自定义类:
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace CSharp中Dictionary排序方式 { [Serializable] public class CustmonizedClass { public string stuName { get ; set ; } public int stuAge { get ; set ; } public string stuSex { get ; set ; } public double stuScore { get ; set ; } } } |
Dictionary<int,自定义类>
按照Dictionary的Key值 升序排序(OrderBy)、降序排序(OrderByDescending):
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace CSharp中Dictionary排序方式 { public class Program { static void Main( string [] args) { CustmonizedClass cn1 = new CustmonizedClass(); cn1.stuName = "张三" ; cn1.stuAge = 18; cn1.stuSex = "男" ; cn1.stuScore = 89.5; CustmonizedClass cn2 = new CustmonizedClass(); cn2.stuName = "李四" ; cn2.stuAge = 19; cn2.stuSex = "男" ; cn2.stuScore = 88.5; CustmonizedClass cn3 = new CustmonizedClass(); cn3.stuName = "王五" ; cn3.stuAge = 17; cn3.stuSex = "女" ; cn3.stuScore = 89.5; Dictionary< int , CustmonizedClass> dic1 = new Dictionary< int , CustmonizedClass>(); dic1.Add(3, cn1); dic1.Add(1, cn2); dic1.Add(2, cn3); //上面dic1.Add()故意不按照顺序 Dictionary< int , CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value); foreach (KeyValuePair< int , CustmonizedClass> item in dic1_SortedByKey) { Console.WriteLine( "Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} " , item.Key,item.Value.stuName,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore); } Console.ReadLine(); } } } |
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Dictionary< int , CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value); |
结果截图:
降序排序:
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Dictionary< int , CustmonizedClass> dic1_SortedByKey = dic1.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, o => o.Value); |
结果截图:
按照Dictionary的Value值的某个属性 升序排序(OrderBy)、降序排序(OrderByDescending):
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace CSharp中Dictionary排序方式 { public class Program { static void Main( string [] args) { CustmonizedClass cn1 = new CustmonizedClass(); cn1.stuName = "张三" ; cn1.stuAge = 18; cn1.stuSex = "男" ; cn1.stuScore = 89.5; CustmonizedClass cn2 = new CustmonizedClass(); cn2.stuName = "李四" ; cn2.stuAge = 19; cn2.stuSex = "男" ; cn2.stuScore = 88.5; CustmonizedClass cn3 = new CustmonizedClass(); cn3.stuName = "王五" ; cn3.stuAge = 17; cn3.stuSex = "女" ; cn3.stuScore = 89.5; Dictionary< int , CustmonizedClass> dic1 = new Dictionary< int , CustmonizedClass>(); dic1.Add(3, cn1); dic1.Add(1, cn2); dic1.Add(2, cn3); //上面dic1.Add()故意不按照顺序 //Key升序 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value); //Key降序 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, o => o.Value); //Value中stuAge属性 Dictionary< int , CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuAge).ToDictionary(p => p.Key, o => o.Value); foreach (KeyValuePair< int , CustmonizedClass> item in dic1_SortedByKey) { Console.WriteLine( "Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} " , item.Key,item.Value.stuName,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore); } Console.ReadLine(); } } } |
关键修改这句:
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Dictionary< int , CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuAge).ToDictionary(p=>p.Key,o=>o.Value); |
结果截图:
混合排序:类似EXCEL中先按第一列升序、再按第3列的升序……
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace CSharp中Dictionary排序方式 { public class Program { static void Main( string [] args) { CustmonizedClass cn1 = new CustmonizedClass(); cn1.stuName = "张三" ; cn1.stuAge = 18; cn1.stuSex = "男" ; cn1.stuScore = 89.5; CustmonizedClass cn2 = new CustmonizedClass(); cn2.stuName = "李四" ; cn2.stuAge = 19; cn2.stuSex = "男" ; cn2.stuScore = 88.5; CustmonizedClass cn3 = new CustmonizedClass(); cn3.stuName = "王五" ; cn3.stuAge = 17; cn3.stuSex = "女" ; cn3.stuScore = 89.5; Dictionary< int , CustmonizedClass> dic1 = new Dictionary< int , CustmonizedClass>(); dic1.Add(3, cn1); dic1.Add(1, cn2); dic1.Add(2, cn3); //上面dic1.Add()故意不按照顺序 //Key升序 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(p=>p.Key).ToDictionary(p => p.Key, o => o.Value); //Key降序 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, o => o.Value); //Value中stuAge属性 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuAge).ToDictionary(p => p.Key, o => o.Value); //混合排序 等同于下列的linq语句 //Dictionary<int, CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuScore).ThenByDescending(o=>o.Value.stuAge).ToDictionary(p=>p.Key,o=>o.Value); //linq语句 var dic1_SortedByKey = from n in dic1 orderby n.Value.stuScore, n.Value.stuAge descending select n; foreach (KeyValuePair< int , CustmonizedClass> item in dic1_SortedByKey) { Console.WriteLine( "Key:{0} ; Value: name:{1}, age:{2}, sex:{3}, score:{4} " , item.Key,item.Value.stuName,item.Value.stuAge,item.Value.stuSex,item.Value.stuScore); } Console.ReadLine(); } } } |
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Dictionary< int , CustmonizedClass> dic1_SortedByKey = dic1.OrderBy(o => o.Value.stuScore).ThenByDescending(o=>o.Value.stuAge).ToDictionary(p=>p.Key,o=>o.Value); |
等同于linq语句:
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var dic1_SortedByKey = from n in dic1 orderby n.Value.stuScore, n.Value.stuAge descending select n; |
结果截图:
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原文链接:https://www.cnblogs.com/5696-an/p/5625142.html