如何在更改另一列时刷新 WPF 数据网格中的依赖列？

Question

所以我得到了一个这样创建的 WPF 数据网格：

<DataGrid x:Name="columns" Grid.Row="1" HorizontalContentAlignment="Stretch" HorizontalAlignment="Stretch" ItemsSource="{Binding}" DataContext="{StaticResource ColumnsCollection}"  
           AutoGenerateColumns="False" CanUserAddRows="True" CanUserDeleteRows="True" AddingNewItem="columns_AddingNewItem">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Name" Binding="{Binding Name}" Width="Auto"/>
        <DataGridTextColumn Header="Width of Name" Binding="{Binding WidthOfNameInCentimeter}"  Width="Auto"/>
    </DataGrid.Columns>
</DataGrid>

初始化如下：

CollectionViewSource itemCollectionViewSource;
itemCollectionViewSource = (CollectionViewSource)(FindResource("ColumnsCollection"));
itemCollectionViewSource.Source = new ObservableCollection<FormCreatorColumnInfoDatasource>();

并填充。

FormCreatorColumnInfoDatasource 如下所示：

class FormCreatorColumnInfoDatasource : INotifyPropertyChanged
{
    private IFormCreatorColumnInfo m_info;
    
    public string Name
    {
        get
        {
            return m_info.Name;
        }
        set
        {
            m_info.Name = value;
        }
    }

    public string WidthOfNameInCentimeter
    {
        get
        {
            var exactWidthInCentimeter = Name.Length * 0.238M;
            var roundedUpToHalfCentimeter = Math.Round(exactWidthInCentimeter * 2, MidpointRounding.AwayFromZero) / 2;
            return (roundedUpToHalfCentimeter).ToString();
        }
    }       
    
}

所以现在我想在用户手动更改列的名称时立即更改列 WidthOfNameInCentimeter（名称宽度）的内容，以便此列中始终有正确的信息。

我该怎么做？

Answer 1

在@lidqy 的帮助下，我添加了一个函数并更改了 Name:

的 setter

class FormCreatorColumnInfoDatasource : INotifyPropertyChanged
{
    private IFormCreatorColumnInfo m_info;
    
    public string Name
    {
        get
        {
            return m_info.Name;
        }
        set
        {
            m_info.Name = value;
            OnPropertyChanged(nameof(Name));
            OnPropertyChanged(nameof(WidthOfNameInCentimeter));             
        }
    }

    public string WidthOfNameInCentimeter
    {
        get
        {
            var exactWidthInCentimeter = Name.Length * 0.238M;
            var roundedUpToHalfCentimeter = Math.Round(exactWidthInCentimeter * 2, MidpointRounding.AwayFromZero) / 2;
            return (roundedUpToHalfCentimeter).ToString();
        }
    }     

    public event PropertyChangedEventHandler PropertyChanged;
    
    protected virtual void OnPropertyChanged(string property)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(property));
    }
}

不要忘记在数据源中实现 INotifyPropertyChanged 并将 ObservableCollection 用于数据网格源。

如何在更改另一列时刷新 WPF 数据网格中的依赖列？

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c#

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