获取变量（不硬codeD）的名字？ [英] Get variable (not hard-coded) name?

问题描述

我要寻找一种方式来获取变量名，这样在需要的时候，我没有使用硬codeD声明（属性名称等。）：

I am looking for a way to retrieve the variable name, so I don't have to use hard-coded declarations when needed (for property names etc.):

我几乎不敢相信这是可能的;也许有人有一个解决方案。 注：即使不变量，属性也将是一个移动

I hardly believe it's possible; maybe someone has a solution. Note: even not variables, properties would also be a move.

'Pseudo:
Module Module1

    Sub Main()
        Dim variable = "asdf"
        Dim contact As New Contact

        Dim v1 = GetVariableName(variable) 'returns variable
        Dim v2 = GetVariableName(contact.Name) 'returns Name

    End Sub

    Class Contact
        Public ReadOnly Property Name()
            Get
                Return Nothing
            End Get
        End Property
    End Class

    Public Function GetVariableName(variable As Object) As String
        ':}
    End Function

End Module

答案是welcommed在任何VB或C＃。

Answers are welcommed in either VB or C#.

推荐答案

哦，有一个简单的解决方案，使用前pression树下面是一个例子，只是适应您的需求在C＃

Oh there is a simple solution, use expression trees here is an example, just adapt to your needs in c#

string GetPropertyName<T>(Expression<Func<T>> property)
{
    MemberExpression ex = (MemberExpression)property.Body;
    string propertyName = ex.Member.Name;
    return propertyName;
}

现在你可以做

String example = null;
String propertyName = GetPropertyName(()=>example.Length);
//propertyName == "Length"

在我第一次看到，这是一个启示！ ;）

The first time I've seen that, it was a revelation ! ;)

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