带有 Response.AddHeader 的相对路径答案

【问题标题】：Relative Path with Response.AddHeader带有 Response.AddHeader 的相对路径
【发布时间】：2010-03-05 17:09:22
【问题描述】：

在用户更改密码后，我正在运行计时器并执行重定向（AKA，通知他们密码已更改，然后将其发送回主页）。但是，我似乎无法在下面的代码中创建相对路径。下面列出了我喜欢要做的事情：

Response.AddHeader("REFRESH", "2;URL="~/pages/home.aspx");

为什么这不起作用？我如何让它工作？（我知道我可以在网站的其他部分做相对路径，但那是因为它在服务器端运行。）谢谢。

【问题讨论】：

标签： c# .net response.redirect

【解决方案1】：

您需要为 REFRESH 标头指定一个绝对 URL。看看 this post 展示如何从相对 URL 获取绝对 URL（您可以使用那里显示的 ResolveServerUrl）：

Response.AddHeader("REFRESH", "2;url=" + ResolveServerUrl("~/pages/home.aspx"));

供参考：

/// <summary>
/// This method returns a fully qualified absolute server Url which includes
/// the protocol, server, port in addition to the server relative Url.
/// 
/// Works like Control.ResolveUrl including support for ~ syntax
/// but returns an absolute URL.
/// </summary>
/// <param name="ServerUrl">Any Url, either App relative or fully qualified</param>
/// <param name="forceHttps">if true forces the url to use https</param>
/// <returns></returns>
public static string ResolveServerUrl(string serverUrl, bool forceHttps)
{
    // *** Is it already an absolute Url?
    if (serverUrl.IndexOf("://") > -1)
        return serverUrl;

    // *** Start by fixing up the Url an Application relative Url
    string newUrl = ResolveUrl(serverUrl);

    Uri originalUri = HttpContext.Current.Request.Url;
    newUrl = (forceHttps ? "https" : originalUri.Scheme) + 
             "://" + originalUri.Authority + newUrl;

    return newUrl;
} 

/// <summary>
/// This method returns a fully qualified absolute server Url which includes
/// the protocol, server, port in addition to the server relative Url.
/// 
/// It work like Page.ResolveUrl, but adds these to the beginning.
/// This method is useful for generating Urls for AJAX methods
/// </summary>
/// <param name="ServerUrl">Any Url, either App relative or fully qualified</param>
/// <returns></returns>
public static string ResolveServerUrl(string serverUrl)
{
    return ResolveServerUrl(serverUrl, false);
}

【讨论】：