blocks|key|1020884|text|你可以创建一个包含你的‘参数’的类，并将它提供给函数？这样你就可以给它们起任何你想要的名字了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1020885|据我所知，你不能在行内给它们命名。|1020886|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

You can create a class which contains your 'parameters' and supply that to the func? That way you can name them anything you want.

As far as I know you can't name them inline.

blocks|key|2922192|text|不幸的是，我不认为这是可能的。一旦你有了一个从lambda或其他方法创建的委托的实例，你就失去了随之而来的参数名。所以没有对智能感知的支持。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2922193|但是，您始终可以通过检查实例的关联MethodInfo对象的参数来找出参数的名称。你只是得不到对它的编译时支持。|offset|length|style|CODE|2922194|例如，|2922195|Action<string,+int>+myAction+=+(myString,+myInt)+=>+{+};
var+parameters+=+myAction.Method.GetParameters();
var+paramNames+=+String.Join(",+",+parameters.Select(p+=>+p.Name));+//+myString,+myInt|code-block|syntax|javascript|2922196|entityMap^0|0|H|A|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|U|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|V|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I don't think that's possible unfortunately. Once you have an instance of a delegate that was created from a lambda or other method, you loose the argument names that went along with it. So no intellisense support.

However you could always find out the names of the parameters by inspecting the parameters of the associated <code>MethodInfo</code> object for the instance. You just won't get the compile-time support for it.

e.g.,

<pre><code>Action&lt;string, int&gt; myAction = (myString, myInt) =&gt; { };
var parameters = myAction.Method.GetParameters();
var paramNames = String.Join(", ", parameters.Select(p =&gt; p.Name)); // myString, myInt
</code></pre>

blocks|key|2922207|text|你不能用内置的Func类型做到这一点，但是创建你自己的自定义委托类型并以类似的方式使用它已经很容易了：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2922208|_messageProcessing.Add("input",+(x,+y,+z)+=>+"output");
_messageProcessing.Add("another",+(x,+y,+z)+=>+"example");

//+...

delegate+string+DispatchFunc(DynamicEntity+first,+DynamicEntity+second,
+++++++++++++++++++++++++++++IEnumerable<DynamicEntity>+collection);

Dictionary<string,+DispatchFunc>+_messageProcessing;|code-block|syntax|javascript|2922209|entityMap^0|7|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can't do it with the built-in <code>Func</code> types, but it's easy enough to create your own custom delegate type and use it in a similar way:

<pre><code>_messageProcessing.Add("input", (x, y, z) =&gt; "output");
_messageProcessing.Add("another", (x, y, z) =&gt; "example");

// ...

delegate string DispatchFunc(DynamicEntity first, DynamicEntity second,
 IEnumerable&lt;DynamicEntity&gt; collection);

Dictionary&lt;string, DispatchFunc&gt; _messageProcessing;
</code></pre>

blocks|key|2922217|text|在C#+7中，您可以通过以下方式使用命名元组来实现它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2922218|Func<(string+firstName,+string+lastName),+string>+f+=+(data)+=>+data.firstName+%2B+data.lastName;
f(("Foo",+"Bar"));|code-block|syntax|javascript|2922219|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

As of C# 7 you can achieve it using named tuples this way:

<pre><code>Func&lt;(string firstName, string lastName), string&gt; f = (data) =&gt; data.firstName + data.lastName;
f(("Foo", "Bar"));
</code></pre>

I have a "dispatch map" defined as such:

<pre><code>private Dictionary&lt;string, Func&lt;DynamicEntity, DynamicEntity, IEnumerable&lt;DynamicEntity&gt;, string&gt;&gt; _messageProcessing;
</code></pre>

This allows me to dispatch to different methods easily depending on the name of the DynamicEntity instance.

To avoid being hated by everyone who maintains the code forever more, is there any way of naming the parameters in the Func to give some clue to which DynamicEntity is which?

Can you name the parameters in a Func<T> type?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个这样定义的“调度图”：private Dictionary<string, Func<DynamicEntity, DynamicEntity, IEnumerable<DynamicEntity>, string>> _messageProcessing;这使我可以根据DynamicEntity实例的名称轻松...

问你能在Func<T>类型中命名参数吗？
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问你能在Func<T>类型中命名参数吗？EN