wpf datagrid DataGridTemplateColumn.CellTemplate TextBox HorizontalAlignment

Question

我需要在列DataGrid上的水平拉伸TextBox。我试着这样做：

<DataGridTemplateColumn Header="Time from"  Width="3*">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
                <TextBox x:Name="txtTextBlock" Text="{Binding Path=TimeOfActions.StartTime, UpdateSourceTrigger=PropertyChanged}" IsReadOnly="{Binding Path=TimeOfActions.IsReadOnly}" HorizontalAlignment="Stretch"/>
        </DataTemplate>
        </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

但我得到的结果是：enter image description here

我做错了什么？

Answer 1

用DockPanel/StackPanel替换WrapPanel，它应该可以正常工作。事实上，你不需要事件面板，代码本身就足够了：

ItemsSource dataGrid

dgDirectoryConditions.ItemsSource = ((ImageItemsViewModel)DataContext).Directories.ConditionsDirectory;

ImageItemsViewModel.cs

internal class ImageItemsViewModel : DependencyObject
{
     ...
     public ObservableCollection<ConditionsDirectory> ConditionsDirectories { get; set; }
     ...
}

ConditionsDirectory.cs

public class ConditionsDirectory : BaseDirectory, INotifyPropertyChanged
{
    public ConditionsDirectory()
    {
        DurationOfParking = new DurationOfParking
        {
            IsReadOnly = true
        };
        TimeOfActions = new TimeOfActions
        {
            IsReadOnly = true
        };;
    }

    public TimeOfActions TimeOfActions { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;

    public void OnPropertyChanged([CallerMemberName]string prop = "")
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(prop));
    }
}

TimeOfActions.cs

public class TimeOfActions : INotifyPropertyChanged
{
    [JsonProperty("start_time")]
    public string StartTime
    {
        get { return StartTimePrivate; }
        set
        {
            if (!string.IsNullOrWhiteSpace(value) || !string.IsNullOrWhiteSpace(EndTime))
            {
                IsReadOnly = false;
            }
            else
            {
                IsReadOnly = true;
            }

            StartTimePrivate = value;
        }
    }

    [JsonIgnore]
    private string StartTimePrivate { get; set; }

    [JsonProperty("end_time")]
    public string EndTime
    {
        get { return EndTimePrivate; }
        set
        {
            if (!string.IsNullOrWhiteSpace(value) || !string.IsNullOrWhiteSpace(StartTime))
            {
                IsReadOnly = false;
            }
            else
            {
                IsReadOnly = true;
            }

            EndTimePrivate = value;
        }
    }

    [JsonIgnore]
    private string EndTimePrivate { get; set; }

    [JsonIgnore]
    public bool IsReadOnly { get; set; }

    public override string ToString()
    {
        return $"{StartTime} - {EndTime}";
    }

    public event PropertyChangedEventHandler PropertyChanged;
    public void OnPropertyChanged([CallerMemberName]string prop = "")
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(prop));
    }
}