Package.CreatePart Method (Uri, String)


Creates a new uncompressed part with a given URI and content type.

Namespace:   System.IO.Packaging
Assembly:  WindowsBase (in WindowsBase.dll)

Public Function CreatePart (
	partUri As Uri,
	contentType As String
) As PackagePart


Type: System.Uri

The uniform resource identifier (URI) of the new part.

Type: System.String

The content type of the data stream.

Return Value

Type: System.IO.Packaging.PackagePart

The new created part.

Exception Condition

partUri or contentType is null.


partUri is not a valid PackagePart URI.


A part with the specified partUri is already present in the package.


The package is not open (Dispose or Close has been called).


The package is read-only (a new part cannot be added).

CreatePart initializes an empty Stream for the new part. The PackagePart.GetStream method can be used to obtain a reference to the stream instance associated with the part.

The part CompressionOption is CompressionOption.NotCompressed.

For additional information about package parts, see section 1.1 in the Open Packaging Conventions (OPC) specification available for download at

Notes to Inheritors:

CreatePart internally calls the derived class's CreatePartCore method to actually create the part based on the physical format implemented in the derived class.

The following example shows how to create a new PackagePart and then store data into the part. For the complete sample, see Writing a Package Sample.

' Add the Document part to the Package
Dim packagePartDocument As PackagePart = package.CreatePart(partUriDocument, System.Net.Mime.MediaTypeNames.Text.Xml)

' Copy the data to the Document Part
Using fileStream As New FileStream(documentPath, FileMode.Open, FileAccess.Read)
    CopyStream(fileStream, packagePartDocument.GetStream())
End Using ' end:using(fileStream) - Close and dispose fileStream.

.NET Framework
Available since 3.0
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