Try Aspose.Slides Metadata online app to see how to work with document properties via Aspose.Slides API:
About Presentation Properties
As we have described earlier that Aspose.Slides for Python via .NET supports two kinds of document properties, which are Built-in and Custom properties. So, developers can access both kinds of properties with the use of Aspose.Slides for Python via .NET API. Aspose.Slides for Python via .NET provides a class IDocumentProperties that represents the document properties associated with a presentation file through Presentation.document_properties property. Developers can use IDocumentProperties property exposed by Presentation object to access the document properties of the presentation files as described below:
Manage Presentation Properties
Microsoft PowerPoint provides a feature to add some properties to the presentation files. These document properties allow some useful information to be stored along with the documents (presentation files). There are two kinds of document properties as follows
- System Defined (Built-in) Properties
- User Defined (Custom) Properties
Built-in properties contain general information about the document like document title, author’s name, document statistics and so on. Custom properties are those ones, which are defined by the users as Name/Value pairs, where both name and value are defined by the user. Using Aspose.Slides for Python via .NET, developers can access and modify the values of built-in properties as well as custom properties. Microsoft PowerPoint 2007 allows managing the document properties of the presentation files. All you have to do is to click the Office icon and further Prepare | Properties | Advanced Properties menu item of the Microsoft PowerPoint 2007. After you select Advanced Properties menu item, a dialog would appear allowing you to manage the document properties of the PowerPoint file. In the Properties Dialog, you can see that there are many tab pages like General, Summary, Statistics, Contents and Custom. All these tab pages allow configuring different kinds of information related to the PowerPoint files. Custom tab is used to manage the custom properties of the PowerPoint files.
Access Built-in Properties
These properties as exposed by IDocumentProperties object include: Creator(Author), Description, Keywords Created (Creation Date), Modified Modification Date, Printed Last Print Date, LastModifiedBy, Keywords, SharedDoc (Is shared between different producers?), PresentationFormat, Subject and Title
import aspose.slides as slides # Instantiate the Presentation class that represents the presentation with slides.Presentation(path + "AccessBuiltin Properties.pptx") as pres: # Create a reference to object associated with Presentation documentProperties = pres.document_properties # Display the builtin properties print("category : " + documentProperties.category) print("Current Status : " + documentProperties.content_status) print("Creation Date : " + str(documentProperties.created_time)) print("Author : " + documentProperties.author) print("Description : " + documentProperties.comments) print("KeyWords : " + documentProperties.keywords) print("Last Modified By : " + documentProperties.last_saved_by) print("Supervisor : " + documentProperties.manager) print("Modified Date : " + str(documentProperties.last_saved_time)) print("Presentation Format : " + documentProperties.presentation_format) print("Last Print Date : " + str(documentProperties.last_printed)) print("Is Shared between producers : " + str(documentProperties.shared_doc)) print("Subject : " + documentProperties.subject) print("Title : " + documentProperties.title)
Modify Built-in Properties
Modifying the built-in properties of presentation files is as easy as that of accessing them. You can simply assign a string value to any desired property and the property value would be modified. In the example given below, we have demonstrated that how we can modify the built-in document properties of the presentation file.
import aspose.slides as slides # Instantiate the Presentation class that represents the Presentation with slides.Presentation(path + "ModifyBuiltinProperties.pptx") as presentation: # Create a reference to object associated with Presentation documentProperties = presentation.document_properties # Set the builtin properties documentProperties.author = "Aspose.Slides for .NET" documentProperties.title = "Modifying Presentation Properties" documentProperties.subject = "Aspose Subject" documentProperties.comments = "Aspose Description" documentProperties.manager = "Aspose Manager" # save your presentation to a file presentation.save("DocumentProperties_out.pptx", slides.export.SaveFormat.PPTX)
Add Custom Presentation Properties
Aspose.Slides for Python via .NET also allows developers to add the custom the values for presentation Document properties. An example is given below that shows how to set the custom properties for a presentation.
import aspose.slides as slides # Instantiate the Presentation class with slides.Presentation() as presentation: # Getting Document Properties documentProperties = presentation.document_properties # Adding Custom properties documentProperties.set_custom_property_value("New Custom", 12) documentProperties.set_custom_property_value("My Nam", "Mudassir") documentProperties.set_custom_property_value("Custom", 124) # Getting property name at particular index getPropertyName = documentProperties.get_custom_property_name(2) # Removing selected property documentProperties.remove_custom_property(getPropertyName) # Saving presentation presentation.save("CustomDocumentProperties_out.pptx", slides.export.SaveFormat.PPTX)
Access and Modify Custom Properties
Aspose.Slides for Python via .NET also allows developers to access the values of custom properties. An example is given below that shows how can you access and modify all of these custom properties for a presentation.
import aspose.slides as slides # Instanciate the Presentation class that represents the PPTX with slides.Presentation(path + "AccessModifyingProperties.pptx") as presentation: # Create a reference to document_properties object associated with Prsentation documentProperties = presentation.document_properties # Access and modify custom properties for i in range(documentProperties.count_of_custom_properties): # Display names and values of custom properties print("Custom Property Name : " + documentProperties.get_custom_property_name(i)) print("Custom Property Value : " + documentProperties.get_custom_property_value[documentProperties.get_custom_property_name(i)]) # Modify values of custom properties documentProperties.set_custom_property_value(documentProperties.get_custom_property_name(i), "New Value " + str(i + 1)) # save your presentation to a file presentation.save("CustomDemoModified_out.pptx", slides.export.SaveFormat.PPTX)
Check if Presentation is Modified or Created
Aspose.Slides for Python via .NET provides a facility to check if a presentation is modified or created. An example is given below that shows how to check if the presentation is created or modified.
import aspose.slides as slides info =slides.PresentationFactory.instance.get_presentation_info(path + "AccessModifyingProperties.pptx") props = info.read_document_properties() print(props.name_of_application) print(props.app_version)