Seeking is not supported in a System.IO.Packaging.ZipWrappingStream

Environment

Product

Progress® Telerik® Reporting

Description

I am using the ReportPackager class to unpackage and modify my TRDP report in code, however, the errors listed below are thrown upon doing so.

Steps to Reproduce

1. The project targets .NET or .NET Core.
2. The Telerik.Reporting.dll built for .NET Framework is referenced in the project.
3. A TRDP file is being unpackaged in code as shown in the Packaging and Unpackaging Report Definitions article.

Error Message

Unhandled exception. System.NotSupportedException: Seeking is not supported in a System.IO.Packaging.ZipWrappingStream
    at Telerik.Reporting.Utils.StreamExtensions.ToArray(Stream input)
    at Telerik.Reporting.ReportSerialization.Current.ImageContainerHelper.ResolveValue(String image, IResourceHandler handler)
    at Telerik.Reporting.ReportSerialization.Current.ImageContainerHelper.GetDeserializedValue(IImageContainerSerializable source, IResourceHandler handler)
    at Telerik.Reporting.ReportSerialization.Current.PictureBoxSurrogate.GetDeserializedObject(PictureBoxSerializable surrogate, IResourceHandler handler)
    at Telerik.Reporting.ReportSerialization.SerializationSurrogate`2.Telerik.Reporting.Serialization.ISerializationSurrogate.GetDeserializedObject(Object o, IResourceHandler handler)
    at Telerik.Reporting.Serialization.SurrogateSelectorHierarchy.GetDeserializedObject(Object o, IResourceHandler handler)
    at Telerik.Reporting.Serialization.ObjectReader.ReadObject(Type type)
    at Telerik.Reporting.Serialization.ObjectReader.ReadXmlElement(String name)
    at Telerik.Reporting.Serialization.ObjectReader.ReadCollection(Object collection)
    at Telerik.Reporting.Serialization.ObjectReader.ReadProperties(Object obj)
    at Telerik.Reporting.Serialization.ObjectReader.ReadObject(Type type)
    at Telerik.Reporting.Serialization.ObjectReader.ReadXmlElement(String name)
    at Telerik.Reporting.Serialization.ObjectReader.ReadCollection(Object collection)
    at Telerik.Reporting.Serialization.ObjectReader.ReadProperties(Object obj)
    at Telerik.Reporting.Serialization.ObjectReader.ReadObject(Type type)
    at Telerik.Reporting.Serialization.ObjectReader.ReadXmlElement(String name)
    at Telerik.Reporting.Serialization.ObjectReader.ReadCollection(Object collection)
    at Telerik.Reporting.Serialization.ObjectReader.ReadProperties(Object obj)
    at Telerik.Reporting.Serialization.ObjectReader.ReadObject(Type type)
    at Telerik.Reporting.Serialization.ObjectReader.ReadXmlElement(String name)
    at Telerik.Reporting.XmlSerialization.XmlSerializerBase.Deserialize(Stream stream, IResourceHandler resourceHandler)
    at Telerik.Reporting.XmlSerialization.ReportXmlSerializer.Telerik.Reporting.ReportSerialization.IXmlSerializer.Deserialize(Stream stream, IResourceHandler resourceHandler)
    at Telerik.Reporting.ReportPackager.UnpackageDocument(Stream packageStream)

Cause

The .NET or .NET Core project references the Telerk.Reporting.dll assembly built for .NET Framework. The ZipWrappingStream is a class that does not exist in the full .NET Framework.

Solution

Use the Telerik.Reporting NuGet package. The package manager will automatically determine which Telerik.Reporting.dll assembly to use in your project based on the target framework.

Alternatively, if assembly references must be used, use the Telerik.Reporting.dll located in the Bin\netstandard2.0 subdirectory of where Telerik Reporting is installed. For example:

C:\Program Files (x86)\Progress\Telerik Reporting \Bin\netstandard2.0

See Also

• Adding the Telerik Private NuGet Feed to VS
• Restoring NuGet Packages in Your CI Workflow