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 + "rn"; } 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 + "rn"; } 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 + "rn"; } 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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