C#

<br />
 foreach (DataGridViewCell cell in dgvPedidoItem.Rows[e.RowIndex].Cells)<br />
            {<br />
                cell.Style.BackColor = System.Drawing.SystemColors.Info;<br />
            }<br />

...
namespace Bonuss
{
    public partial class frmList : Form
    {
        public frmList()
        {
            InitializeComponent();
            dataGridView1.CellClick += new DataGridViewCellEventHandler(dataGridView1_CellClick);
        }
        void frmList__myElapsed(object sender, long Ticks, DataGridViewRow row)
        {
            if (dataGridView1.Rows[row.Index].Tag != null)
            {
                dataGridView1[7, row.Index].Value = Ticks.ToString();
            }
        }
        private void ReloadData()
        {
            for (int i = 0; i <= dataGridView1.Rows.Count-1; i++)
            {
                if (dataGridView1.Rows[i].Tag == null)
                {
                    dataGridView1.Rows[i].Tag = new rowTag(dataGridView1.Rows[i]);
                    ((rowTag)dataGridView1.Rows[i].Tag)._myElapsed += new rowTag.myElapsed(frmList__myElapsed);
                }
                else
                {
                    int err = 0;
                }
            }
        }
        DataGridViewButtonColumn buttons;
        private void AddButtonColumn()
        {
            buttons = new DataGridViewButtonColumn();
            {
                buttons.HeaderText = "Opcijas";
                buttons.Text = "--";
                buttons.UseColumnTextForButtonValue = false;
                buttons.AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
                buttons.FlatStyle = FlatStyle.Standard;
                buttons.CellTemplate.Style.BackColor = Color.Honeydew;
                buttons.DisplayIndex = 8;
                buttons.DefaultCellStyle.NullValue = "<+/->";
            }
            dataGridView1.Columns.Add(buttons);
        }
        public void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {

            if (dataGridView1.Columns[e.ColumnIndex].HeaderText=="Opcijas" )
            {
                
                try
                {
                    rowTag currentRowTag = ((rowTag)dataGridView1.Rows[e.RowIndex].Tag);
                    if (!currentRowTag.isRunning)
                    {
                        currentRowTag.Start();
                    }
                    else
                    {
                        currentRowTag.Finish();
                    }
                }
                catch (Exception)
                {
                    int a = 0;
                }
                try
                {
                    if (dataGridView1[7, e.RowIndex].Value == "X")
                    {
                        if (e.ColumnIndex == buttons.Index)
                        {
                            //MessageBox.Show("" + dataGridView1[7, e.RowIndex].Value);
                            dataGridView1[7, e.RowIndex].Value = 0;
                        }
                    }
                    else if (dataGridView1[7, e.RowIndex].Value != "X" )
                    {
                        if (e.ColumnIndex == buttons.Index)
                        {
                            dataGridView1[7, e.RowIndex].Value = "X";
                            float ft_Counter = 0;

                            try
                            {
                                ft_Counter = Convert.ToSingle(dataGridView1[9, e.RowIndex].Value);
                            }
                            catch (Exception)
                            {
                                ft_Counter = 0;
                            }

                            dataGridView1[9, e.RowIndex].Value = ft_Counter + 1;
                        }

                    }
                }
...