窗口上建立了一个TextBox接收用户输入，输入为int型，int x表示用户要添加x个button并且显示出来。想法师在一个StackPanel上添加用户需要个数的Button控件。但是对C#不熟悉，总是显示不出来。因为button的个数动态增加或者减少，所以没法在XAML里面写。代码如下：
public void pro_click(object sender, RoutedEventArgs e)
{
x = int.Parse(amount.Text);
StackPanel sp = new StackPanel();
Button[] btn = new Button[x];
Ellipse[] el = new Ellipse[x];
for (int i = 0; i < x; i++)
{
btn[i] = new Button();
el[i] = new Ellipse();
el[i].Width = 50;
el[i].Height = 50;
el[i].DataContext = "el1";
btn[i].Background=new SolidColorBrush(Colors.AliceBlue);
btn[i].Width = 50;
btn[i].Height = 50;
abc.Children.Add(el[i]);
}
}
其中abc是在xmal里面声明的canvas：
<Canvas Name="abc">
</Canvas>在上面的代码中无论是button btn还是ellipse el都在MainWindow中显示不出来……
请教各位大人该如何写……
比较小白，因为要做毕业设计才学的WPF，快到中期答辩了很多问题还是解决不了……先谢谢了
public void pro_click(object sender, RoutedEventArgs e)
{
x = int.Parse(amount.Text);
StackPanel sp = new StackPanel();
Button[] btn = new Button[x];
Ellipse[] el = new Ellipse[x];
for (int i = 0; i < x; i++)
{
btn[i] = new Button();
el[i] = new Ellipse();
el[i].Width = 50;
el[i].Height = 50;
el[i].DataContext = "el1";
btn[i].Background=new SolidColorBrush(Colors.AliceBlue);
btn[i].Width = 50;
btn[i].Height = 50;
abc.Children.Add(el[i]);
}
}
其中abc是在xmal里面声明的canvas：
<Canvas Name="abc">
</Canvas>在上面的代码中无论是button btn还是ellipse el都在MainWindow中显示不出来……
请教各位大人该如何写……
比较小白，因为要做毕业设计才学的WPF，快到中期答辩了很多问题还是解决不了……先谢谢了
<StackPanel Name="abc">
<Button Name="button1" Click="Button_Click">
click here!
</Button>
</StackPanel>Button[] btn = new Button[2];
for (int i = 0; i < 2; i++)
{
btn[i] = new Button();
btn[i].Background = new SolidColorBrush(Colors.AliceBlue);
btn[i].Width = 50;
btn[i].Height = 50;
abc.Children.Add(btn[i]);
}
<Canvas x:Name="parent">
<Canvas x:Name="right" Width="150" Height="400" Canvas.Left="350" Canvas.Top="0" Background="AliceBlue">
<Button Canvas.Left="35" Canvas.Top="90" Content="添加" Height="30" Name="btnAdd" Width="75" Click="btnAdd_Click" />
<Button Canvas.Left="35" Canvas.Top="190" Content="清空" Height="30" Name="btnClear" Width="75" Click="btnClear_Click" />
</Canvas>
<Canvas x:Name="left" Width="349" Height="400" Canvas.Left="0" Canvas.Top="0" Background="AntiqueWhite">
</Canvas>
</Canvas> private void btnAdd_Click(object sender, RoutedEventArgs e)
{
Button btn = new Button();
Ellipse el = new Ellipse();//创建一个椭圆
el.Width = 30;//宽度为30px
el.Height = 30;//高度为30px
btn.Width = 50;
btn.Height = 50;
el.Fill = new SolidColorBrush(Colors.Orange);//设置椭圆填充色为橙色
el.Stroke = new SolidColorBrush(Colors.Black);//设置椭圆边框色为黑色
el.StrokeThickness = 2;//设置边框粗细为2px #region 设置你自己想放的位置
Random ra = new Random();//创建一个随机数
double x, y;
x = ra.NextDouble() * 300;
y = ra.NextDouble() * 350;//设置椭圆的x,y的位置为随机数
double x1 = ra.NextDouble() * 100;
double y1 = ra.NextDouble() * 135;
el.SetValue(Canvas.LeftProperty, x);//定椭圆的位置
el.SetValue(Canvas.TopProperty, y);
btn.SetValue(Canvas.LeftProperty,x1);//定按钮的位置
btn.SetValue(Canvas.LeftProperty, y1);
#endregion left.Children.Add(el);//在left中添加椭圆
left.Children.Add(btn); } private void btnClear_Click(object sender, RoutedEventArgs e)
{
left.Children.Clear();//清空left中所有的子节点元素
}
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<DockPanel>
<!--输入数字更改，显示Button数目自动更改-->
<TextBox DockPanel.Dock="Top" Height="23" Text="{Binding Num,UpdateSourceTrigger=PropertyChanged}"/>
<ItemsControl ItemsSource="{Binding Buttons}">
<ItemsControl.ItemTemplate>
<!--列表项的模板显示为Button-->
<DataTemplate>
<Button Content="{Binding Content}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
<!--显示所有按钮的容器-->
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel></StackPanel>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</DockPanel>
</Window>cs代码：using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;using System.ComponentModel;
using System.Collections.ObjectModel;namespace WpfApplication1
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window ,INotifyPropertyChanged
{
public ObservableCollection<ButtonModel> _buttons;
public ObservableCollection<ButtonModel> Buttons
{
get
{
return _buttons;
}
} private int _Num; public int Num
{
get { return _Num; }
set
{
if (_Num == value)
return;
_Num = value; // 数字更改，重新生成Buttons列表
if (_buttons != null)
_buttons.Clear();
else
_buttons = new ObservableCollection<ButtonModel>(); for (int i = 1; i <= _Num; i++)
{
_buttons.Add(new ButtonModel {Index=Num,Content="按钮" + i });
} RaisePropertyChanged("Buttons");
RaisePropertyChanged("Num"); }
}
public MainWindow()
{
InitializeComponent(); this.DataContext = this;
} #region INotifyPropertyChanged 实现接口以通知页面更改
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void RaisePropertyChanged(string propertyName)
{
VerifyPropertyName(propertyName); var handler = PropertyChanged; if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
} public void VerifyPropertyName(string propertyName)
{
var myType = this.GetType();
if (myType.GetProperty(propertyName) == null)
{
throw new ArgumentException("Property not found", propertyName);
}
}
#endregion
} /// <summary>
/// 按钮属性的Model
/// </summary>
public class ButtonModel
{
public int Index { get;set; }
public string Content { get; set; }
//通过按钮绑定ICommand还可以实现按钮处理方法的绑定，此例中没实现这部分功能
public System.Windows.Input.ICommand ButtonCommand{get;set;}
}
}