c# - 如何在输出之前修改整个 ASP.NET 页面内容？

Question

我有一个页面，上面有一堆用户控件。我希望能够在将在我的代码中替换的内容中直接包含“宏”或“占位符”。这应该没什么关系，但我正在使用 Ektron 作为我的 CMS。

在将整个呈现的页面内容发送给客户端之前，是否有任何我可以 Hook 的页面事件来对整个呈现的页面内容进行字符串替换？

更新

这是我目前用来完成此任务的代码:

protected override void Render(HtmlTextWriter writer)
{
    string content = string.Empty;

    using (var stringWriter = new StringWriter())
    using (var htmlWriter = new HtmlTextWriter(stringWriter))
    {
        // render the current page content to our temp writer
        base.Render(htmlWriter);
        htmlWriter.Close();

        // get the content
        content = stringWriter.ToString();
    }

    // replace our placeholders
    string newContent = content.Replace("$placeholder1$", "placeholder1 data").Replace("$placeholder2$", "placeholder2 data");

    // write the new html to the page
    writer.Write(newContent);
}

Answer 1

您是否尝试过覆盖渲染方法？

protected override void Render(HtmlTextWriter writer)
{
   StringBuilder htmlString = new StringBuilder(); // this will hold the string
   StringWriter stringWriter = new StringWriter(htmlString);
   HtmlTextWriter tmpWriter = new HtmlTextWriter(stringWriter);
   Page.Render(tmpWriter);
   writer.Flush();

   writer.Write(DoReplaceLogic(htmlString.ToString()););
}