How to add string to dropdown menu

Unity Engine
1

Hi,

I’m really new to Unity and C# so sorry if my question is a common one but I could not find anything suitable in Google.

I have a dropdown menu and want to add options from a List into it.

if (myEvent.Code == "Hoffenheim Pass")
            {
                dropdownEventIDs.AddOptions(myEvent.Id);
            }

myEvent.Id is a string and the compiler says that I can’t compile a string in System.Collections.Generic.List<UnityEngine.UI.Dropdown.OptionData>

What do I have to do to add my IDs (string) to the dropdown menu?

2

Look at the documentation for the Dropdown.AddOptions call’s arguments.

You’ll notice three varieties of things you can pass in: a list of strings, a list of sprites, or a list of “Dropdown.OptionData” objects, whatever those are.

If you are just adding a single string, you probably just need to make a list out of that string ( a list of one thing) and pass that in.

The C# syntax for that sort of “transient” list looks like:

dropdownEventIDs.AddOptions( new List<string> { myEvent.Id}  );

That’s the general layout for an initializer for making a list of strings, and you are supplying only one string to it, then immediately passing it into AddOptions.

This is also presuming that your identifier dropdownEventIDs is actually a single Dropdown object, but it also ends with an “s”, making me think it might be a list, not just a single object. If it is a bunch of dropdown objects (list or array) then you would need to dereference it first.

3

Thanks for your fast answer. You’re presuming it right.
I adapted the code to the following and it works now. Thanks

        var options = new List<string>();
        foreach (var myEvent in events)
        {
            if (myEvent.Code == "Hoffenheim Pass")
            {
                options.Add(myEvent.Id);
            }
        }
        dropdownEventIDs.AddOptions(options);
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