转自:http://blog.csdn.net/dinglang_2009/article/details/6951138
昨日在工作中,遇到一个问题:需要将查询出来的DataTable数据源,转换成List<T>的泛型集合(已知T类型)。第一反应,我想肯定要用到“泛型”(这不是废话吗?都说了要转换成List<T>泛型集合了),而且还要用到“反射”相关的。呵呵。很快,我就做出了一个小实例,测试通过。下面我将代码贴出来,分享给大家。代码都有详细的注释,读者朋友可以很清晰的看懂我的思路。
首先,这是我写的一个通用转换类,完成此类操作。也是实现这个功能最核心的部分:
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.Data;
- using System.Collections;
- using System.Reflection;
- namespace DatableToList
- {
- class ConvertHelper<T> where T : new()
- {
-
-
-
-
-
- public static List<T> ConvertToList(DataTable dt)
- {
-
-
- List<T> ts = new List<T>();
-
-
- Type type = typeof(T);
-
- string tempName = string.Empty;
-
- foreach (DataRow dr in dt.Rows)
- {
- T t = new T();
-
- PropertyInfo[] propertys = t.GetType().GetProperties();
-
- foreach (PropertyInfo pi in propertys)
- {
- tempName = pi.Name;
-
- if (dt.Columns.Contains(tempName))
- {
-
- if (!pi.CanWrite) continue;
-
- object value = dr[tempName];
-
- if (value != DBNull.Value)
- pi.SetValue(t, value, null);
- }
- }
-
- ts.Add(t);
- }
-
- return ts;
-
- }
- }
- }
下面,是Main方法中调用的实例:
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.Data;
- using System.Collections;
- using System.Reflection;
-
-
- namespace DatableToList
- {
- class Program
- {
- static void Main(string[] args)
- {
- DataTable dt = CreateDt();
-
- List<Person> list = ConvertHelper<Person>.ConvertToList(dt);
-
- foreach (var item in list)
- {
- Console.WriteLine(item.ToString());
- }
-
- Console.ReadKey();
- }
-
-
-
-
- public static DataTable CreateDt()
- {
-
- DataTable dt = new DataTable();
- dt.Columns.Add(new DataColumn("id", typeof(System.Int32)));
- dt.Columns.Add(new DataColumn("name", typeof(System.String)));
- dt.Columns.Add(new DataColumn("address", typeof(System.String)));
-
- dt.Rows.Add(1,"Dylan","SZ");
- dt.Rows.Add(2, "Jay", "TW");
- dt.Rows.Add(3, "CQ", "HK");
- return dt;
- }
-
- }
-
- }
最下面,就是自定义的一个简单类的代码了:
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
-
- namespace DatableToList
- {
- class Person
- {
- private int id;
-
- public int Id
- {
- get { return id; }
- set { id = value; }
- }
- private string name;
-
- public string Name
- {
- get { return name; }
- set { name = value; }
- }
- private string address;
-
- public string Address
- {
- get { return address; }
- set { address = value; }
- }
-
- public override string ToString()
- {
- return "Person: " + id + " ," + name+","+address;
- }
- }
- }
如何将DataTable转换成List<T>呢?
原文:http://www.cnblogs.com/nearpengju123/p/3978902.html