.net - How to check textbox text changed -


i have textbox of label "name" need disable button(that next button) long textbox empty. appproach

private void planname_textchanged(object sender, textchangedeventargs e)     {         if (planname.text.length != 0)         {             parent.enableordisablenextbutton("enable") ;         }     }

this working first time if user again clear name next button remain enable s or if cut whole field. how this?

you need disable else:

        private void planname_textchanged(object sender, textchangedeventargs e)          {              if (planname.text.length != 0)              {                  parent.enableordisablenextbutton("enable");              }              else                 parent.enableordisablenextbutton("disable");         }

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