你可以通过按钮设置DataTrigger要显示/隐藏,并绑定到DataGrid中的Items.Count
财产。
只要集合中的物品数量达到0或1,该按钮将被隐藏,当超过1时,它将再次显示。
XAML:
<Window x:Class="WpfApplication2.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">
<StackPanel>
<DataGrid Name="dg1" ItemsSource="{Binding MyFooCollection}" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Id}" />
<DataGridTextColumn Binding="{Binding Name}" />
</DataGrid.Columns>
</DataGrid>
<StackPanel>
<Button Content="Add row" Click="btnAdd" />
<Button Content="Remove row" Click="btnRemove" />
<Button Content="Will be shown/hidden">
<Button.Style>
<Style TargetType="Button">
<Style.Triggers>
<DataTrigger Binding="{Binding Items.Count, ElementName=dg1}" Value="0">
<Setter Property="Visibility" Value="Hidden" />
</DataTrigger>
<DataTrigger Binding="{Binding Items.Count, ElementName=dg1}" Value="1">
<Setter Property="Visibility" Value="Hidden" />
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
</StackPanel>
</StackPanel>
</Window>
代码隐藏:
public partial class MainWindow : Window
{
public ObservableCollection<Foo> MyFooCollection { get; set; }
public MainWindow()
{
InitializeComponent();
this.MyFooCollection = new ObservableCollection<Foo>
{
new Foo(1, "Bar1"), new Foo(2, "Bar2"), new Foo(3, "Bar3"),
new Foo(4, "Bar4"), new Foo(5, "Bar5"), new Foo(6, "Bar6")
};
this.DataContext = this;
}
private void btnAdd(object sender, RoutedEventArgs e)
{
MyFooCollection.Add(new Foo(11, "Test1"));
}
private void btnRemove(object sender, RoutedEventArgs e)
{
if (MyFooCollection.Any())
MyFooCollection.RemoveAt(0);
}
public class Foo
{
public int Id { get; set; }
public string Name { get; set; }
public Foo(int id, string name)
{
Id = id;
Name = name;
}
}
}
我想你锣获得总计数不上该行的计数。你可以把一个属性放在你的集合中吗? – Paparazzi