DataTable对象系列化后可以用Linq获取值方法

//类
public class User
{
public int ID { get; set; }
public string Name { get; set; }
}
//对象转换
private static List<T> TableToEntity<T>(DataTable dt) where T : class,new()
{
Type type = typeof(T);
List<T> list = new List<T>();

foreach (DataRow row in dt.Rows)
{
PropertyInfo[] pArray = type.GetProperties();
T entity = new T();
foreach (PropertyInfo p in pArray)
{
if (row[p.Name] is Int64)
{
p.SetValue(entity, Convert.ToInt32(row[p.Name]), null);
continue;
}
p.SetValue(entity, row[p.Name], null);
}
list.Add(entity);
}
return list;
}

// 调用:
List<User> userList = TableToEntity<User>(YourDataTable);

--获取table内的一字段值
int count1=dtOrderDetails.AsEnumerable().Where(t => t.Field<string>("SKU").Substring(0, 2) == "MH" || t.Field<string>("SKU").Substring(0, 2) == "MK").Count()
int count2=dtOrderDetails.AsEnumerable().Where(e => e.Field<decimal>("UnitPrice") == 0 || e.Field<decimal>("SalesPrice") == 0).Count()
int count3=dtOrderDetails.AsEnumerable().Where(e => e.Field<int>("BType") == 1 && e.Field<string>("BValue") == MemberID.ToString()).Count()