrates a custom resolver that attempts to locate a match for a report name. If no match is found, it attempts to instantiate a type with the specified name.

C#
VB.NET

csharp

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;                                             
        }      
    }
}

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

Register a Resolver

ASP.NET Web Forms and ASP.NET MVC

C#
VB.NET

csharp

using DevExpress.XtraReports.Web.WebDocumentViewer;

void Application_Start(object sender, EventArgs e) {
    DefaultWebDocumentViewerContainer.Register<IWebDocumentViewerReportResolver, CustomWebDocumentViewerReportResolver>();
}

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

csharp

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddSingleton<IWebDocumentViewerReportResolver, CustomWebDocumentViewerReportResolver>();    

var app = builder.Build();

Note

Review the Open a Report in ASP.NET Core Application help topic for more information.