Package.Open Method (String)


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Opens a package at a given path and file name.

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

public static Package Open(
	string path


Type: System.String

The path and file name of the package.

Return Value

Type: System.IO.Packaging.Package

The opened package.

Exception Condition

path is null.

ZipPackage is the default package type that is used by the Open method.

This Open method opens the package with default attributes OpenOrCreate, ReadWrite, and None (to specify different attributes use one of the other Open method overloads).

For additional information, see the Open Packaging Conventions (OPC) specification available for download at

The following example shows how to create a new Package that incorporates PackageRelationship and PackagePart elements together with stored data. For the complete sample, see Writing a Package Sample.

//  -------------------------- CreatePackage --------------------------
/// <summary>
///   Creates a package zip file containing specified
///   content and resource files.</summary>
private static void CreatePackage()
    // Convert system path and file names to Part URIs. In this example
    // Uri partUriDocument /* /Content/Document.xml */ =
    //     PackUriHelper.CreatePartUri(
    //         new Uri("Content\Document.xml", UriKind.Relative));
    // Uri partUriResource /* /Resources/Image1.jpg */ =
    //     PackUriHelper.CreatePartUri(
    //         new Uri("Resources\Image1.jpg", UriKind.Relative));
    Uri partUriDocument = PackUriHelper.CreatePartUri(
                              new Uri(documentPath, UriKind.Relative));
    Uri partUriResource = PackUriHelper.CreatePartUri(
                              new Uri(resourcePath, UriKind.Relative));

    // Create the Package
    // (If the package file already exists, FileMode.Create will
    //  automatically delete it first before creating a new one.
    //  The 'using' statement insures that 'package' is
    //  closed and disposed when it goes out of scope.)
    using (Package package =
        Package.Open(packagePath, FileMode.Create))
        // Add the Document part to the Package
        PackagePart packagePartDocument =

        // Copy the data to the Document Part
        using (FileStream fileStream = new FileStream(
               documentPath, FileMode.Open, FileAccess.Read))
            CopyStream(fileStream, packagePartDocument.GetStream());
        }// end:using(fileStream) - Close and dispose fileStream.

        // Add a Package Relationship to the Document Part

        // Add a Resource Part to the Package
        PackagePart packagePartResource =

        // Copy the data to the Resource Part
        using (FileStream fileStream = new FileStream(
               resourcePath, FileMode.Open, FileAccess.Read))
            CopyStream(fileStream, packagePartResource.GetStream());
        }// end:using(fileStream) - Close and dispose fileStream.

        // Add Relationship from the Document part to the Resource part
                                new Uri(@"../resources/image1.jpg",

    }// end:using (Package package) - Close and dispose package.

}// end:CreatePackage()

//  --------------------------- CopyStream ---------------------------
/// <summary>
///   Copies data from a source stream to a target stream.</summary>
/// <param name="source">
///   The source stream to copy from.</param>
/// <param name="target">
///   The destination stream to copy to.</param>
private static void CopyStream(Stream source, Stream target)
    const int bufSize = 0x1000;
    byte[] buf = new byte[bufSize];
    int bytesRead = 0;
    while ((bytesRead = source.Read(buf, 0, bufSize)) > 0)
        target.Write(buf, 0, bytesRead);
}// end:CopyStream()

.NET Framework
Available since 3.0
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