[CSharp] transmission comprising a plurality of attributes of the object, wherein the individual property values only change the method of

demand

If there is such a demand, an object Personproperty is set within the outsourcing to another class Options,

And to set the Personproperties of an object, you must pass a Optionsinstance,

But can not re-set again for each property, located only attribute to modify.

• Code base

public class Options
{
    public string Name { get; set; } = "";
    public int Age { get; set; } = 0;
    public string Gerder { get; set; } = "";
}

public class Person
{
    public void SetOptions(Options options)
    {
        // 思考一下这里的实现方式
    }
    private Options myOpts = new Options();
}

• Calling code

var p = new Person();

var opts = new Options()
{
    Name = "Hepburn",
    Age = 18,
    Gerder = "Female"
};

p.SetOptions(opts);

/*
 * p
 *  |_Name: Hepburn
 *  |_Age: 18
 *  |_Gender: Female
 *  

    p.SetOptions(new Options() { Age = 19 });

 *  ↓↓↓
 *  
 * p
 *  |_Name: Hepburn
 *  |_Age: 19
 *  |_Gender: Female
 *  
*/

p.SetOptions(new Options() { Age = 19 });

---

• The answer district

↓

↓

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↓

↓

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public void SetOptions(Options options)
{
        foreach (var p in options.GetType().GetProperties())
        {
            if(!p.CanWrite) continue;

            var value = p.GetValue(options);

            var valDefault = p.GetValue(new Options());

            if(value != valDefault)
            {
                p.SetValue(myOpts, value);
            }
        }
}

Thus, when no value is specified will be provided on the same time, requiring the default value is meaningless, for example -1 (minus one), null, etc., because, after once set, by this method no longer change do not return to the default value.