I need and advise.

I want to make a page that create movtos (using webgrid) that affect the material inventory of my comany.

I need to control that the material inventory does not allow negative values.

When I write the quantity of the movto (beforeexiteditmode event), I need to make an assincronicall postback to validate the
material inventory, and then return true or false if the inventory become negative.

If I make an assincronicall postback I don't want to fire the Updaterowbatch event until the usser press the save button