Documentation:Upload/Download files and images in MDriven Turnkey

Upload files

To upload files into your Turnkey application you should add an attribute with type of Blob to your class in the model.

You can set it in the attribute properties area in MDriven Designer.

Set the attribute's type and BlobType in attribute proeprties.

MDriven Turnkey will render Blob as the upload button component. Text inside the button depends on your ViewColumn name. Don't forget to use <MyColumn>_FileName and <MyColumn>_ContentType to save your name and content type of the uploaded file (MDriven Turnkey will use this data to correctly create the download link for your Blob).

	Default upload button
	Readonly state of upload button (When readonly state is set – you're not able to upload the file)
	Uploaded state of upload button (When file is uploaded the upload button will turn to green color and show name of the uploaded file below)

Download files

To download file in MDriven Turnkey add your blob attribute into your ViewModel and set "isStatic" for the ViewModelColumn which contains your blob attribute. You still able to use TaggedValue "BlobDownloadLink" to create download link for your Blob.

	Default download file button

Upload images

To upload images into your Turnkey application you should add an attribute with type of Blob to your class in the MDriven Designer and set BlobType – "Image" in the attribute's properties area.

Set BlobType to "Image" in MDriven Designer

	Default image upload button
	Hover and click to upload image
	Image is uploaded (When image is uploaded it will replace the default fallback image inside the component)

You can use the readonly expression or "isStatic" checkbox in your ViewModel to present your image without the upload ability on it.

Considerations

If you have a viewmodel column with some kind of expression to reach the byte array that is the image - then Turnkey does not know if it is an image or a file. Just add the Eco.BlobType=Image tagged value to the ViewModel column.