---
lang: ja-jp
breaks: true
---
# WPF DataGrid を `AutoGenerateColumns="True"` としたときに、余計な項目を削除する 2022-06-28

    <Window.DataContext>
        <viewModels:MainWindowViewModel />
    </Window.DataContext>

    <Grid>
        <DataGrid
            ItemsSource="{Binding Peoples_IEnumerable}" 
            
            AutoGenerateColumns="True"
           
            ・・・
            AutoGeneratingColumn="DataGrid_AutoGeneratingColumn"
            />
    </Grid>

力技だが、これしか思いつかない。。

private void DataGrid_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    switch (e.PropertyName)
    {
        case "DependencyObjectType":
        case "IsSealed":
        case "Dispatcher":
        case "XmlAttributeProperties.XmlSpace":
        case "XmlAttributeProperties.XmlnsDictionary":
        case "XmlAttributeProperties.XmlnsDefinition":
        case "XmlAttributeProperties.XmlNamespaceMaps":
        case "InputMethod.IsInputMethodEnabled":
        case "InputMethod.IsInputMethodSuspended":
        case "InputMethod.PreferredImeState":
        case "InputMethod.PreferredImeConversionMode":
        case "InputMethod.PreferredImeSentenceMode":
        case "InputMethod.InputScope":
        case "ToolTipService.ToolTip":
        case "ToolTipService.HorizontalOffset":
        case "ToolTipService.VerticalOffset":
        case "ToolTipService.HasDropShadow":
        case "ToolTipService.PlacementTarget":
        case "ToolTipService.PlacementRectangle":
        case "ToolTipService.Placement":
        case "ToolTipService.ShowOnDisabled":
        case "ToolTipService.IsEnabled":
        case "ToolTipService.ShowDuration":
        case "ToolTipService.InitialShowDelay":
        case "ToolTipService.BetweenShowDelay":
        case "ContextMenuService.ContextMenu":
        case "ContextMenuService.HorizontalOffset":
        case "ContextMenuService.VerticalOffset":
        case "ContextMenuService.HasDropShadow":
        case "ContextMenuService.PlacementTarget":
        case "ContextMenuService.PlacementRectangle":
        case "ContextMenuService.Placement":
        case "ContextMenuService.ShowOnDisabled":
        case "ContextMenuService.IsEnabled":
        case "Stylus.IsPressAndHoldEnabled":
        case "Stylus.IsFlicksEnabled":
        case "Stylus.IsTapFeedbackEnabled":
        case "RenderOptions.EdgeMode":
        case "RenderOptions.BitmapScalingMode":
        case "RenderOptions.ClearTypeHint":
        case "NumberSubstitution.CultureSource":
        case "NumberSubstitution.CultureOverride":
        case "NumberSubstitution.Substitution":
        case "Typography.StandardLigatures":
        case "Typography.ContextualLigatures":
        case "Typography.DiscretionaryLigatures":
        case "Typography.HistoricalLigatures":
        case "Typography.AnnotationAlternates":
        case "Typography.ContextualAlternates":
        case "Typography.HistoricalForms":
        case "Typography.Kerning":
        case "Typography.CapitalSpacing":
        case "Typography.CaseSensitiveForms":
        case "Typography.StylisticSet1":
        case "Typography.StylisticSet2":
        case "Typography.StylisticSet3":
        case "Typography.StylisticSet4":
        case "Typography.StylisticSet5":
        case "Typography.StylisticSet6":
        case "Typography.StylisticSet7":
        case "Typography.StylisticSet8":
        case "Typography.StylisticSet9":
        case "Typography.StylisticSet10":
        case "Typography.StylisticSet11":
        case "Typography.StylisticSet12":
        case "Typography.StylisticSet13":
        case "Typography.StylisticSet14":
        case "Typography.StylisticSet15":
        case "Typography.StylisticSet16":
        case "Typography.StylisticSet17":
        case "Typography.StylisticSet18":
        case "Typography.StylisticSet19":
        case "Typography.StylisticSet20":
        case "Typography.Fraction":
        case "Typography.SlashedZero":
        case "Typography.MathematicalGreek":
        case "Typography.EastAsianExpertForms":
        case "Typography.Variants":
        case "Typography.Capitals":
        case "Typography.NumeralStyle":
        case "Typography.NumeralAlignment":
        case "Typography.EastAsianWidths":
        case "Typography.EastAsianLanguage":
        case "Typography.StandardSwashes":
        case "Typography.ContextualSwashes":
        case "Typography.StylisticAlternates":
        case "KeyboardNavigation.TabIndex":
        case "KeyboardNavigation.IsTabStop":
        case "KeyboardNavigation.TabNavigation":
        case "KeyboardNavigation.ControlTabNavigation":
        case "KeyboardNavigation.DirectionalNavigation":
        case "KeyboardNavigation.AcceptsReturn":
        case "Validation.ErrorTemplate":
        case "Validation.ValidationAdornerSite":
        case "Validation.ValidationAdornerSiteFor":
        case "ToolTipService.IsOpen":
            
        case "Length":
        case "LongLength":
        case "Rank":
        case "SyncRoot":
        case "IsReadOnly":
        case "IsFixedSize":
        case "IsSynchronized":

        case "InputLanguageManager.InputLanguage":
        case "InputLanguageManager.RestoreInputLanguage":
            
            e.Cancel = true;
            break;

        default:
            Debug.WriteLine($"-------- DataGrid_AutoGeneratingColumn {e.PropertyName} {e.PropertyType} {e.Column} {e.PropertyDescriptor}");
            break;
    }    
}

###### tags: `WPF` `DataGrid` `AutoGenerateColumns`