The report layouts  that are kept in simple hard disk files is so trivial for modern world, that a lot of programmers want to use databases for the storing of reports. This article does not describe how to store the report in database, however you can find here the detailed information about opening of the already stored reports. The reports saved in database or in the resource files can be opened via custom ResourceLocator class.

Here is a sample of ResourceLocator that opens report saved in dataset:

(C#)

using System;
using System.Data;
using DataDynamics.Reports.Extensibility;

namespace myNamespace
{
    internal class myLocator : ResourceLocator
    {
        public override Resource GetResource(ResourceInfo resourceInfo)
        {
            Resource res;
            if (resourceInfo.Name.LastIndexOf("ReportName") > 0)
            {
                DataSet ds = frmPreview.GetData();
                DataView dv = ds.Tables[0].DefaultView;
                dv.RowFilter = "Reportname='ReportName'";
                System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding();
                System.IO.MemoryStream ms = new System.IO.MemoryStream(enc.GetBytes(dv[0]["Reportsource"].ToString()));
                res = new Resource(ms, new Uri("DDReport:"));
            }

            if (res.Value == null) {
                throw new Exception("The report was not found!");
            }
            return res;
        }
    }
}

(VB.NET)

Imports DataDynamics.Reports.Extensibility

Friend Class myLocator
    Inherits ResourceLocator

    Public Overrides Function GetResource(ByVal resourceInfo As DataDynamics.Reports.Extensibility.ResourceInfo) As
DataDynamics.Reports.Extensibility.Resource
        Dim res As Resource = Nothing
        If resourceInfo.Name.LastIndexOf("ReportName") > 0 Then
            Dim ds As DataSet = frmPreview.GetData()
            Dim dv As DataView = ds.Tables(0).DefaultView()
            dv.RowFilter = "Reportname='ReportName'"
            Dim enc As New System.Text.UTF8Encoding
            Dim ms As IO.MemoryStream = New IO.MemoryStream(enc.GetBytes(dv(0)("Reportsource").ToString()))
            res = New Resource(ms, New Uri("DDReport:"))
        End If

        If res.Value Is Nothing Then
            Throw New Exception("The report was not found!")
        End If

        Return res
    End Function
End Class

Note :
1) Do not forget to bind the resource locator with the report, e.g.:

(C#)
   DataDynamics.Reports.ReportDefinition repd =new DataDynamics.Reports.ReportDefinition(t_reader);
   repd.ResourceLocator = new myLocator();

(VB.NET)
   Dim repd As New DataDynamics.Reports.ReportDefinition(t_reader)
   repd.ResourceLocator = New myLocator

2) In the "Jump to report" box of JumpToReport action you will need to
set the DDReport:ReportName.