List<T>泛型数组API自带的Sort() 排序方法根据自定义排序实现

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.Reflection;

namespace BLL
{
public class OrderHelper
{
}
/// <summary>
/// 继承IComparer<T>接口，实现同一自定义类型　对象比较
/// </summary>
/// <typeparam >T为泛用类型</typeparam>
public class Reverser<T> : IComparer<T>
{
private Type type = null;
private ReverserInfo info;

/**/
/// <summary>
/// 构造函数
/// </summary>
/// <param >进行比较的类类型</param>
/// <param >进行比较对象的属性名称</param>
/// <param >比较方向(升序/降序)</param>
public Reverser(Type type, string name, ReverserInfo.Direction direction)
{
this.type = type;
this.info.name = name;
if (direction != ReverserInfo.Direction.ASC)
this.info.direction = direction;
}

/**/
/// <summary>
/// 构造函数
/// </summary>
/// <param >进行比较的类名称</param>
/// <param >进行比较对象的属性名称</param>
/// <param >比较方向(升序/降序)</param>
public Reverser(string className, string name, ReverserInfo.Direction direction)
{
try
{
this.type = Type.GetType(className, true);
this.info.name = name;
this.info.direction = direction;
}
catch (Exception e)
{
throw new Exception(e.Message);
}
}

/// <summary>
/// 构造函数
/// </summary>
/// <param >进行比较的类型的实例</param>
/// <param >进行比较对象的属性名称</param>
/// <param >比较方向(升序/降序)</param>
public Reverser(T t, string name, ReverserInfo.Direction direction)
{
this.type = t.GetType();
this.info.name = name;
this.info.direction = direction;
}

//必须！实现IComparer<T>的比较方法。
int IComparer<T>.Compare(T t1, T t2)
{
object x = this.type.InvokeMember(this.info.name, BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty, null, t1, null);
object y = this.type.InvokeMember(this.info.name, BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty, null, t2, null);
if (this.info.direction != ReverserInfo.Direction.ASC)
Swap(ref x, ref y);
return (new CaseInsensitiveComparer()).Compare(x, y);
}

//交换操作数
private void Swap(ref object x, ref object y)
{
object temp = null;
temp = x;
x = y;
y = temp;
}
}

/// <summary>
/// 对象比较时使用的信息类
/// </summary>
public struct ReverserInfo
{
/// <summary>
/// 比较的方向，如下：
/// ASC：升序
/// DESC：降序
/// </summary>
public enum Direction
{
ASC = 0,
DESC,
};

public enum Target
{
CUSTOMER = 0,
FORM,
FIELD,
SERVER,
};

public string name;
public Direction direction;
public Target target;
}
}

(二)应用sort()方法:

AgreementSheet abc = new AgreementSheet(); //new 一个当前处理的类
Reverser<AgreementSheet> reverser = new Reverser<AgreementSheet>(abc.GetType(), "Customer Name in GSX", ReverserInfo.Direction.DESC);
//"Customer Name in GSX":指定我们List<>泛型 类中一个要排序的列

list.Sort(reverser); //即已经完成自定义排序了

希望能帮助大家,谢谢!