TeshMeshPro InputFields and onValueChanged event

I'm not extremely well versed with delegates but I feel like I should be able to do something like

textbox.onValueChanged += UpdateText;
OR
textbox.onValueChanged = UpdateText;


private void UpdateText(object sender, EventArgs e)
{
// do things here
}

This doesn't work. What I want to do is have a textbox that can only have one letter in it at a time. so when the user clicks on it and types another key, the current value is replaced with the incoming value. I tried to lookup any documentation on onValueChanged and I've more or less got nothing

 

This is what I ended up doing

Code (CSharp):

1.     public void Start()
2.     {
3.  
4.         foreach (var textbox in Inputs)
5.         {
6.             textbox.text = "";
7.             textbox.onValueChanged.AddListener(delegate { UpdateTextBox(textbox); });
8.         }
9.     }
10.  
11.     public void UpdateTextBox(TMP_InputField textbox)
12.     {
13.         if (textbox.text.Length > 1)
14.         {
15.             textbox.text = textbox.text[1].ToString();
16.         }
17.     }

Then in the inspector, I had all of the TextMeshPro input fields add a reference to the UpdateTextBox method and pass themselves as arguments. I also set the character limit to 2. It seems extremely hacky, but it works.

 

Thank you!

 

That seems to be working as well:

inputField.onValueChanged.AddListener((x) => SomeFunctionName(inputField.text));
and the function looks like this :

public void SomeFunctionName(string newInputFieldText)