将属性动态添加到“动态”类型

Question

如果我有一个属性信息的列表，以及它们来自的对象的实例，我如何创建另一个包含这些属性和值的对象？

例如

public dynamic Sanitize<T>(T o)
{
    if (ReferenceEquals(o, null))
    {
        return null;
    }

    var type = o.GetType();

    var propertyInfos = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);

    dynamic sanitized = new ExpandoObject();

    foreach (var propertyInfo in propertyInfos)
    {
        var name = propertyInfo.Name;
        var value = propertyInfo.GetValue(o, null);

        // Add this property to `sanitized`
    }

    return sanitized;
}

Answer 1

您可以将 ExpandoObject 转换为 IDictionary<string, object>，然后在运行时对其进行操作以添加属性：

var sanitized = new ExpandoObject() as IDictionary<string, object>;

foreach (var propertyInfo in propertyInfos)
{
    var name = propertyInfo.Name;
    var value = propertyInfo.GetValue(o, null);
    sanitized.Add(name, value);
}

将属性动态添加到“动态”类型

Dynamically add properties to `dynamic` type

c#

reflection

reflection.emit

system.reflection

dynamic-typing