how to get columns values of datagridview at run time

may be below code cn help u.

for (int i=0;i<datagridview1.rows.count;i++)>
{
double price =5.0;
double totalamt= Convert.ToDouble(DataGridView1.Rows[i].Cells["qty"].Value.ToString()) * (price);
DataGridView1.Rows[i].Cells["qty"].Value = totalamt;
}


i hope this code will help u achieve ur task
Enjoy :)

how can i perform calculations on values in datagrid any idea?
or any other way of doing this

Hi Linga Raja you can use below code for your problem,I think it will be solve your problems. if you have any query fill free to reply
Thanks
Vivek

int myDatarow = 0;
            double amt = 0;
          myDatarow=  dGNew.Rows.Count;// here dG isData Grid
          for (int i = 0; i < myDatarow; i++)
          {
              amt = amt + Convert.ToDouble(dGNew.Rows[i].Cells[3].Value.ToString());// here cells[3] is cell no you can use cell name/ID like  dGNew.Rows[i].Cells["amount"].Value.ToString()
          }
          lbltotalAmount.text = amt.ToString();

vivek but i want to show the calculated value back in the datagridview

papername qty amount these are three columns in datagridview

user will enter qty and amount has to be calculated by retrieving value frm database
and shown in amount column
and thanx vivek for ur idea