点击我的下拉列表中的某个项目时,需要采取一些措施。每次返回页面时都会触发当前SelectedIndexChanged事件,而不更改下拉列表中的选择。我想添加一个点击事件,这样它实际上可以在实际点击项目时采取行动。但是,下拉列表没有click事件。我可以做些什么来强制点击事件吗?
答案 0 :(得分:2)
我对你想要实现的目标不满意,但这是一个简单的例子,每次点击一个下拉项时触发一个功能
function log(event){
console.log(event.target.text)
}

.dropbtn {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
/* The container <div> - needed to position the dropdown content */
.dropdown {
position: relative;
display: inline-block;
}
/* Dropdown Content (Hidden by Default) */
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}
/* Links inside the dropdown */
.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
/* Change color of dropdown links on hover */
.dropdown-content a:hover {background-color: #f1f1f1}
/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content {
display: block;
}
/* Change the background color of the dropdown button when the dropdown content is shown */
.dropdown:hover .dropbtn {
background-color: #3e8e41;
}
&#13;
<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
<a href="#" onclick="log(event)">Link 1</a>
<a href="#" onclick="log(event)">Link 2</a>
<a href="#" onclick="log(event)">Link 3</a>
</div>
</div>
&#13;