IOpcDigitalSignatureEnumerator::GetCurrent method (msopc.h)

Article
10/13/2021

Gets the IOpcDigitalSignature interface pointer at the current position of the enumerator.

Syntax

HRESULT GetCurrent(
  [out, retval] IOpcDigitalSignature **digitalSignature
);

Parameters

[out, retval] digitalSignature

An IOpcDigitalSignature interface pointer.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code/value	Description
S_OK	The method succeeded.
E_POINTER	The partReference parameter is NULL.
OPC_E_ENUM_COLLECTION_CHANGED 0x80510050	The enumerator is invalid because the underlying set has changed.
OPC_E_ENUM_INVALID_POSITION 0x80510053	The enumerator cannot perform this operation from its current position.
OPC_E_DS_DUPLICATE_PACKAGE_OBJECT_REFERENCES 0x8051002D	The signature markup contains more than one Reference element that refers to the package Object element, but only one such Reference is allowed.
OPC_E_DS_DUPLICATE_SIGNATURE_PROPERTY_ELEMENT 0x80510028	The signature markup contains more than one SignatureProperty element that has the same Id attribute.
OPC_E_DS_EXTERNAL_SIGNATURE_REFERENCE 0x8051002F	A Reference element in the signature markup indicates an object that is external to the package. Reference elements must point to parts or Object elements that are internal.
OPC_E_DS_INVALID_CANONICALIZATION_METHOD 0x80510022	An unsupported canonicalization method was requested or used in a signature.
OPC_E_DS_INVALID_SIGNATURE_COUNT 0x8051002B	A Signature part does not contain the signature markup for exactly one signature.
OPC_E_DS_INVALID_SIGNATURE_XML 0x8051002A	The signature markup in a Signature part does not conform to the schema specified in the OPC or XML-Signature Syntax and Processing (http://www.w3.org/TR/xmldsig-core/).
OPC_E_DS_MISSING_CANONICALIZATION_TRANSFORM 0x80510032	A relationships transform must be followed by a canonicalization method.
OPC_E_DS_MISSING_PACKAGE_OBJECT_REFERENCE 0x8051002E	The signature markup is missing a Reference to the package-specific Object element.
OPC_E_DS_MISSING_SIGNATURE_ALGORITHM 0x8051002C	The signature markup does not specify signature method algorithm.
OPC_E_DS_MISSING_SIGNATURE_PART 0x80510020	The specified Signature part does not exist in the package.
OPC_E_DS_MISSING_SIGNATURE_PROPERTIES_ELEMENT 0x80510026	The SignatureProperties element was not found in the signature markup.
OPC_E_DS_MISSING_SIGNATURE_PROPERTY_ELEMENT 0x80510027	The SignatureProperty child element of the SignatureProperties element was not found.
OPC_E_DS_MISSING_SIGNATURE_TIME_PROPERTY 0x80510029	The SignatureProperty element with the Id attribute value of "idSignatureTime" does not exist or is not correctly constructed.
OPC_E_DS_MULTIPLE_RELATIONSHIP_TRANSFORMS 0x80510031	More than one relationships transform is specified for a Reference element, but only one relationships transform is allowed.
OPC_E_DS_REFERENCE_MISSING_CONTENT_TYPE 0x80510030	The URI attribute value of a Reference element in the signature markup does not include the content type of the referenced part.
OPC_E_DS_SIGNATURE_REFERENCE_MISSING_URI 0x80510043	The URI attribute is required for a Reference element but is missing.
OPC_E_UNEXPECTED_CONTENT_TYPE 0x80510005	Either the content type of a part differed from the expected content type (specified in the OPC, ECMA-376 Part 2), or the part content did not match the part's content type.

Remarks

When an enumerator is created, the current position precedes the first pointer. To set the current position to the first pointer of the enumerator, call the MoveNext method after creating the enumerator.

Thread Safety

Packaging objects are not thread-safe.

For more information, see the Getting Started with the Packaging API.

Requirements

Requirement	Value
Minimum supported client	Windows 7 [desktop apps only]
Minimum supported server	Windows Server 2008 R2 [desktop apps only]
Target Platform	Windows
Header	msopc.h