C#数组排序的两种常用方法

#region Array数组排序1public 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

#region 测试Array数组排序1private 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

#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

#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