Make ASP.Net GridView BoundField font as bold in C#

Dear Sir,

Please help me to make GridView cell font as bold.

protected void GridView1_RowDataBound(object sender, System.Web.UI.WebControls.GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        SqlConnection con = new SqlConnection(@"Data Source=10.1.246.4;Initial Catalog=OCMS;User ID=dba_ntpc_meja_intranet;Password=alpha$890;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False");
        DropDownList DropDownList1 = (e.Row.FindControl("DropDownList1") as DropDownList);
        SqlCommand cmd = new SqlCommand("select * from complaint_status", con);
        SqlDataAdapter sda = new SqlDataAdapter(cmd);
        DataTable dt = new DataTable();
        sda.Fill(dt);
        DropDownList1.DataSource = dt;
        DropDownList1.DataTextField = "STATUS_NAME";
        DropDownList1.DataValueField = "STATUS_NAME";
        DropDownList1.DataBind();
        DropDownList1.Items.Insert(0, new ListItem("-Select Status-", "0"));


        DropDownList DropDownList2 = (e.Row.FindControl("DropDownList2") as DropDownList);
        cmd = new SqlCommand("select * from Assign_to", con);
        sda = new SqlDataAdapter(cmd);
        dt = new DataTable();
        sda.Fill(dt);
        DropDownList2.DataSource = dt;
        DropDownList2.DataTextField = "STATUS_NAME";
        DropDownList2.DataValueField = "STATUS_NAME";
        DropDownList2.DataBind();
        DropDownList2.Items.Insert(0, new ListItem("-Select Name-", "0"));

    }
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        DataRowView dr = (DataRowView)e.Row.DataItem;
        HtmlImage img = e.Row.FindControl("Image1") as HtmlImage;
        if (!Convert.IsDBNull(dr["Image"]))
        {
            (e.Row.FindControl("Image1") as HtmlImage).Src = dr["Image"].ToString();
        }
        else
        {
            img.Visible = false;
        }

        if (e.Row.RowType == DataControlRowType.DataRow && e.Row.RowIndex != GridView1.EditIndex)
        {
            DateTime time = Convert.ToDateTime((e.Row.FindControl("lblDate") as Label).Text);
            if (DateTime.Today.Subtract(time).TotalHours < 3)
            {
                (e.Row.FindControl("lblDate") as Label).ForeColor = Color.Black;
            }
            else if (DateTime.Today.Subtract(time).TotalHours > 3)
            {
                (e.Row.FindControl("lblDate") as Label).ForeColor = Color.Red;
            }
            (e.Row.FindControl("lblintrcm") as Label).ForeColor = Color.Blue;
            string[] stringSeparators = new string[] { "\r\n" };
            string[] texts = e.Row.Cells[0].Text.Split(stringSeparators, StringSplitOptions.None);
            if (texts.Length > 7)
            {
                e.Row.Cells[7].Text = string.Format("<b>{0}</b>", texts[0].Trim(), texts[7].Trim());
            }
            else
            {
                e.Row.Cells[7].Text = string.Format("<b>{0}</b>", texts[0].Trim());
            }
        }
    }
}