how to set gridview Cell back ground color in asp.net

Question

I have 20 rows and 10 column data in Gridview.
I have to set particular cell back ground color Gray like [1 row][1 col],[3 row][1 col].
I have written this line of

code.grdsellthru.Rows[3].BackColor = System.Drawing.Color.Gray;  

but color is applying total row.
I need to apply only 3 rd row 1 column.

Answer 1

color is applying total row.I need to apply only 3 rd row 1 column

You need to specify Cell along with the Row like:

grdsellthru.Rows[3].Cells[1].BackColor = System.Drawing.Color.Gray;