HTML Select控件的服务器事件 [英] Server Event for HTML Select control

问题描述

如何为HTML Select控件添加服务器事件?

How can I add a server event for an HTML Select control?

HTML代码是这样的:

HTML code is like this:

<div class="ui-widget">
    <select id="Select1" runat="server">
        <option>Select one...</option>
        <option>ActionScript</option>
        <option>AppleScript</option>
        <option>Asp</option>
        <option>BASIC</option>
    </select>
</div>

C#代码如下:

public void Select1_SomethingChange(object sender, EventArgs e)
{
    //random code
}

现在，我知道它是行不通的，HTML的第二行需要某种类型的属性..我已经尝试了我能找到的唯一两个，下面是这两个

Now I know just as is it won't work, the 2nd line of the HTML needs an attribute of some kind.. I already tried the only 2 I could find which are these two below

<select id="Select1" runat="server" onServerChanged="Select1_SomethingChange">
<select id="Select1" runat="server" onSelectedIndexChanged="Select1_SomethingChange">    

问题在于，第一个选项事件永远不会触发，而第二个选项根本不存在.请在这里帮助我，欢迎您提供帮助.

The problem is that the first options event never fires, and the 2nd option just doesn't exist. Please help me out here, any help is welcome.

推荐答案

将 runat ="server" 添加到原本正常的HTML元素中时，它将成为 HtmlControl 在服务器端代码中.哪个不会暴露很多事件.为了获得更丰富的服务器端事件，您需要使用ASP.NET控件.在这种情况下，这将是 DropDownList ，它拥有您要查找的事件.

When you add runat="server" to an otherwise normal HTML element, it becomes an HtmlControl in the server-side code. Which doesn't expose a lot of events. In order to get richer server-side eventing, you need to use the ASP.NET controls. In this case that would be a DropDownList, which has the events you're looking for.

类似这样的东西:

<div class="ui-widget">
    <asp:DropDownList id="Select1" OnSelectedIndexChanged="Select1_SomethingChange" runat="server">
        <asp:ListItem Selected="True" Value="White"> White </asp:ListItem>
        <asp:ListItem Value="Select one...">Select one...</asp:ListItem>
        <asp:ListItem Value="ActionScript">ActionScript</asp:ListItem>
        <asp:ListItem Value="AppleScript">AppleScript</asp:ListItem>
        <asp:ListItem Value="Asp">Asp</asp:ListItem>
        <asp:ListItem Value="BASIC">BASIC</asp:ListItem>
    </asp:DropDownList>
</div>

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