mahapps.metro TextBoxHelper.ButtonCommand在使用SimpleCommand时未激

本文关键字：SimpleCommand metro TextBoxHelper ButtonCommand mahapps | 更新日期: 2023-09-27 18:24:16

我正试图启动SearchMetroTextBox TextBoxHelper.ButtonCommand事件，但没有成功。以下是我采取的步骤。

  1. 在Demo应用程序中，我构建了MahApps.Metro.Resources.dll并引用了它。

  2. 从mahabs.metro的Demo应用程序中，我复制了以下类：

    公共类SimpleCommand:ICommand
    ｛
    …实施
    }

  3. 我不想要搜索图标，而是一个文件浏览图标，所以我制作了以下样式：

        <Style x:Key="BrowseMetroTextBox" TargetType="{x:Type TextBox}" BasedOn="{StaticResource SearchMetroTextBox}">
        <Style.Triggers>
            <Trigger Property="Controls:TextBoxHelper.HasText" Value="False">
                <Setter Property="Controls:TextBoxHelper.Watermark" Value="Select save location..." />
            </Trigger>
        </Style.Triggers>
        <Setter Property="Controls:TextBoxHelper.ButtonTemplate">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Grid Background="{TemplateBinding Background}">
                        <Grid x:Name="contentPresenter"
                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                            Margin="{TemplateBinding Padding}"
                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                            SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                            Opacity="0.75">
                            <Canvas Width="15" Height="15" Clip="F1 M 0,0L 76,0L 76,76L 0,76L 0,0">
                                <!-- x:Key="appbar_folder_ellipsis"-->
                                <Path Width="15.7781" Height="15.7781" Stretch="Fill" Fill="{DynamicResource AccentColorBrush}" Data="F1 M 21,30.0001L 55.9999,30.0001L 55.9999,50L 21,50L 21,30.0001 Z M 52,28L 37,28C 38,25 39.4999,24.0001 39.4999,24.0001L 50.75,24C 51.3023,24 52,24.6977 52,25.25L 52,28 Z M 53.5,52C 54.8807,52 56,53.1193 56,54.5C 56,55.8807 54.8807,57 53.5,57C 52.1193,57 51,55.8807 51,54.5C 51,53.1193 52.1193,52 53.5,52 Z M 46.5,52C 47.8807,52 49,53.1193 49,54.5C 49,55.8807 47.8807,57 46.5,57C 45.1193,57 44,55.8807 44,54.5C 44,53.1193 45.1193,52 46.5,52 Z M 39.5,52C 40.8807,52 42,53.1193 42,54.5C 42,55.8807 40.8807,57 39.5,57C 38.1193,57 37,55.8807 37,54.5C 37,53.1193 38.1193,52 39.5,52 Z " />
                            </Canvas>
                        </Grid>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsPressed" Value="True">
                            <Setter Property="Foreground" Value="{DynamicResource WhiteBrush}" />
                            <Setter Property="Background" Value="{DynamicResource AccentColorBrush}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

  4. 从Demo应用程序中，我复制了TextBoxButtonCmdWithParameter，并将其重命名为FileBrowseCommand。

  5. 我创建了以下文本框（注意，一个是我的浏览文本框，另一个是标准搜索文本框）：

    <TextBox HorizontalAlignment="Stretch" Height="23" VerticalAlignment="Top" Margin="10,26,10,0" Name="employeeLocation"
         Controls:TextBoxHelper.ButtonCommand="{Binding FileBrowseCommand, Mode=OneWay}"
         Controls:TextBoxHelper.ButtonCommandParameter="{Binding ElementName=employeeLocation, Path=Text}" 
         Style="{StaticResource BrowseMetroTextBox}"/>
<TextBox HorizontalAlignment="Stretch" Height="23" VerticalAlignment="Top" Margin="10,83,10,0" Name="adminLocation"
         Controls:TextBoxHelper.ButtonCommand="{Binding FileBrowseCommand, Mode=OneWay}"
         Controls:TextBoxHelper.ButtonCommandParameter="{Binding ElementName=adminLocation, Path=Text}" 
         Style="{StaticResource SearchMetroTextBox}"/>

但是，当我单击搜索或浏览按钮时，我从未命中事件处理程序。我还缺少什么吗？

mahapps.metro TextBoxHelper.ButtonCommand在使用SimpleCommand时未激

我遇到了同样的问题，我通过将Controls:TextBoxHelper.ButtonCommand更改为文本框中的嵌套元素来解决它：

<Controls:TextBoxHelper.ButtonCommand>
    <Binding Path="FileBrowseCommand" Mode="OneWay" />
</Controls:TextBoxHelper.ButtonCommand>`

如果绑定到文本框按钮的命令没有正确的类型，就会发生这种情况。它需要将Textbox作为输入参数。此外，Textbox必须来自System.Windows.Controls，而不是System.Windows.Forms。当在数据上下文中定义时，以下内容应该有效：

public ReactiveCommand<System.Windows.Controls.TextBox, Unit> YourCommandName { get; private set; }
YourCommandName = ReactiveCommand.Create((System.Windows.Controls.TextBox textBox) =>
{
   // your command code
});
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