c# - 将 c# 匿名类对象公开给 COM (JavaScript)

Question

.NET 4.5+ 中是否有类/API 允许将 C# 匿名类的实例公开为 COM 的后期绑定(bind)对象？例如。我想这样做:

webBrowser.Document.InvokeScript("TestMethod", new object[] { 
    new { 
        helloProperty = "Hello!", 
        byeProperty = "Bye!"  
    }
});

并在 JavaScript 中使用它:

function TestMethod(obj)
{
    alert(obj.helloProperty + ", " + obj.byeProperty);
}

创建一个辅助类来包装匿名对象并通过IReflect公开其属性应该不是问题。 ，但也许，这样的事情已经存在了？只是不想重新发明轮子。

Answer 1

我已经根据 excellent blog post 编写了一个辅助类来实现它.

用法:

webBrowser.Document.InvokeScript("TestMethod", new object[] { 
    new Reflector(new { helloProperty = "Hello!", byeProperty = "Bye!" }) });

代码:

[ComVisible(true), ClassInterface(ClassInterfaceType.None)]
public class Reflector :
    System.Reflection.IReflect
{
    object _target;

    protected Reflector() { }

    public Reflector(object target)
    {
        Debug.Assert(target != null);
        _target = target;
    }

    public object Target
    {
        get { return _target; }
    }

    #region IReflect

    public FieldInfo GetField(string name, BindingFlags bindingAttr)
    {
        return this._target.GetType().GetField(name, bindingAttr);
    }

    public FieldInfo[] GetFields(BindingFlags bindingAttr)
    {
        return this._target.GetType().GetFields(bindingAttr);
    }

    public MemberInfo[] GetMember(string name, BindingFlags bindingAttr)
    {
        return this._target.GetType().GetMember(name, bindingAttr);
    }

    public MemberInfo[] GetMembers(BindingFlags bindingAttr)
    {
        return this._target.GetType().GetMembers(bindingAttr);
    }

    public MethodInfo GetMethod(string name, BindingFlags bindingAttr)
    {
        return this._target.GetType().GetMethod(name, bindingAttr);
    }

    public MethodInfo GetMethod(string name, BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers)
    {
        return this._target.GetType().GetMethod(name, bindingAttr, binder, types, modifiers);
    }

    public MethodInfo[] GetMethods(BindingFlags bindingAttr)
    {
        return this._target.GetType().GetMethods(bindingAttr);
    }

    public PropertyInfo[] GetProperties(BindingFlags bindingAttr)
    {
        return _target.GetType().GetProperties(bindingAttr);
    }

    public PropertyInfo GetProperty(string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
    {
        return this._target.GetType().GetProperty(name, bindingAttr, binder, returnType, types, modifiers);
    }

    public PropertyInfo GetProperty(string name, BindingFlags bindingAttr)
    {
        return this._target.GetType().GetProperty(name, bindingAttr);
    }

    public object InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, System.Globalization.CultureInfo culture, string[] namedParameters)
    {
        if (target == this)
        {
            if (name.CompareTo("[DISPID=0]") == 0)
            {
                if (invokeAttr.HasFlag(BindingFlags.InvokeMethod))
                    return this._target;
                else if (invokeAttr.HasFlag(BindingFlags.GetProperty) && args.Length == 0)
                    return this._target.ToString();
            }
            else
            {
                return this._target.GetType().InvokeMember(name, invokeAttr, binder, _target, args, modifiers, culture, namedParameters);
            }
        }
        throw new ArgumentException();
    }

    public Type UnderlyingSystemType
    {
        get { return this._target.GetType().UnderlyingSystemType; }
    }

    #endregion
}