添加数据时,WPF DataGrid的高度会增加

Question

我有一个WPF DataGrid,当我向其添加数据时,它的高度会增加,不适合它的初始高度.除非用户增加窗口大小,否则我不希望更改高度.有没有办法停止此自动调整大小？

<Window x:Class="WpfDataGridSizeTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Loaded="Window_Loaded"
        SizeToContent="WidthAndHeight">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <DockPanel Grid.Row="0">
            <DataGrid x:Name="wordsDataGrid" VerticalAlignment="Top" ItemsSource="{Binding}" MinHeight="100" SelectionMode="Single" AutoGenerateColumns="False" VerticalScrollBarVisibility="Auto" >
                <DataGrid.Columns>
                    <DataGridTextColumn Header="Column" Width="Auto" Binding="{Binding AString}"/>
                </DataGrid.Columns>
            </DataGrid>
        </DockPanel>
    </Grid>
</Window>

    public partial class MainWindow : Window
    {
        MyList myList = new MyList();

        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            wordsDataGrid.DataContext = myList;
            for (int i = 0; i < 100; ++i)
            {
                myList.AddOne("blah blah");
            }
        }
    }

    public class MyList : ObservableCollection<AClass>
    {
        public MyList() { }

        public void AddOne(string aString)
        {
            base.Add(new AClass(aString));
        }
    }

    public class AClass
    {
        public string AString { get; set; }

        public AClass(string aString)
        {
            AString = aString;
        }
    }

Answer 1

如果我没弄错，您希望您的DataGrid最初处于半高，在Windows内DataGrid下方有一些空白空间。然后，当调整窗口大小时，DataGrid会更改其大小。

向网格中再添加一行，并定义该行的MinHeight。然后将DataGrid设置为VerticalAlignment = Stretch。还要为窗口设置默认的高度大小。

<Window x:Class="WpfDataGridSizeTest.MainWindow" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        Title="MainWindow" Loaded="Window_Loaded" Height="300"> 
    <Grid> 
        <Grid.RowDefinitions> 
            <RowDefinition Height="*"/> 
            <RowDefinition MinHeight="100"/> 
        </Grid.RowDefinitions> 
        <DockPanel Grid.Row="0" VerticalAlignment="Stretch"> 
            <DataGrid x:Name="wordsDataGrid" VerticalAlignment="Stretch" ItemsSource="{Binding}" MinHeight="100" SelectionMode="Single" AutoGenerateColumns="False" VerticalScrollBarVisibility="Auto" > 
                <DataGrid.Columns> 
                    <DataGridTextColumn Header="Column" Width="Auto" Binding="{Binding AString}"/> 
                </DataGrid.Columns> 
            </DataGrid> 
        </DockPanel> 
    </Grid> 
</Window> 

Answer 2

我遇到了同样的问题，我通过简单地删除窗口定义中的SizeToContent="WidthAndHeight"来修复它。