IFileData Interface

Declares members implemented by the classes that can be represented in a UI using the FileDataPropertyEditor.

Namespace: DevExpress.Persistent.Base

Assembly: DevExpress.Persistent.Base.v22.1.dll

Declaration

C#

public interface IFileData

VB.NET

Public Interface IFileData

Related API Members

The following members return IFileData objects:

• CustomFileOperationEventArgs.FileData
• FileAttachmentsWindowsFormsModule.CreateFileData(IObjectSpace, IMemberInfo)

Related API Members

The following members return IFileData objects:

• CustomFileOperationEventArgs.FileData
• FileAttachmentsAspNetModule.CreateFileData(IObjectSpace, IMemberInfo)
• FileAttachmentsWindowsFormsModule.CreateFileData(IObjectSpace, IMemberInfo)

Remarks

You can create your own IFileData implementation when required. To see an example, refer to the FileData class sources at %PROGRAMFILES%\DevExpress 22.1\Components\Sources\DevExpress.Persistent\DevExpress.Persistent.BaseImpl.EFCore\FileData.cs, or to the following articles: How to: Store file attachments in the file system instead of the database | How to: Store file attachments in Dropbox instead of the database(video).

When the File Attachments module is added to the application, business object properties of the IFileData type are visualized using the FileDataPropertyEditor in WinForms and ASP.NET Web Forms applications.

WinForms:

ASP.NET Web Forms:

Note

If you want to access the full path to a file, implement the ISupportFullName interface in your class in addition to IFileData.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the IFileData interface.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

XAF_how-to-use-the-file-attachment-module-with-a-legacy-database-t237508/CS/CustomFileDataSolution.Module/BusinessObjects/InplaceFileData.cs#L16

[DomainComponent]
public class InplaceFileData : IFileData {
    private IXPSimpleObject host;

VB.NET

XAF_how-to-use-the-file-attachment-module-with-a-legacy-database-t237508/VB/CustomFileDataSolution.Module/BusinessObjects/InplaceFileData.vb#L18

Public Class InplaceFileData
    Implements IFileData
    Private host As IXPSimpleObject