- C# List合并相同元素,对相同属性的列进行求和
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public class Student { public string? Name { get; set; } public string? Sex { get; set; } public int Score { get; set; }//成绩 public string? Course { get; set; }//课程 }
//数据源 List<Student> students = new List<Student> { new Student(){Name="刘一",Sex="男",Score=1 ,Course="语文"}, new Student(){Name="陈二",Sex="男",Score=1 ,Course="语文"}, new Student(){Name="张三",Sex="男",Score=1 ,Course="语文"}, new Student(){Name="张三",Sex="男",Score=1 ,Course="数学"},//重复行3 new Student(){Name="张三",Sex="男",Score=1 ,Course="音乐"},//重复行3 new Student(){Name="李四",Sex="男",Score=1 ,Course="语文"}, new Student(){Name="刘一",Sex="男",Score=1 ,Course="美术"},//重复行1 new Student(){Name="王五",Sex="男",Score=1 ,Course="语文"}, new Student(){Name="赵六",Sex="男",Score=1 ,Course="语文"}, new Student(){Name="张三",Sex="男",Score=1 ,Course="化学"}//重复行3 }; List<Student> result = new List<Student>(); while (students.Count > 0) { Student stu = students[0]; students.RemoveAt(0);//移除元素 List<Student> list = new List<Student>();//创建临时列表 foreach (var item in students) { if (item.Name.Equals(stu.Name)) { stu.Score += item.Score; stu.Course += " "+item.Course; } else { list.Add(item); } } students = list; result.Add(stu); } foreach (var item in result) { Console.WriteLine(item.Name +"丨"+item.Sex + "丨" + item.Score + "丨" + item.Course); }标签:Name,C#,元素,List,Sex,Course,Score,Student,new From: https://www.cnblogs.com/lxiamul/p/16938713.html