如果只有某些对象属性为空，如何以更优雅的方式检查 C#？

Question

I have an objekt:

var object = new SomeObjectType()
{
   Prop1 = null,
   Prop2 = null,
   Prop3 = 665
}

Assuming that Prop3 will be never null , how can I verify if rest of the properties are null , or one of them is not?

Right now I have:

if (object.Prop1 == null && object.Prop2 == null)
{
   //do stuff
}

But this is very not elegant, especially if I have pore properties to verify. And I have no idea how could I use Null-conditional operators ?. and ?[] in my case.

How to do it with C#?

Answer 1

There's many ways of doing this, perhaps one of the more easily readable is:

var o = new SomeObjectType    // object is a keyword
{
   Prop1 = null,
   Prop2 = null,
   Prop3 = 665
};

if(o is SomeObjectType { Prop1: null, Prop2: null } )
    ; // do stuff

Answer 2

Putting it in a non-Linq way then try something like this as an outline:

int nullCount = 0
foreach (var property in object.GetType().GetProperties()) 
{
    if (property.GetValue(object) == null) nullCount++;
}

if (nullCount == 1)
{
    // do my first thing
}
else
{
    // do my other thing
}

Answer 3

You can achieve it with,

public bool hasMethod(object yourObject, string Prop)
{
    return yourObject.GetType().GetMethod(Prop) != null;
}