Greeting from Syncfusion support.
We have analyzed your reported query on referring image in EJ2 TreeView which is stored in an MS SQL database as a data type image.
For your information, In EJ2 TreeView component, we have to refer the image URL directly or need to set the base64 as src tag for referring an image in a node.
Currently, EJ2 TreeView will not support any other formats for referring image. In your case, you can convert the bytesArray into base64 using valid online convertor. After that, you can refer the base64 value in src tag of image.
To know about the image for TreeView. Refer the below links.
Please, let us know If you face any issue while using base64 and image in TreeView component, we are happy to assistance on this regard.
Shameer Ali Baig S.