c# - Linq查询到orderby级别然后是父项和子项

我查看了一些orderby示例，但是我仍然对最好的linq表达式感到困惑，这些表达式可以对代码中的程序集进行排序以生成此列表：

Level Parent      Child
1     L010057501U 231-100-002
1     L010057501U 307-355-022
2     307-355-022 307-355-058
3     307-355-058 355-100-008
3     307-355-058 357-200-002
2     307-355-022 307-355-059
3     307-355-059 355-200-005
3     307-355-059 357-100-002

结果需要按级别排序，但是子级需要紧接在父级之后，再列出下一个父级。组件的组件可能有多个层次。我希望我已经充分解释了。

    class Program
{
    static void Main(string[] args)
    {
        SortAssembly();
        Console.ReadLine();
    }
    class Assembly
    {
        public int Level { get; set; }
        public string Parent { get; set; }
        public string Component { get; set; }
    }

    private static void SortAssembly()
    {
        Assembly[] assemblies = {
            new Assembly { Level=1, Parent="L010057501U", Component="231-100-002" },
            new Assembly { Level=1, Parent="L010057501U", Component="307-355-022" },
            new Assembly { Level=2, Parent="307-355-022", Component="307-355-058" },
            new Assembly { Level=2, Parent="307-355-022", Component="307-355-059" },
            new Assembly { Level=3, Parent="307-355-058", Component="355-100-008" },
            new Assembly { Level=3, Parent="307-355-059", Component="355-200-005" },
            new Assembly { Level=3, Parent="307-355-059", Component="357-100-002" },
            new Assembly { Level=3, Parent="307-355-058", Component="357-200-002" }
        };

        var query = ???

        foreach (var part in query)
        {
            Console.WriteLine("{0} - {1} - {2}", part.Level, part.Parent, part.Component);
        }
    }
}

1-L010057501U-231-100-002
1-L010057501U-307-355-022
____2-307-355-022-307-355-058
________3-307-355-058-355-100-008
________3-307-355-058-357-200-002
____2-307-355-022-307-355-059
________3-307-355-059-355-200-005
________3-307-355-059-357-100-002

我尝试实现IComparable，但我没有掌握。仍然需要帮助。

最佳答案

您可以尝试以下

using System;
using System.Linq;


    public class Assembly
    {
        public int Level { get; set; }
        public string Parent { get; set; }
        public string Component { get; set; }
        public bool Visited{get;set;} // to track visited levels
    }
public class Program
{
    public static void Main()
    {
                Assembly[] assemblies = {
            new Assembly { Level=1, Parent="L010057501U", Component="231-100-002" },
            new Assembly { Level=1, Parent="L010057501U", Component="307-355-022" },
            new Assembly { Level=2, Parent="307-355-022", Component="307-355-058" },
            new Assembly { Level=2, Parent="307-355-022", Component="307-355-059" },
            new Assembly { Level=3, Parent="307-355-058", Component="355-100-008" },
            new Assembly { Level=3, Parent="307-355-059", Component="355-200-005" },
            new Assembly { Level=3, Parent="307-355-059", Component="357-100-002" },
            new Assembly { Level=3, Parent="307-355-058", Component="357-200-002" }
        };
        DisplayAssemblies(assemblies);

    }

    private static void DisplayAssemblies(Assembly[] data)
    {
        // order the data to be sorted by levels
        var levels=data.OrderBy(t=>t.Level);
        foreach(var level in levels)
            if(!level.Visited)
                DisplayLevel(level,data);

    }

    private static void DisplayLevel(Assembly level, Assembly[] data)
    {
        var childs=data.Where(t=>t.Parent==level.Component).ToArray();
        Console.WriteLine("{0} - {1} - {2}", level.Level, level.Parent, level.Component);
        level.Visited=true;
        foreach(var child in childs)
        {
            DisplayLevel(child,data);
        }
    }
}

输出：

1 - L010057501U - 231-100-002
1 - L010057501U - 307-355-022
2 - 307-355-022 - 307-355-058
3 - 307-355-058 - 355-100-008
3 - 307-355-058 - 357-200-002
2 - 307-355-022 - 307-355-059
3 - 307-355-059 - 355-200-005
3 - 307-355-059 - 357-100-002

这是Live DEMO

希望能帮到你

关于c# - Linq查询到orderby级别然后是父项和子项，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/26952205/