WPF DependencyProperty 在 UserControl 中公开?
我有一个 UserControl,我想要一些自定义参数“radius”(double)和“contentSource”(string[])。
我的 UserControl 由一些嵌套控件组成:
<UserControl ...>
<Grid>
<my:Menu ...>
<my:Button>
</my:Button>
<my:Button>
</my:Button>
<my:Button>
</my:Button>
</my:Menu ...>
</Grid>
我试图通过以下方式公开参数:
public double Rad
{
get { return (double)GetValue(RadProperty); }
set { SetValue(RadProperty, value); }
}
public static readonly DependencyProperty RadProperty =
DependencyProperty.Register(
"Radius",
typeof(double),
typeof(Menu));
public String[] DataSource
{
get { return (String[])GetValue(DataSourceProperty); }
set { SetValue(DataSourceProperty, value); }
}
public static readonly DependencyProperty DataSourceProperty =
DependencyProperty.Register(
"DataSource",
typeof(String[]),
typeof(Menu));
但是,似乎有两个问题,“string[]”参数似乎导致崩溃,但大多数情况下,我根本无法设置“Radius”属性。我还需要做些什么来公开参数吗?
I have a UserControl where I'd like to have some parameters of customization "radius"(double) and "contentSource" (string[]).
My UserControl is composed of a few nested controls:
<UserControl ...>
<Grid>
<my:Menu ...>
<my:Button>
</my:Button>
<my:Button>
</my:Button>
<my:Button>
</my:Button>
</my:Menu ...>
</Grid>
I'm trying to expose the parameters with:
public double Rad
{
get { return (double)GetValue(RadProperty); }
set { SetValue(RadProperty, value); }
}
public static readonly DependencyProperty RadProperty =
DependencyProperty.Register(
"Radius",
typeof(double),
typeof(Menu));
public String[] DataSource
{
get { return (String[])GetValue(DataSourceProperty); }
set { SetValue(DataSourceProperty, value); }
}
public static readonly DependencyProperty DataSourceProperty =
DependencyProperty.Register(
"DataSource",
typeof(String[]),
typeof(Menu));
However, there seems to be two problems, the "string[]" parameter seems to be causing crashes, but mostly, I cannot set the "Radius" property at all. Is there something else I need to do to expose the parameter?
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您如何尝试访问这些值?我已将您的代码复制到用户控件中,它似乎工作正常。您是否为要从中访问这些值的对象设置了 DataContext?
这是我的测试代码,可能会有所帮助:
以及 XAML:
How are you trying to access the values? I have copied your code into a UserControl and it seems to work fine. Have you set the DataContext for the object you are accessing these values from?
Here is my test code, which might help:
and the XAML: