bootstrap-datetimepicker has no icon, what's going on_html/css

bootstrap-datetimepicker has no icon, what's going on_html/css_WEB-ITnose

WBOY

Release： 2016-06-24 11:53:54

Original

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I used asp.net web form and followed the code on the Internet to write it once. Why do others have "left and right" arrows, but mine don't?
My code is as follows:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="DateTimePickerTest4.WebForm1" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">    <title></title>    <link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css">    <link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap-theme.min.css">    <script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script>    <script src="http://cdn.bootcss.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>    <link href="css/bootstrap-datetimepicker.css" rel="stylesheet" type="text/css" />    <script src="js/bootstrap-datetimepicker.min.js" type="text/javascript"></script>    <script src="js/bootstrap-datetimepicker.zh-CN.js" type="text/javascript"></script>    <script type="text/javascript">        $(document).ready(function () {            $("#a").datetimepicker({                language: 'zh-CN',                weekStart: 1,                todayBtn: 1,                autoclose: 1,                todayHighlight: 1,                startView: 2,                minView: 2,                forceParse: 0            });        })//end documnet.ready        </script></head><body>    <form id="form1" runat="server">    <div>        <input id='a' name='a' type="text"  data-date-format="yyyy-MM-dd" />    </div>    </form></body></html>

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The screenshot is like this:

Why is there no arrow? ?

This is what people see online

I just learned front-end programming. Is there some css that I didn’t add? ? ?
Solve. . . . .