如何在列表框中添加关闭按钮

Question

I'm using Textbox to add cities name to Listbox along with cities name i want to add close button, so i can remove cities names from listbox easily.
below image is for better understand

HTML

<asp:TextBox ID="txtcity" runat="Server"></asp:TextBox>
<asp:Button ID="btnAddcity" runat="server" Text="Add" />
<asp:ListBox ID="listBoxcity" runat="server"></asp:ListBox>
<span id="spcity"></span>

JQuery

$("#btnAddcity").click(function () {
  var txt = $("#txtcity").val();
  $('[id$=listBoxcity]').show();
  var alreadyExist = false;
  $('[id$=listBoxcity] option').each(function () {
  if ($(this).val() == txt) {
    $("#spcity").text('City alread exists');
     alreadyExist = true;
     return;
  }
});
if (!alreadyExist) {
  $('[id$=listBoxcity]').append($('<option></option>').attr('value', txt).text(txt));
 }
});

Answer 1

I removed option select, cus you cannot add delete button on option. Just take a look if you were trying to do this:

 $("#btnAddcity").click(function () { var txt = $("#txtcity").val(); $('[id$=listBoxcity]').show(); var alreadyExist = false; $('[id$=listBoxcity] option').each(function () { if ($(this).val() == txt) { $("#spcity").text('City alread exists'); alreadyExist = true; return; } }); if (!alreadyExist) { $('[id$=listBoxcity]').append($('<span></span>').attr('value', txt).text(txt)); $('[id$=listBoxcity]').append($('<a href="#" class="delete">x</a><br>')); } }); $(document).on('click', 'a.delete', function(event){ $(this).prev('span').remove(); $(this).next('br').remove(); $(this).remove(); }); 

 a.delete { margin-left: 10px; width: 20px; height: 20px; background: #82854C; border-radius: 100%; text-align: center; display: inline-block; color: #fff; vertical-align: middle; text-decoration: none; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script> <table> <tr> <td><input id='txtcity' type="text" /></td> <td><input id='btnAddcity' type='button' value='Add' /></td> </tr> </table> <!-- <select id='listBoxcity' multiple="multiple" style='width:300px; height:100px;'> </select> --> <div id='listBoxcity' multiple="multiple" style='width:300px; height:100px;'> </div> <span id='spcity'></span> 

Answer 2

This snippet is work for me :)

$(document).ready(function(){
$("#btnAddcity").click(function () {
  var txt = $("#txtcity").val();
  $('[id$=listBoxcity]').show();
  var alreadyExist = false;
  $('[id$=listBoxcity] option').each(function () {
  if ($(this).val() == txt) {
    $("#spcity").text('City alread exists');
     alreadyExist = true;
     return;
  }
});
var count = 0;
if (!alreadyExist) {
count++;
  $('[id$=listBoxcity]').append($('<span></span>').attr('value', txt).text(txt));
   $('[id$=listBoxcity]').append($('<div class="delete">x</div><br>'));
 }

 $('.delete').on('click',function(e){
    console.log($(this).closest('span'));
   $(this).next('br').remove();
   $(this).prev('span').remove();
   $(this).remove(); 
  });
});

});