Photos Metadata Export

  1. Photos Metadata Export Files
  2. Extract Metadata From Jpg
  3. Keep The Date Images
  4. Photos Metadata Export Service

In Windows Communication Foundation (WCF), exporting metadata is the process of describing service endpoints and projecting them into a parallel, standardized representation that clients can use to understand how to use the service. Importing service metadata is the process of generating ServiceEndpoint instances or parts from service metadata.

From what I can tell, the embedded metadata (e.g. EXIF / IPTC) in the image files is not updated if changes are made within Google Photos, for example if the dates are updated using the Google Photos UI. Instead, Google's metadata comes out in the accompanying JSON files. Jul 28, 2020 However, the metadata for the photos themselves will be stripped away upon export. If you want to keep that, you have a few options, none of which will be quite as easy: 1) Manually export photos.

Exporting Metadata

To export metadata from System.ServiceModel.Description.ServiceEndpoint instances, use an implementation of the MetadataExporter abstract class. The WsdlExporter type is the implementation of the MetadataExporter abstract class included with WCF.

The System.ServiceModel.Description.WsdlExporter type generates Web Services Description Language (WSDL) metadata with attached policy expressions encapsulated in a MetadataSet instance. You can use a System.ServiceModel.Description.WsdlExporter instance to iteratively export metadata for ContractDescription objects and ServiceEndpoint objects. You can also export a collection of ServiceEndpoint objects and associate them with a specific service name.



You can only use the WsdlExporter to export metadata from ContractDescription instances that contain common language runtime (CLR) type information, such as a ContractDescription instance created using the ContractDescription.GetContract method or created as part of the ServiceDescription for a ServiceHost instance. You cannot use the WsdlExporter to export metadata from ContractDescription instances imported from service metadata or constructed without type information.

Importing Metadata

Importing WSDL Documents

To import service metadata in WCF, use an implementation of the MetadataImporter abstract class. The System.ServiceModel.Description.WsdlImporter type is the implementation of the MetadataImporter abstract class included with WCF. The WsdlImporter type imports WSDL metadata with attached policies bundled in a MetadataSet object.

The WsdlImporter type gives you control over how to import the metadata. You can import all of the endpoints, all of the bindings, or all of the contracts. You can import all of the endpoints associated with a specific WSDL service, binding, or port type. You can also import the endpoint for a specific WSDL port, the binding for a specific WSDL binding or the contract for a specific WSDL port type.

The WsdlImporter also exposes a KnownContracts property that allows you to specify a set of contracts that do not need to be imported. The WsdlImporter uses the contracts in the KnownContracts property instead of importing a contract with the same qualified name from the metadata.

Importing Policies

The WsdlImporter type collects the policy expressions attached to the message, operation, and endpoint policy subjects and then uses the IPolicyImportExtension implementations in the PolicyImportExtensions collection to import the policy expressions.

The policy import logic automatically handles policy references to policy expressions in the same WSDL document and is identified with a wsu:Id or xml:id attribute. The policy import logic protects applications against circular policy references by limiting the size of a policy expression to 4096 nodes, where a node is a one of the following elements: wsp:Policy, wsp:All, wsp:ExactlyOne, wsp:policyReference.

The policy import logic also automatically normalizes policy expressions. Nested policy expressions and the wsp:Optional attribute are not normalized. The amount of normalization processing done is limited to 4096 steps, where each step yields a policy assertion, or a child element of a wsp:ExactlyOne element.

The WsdlImporter type tries up to 32 combinations of policy alternatives attached to the different WSDL policy subjects. If no combination imports cleanly, the first combination is used to construct a partial custom binding.

Error Handling

Photos metadata export tool

Both the MetadataExporter and the MetadataImporter types expose an Errors property that can contain a collection of error and warning messages encountered during the export and import processes, respectively, that can be used when implementing tools.

The WsdlImporter type generally throws an exception for an exception caught during the import process and adds a corresponding error to its Errors property. The ImportAllContracts, ImportAllBindings, ImportAllEndpoints, and ImportEndpoints methods, however, do not throw these exceptions, so you must check the Errors property to determine if any issues occurred when calling these methods.

Photos Metadata Export Files

The WsdlExporter type rethrows any exceptions caught during the export process. These exceptions are not captured as errors in the Errors property. Once the WsdlExporter throws an exception, it is in a faulted state and cannot be reused. The WsdlExporter does add warnings to its Errors property when an operation cannot be exported because it uses wildcard actions and when duplicate binding names are encountered.

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In This Section

How to: Import Metadata into Service Endpoints
Describes how to import downloaded metadata into description objects.

How to: Export Metadata from Service Endpoints
Describes how to export description objects into metadata.

ServiceDescription and WSDL Reference
Describes the mapping between the description objects and WSDL.

How to: Use Svcutil.exe to Export Metadata from Compiled Service Code
Describes the use of Svcutil.exe to export metadata for services, contracts, and data types in compiled assemblies.

Data Contract Schema Reference
Describes the subset of the XML Schema (XSD) used by DataContractSerializer to describe common language run-time (CLR) types for XML serialization.


See also

You can edit batch of files through exporting/importing EXIF and IPTC data to XML, MS Excel, and CSV files. This method is helpful for changing tags that can’t be edited using the program interface.

Exif Pilot with Batch Editing Plug-in allow exporting EXIF and IPTC data from a batch of files to:

  • a corresponded number of files (or exporting the data of each to another file);
  • a single file (exporting data of all files to a single file).

To adjust this setting:

  1. Go to “Tools”->”Options”
  2. Click the “Settings” tab
  3. Activate the option “Export/Import to/from a single File”.

You can export all EXIF and IPTC tags or some of them selectively. Select “Tools”->”Options”->”Customize Export” and create a template with the tags you need to edit. You can save your templates for further editing in the future.

How to edit EXIF or IPTC tags in a number of files when the tags have the same value

Extract Metadata From Jpg

  1. Select “Tools”->”Options”->”Settings” and uncheck the “Export/Import to/from single File” option.
  2. Open the “Customize export” tab and choose the data you would like to export.
  3. Export the data from a single file to an MS Excel (XML or Text) file, for instance, by selecting “Import/Export”->”Export Exif/Iptc to MS Excel”.
  4. Open the MS Excel (XML or Text) file and edit values of the EXIF tags.
  5. Save your results and close the file.
  6. In Exif Pilot, select files for batch editing. It is handy to select files by moving the mouse while holding down the Shift key.
  7. Select “Import/Export”->”Import Exif/Iptc from MS Excel” to import the corrected EXIF data from the MS Excel (XML or Text) file into the selected image files.

How to edit EXIF or IPTC tags in a number of files when the tags have different values

  1. Select “Tools”->”Options”->”Settings” and check the “Export/Import to/from single File” option.
  2. Open the “Customize export” tab and choose the data you would like to export.
  3. Export the data from selected files to an MS Excel (XML or Text) file, for instance, by choosing “Import/Export”->”Export Exif/Iptc to MS Excel”.
  4. Open the MS Excel (XML or Text) file and edit the tags of each image.
  5. Import the corrected EXIF metadata from MS Excel (XML or Text) files into the original image files.

Keep The Date Images

To avoid undesirable change of metadata, please make backup copies of files before editing.

Photos Metadata Export Service

Note that the batch editing is available only with Batch Editing Plug-in…