WPF指示灯的实现方式

• 样式

• XAML

<Button x:Name="Btn1" Width="25" Height="25" Grid.Row="0" Grid.Column="1" Margin="10 5 5 5 ">
                                    <Button.Template>
                                        <ControlTemplate TargetType="Button">
                                            <Grid>
                                                <!-- 外边框 -->
                                                <Ellipse Stroke="Gray" StrokeThickness="2">
                                                    <Ellipse.Fill>
                                                        <RadialGradientBrush>
                                                            <GradientStop Color="White" Offset="0"/>
                                                            <GradientStop Color="Gray" Offset="1"/>
                                                        </RadialGradientBrush>
                                                    </Ellipse.Fill>
                                                </Ellipse>
                                                <!-- 内部绿色圆形 -->
                                                <Ellipse Width="20" Height="20" x:Name="elp">
                                                    <Ellipse.Fill>
                                                        <RadialGradientBrush>
                                                            <GradientStop Color="LightGray" Offset="0"/>
                                                            <GradientStop Color="Gray" Offset="1"/>
                                                        </RadialGradientBrush>
                                                    </Ellipse.Fill>
                                                </Ellipse>
                                            </Grid>
                                        </ControlTemplate>
                                    </Button.Template>
                                </Button>

改变指示灯颜色

private void SetButtonGreenColor(System.Windows.Controls.Button titleButton, string titleControlName, string tagControlName)
        {
            System.Windows.Controls.Button button1 = (System.Windows.Controls.Button)this.FindName(titleControlName);
            Ellipse tag = (Ellipse)button1.Template.FindName(tagControlName, titleButton);
            Color startColor = Color.FromRgb(144, 238, 144);
            Color endColor = Color.FromRgb(0, 128, 0);

            RadialGradientBrush rgb = new RadialGradientBrush(startColor, endColor);
            tag.Fill = rgb;
        }

调用

  SetButtonGreenColor(Btn1, "Btn1", "elp");