"This item is localized" when trying to localize component using the core service

Question

I'm seeing the below error when trying to update a components content field.

This item is localized

I have the following code which strips out the content, calls off to a couple of methods that updates the content source xml to that of replacedContentSource. I only get an error when trying to localize the component. The reason I am having to do this is because the component content source contains component links linking to a publication not in the content master.

public void LocalizeAndAddComponentLinks(CoreServiceClient client, ComponentData component, 
                                         string source)
{
    string contentSource = Tridion.CreateRelatedComponents(client, source);
    string replacedContentSource = Tridion.GenerateTcmIds(contentSource);

    component.Content = replacedContentSource;

    client.Localize(component.Id, new ReadOptions());
    client.Update(component, new ReadOptions());
}

I just don't understand why I'm getting this error, the component isn't localized and I've verified this by checking in Tridion.

Answer 1

Thought I'd add the answer to this question so everyone knows where the problem was.

Basically I have this client.Localize(component.Id, new ReadOptions()); meaning I want to localize the component at the level it has been created. This won't work and you can test this by going to the component in Tridion - right click on the component and try to localize, it won't work as the option is grayed out.

So I need to change this line of code to specify the publication Id of where I want to localize this component as already pointed out by Frank too!

I will probably do a .Replace() and strip out the publication Id changing it for my target publication.

UPDATE

Just wanted to share my answer to show you how I've got this working by using a .Replace()

    public void LocalizeAndAddComponentLinks(CoreServiceClient client, ComponentData component, string source)
    {
        string contentSource = Tridion.ReplaceSystemComponentIdsWithWebsiteMasterId(client, source);
        var localizedComponent = (ComponentData)client.Localize(component.Id.Replace("tcm:xxx-", "tcm:xxx-"), new ReadOptions());
        localizedComponent.Content = contentSource;

        client.Update(localizedComponent, new ReadOptions());
    }

As pointed out by user978511 using a .Replace() might not be the best approach so I will bed taking a look at the .GetTcmUri method to improve my code.