键值对搜索 [英] keyvalue pair searching

问题描述

大家好，
我想知道..如何简化搜索?

Hi Everyone,
I would like to know.. how to simplify this search?

list.Where(x => x.Key == "1" || x.Key == "6"|| x.Key == "7" || x.Key == "8" || x.Key == "9" || x.Key == "10" ||x.Key == "11").ToList();

我有一个从下面的枚举派生的值对列表.

I have a value pair list derived from this enum below.

    public enum LegacyTo : int
{
    Spouse = 1,
    Lifepartner = 2,
    Survivingspouse = 3,
    Survivinglifepartner = 4,
    Children = 5,
    Parents = 6,
    Parentsinlaw = 7,
    ParentsandParentsinlaw = 8,
    Other = 9,
    Institution = 10,
    InterVivostrust = 11
}

现在的情况是，我有条件要过滤:Survivingspouse = 3，ParentsandParentsinlaw = 8，InterVivostrust = 11 ...目前我正以这种方式进行操作，更像是意大利面条...

Now the case is, i have conditions where i have to filter for :Survivingspouse = 3,ParentsandParentsinlaw = 8,InterVivostrust = 11...currently im doing it this way and its more like spaghetti...

list.Where(x => x.Key == "1" || x.Key == "6"|| x.Key == "7" || x.Key == "8" || x.Key == "9" || x.Key == "10" ||x.Key == "11").ToList();

提前感谢...

Thanx in advance...

推荐答案

如果您可以更改枚举值，并且Key是枚举，则它变得很简单:

If you can change the enum values, and the Key is the enum, then it becomes simple:

[Flags]
public enum LegacyTo : int
{
    Spouse = 0x0001,
    Lifepartner = 0x0002,
    Survivingspouse = 0x0004,
    Survivinglifepartner = 0x0008,
    Children = 0x0010,
    Parents = 0x0020,
    Parentsinlaw = 0x0040,
    ParentsandParentsinlaw = 0x0080,
    Other = 0x0100,
    Institution = 0x0200,
    InterVivostrust = 0x0400
}

然后您可以通过 Xoring 与组合值进行与"运算，对照多个值检查该值.如果存在任何一个，则结果将为非零.

[edit]
[Flags]属性已添加(感谢phil.o！)
XOR变成AND(感谢Manfred！)-因为我是个白痴. OriginalGriff
[/edit]

You can then check the value against multiple values by XORing ANDing with the combined value. If any one of them is present, the result will be non-zero.

[edit]
[Flags] attribute added (thanks phil.o!)
XOR becomes AND (thanks Manfred!)- because I''m an idiot. OriginalGriff
[/edit]

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