private void setCombo(string sql, CheckedComboBoxWithLable cmb)
{
//清空下拉列表
cmb.ClearItem();
//cmb.Items.Add("%");
//cmb.Text = "%";
//实例化一个类
getLxerpConn v = new getLxerpConn();
//获取类里面的sql连接到数据库的字符串
v.getsqlconn();
// string connStr = "Data Source=.\\sql2008;Initial Catalog=books;Integrated Security=True"; //连接到数据库的字符串
SqlConnection cn = new SqlConnection(v.Sqlconn);
//打开链接
cn.Open();
SqlCommand cmd = cn.CreateCommand();
cmd.CommandText = sql;
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
cmb.Add_CB_Item(dr.GetValue(0).ToString().Trim());
}
cn.Close();
cn.Dispose();
}