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XtraReport.FromStream(Stream, Boolean) Method

Loads the report definition data from the specified stream and creates a report object from it. The created report’s class is also specified in the REPX data format.

Namespace: DevExpress.XtraReports.UI

Assembly: DevExpress.XtraReports.v23.1.dll

NuGet Package: DevExpress.Reporting.Core


public static XtraReport FromStream(
    Stream stream,
    bool loadState = true


Name Type Description
stream Stream

The Stream object containing the REPX or XML data to load.

Optional Parameters

Name Type Default Description
loadState Boolean True

true to load the report’s state that is also saved in the REPX or XML data; otherwise, false.


Type Description

An XtraReport class or its descendant of the type specified in the REPX or XML data.



Deserialization of reports received from untrusted parties can trigger the execution of malicious code, which can either be directly embedded in the report definition or contained in an external assembly referenced by the report.

To avoid this, we recommend that you use XML serialization instead of CodeDOM (so that reports can be safely deserialized using the XtraReport.LoadLayoutFromXml method instead of the less secure LoadLayout method) and prevent any untrusted third-party libraries from being available on the server.

The CodeDOM serialization is not supported under the Full Trust permission level, and XML serialization is the only option to save reports.

Use this method to create a report instance from the report definition data stored in the specified stream. Note that to be able to create the report, this method should find the class type of the report being created (the report class type name is stored in the REPX data header). This type is searched for in the following assemblies:

  1. The assembly (the .EXE or .DLL file) that produced the report definition data. Its path is also mentioned in the report definition’s header.
  2. The current assembly where the FromStream method is called.
  3. The assemblies referenced by the current assembly.
  4. The loaded assemblies.

If this class type is not found, an instance of the XtraReport class is created.

The saved state can be applied to the created report instance if the loadState parameter is set to true.


This example demonstrates how to save a report definition to a stream (assigned to a corresponding ASP.NET Session) as a REPX file and restored back by using the XtraReport.SaveLayout and XtraReport.FromStream methods.

using System.IO;
using DevExpress.XtraReports.UI;
// ...

private void StoreReport(XtraReport report) {
   // Create a stream.
   MemoryStream stream = new MemoryStream();

   // Save a report to the stream.

   // Save the stream to a session.
   Session["report_stream"] = stream;

private XtraReport RestoreReport() {
   // Restore the stream from the session.
   MemoryStream stream = (MemoryStream)Session["report_stream"];

   // Create a report from the stream.
   return XtraReport.FromStream(stream, true);
See Also