Cannot use Response.Write in <head> section of aspx page?
I'm trying to use the Response.Write() method to dynamically insert content in the < head > section of an aspx page. I need to inject a string value from a property on a code-behind object which is a link to my CSS file. However, it is not being processed properly at run time. The object is public on the class and is hydrated in the Page_Load() event. Down in the body of the page I can successfully inject other properties from the Corpoartion object with no problem at all.
Why does this not work in the < head > section?
This is the part that does not expand correctly:
<link href="<%= Corporation.PageStyleSheet %>" rel="stylesheet" type="text/css" />
Here is the entire < head > section:
<head runat="server">
<title></title>
<link href="<%= Corporation.PageStyleSheet %>" rel="stylesheet" type="text/css" />
<script language="JavaScript" type="text/JavaScript" src="cntv_menu.js"><开发者_开发知识库/script>
<script language="JavaScript" type="text/JavaScript" src="cntv_category.js"></script>
</head>
What is the reason that this will not expand properly?
You can't use <%= %> inside a runat="server" tag, which your <head> tag is.
You can either change it to <%# %> and DataBind to it in the code-behind, or you can make the link tag runat="server", give it an id and assign the attribute from the code behind.
See this answer, which goes into the details.
Use this:
this.myButton.Attributes.Add(attribute, value);
It worked for me :)
the best way to resolve this problem is using OnPreRender
Example:
First, define your tag:
<link href="~/css/your_default.css" type="text/css" runat="server" id="myCSS" />
And on the OnPreRender:
protected override void OnPreRender(EventArgs e){
base.OnPreRender(e);
myCSS.Attributes["href"] = "~/css/your_new.css";
}
If you write out the full line you should be ok:
<%
Response.write("<link href=\"" + Corporation.PageStyleSheet + "\" rel=\"stylesheet\" />");
%>
P.S. My syntax may not be completely right, sorry in advance.
加载中,请稍侯......
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