有没有更好的方法将虚线路径作为字符串？

Question

有没有更好的方法将虚线路径变成字符串？//I can do something ugly like$"{nameof(obj)}.{nameof(obj.RelatedObj)}.{nameof(obj.RelatedObj.Field)}";我在为这个问题寻找更好的解决方案时遇到了问题。

Answer 1

你可以用表达式解析它：

public string NameOf<TTarget, TProperty>(TTarget dontcare, Expression<Func<TTarget, TProperty>> propertySelector)

{

    var name = propertySelector.Parameters.Single().Name;

    var expression = propertySelector.ToString();

    // remove 'x => '

    expression = Regex.Replace(expression, Regex.Escape(name) + " => ", "");

    // replace 'x.' with '@'

    expression = Regex.Replace(expression, Regex.Escape(name) + @"\.", "");

    return expression;

}

public string NameOf<TProperty>(Expression<Func<TProperty>> propertySelector)

{

    var expression = propertySelector.ToString();

    // remove '() => '

    expression = Regex.Replace(expression, @"\(\) => ", "");

    // replace 'value(...)' with '@'

    expression = Regex.Replace(expression, @"value\([^\)]+\).", "");

    return expression;

}

用法：

var context = new Context();

NameOf(context, x => x.Inner.Inner.Value).Dump(); // Inner.Inner.Value

NameOf(() => context.Inner.Inner.Value).Dump(); // context.Inner.Inner.Value

public class Context

{

    public Context Inner => this;

    public int Value => 1;

}