Question

我的viewmodel中有一个命令，执行时会将一个项添加到observablecollection。在我看来，ItemsControl的源绑定到此集合。因此，无论何时添加项目，每个项目都会显示combobox和textblock。

我要做的是，让每组组合框/文本块出现在最后一组的右边，直到它到达窗口的末尾，然后下一组将出现在第一组的下方，依此类推。计划将其放在ScrollViewer中。到目前为止，我尝试过的所有内容都将每一组放在最后一组之下，而不是放在右边。

这是我的简单模型类：

public class DataModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private double _gridColumn;
    public double 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));
        }
    }
}

以下是viewmodel的相关部分：

public class MainWindowViewModel : INotifyPropertyChanged
{
    private int columnNum = 0;
    private ObservableCollection<DataModel> _dataModelCollection = new ObservableCollection<DataModel>();
    public ObservableCollection<DataModel> DataModelCollection
    {
        get { return _dataModelCollection; }
        set { _dataModelCollection = value; OnPropertyChanged("DataModelCollection"); }
    }

    public void AddDataModel(object parameter)
    {
        DataModelCollection.Add(new DataModel {GridColumn = columnNum % 8 });
        columnNum += 2;
    }
}

现在我的观点是：

<Grid Background="#44D3D3D3">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="140*" />
        <ColumnDefinition Width="7*" />
        <ColumnDefinition Width="140*" />
        <ColumnDefinition Width="7*" />
        <ColumnDefinition Width="140*" />
        <ColumnDefinition Width="7*" />
        <ColumnDefinition Width="140*" />
        <ColumnDefinition Width="7*" />
        <ColumnDefinition Width="140*" />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="46*" />
        <RowDefinition Height="139*" />
        <RowDefinition Height="38*" />
        <RowDefinition Height="78*" />
        <RowDefinition Height="60*" />
        <RowDefinition Height="50*" />
    </Grid.RowDefinitions>
    <Button Grid.Row="3"
            Grid.Column="2"
            Content="Add Set"
            Command="{Binding AddDataModelCmd}"/>
    <ItemsControl Grid.Row="4"
                  Grid.RowSpan="2"
                  Grid.ColumnSpan="9"
                  ItemsSource="{Binding DataModelCollection}">
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                    <Grid Grid.Column="{Binding GridColumn}">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="140*" />
                            <ColumnDefinition Width="7*" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="7" />
                            <RowDefinition Height="53" />
                            <RowDefinition Height="50" />
                        </Grid.RowDefinitions>
                        <ComboBox Grid.Column="0" Grid.Row="1" />
                        <TextBlock Text="tester"
                                   Grid.Column="0"
                                   Grid.Row="2"/>
                    </Grid>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>
</Grid>

我把ItemsPanelTemplate设置为WrapPanel，这让我得到了并排的结果，但我无法在每组项目之间找到任何间距。

设置ItemsControl项的位置

0 个答案: