如何从表达式中获取字段的名称?

public string GetMemberName<T>(Expression<Func<T>> expr)
{
    var memberExpr = expr.Body as MemberExpression;
    if (memberExpr == null)
        throw new ArgumentException("Expression body must be a MemberExpression");
    return memberExpr.Member.Name;
}

...

MyClass x = /* whatever */;
string name = GetMemberName(() => x.Something); // returns "Something"

必须实现表达式树访问者

http://msdn.microsoft.com/en-us/library/bb882521(VS.90).aspx

在memberaccessexpression访问中输入eval代码

我已经使用了 ncommon 实现这一目标的框架。具体来说,你会对 Expressions namespace