C# 获取列表中的项目
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/1216438/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Getting an item in a list
提问by JL.
I have the following list item
我有以下列表项
public List<Configuration> Configurations
{
get;
set;
}
public class Configuration
{
public string Name
{
get;
set;
}
public string Value
{
get;
set;
}
}
How can I pull an item in configuration where name = value?
如何在名称 = 值的配置中提取项目？
For example: lets say I have 100 configuration objects in that list.
例如：假设我在该列表中有 100 个配置对象。
How can I get : Configurations.name["myConfig"]
我怎样才能得到：Configurations.name["myConfig"]
Something like that?
类似的东西？
UPDATE: Solution for .net v2 please
更新：请解决.net v2
采纳答案by Greg Beech
Using the List<T>.Findmethod in C# 3.0:
使用List<T>.FindC# 3.0 中的方法：
var config = Configurations.Find(item => item.Name == "myConfig");
In C# 2.0 / .NET 2.0 you can use something like the following (syntax could be slightly off as I haven't written delegates in this way in quite a long time...):
在 C# 2.0 / .NET 2.0 中，您可以使用类似以下内容（语法可能稍有偏差，因为我已经很长时间没有以这种方式编写委托了...）：
Configuration config = Configurations.Find(
delegate(Configuration item) { return item.Name == "myConfig"; });
回答by weiqure
Try List(T).Find(C# 3.0):
尝试列表（T）。查找（C# 3.0）：
string value = Configurations.Find(config => config.Name == "myConfig").Value;
回答by Dykam
Consider using a Dictionary, but if not:
考虑使用字典，但如果不是：
You question wasn't fully clear to me, one of both should be your answer.
你的问题对我来说并不完全清楚，两者之一应该是你的答案。
using Linq:
使用 Linq：
var selected = Configurations.Where(conf => conf.Name == "Value");
or
或者
var selected = Configurations.Where(conf => conf.Name == conf.Value);
If you want it in a list:
如果你想把它放在一个列表中：
List<Configuration> selected = Configurations
.Where(conf => conf.Name == "Value").ToList();
or
或者
List<Configuration> selected = Configurations
.Where(conf => conf.Name == conf.Value).ToList();
回答by Amber
It seems like what you really want is a Dictionary (http://msdn.microsoft.com/en-us/library/xfhwa508.aspx).
看起来您真正想要的是字典（http://msdn.microsoft.com/en-us/library/xfhwa508.aspx）。
Dictionaries are specifically designed to map key-value pairs and will give you much better performance for lookups than a List would.
字典专门用于映射键值对，并且比 List 为您提供更好的查找性能。
回答by Jason Evans
Here's one way you could use:
这是您可以使用的一种方法：
static void Main(string[] args)
{
Configuration c = new Configuration();
Configuration d = new Configuration();
Configuration e = new Configuration();
d.Name = "Test";
e.Name = "Test 23";
c.Configurations = new List<Configuration>();
c.Configurations.Add(d);
c.Configurations.Add(e);
Configuration t = c.Configurations.Find(g => g.Name == "Test");
}
