网站按钮点击空异常答案

【问题标题】：Website button click null exception网站按钮点击空异常
【发布时间】：2016-06-15 21:34:19
【问题描述】：

尝试在 c# 中单击站点的按钮时出现空异常

代码如下：

WebBrowser webb = new WebBrowser();

webb.Navigate("http://10.0.3.190:8880/guest/s/default/? id=9c:ad:97:cb:9d:15&ap=dc:9f:db:b0:ab:64&t=1456946961");

        HtmlElement button = webb.Document.GetElementById("connect");
        if (button == null)
        {
            MessageBox.Show(" id not found");

        }
            else if (button != null)
            {
            MessageBox.Show(" id found");
             button.InvokeMember("click");


            }

        }

Source For Button

这是网站的完整html：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" dir="ltr">
<head>
<title>Action Required - Guest Access</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" type="text/css" href="http://10.0.3.190:8880/guest/s/default/reset-min.css" />
<link rel="stylesheet" type="text/css" href="http://10.0.3.190:8880/guest/s/default/styles.css" />
<script type="text/javascript" src="http://10.0.3.190:8880/guest/s/default/js/jquery.min.js"></script>
<script type="text/javascript" src="http://10.0.3.190:8880/guest/s/default/js/guest.js"></script>
</head>
<body class="login-page">
<!-- see README.txt for HTML customization instructions -->
<div class="page-content" style="padding-top:100px;">
<div class="login-content content-box">

</div>

<div class="login-content content-box">
<form name="input" method="post" action="login">
<div class="tou-box">
<h2>Terms of Use</h2>
<div class="tou-wrapper" id="tou">
<div class="tou">
<p>Terms of Use</p>
<p>By accessing the wireless network, you acknowledge that you're of legal age, you have read and understood and agree to be bound by this agreement</p>
<ul>
<li>The wireless network service is provided by the property owners and is completely at their discretion. Your access to the network may be blocked, suspended, or terminated at any time for any reason.</li>
<li>You agree not to use the wireless network for any purpose that is unlawful and take full responsibility of your acts.</li>
<li>The wireless network is provided &quot;as is&quot; without warranties of any kind, either expressed or implied. </li>
</ul>
</div>
</div>
<fieldset class="accept-tou">
<input id="accept-tou" type="checkbox" checked="checked" name="accept-tou" value="yes" />
<label class="normal" >I accept the <a href="javascript:void(0)" id="show-tou">Terms of Use</a></label>
</fieldset>
<div class="form-controls">
<!-- submit (only for no authentication) -->
<input name="connect" type="submit" value="Connect" id="connect" class="button requires-tou" />
</div>
</div>
</form>
</div>
</div>

<script type="text/javascript">
jQuery(document).ready(function() {
jQuery('input').keypress(function(e) {
var code = (e.keyCode ? e.keyCode : e.which);
if ( (code==13) || (code==10)) {
jQuery(this).blur();
return false;
}
});
});

$(function() {
$('#tou').hide();
$('#show-tou').click(function() {
$('#tou').show();
});
$('#accept-tou').click(function() {
if (!$('#accept-tou').checked()) {
$('input.requires-tou').disable();
}
else {
$('input.requires-tou').enable();
}
})
});
</script>

</body>
</html>

【问题讨论】：

标签： c# html

【解决方案1】：

冒号运算符保留在 urls 中。您需要对它们进行编码（如 %3A，或遵循以下一些建议。

这可能是重复的： Using a colon (:) in a url with ASP.NET/IIS

【讨论】：

你对这个 Simdi 有什么好运吗？