protected void thanaSendMedicineDropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
int id = int.Parse(thanaSendMedicineDropDownList.SelectedValue);
centerSendMecinieDropDownList.DataSource = centerManager.CenterInThana(id);
centerSendMecinieDropDownList.DataTextField = "CenterName";
centerSendMecinieDropDownList.DataValueField = "Id";
centerSendMecinieDropDownList.DataBind();
}
