如何从我的MasterPage的ContentPlaceholder中的页面访问属性 [英] How do I access properties from page in ContentPlaceholder in my MasterPage

问题描述

我有以下环境:

• 具有contentPlacholder的母版页
• 使用此母版页并实现基本类(fooPage)的多个页面
• fooPage具有特定属性(fooProperty)

• masterpage with a contentPlacholder
• multiple pages which use this masterpage and implement a base-class (fooPage)
• fooPage has a certain property (fooProperty)

现在我想做类似的事情

public partial class FooMaster : System.Web.UI.MasterPage
{
    // this is originally from the designer-file
    protected global::System.Web.UI.WebControls.ContentPlaceHolder ContentPlaceHolder;

    protected override void OnPreRender(System.EventArgs e)
    {
        var fooPageInstance = this.ContentPlaceHolder as fooPage;
        var fooPropertyInstance = fooPageInstance.fooProperty;
        // TODO do something with the property
    }
}

显然这行不通-但是我怎么能做到这一点?

Obviously this is not going to work - but how can I achieve this?

我知道另一种选择:使用fooProperty作为参数从contentPage中的masterPage调用一个方法-但在这种情况下，我想拥有一个拉式系统...

I know the alternative: call a method from the masterPage in the contentPage with fooProperty as a parameter - but i would like to rather have a pull-system in this case...

推荐答案

public partial class FooMaster : System.Web.UI.MasterPage
{
    // this is originally from the designer-file
    protected global::System.Web.UI.WebControls.ContentPlaceHolder ContentPlaceHolder;

    protected override void OnPreRender(System.EventArgs e)
    {
        var fooPageInstance = this.ContentPlaceHolder.BindingContainer as FooPage;
        var fooPropertyInstance = fooPageInstance.fooProperty;
        // TODO do something with the property
    }
}

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