如何使用 Microsoft Unity 2.0 将依赖项注入页面类？

发布于 2024-12-05 02:45:46 字数 997 浏览 1 评论 0原文

我有一个具有以下属性的页面：

    public partial class CustomPage : Page
{
    [Dependency]
    public ILogger Logger { get; set; }

    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write((this.Logger == null) ? "Not initialized" : "Initialized");
    }
}

可以看出，ILogger 是一个依赖项，应该注入到此类中。

Unity 配置文件的配置如下：

<unity>
  <alias alias="ILogger" type="Logging.ILogger, AssemblyName" />
  <alias alias="Logger" type="Logging.Logger, AssemblyName" /> 
  <container>
    <register type="ILogger" mapTo="Logger">
      <lifetime type="singleton"/>
    </register>   
  </container>
</unity>

在我的 Global.ascx 文件中，Application_Start 事件我有以下代码：

var container = new UnityContainer();
container.LoadConfiguration();
container.Resolve<CustomPage>();

我期望的是，当 CustomPage 运行时，ILogger 会被注入，但实际行为是它始终为空。

如何正确配置呢？

谢谢

原文

I have a page with the below property:

    public partial class CustomPage : Page
{
    [Dependency]
    public ILogger Logger { get; set; }

    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write((this.Logger == null) ? "Not initialized" : "Initialized");
    }
}

As can be seen, the ILogger is a dependency which should be injected to this class.

The Unity config file has been configured like this:

<unity>
  <alias alias="ILogger" type="Logging.ILogger, AssemblyName" />
  <alias alias="Logger" type="Logging.Logger, AssemblyName" /> 
  <container>
    <register type="ILogger" mapTo="Logger">
      <lifetime type="singleton"/>
    </register>   
  </container>
</unity>

In my Global.ascx file, Application_Start event I have the below code:

var container = new UnityContainer();
container.LoadConfiguration();
container.Resolve<CustomPage>();

What I expect is that when the CustomPage runs, the ILogger get injected but the actual behaviour is that it's always null.

How to configure it properly?

Thanks

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简美 2024-12-12 02:45:47

我创建了一个基页面类，其中属性依赖注入发生在 Page_PreInit 上：

public class BasePage<T> : Page where T: class
{
    [Dependency]
    public ILogger Logger { get; set; }

    protected void Page_PreInit(object sender, EventArgs args)
    {
        ((IContainerAccessor)HttpContext.Current.ApplicationInstance).Container.BuildUp<T>(this as T);
    }
    }

不需要有单独的处理程序。

I created a base page class where the property dependency injection happens on Page_PreInit:

public class BasePage<T> : Page where T: class
{
    [Dependency]
    public ILogger Logger { get; set; }

    protected void Page_PreInit(object sender, EventArgs args)
    {
        ((IContainerAccessor)HttpContext.Current.ApplicationInstance).Container.BuildUp<T>(this as T);
    }
    }

No need to have a separate handler.

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