Question

I have a textbox with default text like “Enter Name”

Once user starts typing some text or focuses on the textbox (with MouseEnter or KeyboardFocus), i want the default text to go and only user input to show.

But if user leaves it blank without any input and then MouseLeave or LostKeyboardFocus, I want the default text to reappear.

I think it is the simplest of pattern I am trying to implement, but not quite getting there.

How can i handle it in elegant standard way ? Do i need to be using custom variables to keep track of state amongst this event flow or WPF textbox events will suffice ?

Pseudo-code Example to do so will be great.

Answer 1

Some pseudo-code here:

textBox.Text = "Please enter text...";
...
private string defaultText = "Please enter text...";

GotFocus()
{
  if (textBox.Text == defaultText) textBox.Text = string.Empty;
}

LostFocus()
{
  if (textBox.Text == string.Empty) textBox.Text = defaultText;
}