[英]Adding Properties to Custom WPF Control?
我今天早上剛剛開始WPF,所以這是(希望)一個容易解決的問題。 我開始創建一個具有漸變背景的按鈕。 我想在控件的屬性中聲明漸變開始和結束顏色,然后將它們應用到模板中。 我在編譯代碼時遇到了麻煩。 我得到的例外是xaml告訴我屬性不可訪問但是當我將visiblity修飾符改為public時它抱怨它無法找到靜態屬性...
到目前為止,這是我的xaml:
<StackPanel>
<StackPanel.Resources>
<Style TargetType="my:GradientButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type my:GradientButton}">
<Grid>
<Ellipse Width="{TemplateBinding Width}" Height="{TemplateBinding Height}" Stroke="{TemplateBinding Foreground}" VerticalAlignment="Top" HorizontalAlignment="Left">
<Ellipse.Fill>
<LinearGradientBrush>
<GradientStop Color="{TemplateBinding GradientStart}" Offset="0"></GradientStop><!--Problem on this line!!!-->
<GradientStop Color="{TemplateBinding GradientEnd}" Offset="1"></GradientStop>
</LinearGradientBrush>
</Ellipse.Fill>
</Ellipse>
<Polygon Points="18,12 18,38, 35,25" Fill="{TemplateBinding Foreground}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</StackPanel.Resources>
<my:GradientButton x:Name="btnPlay" Height="50" Width="50" Foreground="Black" Click="Button_Click" GradientStart="#CCCCCC" GradientEnd="#7777777" />
</StackPanel>
這是我的自定義控件的代碼:
public class GradientButton : Button
{
static DependencyProperty GradientStartProperty;
static DependencyProperty GradientEndProperty;
static GradientButton()
{
GradientStartProperty = DependencyProperty.Register("GradientStart", typeof(Color), typeof(GradientButton));
GradientEndProperty = DependencyProperty.Register("GradientEnd", typeof(Color), typeof(GradientButton));
}
public Color GradientStart
{
get { return (Color)base.GetValue(GradientStartProperty); }
set { base.SetValue(GradientStartProperty, value); }
}
public Color GradientEnd
{
get { return (Color)base.GetValue(GradientEndProperty); }
set { base.SetValue(GradientEndProperty, value); }
}
}
編輯:這是我得到的設計時例外
Cannot reference the static member 'GradientStartProperty' on the type 'GradientButton' as it is not accessible.
我想通了......這個:
static DependencyProperty GradientStartProperty;
static DependencyProperty GradientEndProperty;
需要改為:
public static DependencyProperty GradientStartProperty;
public static DependencyProperty GradientEndProperty;
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