public void OnValueDateChanged(string input)
    {
        int index = 0;
        string format = "##/##/####";

        string output = format;

        for (int i = 0; i < input.Length; ++i)
        {
            index = output.IndexOf("#");
            if (index < 0)
                break;
            if (index == 0)
                output = input[i] + output.Substring(1);
            else if (index == output.Length - 1)
                output = output.Substring(0, index) + input[i];
            else
                output = output.Substring(0, index) + input[i] + output.Substring(index + 1);
        }

        if (index >= 0)
            output = output.Substring(0, index + 1);


        if (input.Length == 0)
        {
            output = string.Empty;
        }

        dataNasciOutput.text = output;
    }