在WPF中添加动态按钮

时间:2013-10-22 12:01:08

标签: c# wpf

我制作了动态创建按钮的代码,但是如何为每个按钮分配不同的功能?

for (int i = 0; i < Buttons.Count; i++)
{
            Button newBtn = new Button();
            newBtn.Content = Buttons[i];
            newBtn.Name = "Button" + i.ToString();
            newBtn.Height = 23;
            stackPanel1.Children.Add(newBtn);
            newBtn.Click += new RoutedEventHandler(newBtn_Click);
}

private void newBtn_Click(object sender, RoutedEventArgs e)
{
        MessageBox.Show("Hello");
}

现在每个按钮显示“Hello”,但我希望它是“Hello1”,“Hello2”....等等。

5 个答案:

答案 0 :(得分:6)

如果您可以使用DelegateCommands或RelayCommand属性和DisplayName属性创建对象集合 - 您只需要一个ItemsControl绑定到此Collection,并使用DataTemplate将按钮绑定到Command和Text。

编辑:刚出头

 public class MyCommandWrapper
 {
    public ICommand Command {get;set;}
    public string DisplayName {get;set;}
 }
在您的viewmodel中

 public ObservableCollection<MyCommandWrapper> MyCommands {get;set;}

 MyCommands.Add(new MyCommandWrapper(){Command = MyTestCommand1, DisplayName = "Test 1"};
 ...
你的xaml

中的

  <ItemsControl ItemsSource="{Binding MyCommands}">
   <ItemsControl.Resources>
     <DataTemplate DataType="{x:Type local:MyCommandWrapper}">
       <Button Content="{Binding DisplayName}" Command="{Binding Command}"/>
     </DataTemplate>
   </ItemsControl.Resources>
  </ItemsControl>

编辑2:如果你需要一个新的动态按钮 - 只需在你的收藏中添加一个新的包装

答案 1 :(得分:2)

  for (int i = 0; i < Buttons.Count; i++)
    {
                Button newBtn = new Button();
                newBtn.Content = Buttons[i];
                newBtn.Height = 23;
                newBtn.Tag=i;
                stackPanel1.Children.Add(newBtn);
                newBtn.Click += new RoutedEventHandler(newBtn_Click);
    }

private void newBtn_Click(object sender, RoutedEventArgs e)
{
       Button btn=sender as Button;
       int i=(int)btn.Tag;

       switch(i)
       {
         case 0:  /*do something*/ break;
         case 1:  /*do something else*/ break;
         default: /*do something by default*/ break;
       }
}

答案 2 :(得分:1)

private void newBtn_Click(object sender, RoutedEventArgs e)
{
        var button = sender as Button;
        var buttonNumber = button.Name.Remove(0, 6);

        MessageBox.Show("Hello" + buttonNumber);
}

答案 3 :(得分:1)

检查sender功能的newBtn_Click参数。它应该包含被单击的按钮的实例。您可以将其强制转换为按钮并检查名称:

private void newBtn_Click(object sender, RoutedEventArgs e)
{
    var btn = sender as Button;
    if(btn != null)
    {
        MessageBox.Show(btn.Name);
    }
}

如果您不想检查Name属性,还可以使用Tag属性(http://msdn.microsoft.com/library/system.windows.frameworkelement.tag.aspx)来为其分配任意对象,并在以后检查:

Button newBtn = new Button();
newBtn.Tag = i;

稍后在点击处理程序中:

private void newBtn_Click(object sender, RoutedEventArgs e)
{
    var btn = sender as Button;
    if(btn != null)
    {
        if(btn.Tag is int)
            MessageBox.Show(String.Format("Hello{0}", btn.Tag));
    }
}

我更喜欢使用Tag的解决方案,因为它比从字符串中提取内容更安全。

答案 4 :(得分:1)

newBtn.Click += new RoutedEventHandler((s,e) => MessageBox.Show("hallo"+((Button)s).Name);