forgive me if i am asking silly question
but i can't figure it out what is wrong
In save button, i update datatables to database
{
new SqlCommandBuilder(sa);
sa.Update(dtPurchaseProductExp);
new SqlCommandBuilder(sa1);
sa1.Update(dtPurchaseProduct);
}
i don't have 'Unit' columns in dtPurchaseProductExp but
the following error shows up
![enter image description here][1]
![these are data columns of PurcaseProduct][2]
![these are data columns of PurcaseProductExp][3]
[1]: http://i.stack.imgur.com/u6mvu.jpg
[2]: http://i.stack.imgur.com/TU7ML.jpg
[3]: http://i.stack.imgur.com/eYzeS.jpg