IPrxPartialPersist.LoadFromStream

Syntax

LoadFromStream(Options: Integer; Stream: IIOStream);

Parameters

Options. The parameter is reserved. 0 is to be passed.

Stream. The stream, from which the report is loaded.

Description

The LoadFromStream method restores report from a stream.

Comments

This method is used together with IPrxPartialPersist.SaveToStream.

Example

Executing the example requires that the repository contains a regular report, which has an assigned event handler containing the code given below. The following system assemblies should be connected for the event handler: Io, Report, Ui.

Class EventsClass: ReportEvents

    Public Sub OnBeforeExecuteReport(Report: IPrxReport; Var Cancel: Boolean);
    Var
        stSaved: IIOStream;
    Begin
        If Not WinApplication.ConfirmationBox("Load saved?") Then
            Return;
        End If;
        stSaved := New FileStream.Create("c:\MyReport.rep", FileOpenMode.Read, FileShare.Exclusive);
        Try
            (Report As IPrxPartialPersist).LoadFromStream(0, stSaved);
        Finally
            Dispose stSaved;
        End Try;
        Cancel := True;
    End Sub OnBeforeExecuteReport;

    Public Sub OnAfterExecuteReport(Report: IPrxReport);
    Var
        stFile: IIOStream;
    Begin
        If Not WinApplication.ConfirmationBox("Save calculated?") Then
            Return;
        End If;
        stFile := New FileStream.Create("c:\MyReport.rep", FileOpenMode.Create, FileShare.Exclusive);
        Try
            (Report As IPrxPartialPersist).SaveToStream(0, stFile);
        Finally
            Dispose stFile;
        End Try;
    End Sub OnAfterExecuteReport;

End Class EventsClass;

After report calculation the following message is displayed: Save calculated?. If the answer is Yes, the report is saved to the specified file and report sheets are cleared. The following message is displayed before report calculation: Load saved?. Answer Yes to load report from the specified file. The report is not calculated.