DataTable对象系列化后可以用Linq获取值方法

系统化后可以用linq，不用循环语句，要方便很多，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()