c# - How to make textbox visible when previous textbox contains text -


i have webform in need place around 30 textboxes enter barcode scanned data. making first textbox visible , want next textbox visible when previous textbox filled text. tried using 'if' condition in textbox on selected change doesn't work. solutions?

you should use java-script because if use server side function go server many times application performance decrease.

so create java-script function accept 1 argument. argument take next text box id (text box u want display). call javascript function this:- onkeyup="calgrid(this,"textbox2");" pass nexttextbox id in place of textbox2...

<script type="text/javascript" language="javascript">   function calgrid(firsttextbox,nexttextbox) {      var id=firsttextbox.id;     var lastindex= id.lastindexof("_");     var strclnt=id.slice(0,lastindex+1);     var txtboxvalue=document.getelementbyid(firsttextbox).value; if(txtboxvalue!="") {       document.getelementbyid(strclnt+nexttextbox).style.visibility='visible'; } else {   document.getelementbyid(strclnt+nexttextbox).style.display = "none"; }   } </script>

note:- if visible=false textbox property cannt visible=true javascript. set style textbox style="display:none"


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