c# - Winform validate label text length

Question

I have a label that is updating automatically based on other inputs. This label can only be 50 characters long. The following code is working when the apply button is clecked, butI want to check the length when the label is changed, so not just when clicking apply on the form. How should I do this?

        private void labelDescription_Validating(object sender, CancelEventArgs e)
        {
            if (labelDescription.Text.Count() > 50)
            {
                //e.Cancel = true;
                errorProvider.SetError(labelDescription, "Please review your description and shorten to a maximum of 50 characters.");
            }
            else
            {
                //e.Cancel = false;
                errorProvider.SetError(labelDescription, null);
            }
        }

question from:https://stackoverflow.com/questions/65844500/winform-validate-label-text-length

Answer 1

I used the following linked to the TextChanged event:

private void labelDescription_TextChanged(object sender, EventArgs e)
        {
            int noCharacters = labelDescription.Text.Count();

            if (noCharacters > 50)
            {
                errorProvider.SetError(labelDescription, "Please review your description and shorten to a maximum of 50 characters.");
            }
            else
            {
                errorProvider.SetError(labelDescription, null);
            }
        }