advanced grid is having rows and columns. We have datachange event of a row. But on clicking a particular cell, can we pass that cell's value ??
Which version of ThingWorx are you running? Are you referring to the selected row? If so, you should be able to grab the data for passing to another service, etc. Check this page in the Help Center for the SelectedRows property.
You can select just the desired property as long as you've defined the data shape. Is the data shape known or is it dynamic?