您好我的WPF应用程序中随机分配了一些按钮，如下所示：
partial class Window1
{
private void button3_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("action 3");
}
void button2Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("action 2");
}
void button1Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("action 1");
}
public Window1()
{
this.InitializeComponent();
populateButtons();
}
public void populateButtons()
{
double xPos;
double yPos;
Random ranNum = new Random();
foreach (var routedEventHandler in new RoutedEventHandler[] { button1Click, button2Click, button3_Click })
{
Button foo = new Button();
Style buttonStyle = Window.Resources["CurvedButton"] as Style;
int sizeValue = 100;
foo.Width = sizeValue;
foo.Height = sizeValue;
xPos = ranNum.Next(200);
yPos = ranNum.Next(250);
foo.HorizontalAlignment = HorizontalAlignment.Left;
foo.VerticalAlignment = VerticalAlignment.Top;
foo.Margin = new Thickness(xPos, yPos, 0, 0);
foo.Style = buttonStyle;
foo.Click += routedEventHandler;
LayoutRoot.Children.Add(foo);
}
}
}
}
我设置了填充按钮的区域，如下所示：
int xPos;
int yPos;
xPos = ranNum.Next(239);
yPos = ranNum.Next(307);
foo.HorizontalAlignment = HorizontalAlignment.Left;
foo.VerticalAlignment = VerticalAlignment.Top;
foo.Margin = new Thickness(xPos, yPos, 0, 0);
我现在更喜欢做的是使用名为viewbox1的视图框设置此区域（原始呃！）;）
有没有办法在后面的代码中执行此操作？
XAML：
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xml:lang="en-US"
x:Class="DynamicButtons.Window1"
x:Name="Window"
Title="Dynamic Buttons"
WindowState="Normal" WindowStyle="None" AllowsTransparency="True" Background="Transparent"
Width="840" Height="600" Icon="shape_group.png">
<Window.Resources>
<Style x:Key="CurvedButton" BasedOn="{x:Null}" TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<ControlTemplate.Resources>
<Storyboard x:Key="OnMouseMove1">
<ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)">
<SplineColorKeyFrame KeyTime="00:00:00" Value="#FFFFFFFF"/>
<SplineColorKeyFrame KeyTime="00:00:00.3000000" Value="#7CE1DBDB"/>
</ColorAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="1"/>
<SplineDoubleKeyFrame KeyTime="00:00:00.3000000" Value="1.66"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="1"/>
<SplineDoubleKeyFrame KeyTime="00:00:00.3000000" Value="1.66"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="OnMouseLeave1">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)">
<SplineDoubleKeyFrame KeyTime="00:00:00.8000000" Value="1.78"/>
<SplineDoubleKeyFrame KeyTime="00:00:01" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
<SplineDoubleKeyFrame KeyTime="00:00:00.8000000" Value="1.78"/>
<SplineDoubleKeyFrame KeyTime="00:00:01" Value="1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="OnClick1">
<ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="rectangle" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)">
<SplineColorKeyFrame KeyTime="00:00:00.2000000" Value="#FFFFFFFF"/>
<SplineColorKeyFrame KeyTime="00:00:00.3000000" Value="#BFA0D1E2"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</ControlTemplate.Resources>
<Grid>
<Rectangle RenderTransformOrigin="1,1" Fill="#3FFFFFFF" Stroke="{x:Null}" RadiusX="11" RadiusY="11" x:Name="rectangle">
<Rectangle.RenderTransform>
<TransformGroup>
<ScaleTransform ScaleX="1" ScaleY="1"/>
<SkewTransform AngleX="0" AngleY="0"/>
<RotateTransform Angle="0"/>
<TranslateTransform X="0" Y="0"/>
</TransformGroup>
</Rectangle.RenderTransform>
</Rectangle>
<ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True"/>
</Grid>
<ControlTemplate.Triggers>
<EventTrigger RoutedEvent="ButtonBase.Click">
<BeginStoryboard x:Name="OnClick1_BeginStoryboard" Storyboard="{StaticResource OnClick1}"/>
</EventTrigger>
<EventTrigger RoutedEvent="Mouse.MouseLeave">
<BeginStoryboard x:Name="OnMouseLeave1_BeginStoryboard" Storyboard="{StaticResource OnMouseLeave1}"/>
</EventTrigger>
<EventTrigger RoutedEvent="FrameworkElement.Loaded"/>
<EventTrigger RoutedEvent="Mouse.MouseEnter">
<BeginStoryboard x:Name="OnMouseMove1_BeginStoryboard" Storyboard="{StaticResource OnMouseMove1}"/>
</EventTrigger>
<Trigger Property="IsFocused" Value="True"/>
<Trigger Property="IsDefaulted" Value="True"/>
<Trigger Property="IsMouseOver" Value="True"/>
<Trigger Property="IsPressed" Value="True"/>
<Trigger Property="IsEnabled" Value="False"/>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="Background">
<Setter.Value>
<LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF3F3F3" Offset="0"/>
<GradientStop Color="#FFEBEBEB" Offset="0.5"/>
<GradientStop Color="#FFDDDDDD" Offset="0.5"/>
<GradientStop Color="#E1CDCDCD" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Window.Triggers>
<EventTrigger RoutedEvent="FrameworkElement.Loaded"/>
</Window.Triggers>
<Grid x:Name="LayoutRoot">
<Grid Name="MainLayoutGrid" Background="#2b2b2b">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="4" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="4" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="4" />
<RowDefinition Height="25" />
<RowDefinition Height="*" />
<RowDefinition Height="4" />
</Grid.RowDefinitions>
<Grid Grid.Column="1" Grid.Row="1" Name="TitleGrid">
<Grid.RowDefinitions>
<RowDefinition Height="2"/>
<RowDefinition Height="*"/>
<RowDefinition Height="4"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="100"/>
</Grid.ColumnDefinitions>
<Grid Grid.Row="1" Grid.Column="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="20"/>
<ColumnDefinition Width="4"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Image Grid.Column="0" Name="ImageIcon" Stretch="Uniform"/>
<TextBlock Grid.Column="2" Name="Titleblk" Foreground="White">Wanna be Title</TextBlock>
</Grid>
<Grid Grid.Row="0" Grid.Column="2" Grid.RowSpan="2">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button Name="btnMin" Grid.Column="1" Grid.ColumnSpan="2" Margin="8,4,42,-4">
<Button.RenderTransform>
<ScaleTransform ScaleX="0.8" ScaleY="0.8"></ScaleTransform>
</Button.RenderTransform>
<Button.Clip>
<RectangleGeometry RadiusX="1000" RadiusY="1000" Rect="0,0,18,20" />
</Button.Clip>
</Button>
<Button Name="btnMax" Grid.Column="2" Margin="2,4,23,-4">
<Button.RenderTransform>
<ScaleTransform ScaleX="0.8" ScaleY="0.8"></ScaleTransform>
</Button.RenderTransform>
<Button.Clip>
<RectangleGeometry RadiusX="1000" RadiusY="1000" Rect="0,0,18,20" />
</Button.Clip>
</Button>
<Button Name="btnClose" Grid.Column="2" Margin="24,0,6,0" BorderBrush="#00000000" BorderThickness="0" ClickMode="Press" Foreground="#00000000" HorizontalAlignment="Stretch" HorizontalContentAlignment="Center" OpacityMask="#82F8F8F8" VerticalAlignment="Stretch" VerticalContentAlignment="Center">
<Button.Clip>
<RectangleGeometry RadiusX="1000" RadiusY="1000" Rect="0,0,20,20" />
</Button.Clip>
</Button>
</Grid>
</Grid>
<Grid Grid.Column="1" Grid.Row="2">
<Grid.Background>
<LinearGradientBrush EndPoint="0.484,0.543" StartPoint="0.478,0.009">
<GradientStop Color="Gray" Offset="1"/>
<GradientStop Color="DarkGray" Offset="0"/>
</LinearGradientBrush>
</Grid.Background>
<UniformGrid>
<Viewbox Height="364" Name="viewbox1" Width="363" VerticalAlignment="Stretch" Margin="6,0,441,164" />
</UniformGrid>
</Grid>
</Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<!--<Canvas Height="284" HorizontalAlignment="Left" Margin="457,66,0,0" Name="canvas1" VerticalAlignment="Top" Width="300" />-->
</Grid>
</Window>
完整代码：
namespace DynamicButtons
{
partial class Window1
{
void button3_Click(object sender, RoutedEventArgs e)
{
if (e.RoutedEvent == FrameworkElement.LoadedEvent)
{
ToolTip t = new ToolTip();
t.Content = "Something helpful";
((Button)sender).ToolTip = t;
((Button)sender).Content = "Hello";
return;
}
MessageBox.Show("Hello you punk");
}
void button2Click(object sender, RoutedEventArgs e)
{
//ToolTip t = new ToolTip();
//t.Content = "Something helpful";
//((Button)sender).ToolTip = t;
//MessageBox.Show("action 2");
}
void button1Click(object sender, RoutedEventArgs e)
{
//ToolTip t = new ToolTip();
//t.Content = "Something helpful";
//((Button)sender).ToolTip = t;
////Button b = new Button();
//((Button)sender).Content = "Hello";
////b.ToolTip = t;
//MessageBox.Show("action 1");
}
public Window1()
{
this.InitializeComponent();
populateButtons();
}
public void populateButtons()
{
double xPos;
double yPos;
UniformGrid grid = new UniformGrid();
Viewbox viewBox = new Viewbox();
viewBox.Name = "viewbox1";
viewBox.Stretch = Stretch.Fill;
viewBox.Child = grid;
LayoutRoot.Children.Add(viewBox);
Random ranNum = new Random();
foreach (var routedEventHandler in new RoutedEventHandler[] { button1Click, button2Click, button3_Click })
{
Button foo = new Button();
Style buttonStyle = Window.Resources["CurvedButton"] as Style;
int sizeValue = 100;
foo.Width = sizeValue;
foo.Height = sizeValue;
xPos = ranNum.Next(100);
yPos = ranNum.Next(150);
foo.HorizontalAlignment = HorizontalAlignment.Left;
foo.VerticalAlignment = VerticalAlignment.Top;
foo.Margin = new Thickness(xPos, yPos, 0, 0);
foo.Style = buttonStyle;
foo.Click += routedEventHandler;
foo.Loaded += routedEventHandler;
grid.Children.Add(foo);
}
}
答案 0 :(得分：1)
您使用Viewbox的原因是什么？是出于伸展和规模的原因吗？
我建议使用Canvas，然后您可以设置Canvas.Left和Canvas.Top值，类似于设置xPos和yPos的方式。
然后，如果您希望拥有Viewbox的拉伸/缩放功能，则可以将您创建的Canvas作为Viewbox的子项。
更新：在运行过程中得到画布的ActualHeight和ActualWidth的值，您可以添加SizeChanged将事件处理程序（便于在XAML中做的，但不要太用力内码）来处理运行时的高度/宽度值的变化。这是代码解决方案：
bool initialized = false; // Should be located in class definition for your window
// ex. within "public partial class WindowName : Window
canvas.SizeChanged += new SizeChangedEventHandler(canvas_SizeChanged);
// Can be located in constructor for window
// ie. public MainWindow() { /* put it right here */ }
然后事件处理程序的定义如下:(这只创建一个按钮但可以使用for循环。）
位置更新下面的定义可以位于窗口的类def中，但低于布尔变量的定义＆＃34;已初始化＆＃34;。 （例如w / in＆＃34;公共部分类WindowName：Window＆＃34;）
private void canvas_SizeChanged(object sender, SizeChangedEventArgs e)
{
if (initialized == false) // so this only happens once.
{
int sizeValue = 100;
Random ranNum = new Random();
int modHeight = System.Convert.ToInt32(canvas.ActualHeight)-sizeValue;
int modWidth = System.Convert.ToInt32(canvas.ActualWidth)-sizeValue;
Button foo = new Button();
canvas.Children.Add(foo);
foo.Width = sizeValue;
foo.Height = sizeValue;
xPos = ranNum.Next(239) % modWidth;
yPos = ranNum.Next(307) % modHeight
Canvas.SetLeft(foo, xPos);
Canvas.SetTop(foo, yPos);
initialized = true;
}
}
或者，如果您知道画布的大小，您可以手动将modHeight和modWidth设置为您选择的像素值，而不必处理事件处理程序。
答案 1 :(得分：1)
要将按钮添加到ViewBox，您可以执行以下操作：
public void populateButtons()
{
double xPos;
double yPos;
UniformGrid grid = new UniformGrid();
viewbox1.Child = grid;
Random ranNum = new Random();
foreach (var routedEventHandler in new RoutedEventHandler[] { button1Click, button2Click, button3_Click })
{
Button foo = new Button();
Style buttonStyle = Window.Resources["CurvedButton"] as Style;
int sizeValue = 100;
foo.Width = sizeValue;
foo.Height = sizeValue;
xPos = ranNum.Next(200);
yPos = ranNum.Next(250);
foo.HorizontalAlignment = HorizontalAlignment.Left;
foo.VerticalAlignment = VerticalAlignment.Top;
foo.Margin = new Thickness(xPos, yPos, 0, 0);
foo.Style = buttonStyle;
foo.Click += routedEventHandler;
grid.Children.Add(foo);
}
}