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View this topic on docs.devexpress.com (Learn more)

FileAttachmentAttribute Class

Applied to business classes that expose a property of the IFileData type. Activates Controllers that manage file attachments for the target business class. Specifies a property that stores a file attachment.

Namespace:DevExpress.Persistent.Base
Assembly:DevExpress.Persistent.Base.v19.1.dll

Expanded Syntax

Expanded Remarks

Use this attribute to activate the following Controllers that provide Actions to manage file attachments:

The FileAttachmentAttribute attribute takes a single parameter - the FileDataPropertyName. The parameter specifies the property of a IFileData type to be used by the Controllers listed above. The snippet below illustrate the FileAttachmentAttribute attribute usage.

As an alternative to using the FileAttachmentAttribute, you can inherit from the FileAttachmentBase class. It has the FileAttachmentAttribute applied, and exposes the File property to store file attachments.

Note

It is not recommended to use the DataView mode with the FileAttachmentAttribute. In this mode, a separate request to database is made for each focused List View record.

Expanded Inheritance Hierarchy

System.Object
    System.Attribute
       FileAttachmentAttribute

Expanded See Also

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