如何使用JavaScript或Ajax在下拉菜单中显示每个选项的工具提示? [英] How can I show a tooltip for each option on a dropdown with JavaScript or Ajax?

问题描述

如何使用JavaScript或Ajax在下拉菜单中显示每个选项的工具提示?

How can I show a tooltip for each option on a dropdown with JavaScript or Ajax?

后面的代码很容易显示出来，但是此工具提示不如使用JavaScript创建的工具提示那么快.

It is easy to show with the code behind, but this tooltip is not as fast as a tooltip created with JavaScript.

推荐答案

您可以通过以下代码将其添加到javascript中来做类似的事情:

You can do something like this with help of javascript by adding this from code behind:

DropDown1.Attributes.Add("onmouseover", 
                         "this.title=this.options[this.selectedIndex].title");

OR

<select name="DropDownList1" id="DropDownList1"
     onmouseover="this.title=this.options[this.selectedIndex].title">
    <option value="1" title="asd">asd</option>
    <option value="2" title="zxc">zxc</option>
    <option value="3" title="qwe">qwe</option>
</select>

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