尝试让 IsEnabled 绑定到依赖属性
知道我的这段代码哪里出了问题吗？我希望在选择关联的单选按钮时启用文本框，然后在选择不同的单选按钮时我希望它启用=False。我创建了一个 ProxyMode 依赖属性，并更改了 getter 以根据是否选择 Proxy 来获取它的 bool 值。似乎不起作用...有什么想法吗？
// Proxy Host Name
public string Proxy
{
get { return (string)GetValue(ProxyProperty); }
set { SetValue(ProxyProperty, value); }
}
public static readonly DependencyProperty ProxyProperty =
DependencyProperty.Register("Proxy", typeof(string), typeof(ConfigWindowViewModel), new UIPropertyMetadata("[e.g. proxy.mycompany.com]"));
public bool ProxyMode
{
get { return Proxy == "Proxy"; }
set { SetValue(ProxyModeProperty, value); }
}
public static readonly DependencyProperty ProxyModeProperty =
DependencyProperty.Register("ProxyMode", typeof(bool), typeof(ConfigWindowViewModel));
和 XAML
<StackPanel Grid.Column="0" Margin="2">
<StackPanel Orientation="Horizontal" VerticalAlignment="Center">
<RadioButton IsChecked="{Binding Path=Mode, Converter={StaticResource enumBooleanConverter}, ConverterParameter=Proxy}"
VerticalAlignment="Center"
Padding="2,0,10,0">Proxy
</RadioButton>
<TextBox Text="{Binding Path=Proxy}"
IsEnabled="{Binding Path=ProxyMode}"
Width="Auto"
Name="ProxyHostTextBox"
VerticalAlignment="Center"
MinWidth="150"
/>
</StackPanel>
<RadioButton IsChecked="{Binding Path=Mode, Converter={StaticResource enumBooleanConverter}, ConverterParameter=Direct}">Direct</RadioButton>
</StackPanel>
Any idea where I'm going wrong with this code. I want the TextBox to be Enabled when the associated RadioButton for it is selected, and then when a different radio button is selected I want it to be Enabled=False. I created a ProxyMode dependency property and have changed the getter to obtain it's bool value based on whether Proxy is selected or not. Doesn't seem to work...any ideas?
// Proxy Host Name
public string Proxy
{
get { return (string)GetValue(ProxyProperty); }
set { SetValue(ProxyProperty, value); }
}
public static readonly DependencyProperty ProxyProperty =
DependencyProperty.Register("Proxy", typeof(string), typeof(ConfigWindowViewModel), new UIPropertyMetadata("[e.g. proxy.mycompany.com]"));
public bool ProxyMode
{
get { return Proxy == "Proxy"; }
set { SetValue(ProxyModeProperty, value); }
}
public static readonly DependencyProperty ProxyModeProperty =
DependencyProperty.Register("ProxyMode", typeof(bool), typeof(ConfigWindowViewModel));
And the XAML
<StackPanel Grid.Column="0" Margin="2">
<StackPanel Orientation="Horizontal" VerticalAlignment="Center">
<RadioButton IsChecked="{Binding Path=Mode, Converter={StaticResource enumBooleanConverter}, ConverterParameter=Proxy}"
VerticalAlignment="Center"
Padding="2,0,10,0">Proxy
</RadioButton>
<TextBox Text="{Binding Path=Proxy}"
IsEnabled="{Binding Path=ProxyMode}"
Width="Auto"
Name="ProxyHostTextBox"
VerticalAlignment="Center"
MinWidth="150"
/>
</StackPanel>
<RadioButton IsChecked="{Binding Path=Mode, Converter={StaticResource enumBooleanConverter}, ConverterParameter=Direct}">Direct</RadioButton>
</StackPanel>
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评论（3）
根据是否选中代理 RadioButton 来启用/禁用文本框的最简单方法是将 TextBox 的 IsEnabled 属性直接绑定到代理 RadioButton 的 IsChecked 属性。假设代理 RadioButton 被命名为“proxy”：
如果您打算链接 RadioButton 控件以便一次只能选择一个，则需要将两个 RadioButton 的 GroupName 属性设置为相同的值（对于所有链接的 RadioButton 控件）。
如果您还有其他问题，请告诉我。
The easiest way to enable/disable the textbox based on whether the proxy RadioButton is checked is to bind the IsEnabled property of the TextBox directly to the IsChecked property of the proxy RadioButton. Assuming the proxy RadioButton is named "proxy":
If you meant for your RadioButton controls to be linked so that only one can be selected at once, you need to set the GroupName property to something on both of them (it should be the same for all linked RadioButton controls).
Let me know if you have further questions.
与这个问题的第二个版本一样：
As with the second version of this question:
我认为我想出了一种更好的方法来做到这一点 - 所以这个问题可能不是一个好问题 - 以下没有依赖属性的似乎可以
think I came up with a better way to do this - so the question probably isn't a good one to ask - the following without dependency property seem ok