we are using WebGrid 7 in SharePoint web part where we are programatically rendering the web grid.

We have made inline editing enabled for few columns. Using updaterow i can figure out that which row was modified by user but how do i figure out that whether a cell value was modified by user ?

I know on initializerow even i get cell's oldValue and Value , oldText and Text but when on click of some button i try to access cell value for a perticular row the oldValu or oldText is always null   !!!!

two questions in nutshell

1) What is the basic different between oldText and oldValue, when to use what

2) How do i get old value of a cell not on intitializerow event but on some server control like button's click event wher at one shot i get alll the modified cell's value ?

Looking forward for some help.

Thanks.