Question

相邻Width="*"的列由于数据更改而扩展时，Width="Auto"的列不会自动收缩。

我想在DataGrid中显示具有三个属性（从左到右）的对象列表：

LongString
ShortString1
ShortString2

所有列均应可见：LongString数据可以截断，而ShortString1和ShortString2应该完整显示。

因此，我在XAML中定义了以下宽度的列：

LongString：“ *”
ShortString1：“自动”
ShortString2：“自动”

最初一切正常，但是当中间列的值变长时，最右边的列会滑出窗口（我希望最左边的列会随着其宽度为“ *”而缩小）。

XAML：

<Window x:Class="DataGridColumnWidthIssue.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="250" Width="400">
    <DockPanel>
        <Button Name="modifyButton" DockPanel.Dock="Bottom" HorizontalAlignment="Center"
                Padding="30,5,30,5" Click="modifyButton_Click">
            Modify
        </Button>
        <DataGrid Name="infoGrid" ItemsSource="{Binding Infos}" AutoGenerateColumns="False">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Long String" Binding="{Binding LongString}" Width="*"/>
                <DataGridTextColumn Header="Short String 1" Binding="{Binding ShortString1}" Width="Auto"/>
                <DataGridTextColumn Header="Short String 2" Binding="{Binding ShortString2}" Width="Auto"/>
            </DataGrid.Columns>
        </DataGrid>
    </DockPanel>
</Window>

隐藏代码：

using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Windows;

namespace DataGridColumnWidthIssue
{
    public partial class MainWindow : Window
    {
        public ObservableCollection<Info> Infos { get; } = new ObservableCollection<Info>();

        public MainWindow()
        {
            InitializeComponent();
            Infos.Add(new Info("Veeeeeeeeery looooooooooooong striiiiiiiiiiiiiing", "Short string 1", "Short string 2"));
            DataContext = this;
        }

        private void modifyButton_Click(object sender, RoutedEventArgs e)
        {
            Infos[0].ShortString1 += "AA";
        }
    }

    public class Info : INotifyPropertyChanged
    {
        public string LongString { get; }

        string shortString1;
        public string ShortString1
        {
            get { return shortString1; }
            set
            {
                if (value != shortString1)
                {
                    shortString1 = value;
                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("ShortString1"));
                }
            }
        }

        public string ShortString2 { get; }

        public Info(string longString, string shortString1, string shortString2)
        {
            LongString = longString;
            ShortString1 = shortString1;
            ShortString2 = shortString2;
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}

步骤1.运行程序。

结果符合预期：所有列均可见。

Screenshot (good 1)

步骤2。按两次窗口底部的“修改”按钮。（它将“ AA”添加到中间列属性（ShortString1）值。）

我期望的是