c# - 如何从表达式属性中获取名称？

Question

Possible Duplicates:
Get method name and type using lambda expression
Can I use Expression<Func<T, bool>> and reliably see which properties are referenced in the Func<T, bool>?

嗨，

我想要一个方法，我可以像这样使用

<% Html.TextBoxFor(x=>x.Property, Helper.GetAttributes<ViewModel>(x=>x.PropertyA)) %>

方法头看起来像这样

public static Dictionary<string, string> GetAttributeValues<T>(Expression<Func<T, object>> myParam)

但是我如何找到PropertyA的名称呢？在返回正确的属性之前我需要做一些检查。 提前致谢..

干杯

PS:感谢driis帖子How to get names from expression property?我找到了解决办法

是

public static Dictionary<string, string> GetAttributeValues<T>(Expression<Func<T, object>> myParam)
{
    var item = myParam.Body as UnaryExpression;
    var operand = item.Operand as MemberExpression;
    Log.Debug(operand.Member.Name);
}

Answer 1

创建 ModelMetadata 的实例类:

var data = ModelMetadata.FromLambdaExpression<T, object>(myParam);

现在您可以获得有关模型上使用的属性的所有所需信息:

var propName = data.PropertyName;
var label = data.DisplayName;