Hi Dave,
We are not clear in your query. We assume that you would like to edit all rows at a time until the save button is pressed.
Attached is the sample in which all the row template are iterate upon the postback.
http://websamples.syncfusion.com/samples/Grid.Web/4.4.0.51/F59448/GridGroup_Forum59448/main.htmIn our attached sample, while saving the record it iterates through all Input control to find the updated value.
Let us know if our sample helps.
Thanks for using Syncfusion products.
Regards,
Gokulkumar B