嵌套母版页以编程方式更改
我有一个具有如下结构的页面：
PAGE = MASTER PAGE A + nested MASTER PAGE B of A
MASTER PAGE A:
-----------
Header
-----------
BODY
-----------
Footer
-----------
MASTER PAGE B:
BODY-------------------------------
| | |
ColumLeft | Content | ColumRight |
| | |
-----------------------------------
我需要开发的功能之一是能够以编程方式更改嵌套的 MASTER PAGE。 例如，将母版页 B 更改为 C（包含不同的布局，例如仅 2 列），保持页眉和页脚集中。
目前，在页面上，我使用此代码来选择另一个 MP，但我无法执行此操作，因为在选择新的嵌套页面时，asp.net 似乎松散了对主页面 A 的引用。
void Page_PreInit(Object sender, EventArgs e)
{
this.MasterPageFile = "~/NewMaster.master";
}
问题：
- 知道如何解决吗它？
- 只有一个母版页（1 级）并包含页眉和页脚以及其他技术会更好吗？如果是的话你会建议我什么？
I have a PAGE with a structure like this:
PAGE = MASTER PAGE A + nested MASTER PAGE B of A
MASTER PAGE A:
-----------
Header
-----------
BODY
-----------
Footer
-----------
MASTER PAGE B:
BODY-------------------------------
| | |
ColumLeft | Content | ColumRight |
| | |
-----------------------------------
One of the features I need to develop is to be able to change the nested MASTER PAGE programmatically.
For example changing MASTER PAGE B with C (containing a different layout like just 2 columns) maintaining the Header and Footer centralized.
At the moment on PAGE I use this code to select another MP, but I am not able to do it because seems when selecting a new nested page asp.net loose the reference to the main MASTER PAGE A.
void Page_PreInit(Object sender, EventArgs e)
{
this.MasterPageFile = "~/NewMaster.master";
}
Questions:
- Any idea how to solve it?
- Would be better have only a Master Page (1 Level) and include the Header and Footer with another tecnic? If yes what would you suggest me?
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评论（2）
为了以编程方式更改 MasterPage，您必须在 xml/html 页面中的页面注册链接之后指定其类型。
我不建议使用这种架构来实现您想要实现的目标，但这就是您要做的。
In order to change the MasterPage programmatically you have to specify its type right after the page registration link in the xml/html page.
I don't recommend using this architecture to achieve what you want to achieve, but this is how you would do it.
在这种情况下，我不会使用嵌套母版页，而只使用一个母版页。对于列，我将使用 RenderPartial 或 RenderAction。它并不像您希望的那样干燥，因为您需要在每个视图中添加 RenderPartial("LeftColumn") ，所以我理解您的问题，但这就是我这样做的方式。
注意：RenderAction 在 MVC 中可用。有关它的文章，请参阅例如：
http://haacked.com/archive/2009/11/18 /aspnetmvc2-render-action.aspx
In this case I wouldn't use nested masterpages, but just one masterpage. For the columns I would use RenderPartial or RenderAction. It's not as DRY as you would wish, because you need to add RenderPartial("LeftColumn") in every view, so I understand your problem, but this is the way I do it.
NB: RenderAction is availbale in MVC. For an article about it see e.g.:
http://haacked.com/archive/2009/11/18/aspnetmvc2-render-action.aspx