Hello,

If you use loading a data from the server you should know that in this case the sorting is on the server and not in the grid.

In this case you will need to make your server side code so that if the grid perform sort you should send the appropriate sorted data to the grid.

In case of loadonce = true you actually tell the grid to load data locally and in this case the grid sort the data automatically for you.

Some example you can see in our documentation site This is in PHP, but you will get a idea how to do this.

Kind Regards

Tony