我的WPF应用程序中有一个刷新按钮附加到命令
<ToolBar>
<Button Command="{Binding RefreshCommand}">
<Viewbox Width="16" Height="16">
<Rectangle Width="16" Height="16">
<Rectangle.Fill>
<DrawingBrush>
<DrawingBrush.Drawing>
<DrawingGroup>
<DrawingGroup.Children>
<GeometryDrawing Brush="#00FFFFFF" Geometry="F1M16,16L0,16 0,0 16,0z" />
<GeometryDrawing Brush="#FFF6F6F6" Geometry="F1M16,8C16,12.411 12.411,16 8,16 3.589,16 0,12.411 0,8 0,6.597 0.384,5.212 1.088,4L0,4 0,0 8,0 8,8 4,8C4,10.206 5.794,12 8,12 10.206,12 12,10.206 12,8 12,6.656 11.331,5.41 10.21,4.666L9.377,4.112 11.592,0.78 12.425,1.333C14.663,2.822,16,5.314,16,8" />
<GeometryDrawing Brush="#FF00529C" Geometry="F1M15,8C15,11.859 11.859,15 8,15 4.14,15 1,11.859 1,8 1,6.076 1.801,4.292 3.121,3L1,3 1,1 7,1 7,7 5,7 5,4.002C3.766,4.931 3,6.401 3,8 3,10.757 5.243,13 8,13 10.757,13 13,10.757 13,8 13,6.321 12.164,4.763 10.764,3.833L11.871,2.167C13.83,3.469,15,5.649,15,8" />
</DrawingGroup.Children>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
</Rectangle.Fill>
</Rectangle>
</Viewbox>
</Button>
</ToolBar>
问题是,如果由于应用程序状态检查失败而导致RefreshCommand不可用,则图标不会发生任何变化(如果我使用文本代替图标,则可以无缝地处理条上灰显的项目,而不需要任何额外的代码。
碰巧的是,我确实有一个XAML片段,我想要用于灰显的isEnabled=false状态,我只需要知道如何告诉它使用上面的片段,图标应用于isEnabled=true状态,并将另一个片段应用于false。(对不起,这个问题看起来很差劲。WPF对我来说相对较新)。
由于此图标来自VS图像库,因此我还将它们表示为bmp和png格式。在xaml中绘制它并不是必需的。
为了完整起见,下面是我想要在它不可用时替换它的代码片段。我现在注意到它只有一行不同,所以这可能会让事情变得更容易(我希望)
<Viewbox Width="16" Height="16">
<Rectangle Width="16" Height="16">
<Rectangle.Fill>
<DrawingBrush>
<DrawingBrush.Drawing>
<DrawingGroup>
<DrawingGroup.Children>
<GeometryDrawing Brush="#00FFFFFF" Geometry="F1M16,16L0,16 0,0 16,0z" />
<GeometryDrawing Brush="#FFF6F6F6" Geometry="F1M16,8C16,12.411 12.411,16 8,16 3.589,16 0,12.411 0,8 0,6.597 0.384,5.212 1.088,4L0,4 0,0 8,0 8,8 4,8C4,10.206 5.794,12 8,12 10.206,12 12,10.206 12,8 12,6.656 11.331,5.41 10.21,4.666L9.377,4.112 11.592,0.78 12.425,1.333C14.663,2.822,16,5.314,16,8" />
<GeometryDrawing Brush="#FF424242" Geometry="F1M15,8C15,11.859 11.859,15 8,15 4.14,15 1,11.859 1,8 1,6.076 1.801,4.292 3.121,3L1,3 1,1 7,1 7,7 5,7 5,4.002C3.766,4.931 3,6.401 3,8 3,10.757 5.243,13 8,13 10.757,13 13,10.757 13,8 13,6.321 12.164,4.763 10.764,3.833L11.871,2.167C13.83,3.469,15,5.649,15,8" />
</DrawingGroup.Children>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
</Rectangle.Fill>
</Rectangle>
</Viewbox>
发布于 2019-02-28 07:03:07
根据Ed Plunkett的建议,您可以在触发器中设置内容。
下面是一个完整的示例,说明您可能如何做到这一点。我已经将按钮的IsEnabled属性绑定到一个复选框,以便对其进行测试。
请记住,如果要修改触发器中的属性,则必须在样式中使用Setter设置该属性,而不是将其设置为普通属性。
<Window x:Class="ButtonTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:ButtonTest"
mc:Ignorable="d"
Title="MainWindow" Height="80" Width="800">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button Grid.Column="0" IsEnabled="{Binding IsChecked, ElementName=cb}" >
<Button.Style>
<Style TargetType="Button">
<Setter Property="Content">
<Setter.Value>
<Viewbox Width="16" Height="16">
<Rectangle Width="16" Height="16">
<Rectangle.Fill>
<DrawingBrush>
<DrawingBrush.Drawing>
<DrawingGroup>
<DrawingGroup.Children>
<GeometryDrawing Brush="#00FFFFFF" Geometry="F1M16,16L0,16 0,0 16,0z" />
<GeometryDrawing Brush="#FFF6F6F6" Geometry="F1M16,8C16,12.411 12.411,16 8,16 3.589,16 0,12.411 0,8 0,6.597 0.384,5.212 1.088,4L0,4 0,0 8,0 8,8 4,8C4,10.206 5.794,12 8,12 10.206,12 12,10.206 12,8 12,6.656 11.331,5.41 10.21,4.666L9.377,4.112 11.592,0.78 12.425,1.333C14.663,2.822,16,5.314,16,8" />
<GeometryDrawing Brush="#FF00529C" Geometry="F1M15,8C15,11.859 11.859,15 8,15 4.14,15 1,11.859 1,8 1,6.076 1.801,4.292 3.121,3L1,3 1,1 7,1 7,7 5,7 5,4.002C3.766,4.931 3,6.401 3,8 3,10.757 5.243,13 8,13 10.757,13 13,10.757 13,8 13,6.321 12.164,4.763 10.764,3.833L11.871,2.167C13.83,3.469,15,5.649,15,8" />
</DrawingGroup.Children>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
</Rectangle.Fill>
</Rectangle>
</Viewbox>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Content">
<Setter.Value>
<Viewbox Width="16" Height="16">
<Rectangle Width="16" Height="16">
<Rectangle.Fill>
<DrawingBrush>
<DrawingBrush.Drawing>
<DrawingGroup>
<DrawingGroup.Children>
<GeometryDrawing Brush="#00FFFFFF" Geometry="F1M16,16L0,16 0,0 16,0z" />
<GeometryDrawing Brush="#FFF6F6F6" Geometry="F1M16,8C16,12.411 12.411,16 8,16 3.589,16 0,12.411 0,8 0,6.597 0.384,5.212 1.088,4L0,4 0,0 8,0 8,8 4,8C4,10.206 5.794,12 8,12 10.206,12 12,10.206 12,8 12,6.656 11.331,5.41 10.21,4.666L9.377,4.112 11.592,0.78 12.425,1.333C14.663,2.822,16,5.314,16,8" />
<GeometryDrawing Brush="#FF424242" Geometry="F1M15,8C15,11.859 11.859,15 8,15 4.14,15 1,11.859 1,8 1,6.076 1.801,4.292 3.121,3L1,3 1,1 7,1 7,7 5,7 5,4.002C3.766,4.931 3,6.401 3,8 3,10.757 5.243,13 8,13 10.757,13 13,10.757 13,8 13,6.321 12.164,4.763 10.764,3.833L11.871,2.167C13.83,3.469,15,5.649,15,8" />
</DrawingGroup.Children>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
</Rectangle.Fill>
</Rectangle>
</Viewbox>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
<CheckBox x:Name="cb" Content="Enabled" Grid.Column="1"/>
</Grid>
</Window>
发布于 2019-02-28 07:01:24
您可以使用Triggers
根据IsEnabled
属性值设置Content
。
<Button Command="{Binding RefreshCommand}">
<Button.Style>
<Style TargetType="Button">
<Style.Triggers>
<Trigger Property="IsEnabled" Value="True">
<Setter Property="Content">
<Setter.Value>
<!--Your drawing / image when it's enabled-->
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Content">
<Setter.Value>
<!--Your drawing / image when it's disabled-->
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
https://stackoverflow.com/questions/54914119
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