PackagePart.GetStream Method (FileMode, FileAccess)


Returns the part content stream opened with a specified FileMode and FileAccess.

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

public Stream GetStream(
	FileMode mode,
	FileAccess access


Type: System.IO.FileMode

The I/O mode in which to open the content stream.

Type: System.IO.FileAccess

The access permissions to use in opening the content stream.

Return Value

Type: System.IO.Stream

The content stream for the part.

Exception Condition

The part has been deleted.


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


The mode parameter is not a valid FileMode enumeration value.


The access parameter is not a valid FileAccess enumeration value.


mode or access is not compatible with the package and part stream.


The access parameter is specified as Read but the mode parameter requires write access. (FileMode values of Create, CreateNew, Truncate, and Append require Write or ReadWrite access.)


The stream object returned by the GetStreamCore method of the derived subclass is null.

Notes to Implementers:

Notes to Callers:

GetStream internally calls the derived GetStreamCore method to actually open and return the part data stream based on the physical format implemented in the derived class.

By default, the ZipPackagePart subclass implementation of the abstract PackagePart class is provided and used. In the default operation, GetStream internally calls GetStreamCore of the ZipPackagePart class to open and return the part data stream from a ZIP file.

.NET Framework
Available since 3.0
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