IMPORTFILE Function (MediaSet)

Artikel
06/05/2016

Adds a media, such as a JPEG image, to the MediaSet data type field of a record for displaying the media in the client. The media is imported to the database and included in a MediaSet for the record.

Syntax

[Guid := ]Record.MediaSetField.IMPORTFILE(FileName, Description[, MimeType])

Parameters

Record
Type: Record

Specifies the record that you want to add the media to.

MediaSetField
Type: MediaSet

Specifies the field that you want to add the media to. The field must have the MediaSet data type.

FileName
Type: Text

Specifies the full path and name of the media file to be imported.

Description
Type: Text

Specifies text that can be used in the client to describe the media.

MimeType
Type: Text

Specifies the media content type. MIME type is used by browsers, and is an Internet standard to describe the contents of a file. The MimeType value must be a two-part string that consists of a type and subtype, such as image/jpeg or image/gif. For more information, see Supported Media Types.

If this parameter is not specified, the function will deduce the MIME type from the file extension. For example the MIME type for a .jpg file is image/jpeg.

Property Value/Return Value

Type: GUID

Specifies the unique ID that is assigned to the MediaSet of the record. You can also get this ID by using the MEDIAID Function (MediaSet).

Remarks

You use this function to upload a media file as part of a collection of media objects that you want to associate with a record. The function is similar to the IMPORTFILE Function (Media) except that this function enables you to import multiple media files for the same record. For example, you can add multiple images for an item in table 27 Item.

When a media file is imported, a media object is created and stored in the system table 2000000181 Tenant Media of the application database. The media object is assigned a unique identifier (GUID).

In addition, the media object is assigned to a MediaSet which also has a specific GUID. This GUID is included in the MediaSet data type field as a reference to the media objects. The MediaSet and its GUID are created with the first media that is imported, and the information is stored in table 2000000183 Tenant Media Set. All additional media objects for the record are then associated with the same MediaSet GUID.

Example

This example uses the IMPORTFILE function to add images to records in table 27 Item of the CRONUS demonstration database.

In support of the example code, you must also complete these tasks:

Create two sample image files that you want to use on item no. 1000 in table 27 Item.

Save the images as JPEG type, and give them the names 1000-v1.jpg and 1000-v2.jpg. Save the files in the C:\images folder on the computer that is running Microsoft Dynamics NAV Server instance.
Verify that table 27 Item has a field that is called Picture and has the data type MediaSet.

This is field on which you will add the images. If the field is not present, then add it.

With these tasks in place, you can add the following C/AL code for importing the images. For this code example, create a codeunit, and add the code to the OnRun trigger.

The code requires that you create the following variables and text constant:

Variable name	DataType	Subtype
itemRec	Record	Item
count	Integer
mediasetId	GUID

Text constant name	ConstValue
Text000	The files have been imported. Item %1 has %2 pictures in MediaSet: %3

itemRec.GET('1000');
itemRec.Picture.IMPORTFILE('C:\images\1000-v1.jpg', 'Demo image for item ' + FORMAT(itemRec."No."));
itemRec.Picture.IMPORTFILE('C:\images\1000-v2.jpg', 'Demo image for item ' + FORMAT(itemRec."No."));
count := (itemRec.Picture.COUNT);
mediasetId := itemRec.Picture.MEDIAID;  
MESSAGE(Text000,itemRec."No.", count, mediasetId);

If you run system table 2000000181 Tenant Media from the development environment, you should see the new images in the list.

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