即使这是一个旧帖子，但我还是想分享我的发现，因为它们可能对其他人有用。我遇到了类似的问题（我的*列不再按预期均匀分配宽度，它们只是根据内容调整大小）。根本原因在于我有一个ListView，其ItemsSource链接到一个List。WPF中的ListView包含一个ScrollViewer，而ScrollViewer没有固定的宽度。没有固定宽度，Grid无法确定要给*列多少宽度并切换到不同的调整方法。
解决方案
现在我使用一个不包含ScrollViewer的ItemsControl，因此宽度是已知的，可以使Grid正确地调整其列宽。
有关Grid如何处理其大小调整的更多详细信息，建议您反编译Grid类并查看以下方法：
protected override Size MeasureOverride(Size constraint)
这是我的测试应用程序的MainWindow.xaml文件（将ListView注释掉以查看行为差异）：
<Window x:Class="WPFSO.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:wpfso="clr-namespace:WPFSO"
Title="MainWindow" Height="150" Width="525">
<Window.DataContext>
<wpfso:SharedSizeScopeViewModel />
</Window.DataContext>
<Window.Resources>
<DataTemplate DataType="{x:Type wpfso:TestViewModel}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" x:Name="SecondColumn" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" x:Name="FourthColumn" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding Name}" />
<TextBlock Grid.Column="1" Background="LightGray" Text="{Binding Name2}"/>
<TextBlock Grid.Column="2" Text="{Binding Name3}"/>
<TextBlock Grid.Column="3" Background="Orange" Text="{Binding Name4}"/>
<!--<TextBlock Grid.Column="1" Background="Blue" HorizontalAlignment="Stretch" />
<TextBlock Grid.Column="3" Background="Orange" HorizontalAlignment="Stretch" />-->
</Grid>
</DataTemplate>
<DataTemplate x:Key="MainDataTemplate" DataType="wpfso:SharedSizeScopeViewModel" >
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<CheckBox Grid.Row="0" Grid.ColumnSpan="4" HorizontalAlignment="Left" FlowDirection="RightToLeft" Margin="0,0,0,25">
<TextBlock FlowDirection="LeftToRight" Text="Show differences" Style="{StaticResource LabelStyle}" />
</CheckBox>
<TextBlock Grid.Row="1" Grid.Column="0" Text="PropertyName" Style="{StaticResource LabelStyle}" />
<TextBlock Grid.Row="1" Grid.Column="1" Text="Previous value" Style="{StaticResource LabelStyle}" />
<TextBlock Grid.Row="1" Grid.Column="3" Text="Current value" Style="{StaticResource LabelStyle}" />
<ListView Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="4" ItemsSource="{Binding Entries}" HorizontalAlignment="Stretch" Margin="0" HorizontalContentAlignment="Stretch"/>
</Grid>
</DataTemplate>
</Window.Resources>
<Grid Name="RootGrid">
<ItemsControl ItemsSource="{Binding Entries}" />
<!--<ListView ItemsSource="{Binding Entries}" />-->
</Grid>
</Window>
The ViewModels used during this test:
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
namespace WPFSO
{
public class SharedSizeScopeViewModel : INotifyPropertyChanged
{
public SharedSizeScopeViewModel()
{
var testEntries = new ObservableCollection<TestViewModel>();
testEntries.Add(new TestViewModel
{
Name = "Test",
Name2 = "Looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong test",
Name3 = "Short test",
Name4 = "Nothing"
});
Entries = testEntries;
}
private ObservableCollection<TestViewModel> _entries;
public ObservableCollection<TestViewModel> Entries
{
get { return _entries; }
set
{
_entries = value;
OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
}
第一个视图模型
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
namespace WPFSO
{
public class SharedSizeScopeViewModel : INotifyPropertyChanged
{
public SharedSizeScopeViewModel()
{
var testEntries = new ObservableCollection<TestViewModel>();
testEntries.Add(new TestViewModel
{
Name = "Test",
Name2 = "Looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong test",
Name3 = "Short test",
Name4 = "Nothing"
});
Entries = testEntries;
}
private ObservableCollection<TestViewModel> _entries;
public ObservableCollection<TestViewModel> Entries
{
get { return _entries; }
set
{
_entries = value;
OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
}
第二个视图模型
using System.ComponentModel;
using System.Runtime.CompilerServices;
namespace WPFSO
{
public class TestViewModel : INotifyPropertyChanged
{
private string _name;
private string _name2;
private string _name3;
private string _name4;
public string Name
{
get { return _name; }
set
{
_name = value;
OnPropertyChanged();
}
}
public string Name2
{
get { return _name2; }
set
{
_name2 = value;
OnPropertyChanged();
}
}
public string Name3
{
get { return _name3; }
set
{
_name3 = value;
OnPropertyChanged();
}
}
public string Name4
{
get { return _name4; }
set
{
_name4 = value;
OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
}
Grid位于ListBox的DataTemplate内。 - Brendan