C#、Python中分别是怎么实现通过字符串获取实体类的值以及给实体类赋值

<p class="title">一、引入

　　最近遇到一个项目里面的功能，在给实体类赋值的时候，由于赋值字段是动态生成的，所以如果用常用的方法（直接实体类的名称.字段名=要赋的值），将会生成很多无用的代码，所以找到了一个通过反射的赋值与取值的方法，顺便总结一下，以及对比一下与Python语言同样实现该功能的区别之处。

　　

　　

<span style="color: #0000ff">namespace<span style="color: #000000"> ConsoleApplication1
{
<span style="color: #0000ff">class<span style="color: #000000"> Program
{
<span style="color: #0000ff">static <span style="color: #0000ff">void Main(<span style="color: #0000ff">string<span style="color: #000000">[] args)
{
<span style="color: #0000ff">#region 通过字符串设置实体类的值
<span style="color: #008000">//<span style="color: #008000">初始化一个实体类
<span style="color: #008000">//<span style="color: #008000">Student model_stu = new Student();
<span style="color: #008000">//<span style="color: #008000">string id_str = "stu_id";
<span style="color: #008000">//<span style="color: #008000">string name_str = "stu_name";
<span style="color: #008000">//<span style="color: #008000">string addr_str = "stu_address";
<span style="color: #008000">//<span style="color: #008000">Type type = model_stu.GetType();<span style="color: #008000">//<span style="color: #008000">获取类型
<span style="color: #008000">//<span style="color: #008000">PropertyInfo property_info_id = type.GetProperty(id_str);
<span style="color: #008000">//<span style="color: #008000">PropertyInfo property_info_name = type.GetProperty(name_str);
<span style="color: #008000">//<span style="color: #008000">PropertyInfo property_info_addr = type.GetProperty(addr_str);

        </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;property_info_id.SetValue(model_stu,5);
        </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;property_info_name.SetValue(model_stu,"李四");
        </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;property_info_addr.SetValue(model_stu,"北京市");

        </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;Console.WriteLine(model_stu.stu_id);
        </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;Console.WriteLine(model_stu.stu_name);
        </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;Console.WriteLine(model_stu.stu_address);
        </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;Console.ReadKey();</span>
        <span style="color: #0000ff"&gt;#endregion</span>

        <span style="color: #0000ff"&gt;#region</span> 通过字符串获取实体类的值
        <span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;初始化一个实体类</span>
        Student model_stu = <span style="color: #0000ff"&gt;new</span><span style="color: #000000"&gt; Student()
        {
            stu_id </span>= <span style="color: #800080"&gt;1</span><span style="color: #000000"&gt;,stu_name </span>= <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;张三</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;,stu_address </span>= <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;上海市</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;
        };
        </span><span style="color: #0000ff"&gt;string</span> id_str = <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;stu_id</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;;
        </span><span style="color: #0000ff"&gt;string</span> name_str = <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;stu_name</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;;
        </span><span style="color: #0000ff"&gt;string</span> addr_str = <span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;stu_address</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;;
        Type type </span>= model_stu.GetType();<span style="color: #008000"&gt;//</span><span style="color: #008000"&gt;获取类型</span>
        PropertyInfo property_info_id =<span style="color: #000000"&gt; type.GetProperty(id_str);
        PropertyInfo property_info_name </span>=<span style="color: #000000"&gt; type.GetProperty(name_str);
        PropertyInfo property_info_addr </span>=<span style="color: #000000"&gt; type.GetProperty(addr_str);

        Console.WriteLine(property_info_id.GetValue(model_stu));
        Console.WriteLine(property_info_name.GetValue(model_stu));
        Console.WriteLine(property_info_addr.GetValue(model_stu));
        Console.ReadKey();
        </span><span style="color: #0000ff"&gt;#endregion</span><span style="color: #000000"&gt;

    }
}
</span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;class</span><span style="color: #000000"&gt; Student
{
    </span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;int</span> stu_id { <span style="color: #0000ff"&gt;get</span>; <span style="color: #0000ff"&gt;set</span><span style="color: #000000"&gt;; }
    </span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;string</span> stu_name { <span style="color: #0000ff"&gt;get</span>; <span style="color: #0000ff"&gt;set</span><span style="color: #000000"&gt;; }
    </span><span style="color: #0000ff"&gt;public</span> <span style="color: #0000ff"&gt;string</span> stu_address { <span style="color: #0000ff"&gt;get</span>; <span style="color: #0000ff"&gt;set</span><span style="color: #000000"&gt;; }
}

}