c# - How to pass ContentControl Element to CommandParameter?

Question

I have a toolbar that show many Button with Image and TextBlock.

Then, I create a CommandManager to manager all Button's commands. So, I want to implement a factory to assign action by Button's TextBlock.

This is my xaml and Command function, I try to pass all Button's Text, but I don't know how to do.

<StackPanel>
    <StackPanel.Resources>
        <Style TargetType="{x:Type Button}">
            <Setter Property="Command" Value="{Binding ActionCommand}"/>
            <Setter Property="CommandParameter" Value="{Binding Path=Text}"/>
        </Style>
    </StackPanel.Resources>
    <Button>
        <StackPanel>
            <Image Source="/Resources/ToolBar/open.png"/>
            <TextBlock Text="Open"/>
        </StackPanel>
    </Button>
    <Button>
        <StackPanel>
            <Image Source="/Resources/ToolBar/save.png"/>
            <TextBlock Text="Save"/>
        </StackPanel>
    </Button>
</StackPanel>

ActionManager:

public ICommand ActionCommand { get { return new RelayCommand(_onActionCommand); } }

private void _onActionCommand(object parameter)
{
    if (parameter == null)
    {
        return;
    }

    string buttonContent = parameter as string;
    switch (buttonContent)
    {
        case "Open":
            new OpenWindow().ShowDialog();
            break;
        case "Open":
            new Save();
            break;
    }
}

score 1 · Accepted Answer

AButton没有“文本”的概念，但您可以将Tag属性设置为 astring并传递这个：

<StackPanel>
    <StackPanel.Resources>
        <Style TargetType="{x:Type Button}">
            <Setter Property="Command" Value="{Binding ActionCommand}"/>
            <Setter Property="CommandParameter" Value="{Binding Path=Tag, RelativeSource={RelativeSource Self}}"/>
        </Style>
    </StackPanel.Resources>
    <Button Tag="Open">
        <StackPanel>
            <Image Source="/Resources/ToolBar/open.png"/>
            <TextBlock Text="Open"/>
        </StackPanel>
    </Button>
    <Button Tag="Save">
        <StackPanel>
            <Image Source="/Resources/ToolBar/save.png"/>
            <TextBlock Text="Save"/>
        </StackPanel>
    </Button>
</StackPanel>

score 0 · Accepted Answer

我会这样做：

<Button Tag="AnyUniqueString">

并将命令绑定到它

<Setter Property="CommandParameter" Value="{Binding Path=Tag}"/>

所以你没有链接到文本按钮（你可以翻译它） - 但要注意，使用一个命令，你将无法管理刷新和 can_execute ，这将启用/禁用你的按钮。将每个按钮绑定到单独的命令可能并不复杂......？

我在我的解决方案CBR中这样使用它

<StackPanel Margin="10,0,10,0" Orientation="Vertical">
                <Button Style="{DynamicResource CbrStandardButton}" Margin="2,10,2,10"
                        Command="{Binding ForwardCommand}" CommandParameter="CatalogNewCommand" >
                    <DockPanel Margin="10">
                        <Image Source="/CBR;component/Resources/Images/32x32/library_new.png" Width="32"></Image>
                        <Label Style="{DynamicResource CbrLabel}"
                               Content="{LocalizationExtension ResModul=CBR, Key=HomeView.LblActionNew, DefaultValue=Start a new library}" />
                    </DockPanel>
                </Button>
                <Button Style="{DynamicResource CbrStandardButton}" Margin="2,10,2,10"
                        Command="{Binding ForwardCommand}" CommandParameter="BookOpenCommand" >
                    <DockPanel Margin="10">
                        <Image Source="/CBR;component/Resources/Images/32x32/book/book_read.png" Width="32"></Image>
                        <Label Style="{DynamicResource CbrLabel}"
                               Content="{LocalizationExtension ResModul=CBR, Key=HomeView.LblActionRead, DefaultValue=Read a book}" />
                    </DockPanel>
                </Button>
                <Button Style="{DynamicResource CbrStandardButton}" Margin="2,10,2,10"
                        Command="{Binding ForwardCommand}" CommandParameter="SysHelpCommand">
                    <DockPanel Margin="10">
                        <Image Source="/CBR;component/Resources/Images/32x32/book_type/book_type_xps.png" Width="32"></Image>
                        <Label Style="{DynamicResource CbrLabel}"
                               Content ="{LocalizationExtension ResModul=CBR, Key=HomeView.LblActionTutorial, DefaultValue=Quick start tutorial}" />
                    </DockPanel>
                </Button>
            </StackPanel>

score 0 · Accepted Answer

你可以使用这个标记扩展：

https://www.codeproject.com/Articles/456589/Bindable-Converter-Parameter

它允许您将命令参数绑定到 xaml 属性。因此，例如，您可以在按钮的标签字段中放置一些标识符，并使用扩展名将其绑定到命令参数。这样，您只使用一个命令，只使用一个绑定，并且您获得了区分命令处理程序中的按钮所需的一切。

希望能帮助到你

c# - How to pass ContentControl Element to CommandParameter?

3 回答 3

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