VisualStudio 智能感知和 Lambda。我怎样才能让它不选择实际类型？
我正在开发一个实用程序类，并且定义了我的方法之一：
void SomeMethod(Action<T> a);
尴尬的是，在 Visual Studio 2010 中，当您开始键入时：
someClass.SomeMethod(x ...
当您按 [x] 键，然后按 [空格] 时，智能感知会自动选择任何内容第一个类是以“X”开头，通常是一些“XmlWhatever”类
但是，如果我将方法签名更改为：
void SomeMethod(Expression<Action<T>> a);
然后，如果我开始输入相同的用法，则按 [x][space] 会输入实际的字母“x” 。似乎智能感知处理放入 lambda 的参数是 Expression<> 类型，而不是 Action<> 类型。
有什么方法可以让 VS 智能感知正确处理第一种情况吗？我实际上无法传递表达式，因为我的预期用法是：
someClass.SomeMethod(x => x.Property1 = 123);
这会导致错误 CS0832: 表达式树可能不包含赋值运算符 因此，我确实希望传入 Action<> ，我实际上并不需要表达式，它只是修复智能感知。
这确实很烦人，因为当我输入操作参数时，我最终不得不按 [x][esc][space][=][>] 来获取文本“x =>”，添加“escape”按键以关闭智能感知弹出窗口。有什么想法或想法吗？
编辑：
好吧，我实际上必须重新表述一下我的问题。我上面的示例代码并不完全准确。 VS intellisense 似乎就是这种情况：
这是正确处理的：
public static T SomeMethod<T>(Action<T> actions) where T : class
但是 intellisense 没有正确处理：
public static T IsT4<T>(params Action<T>[] actions) where T : class
所以看来 intellisense 不喜欢 params。
I'm working on a utility class and one of my methods is defined:
void SomeMethod(Action<T> a);
The awkward thing is that in Visual Studio 2010, when you start typing:
someClass.SomeMethod(x ...
when you press the [x] key, then [space], the intellisense automatically selects whatever the first class was that started with "X", typically some "XmlWhatever" class
However, if I change my method signature to:
void SomeMethod(Expression<Action<T>> a);
Then if I start typing the same usage, pressing [x][space] puts the actual letter 'x'. It seems the intellisense handles putting in a lambda were a parameter of type Expression<> is expected, but not of type Action<>.
Is there some way to make the VS intellisense handle the first case properly? I can't actually pass in an Expression because my intended usage is:
someClass.SomeMethod(x => x.Property1 = 123);
which leads to the error CS0832: An expression tree may not contain an assignment operator
Hence I do want the Action<> to be passed in, I don't really need an Expression, it just fixes the intellisense.
It is really annoying as it is, because as I type in the Action parameters, I end up having to press [x][esc][space][=][>] to get the text "x =>", adding the "escape" keypress to close the intellisense popup. Any thoughts or ideas?
Edit:
OK I actually have to re-phrase my question a bit. My sample code above wasn't exactly accurate. It seems that this is the case with VS intellisense:
This IS handled correctly:
public static T SomeMethod<T>(Action<T> actions) where T : class
but this is NOT handled correctly by intellisense:
public static T IsT4<T>(params Action<T>[] actions) where T : class
So it seems intellisense doesn't like the params.
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您可以使用显式数组创建语法来解决此问题：
您还可以创建
IsT4方法的额外重载，该方法仅需要 1 个操作委托。You can use the explicit array creation syntax to work around this problem:
You can also create an additional overload of the
IsT4method which takes exactly 1 action delegate.工具|选项| C# |智能感知
取消选中“按空格键提交”。
Tools | Options | C# | Intellisense
Uncheck 'Committed by pressing the space bar'.