DocumentProperties Class

Reference

Definition

Namespace:: Windows.Storage.FileProperties

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Edit

Provides access to the document-related properties of an item (like a file or folder).

public ref class DocumentProperties sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
class DocumentProperties final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
public sealed class DocumentProperties

Public NotInheritable Class DocumentProperties

Inheritance: Object Platform::Object IInspectable DocumentProperties

Attributes: ContractVersionAttribute

Implements: IStorageItemExtraProperties

Windows requirements

Device family	Windows 10 (introduced in 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v1.0)

Examples

This example demonstrates how to use a file query that is backed by the system index to retrieve document properties like Title.

try
{
    // Create index backed file query and get results
    List<string> fileTypeFilter = new List<string>();
    fileTypeFilter.Add(".docx");
    QueryOptions queryOptions = new QueryOptions(Windows.Storage.Search.CommonFileQuery.OrderByName, fileTypeFilter);
    queryOptions.IndexerOption = IndexerOption.OnlyUseIndexer;
    StorageFileQueryResult queryResult = Windows.Storage.KnownFolders.DocumentsLibrary.CreateFileQueryWithOptions(queryOptions);
    var files = await queryResult.GetFilesAsync();

    // Process resulting files
    if (files.Count == 0)
    {
        // Perform tasks to handle no files found
    }
    else
    {
        // Access properties for each file
        foreach (StorageFile file in files)
        {
            var documentProperties = await file.Properties.GetDocumentPropertiesAsync();
            // Perform tasks with document properties
            String title = documentProperties.Title;
        }
    }
}
// Handle errors with catch blocks
catch (FileNotFoundException)
{
 // For example, handle a file not found error
}

While the example uses the DocumentsLibrary to create the query, you can create a query like this for any folder you have access to that you can get as a StorageFolder.

In the example, file contains a StorageFile that represents the file to retrieve properties for.

Remarks

You can access a DocumentProperties object asynchronously using the GetDocumentPropertiesAsync method from the Properties property of an item (like a file of folder), or synchronously using the DocumentProperties property if it is available. You can get a DocumentProperties object using any of the following methods and properties:

FileInformation.documentProperties property
FolderInformation.documentProperties property
StorageItemContentProperties.getDocumentPropertiesAsync method, which can be accessed using the Properties property, if it is available.

Note

Properties that are get or set using a property handler that is defined by another app (like Microsoft Word) may not be accessible. Instead, you can try to get these properties using a file query that is backed by the system index. For more information, see QueryOptions.

For more code samples about accessing properties, see the File access sample.

Properties

Author	Gets the collection of the document's authors.
Comment	Gets or sets the comments associated with the document.
Keywords	Gets the collection of keywords associated with the document.
Title	Gets or sets the title of the document.

Methods

RetrievePropertiesAsync(IIterable<String>)	Retrieves the specified properties associated with the item.
SavePropertiesAsync()	Saves all properties associated with the item.
SavePropertiesAsync(IIterable<KeyValuePair<String,Object>>)	Saves the specified properties and values associated with the item.

Applies to

Delen via