Question

I have a datagridview which is editable. I have a textbox below it. I am entering the values in the grid view on run time and calculating the total in the textbox below it. The problem is, whenever i change the value in the grid view, the textbox retains the previous value and adds the new value to previous. I dont want the old value to be added. I wrote this code

private void grdPurchase_CellEndEdit_1(object sender, DataGridViewCellEventArgs e)
{
   try
   {
        //this.grdPurchase.Refresh();
       (grdPurchase.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString() != "")
        string value = grdPurchase.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();

        if (e.ColumnIndex == 4)
        {

            float val = float.Parse(value);
            total = val;
            if (vapasi1 == "Yes")
            {
                if((e.r
                vtot += total;
                txt_forvapasitotal.Text = vtot.ToString();
                float vapsitot = float.Parse(txt_forvapasitotal.Text);
                float vapsicalculate = (vapsitot * a);
                float tax = vapsicalculate / 100;
                float with_vapasi = vtot + tax;
                txt_withvapasi.Text = Convert.ToString(with_vapasi);

            }
            else
            {
                nvtot += total;
                txt_withoutvapasitot.Text = nvtot.ToString();
            }
            txt_vapasiincludedtot.Text = (float.Parse(txt_withvapasi.Text) + float.Parse(txt_withoutvapasitot.Text)).ToString();
            }
        }

    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }
}

Answer 1

Try using the event DataGridView.CellValueChanged. An example can be find on MSDN. http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellvaluechanged