Как сравнить текущую дату с существующей датой базы данных в C#

<pre>
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);

        string userid = GVmydsr.DataKeys[e.RowIndex].Value.ToString();
        GridViewRow row = (GridViewRow)GVmydsr.Rows[e.RowIndex];

        //string date = GVmydsr.Rows[e.RowIndex].Cells[1].Text;
        Label date = (Label)row.FindControl("lblcurrentdate");
        
        

        GVmydsr.EditIndex = -1;

        DropDownList ddl1 = GVmydsr.Rows[e.RowIndex].FindControl("ddlclient") as DropDownList;
        TextBox txt1 = GVmydsr.Rows[e.RowIndex].FindControl("txtarea") as TextBox;
        TextBox txt2 = GVmydsr.Rows[e.RowIndex].FindControl("txtcmpnyname") as TextBox;
        TextBox txt3 = GVmydsr.Rows[e.RowIndex].FindControl("txtcname") as TextBox;
        TextBox txt4 = GVmydsr.Rows[e.RowIndex].FindControl("txtmobile") as TextBox;
        TextBox txt5 = GVmydsr.Rows[e.RowIndex].FindControl("txtemail") as TextBox;
        TextBox txt6 = GVmydsr.Rows[e.RowIndex].FindControl("txtaddr") as TextBox;
        TextBox txt7 = GVmydsr.Rows[e.RowIndex].FindControl("txtland") as TextBox;
        TextBox txt8 = GVmydsr.Rows[e.RowIndex].FindControl("txtpresence") as TextBox;
        DropDownList ddl2 = GVmydsr.Rows[e.RowIndex].FindControl("ddlstatus") as DropDownList;
        DropDownList ddl3 = GVmydsr.Rows[e.RowIndex].FindControl("ddlresult") as DropDownList;
        TextBox txt9 = GVmydsr.Rows[e.RowIndex].FindControl("txtcomment") as TextBox;

        string day = DateTime.Today.ToShortDateString().ToString();
        if (date.ToString() == day.ToString())
        {
            con.Open();
            SqlCommand cmd = new SqlCommand("update [dsr_data] set client_type='" + ddl1.Text + "' ,area='" + txt1.Text + "',company_name='" + txt2.Text + "',client_name='" + txt3.Text + "',mobile='" + txt4.Text + "',email='" + txt5.Text + "',address_name='" + txt6.Text + "',landmark='" + txt7.Text + "',curr_presence_appoint='" + txt8.Text + "',status_type='" + ddl2.Text + "', result='" + ddl3.Text + "', comment='" + txt9.Text + "' where id='" + userid + "'", con);
            cmd.ExecuteNonQuery();
            con.Close();

            gvbind();
        }
    }