I have 2 grids. Grid A and grid B. Grid B has a column with a dropdown list. Some of the items in the grid B dropdown list are from a column in grid A. Is there a way to update the dataSource, client side, of the dropdown list in grid B when a column in grid A is updated? All without posting back to the server. The dataSource for the dropdown list in grid B only seems to be available on an edit event of the grid B column containing the dropdown list. Is there a way to access the dataSource of the grid B dropdown list on an edit event of a grid A column? I'm using MVC and have my grids defined with Razor and my bond dropdown lists are in partial view editor templates.