XAML 控件与数据模板中的另一个控件绑定！
我在 xaml 中有以下数据模板，这里我在数据模板中有文本框，在普通 XAML 中有按钮，我真正想要的是我想保持按钮处于禁用状态，直到人们在文本框中输入内容？但它不起作用我已经尝试了以下代码
请查看它并帮助我！或者有任何其他方法可以做到这一点让我知道！
<UserControl.Resources>
<DataTemplate x:Key="dataTemplateParameter">
<StackPanel Width="170" Height="Auto" Margin="5">
<TextBlock Width="160" TextAlignment="Left" HorizontalAlignment="Left" Height="22" Text="{Binding Path=ParameterName, Mode=TwoWay}"/>
<TextBox x:Name="txtboxParameter" Width="160" Height="22" HorizontalAlignment="Left" Text="{Binding Path=ParameterValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
</StackPanel>
</DataTemplate>
<Button Grid.Row="6" Name="SearchSourceParamBtn" Content="Search" VerticalAlignment="Bottom" Margin="12,5,92,0" Height="20" Visibility="{Binding SearchSourceBtnVisibility}" Command="{Binding SearchCommand}">
<Button.Style>
<Style TargetType="Button">
<Setter Property="IsEnabled" Value="True"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Text,x:ElementName=txtboxParameter}" Value="">
<Setter Property="IsEnabled" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
谢谢 纳尔斯卡蒂
i have the following datatemplate in xaml and here i have textbox in datatemplate and button in normal XAML, what i really want is that i want to keep button be disabled until person enters something in textbox ? but its not working i have tried the follwing code
Please look into it and help me as well ! or is there any other way to do this let me know !
<UserControl.Resources>
<DataTemplate x:Key="dataTemplateParameter">
<StackPanel Width="170" Height="Auto" Margin="5">
<TextBlock Width="160" TextAlignment="Left" HorizontalAlignment="Left" Height="22" Text="{Binding Path=ParameterName, Mode=TwoWay}"/>
<TextBox x:Name="txtboxParameter" Width="160" Height="22" HorizontalAlignment="Left" Text="{Binding Path=ParameterValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
</StackPanel>
</DataTemplate>
<Button Grid.Row="6" Name="SearchSourceParamBtn" Content="Search" VerticalAlignment="Bottom" Margin="12,5,92,0" Height="20" Visibility="{Binding SearchSourceBtnVisibility}" Command="{Binding SearchCommand}">
<Button.Style>
<Style TargetType="Button">
<Setter Property="IsEnabled" Value="True"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Text,x:ElementName=txtboxParameter}" Value="">
<Setter Property="IsEnabled" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
Thanks
nallskarthi
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您可以通过
来实现这一点
1）将按钮绑定到RelayCommand。那么，
2) 验证命令的 CanExecute 委托中的“ParameterValue”。
编辑：
更好的方法是在 ViewModel 中包含 ParameterValue，但由于某种原因您不会这样做。然后，在VM中创建一个静态ChangeNotifyable属性，使用该属性在CanExecute委托中进行验证。
You can achieve this by
1) binding button to RelayCommand. Then,
2) Validate the "ParameterValue" in command's CanExecute delegate.
Edit:
The better way is to have the ParameterValue in ViewModel, but for some reason you won't do that. Then, create a static ChangeNotifyable property in VM, using this property do the validation in CanExecute delegate.
请验证 Command 对象的 CanExecute 委托中的“ParameterValue”。
Pls Validate the "ParameterValue" in the CanExecute delegate of Command object.