C# · 12月 28, 2021

C#数组排序的两种常用方法

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

测试代码

#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”; } Message@R_243_2419@.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,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”; } Message@R_243_2419@.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”; } Message@R_243_2419@.Show(ResultMsg);}#endregion

希望本文所述对大家的C#程序设计有所帮助。