绑定导致 Element 和 UserControl 之间的错误
Binding causing error between Element and UserControl
我的页面中有一个用户控件,它有一个布尔值 属性 我正在尝试将其绑定到切换按钮。但是,我收到一个我不明白的错误。
按钮:
<AppBarToggleButton x:Name="btnFoo"
Icon="Edit"
Checked="btnFoo_Checked"
Unchecked="btnFoo_Checked"/>
该页面中的用户控件:
<local:ucMyControl FooBool="{Binding ElementName=btnFoo, Path=IsChecked}" />
用户控件的 public 属性:
public bool FooBool { get; set; }
初始化该控件时出现此错误,
An exception of type 'Windows.UI.Xaml.Markup.XamlParseException'
occurred in PhoneApp.exe but was not handled in user code
WinRT information: Failed to assign to property '%0'. [Line: 121
Position: 42]
Additional information: The text associated with this error code could
not be found
为什么属性不能设置?我必须使用值转换器吗?
为了将值绑定到 属性,它必须是 DependencyProperty
。
public bool FooBool
{
get { return (bool)GetValue(FooBoolProperty); }
set { SetValue(FooBoolProperty, value); }
}
public static readonly DependencyProperty FooBoolProperty =
DependencyProperty.Register("FooBool", typeof(bool), typeof(ucMyControl), new PropertyMetadata(false));
我的页面中有一个用户控件,它有一个布尔值 属性 我正在尝试将其绑定到切换按钮。但是,我收到一个我不明白的错误。
按钮:
<AppBarToggleButton x:Name="btnFoo"
Icon="Edit"
Checked="btnFoo_Checked"
Unchecked="btnFoo_Checked"/>
该页面中的用户控件:
<local:ucMyControl FooBool="{Binding ElementName=btnFoo, Path=IsChecked}" />
用户控件的 public 属性:
public bool FooBool { get; set; }
初始化该控件时出现此错误,
An exception of type 'Windows.UI.Xaml.Markup.XamlParseException' occurred in PhoneApp.exe but was not handled in user code
WinRT information: Failed to assign to property '%0'. [Line: 121 Position: 42]
Additional information: The text associated with this error code could not be found
为什么属性不能设置?我必须使用值转换器吗?
为了将值绑定到 属性,它必须是 DependencyProperty
。
public bool FooBool
{
get { return (bool)GetValue(FooBoolProperty); }
set { SetValue(FooBoolProperty, value); }
}
public static readonly DependencyProperty FooBoolProperty =
DependencyProperty.Register("FooBool", typeof(bool), typeof(ucMyControl), new PropertyMetadata(false));