Package.CreateRelationship Method

Source:

Package.cs

Source:

Package.cs

Source:

Package.cs

public:
 System::IO::Packaging::PackageRelationship ^ CreateRelationship(Uri ^ targetUri, System::IO::Packaging::TargetMode targetMode, System::String ^ relationshipType);

public System.IO.Packaging.PackageRelationship CreateRelationship (Uri targetUri, System.IO.Packaging.TargetMode targetMode, string relationshipType);

member this.CreateRelationship : Uri * System.IO.Packaging.TargetMode * string -> System.IO.Packaging.PackageRelationship

Public Function CreateRelationship (targetUri As Uri, targetMode As TargetMode, relationshipType As String) As PackageRelationship

Parameters

Returns

The package-level relationship to the specified part.

Exceptions

Examples

The following example illustrates how to use CreateRelationship to create a PackageRelationship between a Package and a root document part. For the complete sample, see Writing a Package Sample.

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

// 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
package.CreateRelationship(packagePartDocument.Uri,
                           TargetMode.Internal,
                           PackageRelationshipType);

' 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.

' Add a Package Relationship to the Document Part
package.CreateRelationship(packagePartDocument.Uri, TargetMode.Internal, PackageRelationshipType)

Remarks

A package-level relationship defines an association between the package and an associated target part or resource. A package-level relationship can be one of two forms.

• Between a Package to a target part in the package.

• Between a Package to a target resource outside the package.

In a package-relationship the package is considered the "owner" of the relationship. When the package is deleted, all the relationships owned by the package are also deleted.

CreateRelationship does not physically change the target part or resource in any way.

The target of a relationship cannot be another relationship.

If targetMode is specified as Internal, targetUri must be a relative URI that is formed according to the RFC 3986 Uniform Resource Identifier (URI) Generic Syntax specification. The internal relative URI can be either an absolute path that starts with a forward slash ("/") character such as "/page1.xaml" or "/images/picture4.jpg", or a relative path such as "../imagespicture1.jpg" that resolves against the package root ("/") as the base URI.

If targetMode is specified as External, targetUri can be either an absolute or relative URI formed according to the RFC 3986 Uniform Resource Identifier (URI) Generic Syntax specification. http://www.microsoft.com/page2.xml is an example of an absolute URI that references an external target resource "page2.xml". "images/picture1.jpg" is an example of a relative URI that also references an external target resource "1.jpg" but which resolves against the URI of the package itself.

relationshipType must be a URI that is formed according to the RFC 3986 Uniform Resource Identifier (URI) Generic Syntax specification. The following table shows the package-level relationshipType URIs defined by the Open Packaging Conventions (OPC) specification.

For more information about packaging and package relationships, see section 1.3 of the Open Packaging Conventions (OPC) specification available for download at https://www.ecma-international.org/publications-and-standards/standards/ecma-376/.

See also

• DeleteRelationship(String)
• GetRelationship(String)
• GetRelationships()
• GetRelationshipsByType(String)
• RelationshipExists(String)

Source:

Package.cs

Source:

Package.cs

Source:

Package.cs

public:
 System::IO::Packaging::PackageRelationship ^ CreateRelationship(Uri ^ targetUri, System::IO::Packaging::TargetMode targetMode, System::String ^ relationshipType, System::String ^ id);

public System.IO.Packaging.PackageRelationship CreateRelationship (Uri targetUri, System.IO.Packaging.TargetMode targetMode, string relationshipType, string id);

public System.IO.Packaging.PackageRelationship CreateRelationship (Uri targetUri, System.IO.Packaging.TargetMode targetMode, string relationshipType, string? id);

member this.CreateRelationship : Uri * System.IO.Packaging.TargetMode * string * string -> System.IO.Packaging.PackageRelationship

Public Function CreateRelationship (targetUri As Uri, targetMode As TargetMode, relationshipType As String, id As String) As PackageRelationship

Parameters

Returns

The package-level relationship to the specified part.

Exceptions

Examples

The following example illustrates how to use CreateRelationship to create a PackageRelationship between a Package and a root document part. For the complete sample, see Writing a Package Sample.

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

// 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
package.CreateRelationship(packagePartDocument.Uri,
                           TargetMode.Internal,
                           PackageRelationshipType);

' 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.

' Add a Package Relationship to the Document Part
package.CreateRelationship(packagePartDocument.Uri, TargetMode.Internal, PackageRelationshipType)

Remarks

A package-level relationship defines an association between the package and an associated target part or resource. A package-level relationship can be one of two forms.

• Between a Package to a target part in the package.

• Between a Package to a target resource outside the package.

In a package-relationship the package is considered the "owner" of the relationship. When the package is deleted, all the relationships owned by the package are also deleted.

CreateRelationship does not physically change the target part or resource in any way.

The target of a relationship cannot be another relationship.

id must be a valid XML identifier. The id type is xsd:ID and must follow the naming conventions prescribed in the XML Schema Part 2: Datatypes specification (see https://www.w3.org/TR/xmlschema-2/#ID).

If id is specified as null a unique ID will be automatically generated. An id specified by an empty string is not valid.

If targetMode is specified as Internal, targetUri must be a relative URI that is formed according to the RFC 3986 Uniform Resource Identifier (URI) Generic Syntax specification. The internal relative URI can be either an absolute path that starts with a forward slash ("/") character such as "/page1.xaml" or "/images/picture4.jpg", or a relative path such as "../imagespicture1.jpg" that resolves against the package root ("/") as the base URI.

If targetMode is specified as External, targetUri can be either an absolute or relative URI formed according to the RFC 3986 Uniform Resource Identifier (URI) Generic Syntax specification. http://www.microsoft.com/page2.xml is an example of an absolute URI that references an external target resource "page2.xml". "images/picture1.jpg" is an example of a relative URI that also references an external target resource "1.jpg" but which resolves against the URI of the package itself.

relationshipType must be a URI that is formed according to the RFC 3986 Uniform Resource Identifier (URI) Generic Syntax specification. The following table shows the package-level relationshipType URIs defined by the Open Packaging Conventions (OPC) specification.

For additional information about packaging and package relationships, see section 1.3 of the Open Packaging Conventions (OPC) specification available for download at https://www.ecma-international.org/publications-and-standards/standards/ecma-376/.

See also

• CreateRelationship(Uri, TargetMode, String)
• DeleteRelationship(String)
• GetRelationship(String)
• GetRelationships()
• GetRelationshipsByType(String)
• RelationshipExists(String)