void LoadTypeList()
{
VIPTypeInfoBll bll = new VIPTypeInfoBll();
ddlType.DataSource = bll.GetList();
ddlType.DisplayMember = "mtitle";
ddlType.ValueMember = "mid";
}
void Refresh()
{
dgvList.AutoGenerateColumns = false;
dgvList.DataSource = bll.GetList();
txtDiscount.Text = "";
txtTitle.Text = "";
txtId.Text = "添加时无编号";
btnSave.Text = "添加";
}