AJAX回发中的标题标签已清除 [英] Title Tag Is Cleared on AJAX Postback
问题描述
我创建了这个简单的ASP.Net页面:
I created this simple ASP.Net page:
<%@ Page %>
<html>
<head runat="server">
<title>
<asp:Literal runat="server" Text="Hello" />
</title>
</head>
<body>
<form runat="server">
<asp:ScriptManager runat="server" />
<asp:UpdatePanel runat="server" ID="Whatev">
<ContentTemplate>
<asp:Button runat="server" Text="AJAX Postback" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
当我单击按钮时，浏览器窗口(IE8)中显示的标题将被删除.选项卡中显示的标题是两个正方形块(也许换行符渲染失败).但是，如果我将标题的所有内容都放在一行上(在下面的代码段中突出显示)，则单击按钮时标题不会更改:
When I click the button, the title shown in the browser window (IE8) is erased. The title shown in the tab is two square blocks (perhaps a failed rendering of newline characters). However, if I put everything for the title on one line (highlighted in the code snippet below), the title does not change when I click the button:
<%@ Page %>
<html>
<head runat="server">
<big><title><asp:Literal runat="server" Text="Hello" /></title></big>
</head>
<body>
<form runat="server">
<asp:ScriptManager runat="server" />
<asp:UpdatePanel runat="server" ID="Whatev">
<ContentTemplate>
<asp:Button runat="server" Text="AJAX Postback" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
我不知道为什么更新面板中的回发会导致标题更改.而且我不知道为什么将所有内容放在一条线上就能解决问题.有任何想法吗?
I have no idea why a postback in an update panel would cause the title to change. And I have no idea why putting everything on one line fixes it. Any ideas?
推荐答案
您可以尝试在其中放置另一个服务器控件，看看奇怪的行为是否消失了.
读完您的问题后，我正在看一些讨论，并
Can you try and place one more server control in it and see if the odd behaviour goes away.
After reading your question, I was looking at few discussions and this one [^]sounds interesting.
If placing another control works then there is something in the way UpdatePanels are executed internally. The odd behavior is a rare one (one server control and dynamic Page title with title not in one line). Might be MS used that scenario in some other way. Do update your findings. I don''t have an ASP.NET environment right now with me or else would had tried my self.
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