需要解释一些代码

本文关键字：代码 解释 | 更新日期: 2023-09-27 18:09:13

public object this[string name] 


class ObjectWithProperties
{
    Dictionary<string, object> properties = new Dictionary<string, object>();
    public object this[string name]
    {
        get
        {
            if (properties.ContainsKey(name))
            {
                return properties[name];
            }
            return null;
        }
        set
        {
            properties[name] = value;
        }
    }
}

需要解释一些代码

你将能够使用索引(即没有属性名)直接从对象中引用字典中的值

在你的例子中应该是

var foo = new ObjectWithProperties();
foo["bar"] = 1;
foo["kwyjibo"] = "Hello world!"
// And you can retrieve them in the same manner...
var x = foo["bar"];  // returns 1

MSDN指南:http://msdn.microsoft.com/en-gb/library/2549tw02.aspx

基础教程:http://www.tutorialspoint.com/csharp/csharp_indexers.htm

编辑以回答评论中的问题:

这相当于做以下事情:

class ObjectWithProperties
{
    public Dictionary<string, object> Properties { get; set; }
    public ObjectWithProperties()
    {
        Properties = new Dictionary<string, object>();
    }
}
// instantiate in your other class / app / whatever
var objWithProperties = new ObjectWithProperties();
// set
objWithProperties.Properties["foo"] = "bar";
// get
var myFooObj = objWithProperties.Properties["foo"];   // myFooObj = "bar"
相关文章：