ASP.NET - 如何引用不在 app_code 中的类

发布于 2024-07-17 21:34:45 字数 761 浏览 7 评论 0原文

我创建了一个名为 MyMasterPage 的 MasterPage。

public partial class MyMasterPage : System.Web.UI.MasterPage
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
}

我还在 app_code 中创建了一个名为 Class1 的类：

public class Class1
{
    public Class1()
    {
      MyMasterPage m;
    }
}

在 Class1 中，我想引用 MyMasterPage，但收到编译器警告：

The type or namespace name 'MyMasterPage' could not be found (are you missing a using directive or an assembly reference?)

我需要添加哪些代码才能使其正常工作？

这些类位于以下文件夹中：

alt text http://www.yart.com。 au/stackoverflow/masterclass.png

原文

I have created a MasterPage called MyMasterPage.

public partial class MyMasterPage : System.Web.UI.MasterPage
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
}

I have also created a class called Class1 in app_code:

public class Class1
{
    public Class1()
    {
      MyMasterPage m;
    }
}

In Class1 I would like to reference MyMasterPage but I get a compiler warning:

The type or namespace name 'MyMasterPage' could not be found (are you missing a using directive or an assembly reference?)

What code do I need to add to get this to work?

The classes are in folders as follows:

alt text http://www.yart.com.au/stackoverflow/masterclass.png

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花落人断肠 2024-07-24 21:34:45

您将无法引用 MyMasterPage，除非您也将其放在 App_Code 下。通常在这种情况下，您将创建一个继承自 MasterPage 的基本母版页。例如，

public partial class MasterPageBase : System.Web.UI.MasterPage
{
   // Declare the methods you want to call in Class1 as virtual
   public virtual void DoSomething() { }

}

然后在您的实际母版页中，不要从 System.Web.UI.MasterPage 继承，而是从 MasterPageBase 继承。覆盖继承页面中的虚拟方法。

public partial class MyMasterPage : MasterPageBase

在 Class1 中，您需要引用它（我假设您从 Page 类的 MasterPage 属性获取母版页，您的代码将如下所示......

public class Class1
{
    public Class1(Page Target)
    {
      MasterPageBase _m = (MasterPageBase)Target.MasterPage;
      // And I can call my overwritten methods
      _m.DoSomething();
    }
}

这是一个相当冗长的方法，但到目前为止我唯一知道的可以认为在 ASP.NET 模型下这是可行的。

You won't be able to reference MyMasterPage unless you put it under App_Code as well. Normally in such a situation you would create a base master page that inherits from MasterPage. e.g.

public partial class MasterPageBase : System.Web.UI.MasterPage
{
   // Declare the methods you want to call in Class1 as virtual
   public virtual void DoSomething() { }

}

Then in your actual master pages, instead of inheriting from System.Web.UI.MasterPage,inherit from your MasterPageBase. Overwrite the virtual methods in your inheriting pages.

public partial class MyMasterPage : MasterPageBase

In Class1 where you need to refer to it (and I'm assuming you get the master page from a Page class' MasterPage property, your code will look like...

public class Class1
{
    public Class1(Page Target)
    {
      MasterPageBase _m = (MasterPageBase)Target.MasterPage;
      // And I can call my overwritten methods
      _m.DoSomething();
    }
}

It's quite a long winded way but so far the only thing that I can think of that works given the ASP.NET model.

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