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C#数组排序的两种常用方法

2019年07月18日  | 移动技术网IT编程  | 我要评论

本文实例讲述了c#数组排序的两种常用方法。分享给大家供大家参考。具体如下:

1.第一个例子

定义代码

#region array数组排序1
public class pigeon : icomparable<pigeon>
//类元素本身继承比较接口
{
int xvalue;
int yvalue;
public string batchno { get; set; }
public int compareto(pigeon other)
{
  if (other == null)
 throw new argumentnullexception("比较参数为空");
  //按第三个字符比较
  xvalue = convert.toint32(this.batchno.substring(2, 1));
  yvalue = convert.toint32(other.batchno.substring(2, 1));
  if (xvalue == yvalue)
  {
 return 0;
  }
  else if (xvalue < yvalue)
  {
 return -1;   //返回-1,x排在y的前面
  }
  else
  {
 return 1;    //返回1,x排在y的后面
  }
}
}
#endregion

测试代码

#region 测试array数组排序1
private void button3_click(object sender, eventargs e)
{
  pigeon[] pigeons = new pigeon[]{
 new pigeon(){batchno="1256"},
 new pigeon(){batchno="1236"},
 new pigeon(){batchno="1276"},
 new pigeon(){batchno="1216"}
  };
  array.sort(pigeons);
  string resultmsg = "";
  foreach (pigeon o in pigeons)
  {
 resultmsg += o.batchno + "\r\n";
  }
  messagebox.show(resultmsg);
}
#endregion

1.第二个例子

定义代码

#region array数组排序
public class mybatch   //数组元素类
{
public string batchno { get; set; }
}
public enum comparetype   //比较类型枚举
{
threechar =0,
fourchar=1
}
public class mybatchcompare:icomparer<mybatch>
//定义了一个比较类
{
private comparetype comparetype;//定义排序类型
public mybatchcompare(comparetype comparetype)
{
  //构造函数中初始化比较类型
  this.comparetype = comparetype;
}
public int compare(mybatch x, mybatch y)
{
  int xvalue;
  int yvalue;
  if (x == null) throw new argumentnullexception("x值为空");
  if (y == null) throw new argumentnullexception("y值为空");
  switch (comparetype)
  {          
 case comparetype.threechar:
   //按第三个字符比较从小到大排序
   xvalue = convert.toint32(x.batchno.substring(2,1));
   yvalue = convert.toint32(y.batchno.substring(2,1));
   if (xvalue == yvalue)
   {
 return 0;
   }
   else if (xvalue < yvalue)
   {
 return -1;   //返回-1,x排在y的前面
   }
   else
   {
 return 1;    //返回1,x排在y的后面
   }
 case comparetype.fourchar:
   //按第四个字符比较从小到大排序
   xvalue = convert.toint32(x.batchno.substring(3,1));
   yvalue = convert.toint32(y.batchno.substring(3,1));
   if (xvalue == yvalue)
   {
 return 0;
   }
   else if (xvalue < yvalue)
   {
 return -1;   //返回-1,x排在y的前面
   }
   else
   {
 return 1;    //返回1,x排在y的后面
   }
 default:
   throw new argumentexception("比较类型参数错误");
  }
}
}
#endregion

测试代码

#region array数组排序
private void button2_click(object sender, eventargs e)
{
  mybatch[] batchs ={
   new mybatch(){batchno="1234"},
   new mybatch(){batchno="1263"},
   new mybatch(){batchno="1218"},
   new mybatch(){batchno="1242"}
    };
  //按第三个字符从小到大排
  array.sort(batchs,new mybatchcompare(comparetype.threechar));
  string resultmsg = "";
  foreach (mybatch o in batchs)
  {
 resultmsg += o.batchno + "\r\n";
  }
  messagebox.show(resultmsg);
  //按第四个字符从小到大排序
  array.sort(batchs, new mybatchcompare(comparetype.fourchar));
  resultmsg = "";
  foreach (mybatch o in batchs)
  {
 resultmsg += o.batchno + "\r\n";
  }
  messagebox.show(resultmsg);
}
#endregion

希望本文所述对大家的c#程序设计有所帮助。

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