Question

我有2个班级

第1类

public class baseClass
{
   public string prop1{get;set;}
   public string prop2{get;set;}
   public string prop3{get;set;}
}

第2类

public class derived:baseClass
{
    public string prop4{get;set;}
}

现在，当我尝试使用以下代码读取属性时，但很明显它只返回派生类的属性

PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(derived));

有什么方法可以读取派生属性和基类

Answer 1

为什么不使用 Reflection ？

<div class="wrapper">
    <div class="container">
        <h1>Welcome</h1>        
        <form class="form">
            <input type="text" placeholder="name">
            <input type="contact" placeholder="contact number">
            <input type="add" placeholder="Country">
            <input type="Bday" placeholder="Birthday">
            <input type="Age" placeholder="Age">
            <input type="pin" placeholder="Pin number">
            <button type="submit" id="sign">Sign-up</button>
        </form>
    </div>
</div>

Answer 2

实际上它有效：

PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(Derived));

for (int i = 0; i < properties.Count; i++)
{
     Console.WriteLine(properties[i].Name);
}

返回：

prop1 prop2 prop3 prop4

正如我在http://referencesource.microsoft.com/创建的那样，GetProperties()会在内部致电GetProviderRecursive：

/// <devdoc>
///     This method returns a type description provider, but instead of creating
///     a delegating provider for the type, this will walk all base types until
///     it locates a provider.  The provider returned cannot be cached.  This
///     method is used by the DelegatingTypeDescriptionProvider to efficiently
///     locate the provider to delegate to.
/// </devdoc>
internal static TypeDescriptionProvider GetProviderRecursive(Type type) {
    return NodeFor(type, false);    
}

我不知道您尝试获取属性的目的，但正如@Dmitry Bychenko所回答，您可以使用Reflection。您可以在此SO link中检查两种方式的差异。

更新回答：

 var result = typeof(Derived).GetProperties()
                .Select(prop => new
                {
                    prop.Name,
                    prop.PropertyType
                });

Answer 3

我找到了读取属性名称及其类型

的解决方案

var properties = typeof(T).GetFields();
foreach (var prop in properties)
{
  var name =  prop.Name;
  var type = Nullable.GetUnderlyingType(prop.FieldType.FullName) ?? prop.FieldType.FullName);
}

读取派生类和基类的属性

3 个答案: