Html 如何在 ASP.NET 中为无序列表动态生成列表项？
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How can you dynamically generate list items to an unordered list in ASP.NET?
提问by Mark
I have an error panel that is subbed in to a page if an error goes wrong to gracefully handle and display errors. Currently, I am just appending the error messages to a string and pushing that to a label. If you have multiple errors, this gets messy. Therefore, I'd like to push each error to a list item in a bulleted, unordered list.
我有一个错误面板，如果错误出现错误以正常处理和显示错误，它会嵌入到页面中。目前，我只是将错误消息附加到字符串并将其推送到标签。如果您有多个错误，这会变得混乱。因此，我想将每个错误推送到项目符号无序列表中的列表项。
How can I dynamically generate, from a vb codebehind file, new list items inside of an undordered list element?
如何从 vb 代码隐藏文件动态生成无序列表元素内的新列表项？
回答by Phaedrus
Why not use a BulletedListcontrol? This control will render an unordered list to the client.
为什么不使用BulletedList控件？此控件将向客户端呈现一个无序列表。
<asp:BulletedList ID="BulletedList" runat="Server" BulletStyle="NotSet">
</asp:BulletedList>
You can then add list items programmatically from code behind like this.
然后，您可以像这样从后面的代码中以编程方式添加列表项。
BulletedList.Items.Add("Item1");
You can also accomplish this by adding runat='server'to reference the ULtag server side.
您还可以通过添加runat='server'以引用UL标记服务器端来完成此操作。
<ul id="uList" runat="server">
</ul>
Then in the code behind use the InnerHtmlproperty to programmatically add LItags to the contents within the opening and closing ULtags.
然后在后面的代码中使用该InnerHtml属性以编程方式LI向开始和结束UL标记内的内容添加标签。
uList.InnerHtml += "<li>Item1</li>";
回答by cdeweese
You could use a page level variable to hold the errors, like a list or an array. Then just write a method that does something like:
您可以使用页面级变量来保存错误，例如列表或数组。然后只需编写一个执行以下操作的方法：
Private Sub WriteErrors()
lblErrors.txt = "<ul>"
For Each s as String in _myErrors
me.lblErrors.Text &= "<li>" & s & "</li>"
End For
lblErrors.Text &= "</ul>"
End Sub
