版权声明:个人速查笔记 https://blog.csdn.net/qq_33981438/article/details/82663255
DataTable 通过 DataView.RowFilter 筛选条件
DataTable dt = set.Tables[0];
DataView dv = dt.DefaultView;
dv.RowFilter = "退货编号='2222afaz'";
return dv.ToTable();