在ASP.net MVC 2.0中使用Url.Content

Question

I've seen a lot of examples using Url.Content to reference javascript, form MasterPages in MVC 2.

    <script src="<%: Url.Content("~/Scripts/jquery-1.4.1.min.js") %>" type="text/javascript"></script>

But on runtime I've got failure,

Compilation Error Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0103: The name 'Url' does not exist in the current context.

I haven't find where Url namespace is declared, should additional assemblies be using?

VS2010, IIS 7, ASP.net MVC 2.0

Answer 1

确保您的母版页继承System.Web.Mvc.ViewMasterPage

Answer 2

alex,

try adding the following extension method and see if it get's you any further

public static partial class HtmlHelperExtensions
{
    public static string Script(this HtmlHelper html, string path)
    {
        var filePath = VirtualPathUtility.ToAbsolute(path);
        HttpContextBase context = html.ViewContext.HttpContext;
        // don't add the file if it's already there
        if (context.Items.Contains(filePath))
            return "";
        return "<script type=\"text/javascript\" src=\"" + filePath + "\"></script>";
    }
}

usage:

<%=Html.Script("~/Scripts/jquery-1.4.2.min.js")%>

I know it won't answer your question directly, but will allow you to move fwd...

Answer 3

Removed edit, as single quotes get treated as character literal, so causes 'too many characters in literal' error. The most likely cause is still a typo, IMHO.

ORIGINAL POST (still stands re the UrlHelper class):

Url.Content(): Url here is a helper method, a bit like the Html or Ajax helpers.

In code, I believe its class is:

System.Web.Mvc.UrlHelper

Ie, the namespace is System.Web.Mvc.

So it is very odd that you can't just use it if, that is, you really are using the spec you detailed above.