Customization of DataGrid in C#

Question

I am trying to Customize the DataGrid. I have a query which returns the fields CustomerName, Designation, AprvAmt, AprvFlg. I only bind first three columns to the Grid. I have to change the cell color of 'AprvAmt' by checking the AprvFlg. But AprvFlg will not going to bind to the Grid. I have searched in C# Corner and find some results, one is 'Unitprice' which bound to the grid. Any kind of help please, thanks in advance.