WPF Win7和Win10 TextBox 使能false时，背景色属性触发不生效问题

        最近做一个WPF项目，添加一个自定义的整数加减控件，该控件分为三部分，左边是“数值减”，中间是TextBox输入框显示数值、右边是“数值加”；效果图入下图所示。

问题：在Win7系统下，设置该控件使能为False时，TextBox背景色变成白色，样式里面写的触发器不生效；

          在Win10系统下，设置该控件IsEnabled="False"时，颜色变化更改正常显示；

故编写该文章，以便以后遇到此类问题，能有点作用。

部分界面xaml代码如下：

<Style TargetType="{x:Type local:NumBntText}"><Setter Property="FontSize" Value="14"/><Setter Property="Template"><Setter.Value><ControlTemplate TargetType="{x:Type local:NumBntText}"><Border CornerRadius="5" BorderThickness="0,0,0,0" BorderBrush="{DynamicResource border_color}" Background="{DynamicResource Backgr_color}" Focusable="False"><Grid Width="{TemplateBinding Width}"><Grid.ColumnDefinitions><ColumnDefinition Width="auto"/><ColumnDefinition/><ColumnDefinition Width="auto"/></Grid.ColumnDefinitions><Button x:Name="nbtnminus" Grid.Column="0" Width="35" Content="-" Style="{StaticResource Button_Text}" BorderBrush="LightBlue"/><TextBox Grid.Column="1" VerticalAlignment="Center" VerticalContentAlignment="Center" BorderThickness="0" Name="textBox" TextAlignment="Center" Background="Transparent" Foreground="{DynamicResource textblock_txt}"Text="{Binding Number,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource TemplatedParent}}""/><Button x:Name="nbtn" Grid.Column="2" Width="35" Content="+" Style="{StaticResource Button_TextTwo}" BorderBrush="LightBlue"/></Grid></Border><ControlTemplate.Triggers><Trigger Property="IsEnabled" Value="False"><Setter Property="Background" Value="{DynamicResource Backgr_color}"/><Setter Property="Foreground" Value="{DynamicResource textblock_txt}"/><Setter TargetName="textBox" Property="Background" Value="{DynamicResource Backgr_color}"/></Trigger></ControlTemplate.Triggers></ControlTemplate></Setter.Value></Setter>
</Style>

解决：删除触发器代码 并且 改写TextBox控件模板即可解决该问题；       

改写 TextBox 模板代码示例：

<Style TargetType="{x:Type TextBox}"><Setter Property="FontSize" Value="14"/><Setter Property="Background" Value="{DynamicResource Backgr_color}"/><Setter Property="Foreground" Value="{DynamicResource textblock_txt}"/><Setter Property="Template"><Setter.Value><ControlTemplate TargetType="TextBox"><Border Name="Bd" BorderThickness="{TemplateBinding BorderThickness}"  BorderBrush="{TemplateBinding BorderBrush}"  Background="{TemplateBinding Background}" SnapsToDevicePixels="true"><ScrollViewer Name="PART_ContentHost" Background="{TemplateBinding Background}" Foreground="{TemplateBinding Foreground}" FontSize="{TemplateBinding FontSize}"   SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" FontFamily="{TemplateBinding FontFamily}" /></Border><ControlTemplate.Triggers><Trigger Property="IsEnabled" Value="False"><Setter Property="Background" Value="{DynamicResource Backgr_color}"/><Setter Property="Foreground" Value="{DynamicResource textblock_txt}"/><Setter TargetName="PART_ContentHost" Property="Background" Value="{DynamicResource Backgr_color}"/></Trigger></ControlTemplate.Triggers></ControlTemplate></Setter.Value></Setter>
</Style>