我正在尝试获取包含网格的ItemsControl,以显示具有不同属性的9个复选框 . 然而,只有三个出现过 .
我有一个复选框模型类,它有四个属性,表示复选框的内容,grid.row /列和isChecked属性 . 然后我在我的viewmodel中创建其中的九个并将它们添加到 ObservableCollection
.
接下来,我将ItemsControl的ItemsSource绑定到集合 . 然后,我将一个复选框控件添加到ItemsControl内部的网格,并绑定相应的属性 .
但是,只显示前三个复选框,我不明白为什么 . 我通过调试验证了绑定的集合确实具有正确数量的项目 .
这是我的CheckboxModel类:
public class CheckboxModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private bool _isChecked;
public bool IsChecked
{
get { return _isChecked; }
set { _isChecked = value; OnPropertyChanged("IsChecked"); }
}
private string _content;
public string Content
{
get { return _content; }
set { _content = value; OnPropertyChanged("Content"); }
}
private int _gridRow;
public int GridRow
{
get { return _gridRow; }
set { _gridRow = value; OnPropertyChanged("GridRow"); }
}
private int _gridColumn;
public int GridColumn
{
get { return _gridColumn; }
set { _gridColumn = value; OnPropertyChanged("GridColumn"); }
}
// Create the OnPropertyChanged method to raise the event
protected void OnPropertyChanged(string name)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(name));
}
}
}
在我的视图模型中,我创建了以下集合:
private ObservableCollection<CheckboxModel> _checkBoxList = new ObservableCollection<CheckboxModel>();
public ObservableCollection<CheckboxModel> CheckBoxList
{
get
{
return _checkBoxList;
}
set
{
if (null != value)
{
_checkBoxList = value;
OnPropertyChanged("CheckBoxList");
}
}
}
public void CreateCheckboxList()
{
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "Latitude", GridRow = 0, GridColumn = 0 });
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "Longitude", GridRow = 1, GridColumn = 0 });
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "Altitude", GridRow = 2, GridColumn = 0 });
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "Depth", GridRow = 0, GridColumn = 1 });
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "Speed", GridRow = 1, GridColumn = 1 });
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "Heading", GridRow = 2, GridColumn = 1 });
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "Roll", GridRow = 0, GridColumn = 2 });
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "Pitch", GridRow = 1, GridColumn = 2 });
CheckBoxList.Add(new CheckboxModel { IsChecked = true, Content = "VOS", GridRow = 2, GridColumn = 2 });
}
最后这是我的xaml:
<ItemsControl ItemsSource="{Binding CheckBoxList}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="149.6*" />
<ColumnDefinition Width="149.6*" />
<ColumnDefinition Width="149.6*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="28*" />
<RowDefinition Height="28*" />
<RowDefinition Height="28*" />
</Grid.RowDefinitions>
<CheckBox Grid.Row="{Binding GridRow}"
Grid.Column="{Binding GridColumn}"
Margin="14,6,63,6"
VerticalAlignment="Center"
Content="{Binding Content}"
IsChecked="{Binding IsChecked}" />
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
这是它的样子:
这就是我想要它的样子:
2 回答
问题是为
ObservableCollection
中的每个项目创建了一个新的网格,但是对于所有项目,您需要一个网格 .您可以将
ItemsControl
的ItemsPanel
设置为Grid
,并使用ItemContainerStyle
设置每个项目容器的Grid.Row
和Grid.Column
附加属性 .这应该工作:
我认为你的问题是丢失的物品只是垂直堆放在视线之外 . 你想要一个
WrapPanel
作为你的项目面板 . 您还需要确保ItemsControl不会自动调整其大小比其父级大 .