C# TypeDescriptor初了解

最新推荐文章于 2024-07-05 23:23:43 发布

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最新推荐文章于 2024-07-05 23:23:43 发布

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原文链接：https://juejin.im/post/5a6da2f051882573315c9e27

本文介绍了组件特性，包括属性、事件等，并详细解释了TypeDescriptor类如何获取组件属性集合，及其实现动态扩展的方式。

说明
Provides information about the characteristics for a component, such as its attributes, properties, and events. This class cannot be inherited.
提供了一些关于组件特征的一些信息，例如：属性（attributes），属性（properties），事件，该类不能被集成。

GetProperties(Object)
Returns the collection of properties for a specified component. 针对某一特定组件，返回该组件的所有属性集合。

TypeDescriptor is an extensible inspection mechanism for components: those classes that implement the IComponent interface. Unlike reflection, it does not inspect for methods. TypeDescriptor can be dynamically extended by several services available through the target component's Site. The following table shows these services.

得到特定属性（Attribute）的值

PropertyDescriporCollection myPropertyDescriporCollection = TypeDescripor.GetProperties(this);
for(PropertyDescripor myPropertyDescripor in myPropertyDescriporCollection)
{
    FieldAttribute myFieldAttribute = myPropertyDescripor.Attributes(typeof(FieldAttribute)) as FunctionParameterAttribute
    
    string fieldName = TableAttribute.FieldName;//User
    DbType fileDbType = TableAttribute.DbType;// DbType.String
}

public Class User
{
    [Filed("User",DbType.String)]
    public string User { get; set; }
}

public Class FieldAttrubute:Attribute
{
    public FieldAttrubute(string name,DbType dbType)
    {
        Name = name;
        FieldDbType = dbType;
    }
    public string Name{ get; set; }
    public DbType FieldDbType { get; set; }
}
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