[英]Xaml inside ContentControl and binding to DependencyProperty
I have two questions about developing at Windows Phone: 关于在Windows Phone上进行开发,我有两个问题:
I want to create custom control and be able to provide some extra XAML inside it. 我想创建自定义控件,并能够在其中提供一些额外的XAML。 So I use
ContentControl
with ContentPresenter
inside ControlTemplate
. 所以我将
ContentControl
与ControlTemplate
内部的ContentPresenter
一起使用。
<ContentControl>
<ControlTemplate>
<TextBlock Name="TextBlockControl" Text="Existing controls"/>
<ContentPresenter/>
</ControlTemplate>
</ContentControl>
It worked, but I can't access TextBlockControl
inside ControlTemplate
from code-behind. 它有效,但是我无法从代码隐藏访问
ControlTemplate
内部的TextBlockControl
。 FindName
always returns null. FindName
始终返回null。
Secondly, I want to provide attributes for Control, so I create DependencyProperty like this: 其次,我想为控件提供属性,因此我创建了DependencyProperty,如下所示:
public string CustomText
{
get { return (string)GetValue(CustomTextProperty); }
set
{
SetValue(CustomTextProperty, value);
TextBlockControl.Text = value;
}
}
public static readonly DependencyProperty CustomTextProperty =
DependencyProperty.Register("CustomText", typeof(string), typeof(MyControl), null);
As you can see, I write TextBlockControl.Text = value;
如您所见,我编写了
TextBlockControl.Text = value;
to set text for TextBlock inside of my Control. 在我的控件内设置TextBlock的文本。 When I set static string - it works
当我设置静态字符串时-它起作用
<MyControl CustomText="Static Text"/>
But when I want to use Binding
(eg for LocalizedStrings
resource) - it doesn't work. 但是,当我想使用
Binding
(例如,针对LocalizedStrings
资源)时,它不起作用。 Am i missing PropertyMeta Callback, or some IPropertyChanged inheritance? 我是否缺少PropertyMeta回调或某些IPropertyChanged继承? I have read tons of StackOverflow questions with the same issue, but nothing answered my questions.
我已经读过很多关于同一问题的StackOverflow问题,但是没有任何问题可以回答我的问题。
the answer to the first question : 第一个问题的答案:
If you créate your custom-control, and you assign a template, you can Access to the elements in that template using : 如果创建自定义控件并分配了模板,则可以使用以下命令访问该模板中的元素:
[TemplatePart(Name = "TextBlockControl", Type = typeof(FrameworkElement))]
You have to put this attribute in order to tools like blend, know that the template for this custom-control has to have a textblock called TextBlockControl.Then from the control's OnApplyTemplate you should get a reference to it whit : 您必须将此属性放入混合等工具,知道此自定义控件的模板必须具有一个称为TextBlockControl的文本块,然后从控件的OnApplyTemplate中可以引用它:
protected override void OnApplyTemplate()
{
_part1 = this.GetTemplateChild("TextBlockControl") as FrameworkElement;
base.OnApplyTemplate();
}
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