add script to GameObject at runtime

I am trying to add a script to my GameObject at run time:

Code (CSharp):

1. card.AddComponent<KD_CardScript>();

The script is stored in the editor but not in a GameObject. How do i refer to the script so the code can find it?

 

I don't really get the issue. After executing the code you can see the component / script being added to the GameObject or not? If it has been added, you can simply get and use it (as always) by using GetComponent<KD_CardScript>()

 

Is

card

an instance of a game object or is it a prefab? If you add it to a prefab (a dubious thing to do in my humble opinion) at runtime, then all currently instantiated objects will not contain the change made in the prefab.

However, to access a script in an object you use GetComponent, e.g.

var script = cardInstance.GetComponent<KD_CardScript>();

 

Note that when you use AddComponent, it returns the instance of the script that you add. So if you need access to it right away...

Code (CSharp):

1. KD_CardScript newScript = card.AddComponent<KD_CardScript>();

Otherwise, as mentioned, GetComponent to get the script somewhere else. Or, you can also set the value of AddComponent to a class variable instead to keep the reference and just access it from there.

 

Ok let me try to explain a bit better.

1) I create an object at runtime
2) I have a script (KD_CardScript) that residing in the editor and is not attached to anything
3) I want to attach KD_CardScript to the object that i have created using

Code (CSharp):

1. card.AddComponent<KD_CardScript>();

4) When is run this i get the following message:

The type or namespace name `KD_CardScript' could not be found. Are you missing an assembly reference?

5) I have tried to reference to KD_CardScript in editor but failed. It is stored in "Assets/Scripts". I have never done this before.

I hope this is a bit clearer.

 

Is KD_CardScript in a namespace?
Is the spelling the same? (including caps) of the class name and the script file name.

If using Visual Studios, do you see an error on the line, if so, right clicking on the error and selecting the lightbulb should offer you some fix suggestions also.

 

A shame this was never responded to with a satisfactory response, I have this exact problem.

 

You either have a typo or you're missing a

using SomeNamespace;

statement.

 

Try duplicating or moving the original script to same folder of your main project.
Some plugins downloaded from the web don't have namespaces.

 

I had the same issue. In my case the problem was that the script I tried to add wasn't driving from mono behaviour. Maybe that will help.

 

First check if ur script is working by attaching it manually... if it does ... then it should work like u said.
card.AddComponent<KD_CardScript>();

Moreover if u have public variables (example Health or prefabs) inside that script(in ur case it's KD_CardScript) u can simply assign them as : card.AddComponent<KD_CardScript>().health = 100;

 

It is possible that you are like me did not add namespace while attempting to add script component. So here is the way I wrote it:

GameObject.AddComponent(typeof(namespace.className));

 

Make sure that you are adding classes inheriting from MonoBehaviour.

I've implemented this and it works fine:

Code (CSharp):

1. MyClass _myObject = gameObject.AddComponent<MyClass>();
2. // Awake() and Start() are executed here.
3. _myObject.SomeMethod();