如何自定义WebViewPage执行输出？

Question

I am going to inject some elements in every view of our Asp.Net MVC application. so to do that (I found this: Custom WebViewPage inject code when razor template is rendering answer) I have subclassed the WebViewPage and I have overridden the ExecutePageHierarchy like below:

   public override void ExecutePageHierarchy()
    {
        base.ExecutePageHierarchy();
        string output = Output.ToString();
        if (MyHelper.InitializationRequired)
            output = MyHelper.GetPageHeader() + output + MyHelper.GetPageFooter();
        //--------------
        Response.Clear();
        Response.Write(output);
        Response.End();
    }

by this code we can wrap all of the output markup with some header and some footer elements such as scripts or additional tags which i want to do that.

BUT in this way we lost the Layout completely! because of clearing the response.

my main question is that, how to inject some HTML markups exactly before or exactly after WebViewPage 's output by preserving the content of response which maybe there are some other views or the layout?

Answer 1

您应该使用MVC的布局系统...具有主布局模式的完整功能：=）

Answer 2

Finally i found a trick to do it by this way:

 public override void ExecutePageHierarchy()
    {
        var tmp = OutputStack.Pop();
        var myWriter = new StringWriter();
        OutputStack.Push(myWriter);
        base.ExecutePageHierarchy();

        tmp.Write(
            string.Format("<div> Header of [{0}]</div> {1} <div> Footer of [{0}]</div>",
            VirtualPath,
            myWriter.ToString()));
    }

it works well generally and it wraps the output of view by header and footer. but in my scenario i should able to access to some flags which will assigned on executing view. so i must check them after view execution:

 public override void ExecutePageHierarchy()
    {
        var tmp = OutputStack.Pop();
        var myWriter = new StringWriter();
        OutputStack.Push(myWriter);
        base.ExecutePageHierarchy();
        if (MyHelper.InitializationRequired)
           tmp.Write(
            string.Format("<div> Header of [{0}]</div> {1} <div> Footer of [{0}]</div>",
            VirtualPath,
            myWriter.ToString()));
        else
           tmp.Write(myWriter.ToString());
    }

this approach works well for me. so i posted it, maybe help some one;)