datagrid 相关问题

我有数据网格。我有数据网格。 <DataGrid ItemsSource="{Binding DataView}" x:Name="AttributeGrid" AutoGenerateColumns="False" CanUserAddRows="False" CanUserDeleteRows="False" EnableColumnVirtualization="False" EnableRowVirtualization="False" DataContextChanged="AttributeGrid_DataContextChanged"> </DataGrid> 对于该 DataGrid 的单元格，我有自定义样式 <Style x:Key="DataGridDataViewCustomCellStyle" TargetType="{x:Type DataGridCell}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="DataGridCell"> <Grid> <ComboBox x:Name="ComboBoxCondition" IsEditable="True" ItemsSource="{Binding Values}" Visibility="Collapsed" SelectedValue="{Binding SelectedValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" SelectedValuePath="ValueID" DisplayMemberPath="ValueStr"/> <TextBox x:Name="TextBoxCondition" Text="{Binding TextValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" IsEnabled="True" Visibility="Collapsed"/> <DatePicker x:Name="DateCondition" Text="{Binding DateValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" IsEnabled="True" Visibility="Collapsed"/> </Grid> <ControlTemplate.Triggers> <DataTrigger Binding="{Binding ValueType}" Value="Text"> <Setter Property="Visibility" TargetName="TextBoxCondition" Value="Visible"/> <Setter Property="Visibility" TargetName="ComboBoxCondition" Value="Hidden"/> <Setter Property="Visibility" TargetName="DateCondition" Value="Hidden"/> </DataTrigger> <DataTrigger Binding="{Binding ValueType}" Value="Combobox"> <Setter Property="Visibility" TargetName="TextBoxCondition" Value="Hidden"/> <Setter Property="Visibility" TargetName="ComboBoxCondition" Value="Visible"/> <Setter Property="Visibility" TargetName="DateCondition" Value="Hidden"/> </DataTrigger> <DataTrigger Binding="{Binding ValueType}" Value="Date"> <Setter Property="Visibility" TargetName="TextBoxCondition" Value="Hidden"/> <Setter Property="Visibility" TargetName="ComboBoxCondition" Value="Hidden"/> <Setter Property="Visibility" TargetName="DateCondition" Value="Visible"/> </DataTrigger> <DataTrigger Binding="{Binding IsModified, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" Value="True"> <Setter Property="Background" TargetName="TextBoxCondition" Value="Cornsilk"/> <Setter Property="Background" TargetName="ComboBoxCondition" Value="Cornsilk"/> <Setter Property="Background" TargetName="DateCondition" Value="Cornsilk"/> </DataTrigger> <DataTrigger Binding="{Binding IsModified, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" Value="False"> <Setter Property="Background" TargetName="TextBoxCondition" Value="White"/> <Setter Property="Background" TargetName="ComboBoxCondition" Value="White"/> <Setter Property="Background" TargetName="DateCondition" Value="White"/> </DataTrigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> 如果 DataView 基于 List<object> gridAttributes = new List<AttributeItem>(); gridAttributes add some data ..... DataView = CollectionViewSource.GetDefaultView(gridAttributes); 一切都按预期进行。在 DataGridCell 中，我有 AttributeIem 对象，并且可以根据需要设置其样式。但是，当 DataView 基于 DataTable 时，然后在 DataGridCell 中，由于某种原因我得到了 DataRowView，然后 Style 不起作用，一切都出错了。 RunDataTable.Rows.Clear(); RunDataTable.Columns.Clear(); RunDataTable.Columns.Add("SectionName"); RunDataTable.Columns.Add("RunName"); foreach (AttributeItem attr in gridAttributes) { RunDataTable.Columns.Add(attr.AttributeName, typeof(AttributeItem)); } DataRow row = RunDataTable.NewRow(); row["SectionName"] = section; row["RunName"] = name; foreach (AttributeItem item in gridAttributes) { row[item.AttributeName] = item; } RunDataTable.Rows.Add(row); DataView = new DataView(RunDataTable); 这是我收到的错误绑定列表 System.Windows.Data Error: 40 : BindingExpression path error: 'IsModified' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=IsModified; DataItem='DataRowView' (HashCode=47477033); target element is 'DataGridCell' (Name=''); target property is 'NoTarget' (type 'Object') System.Windows.Data Error: 40 : BindingExpression path error: 'Values' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=Values; DataItem='DataRowView' (HashCode=47477033); target element is 'ComboBox' (Name=''); target property is 'ItemsSource' (type 'IEnumerable') System.Windows.Data Error: 40 : BindingExpression path error: 'SelectedValue' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=SelectedValue; DataItem='DataRowView' (HashCode=47477033); target element is 'ComboBox' (Name=''); target property is 'SelectedValue' (type 'Object') System.Windows.Data Error: 40 : BindingExpression path error: 'TextValue' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=TextValue; DataItem='DataRowView' (HashCode=47477033); target element is 'TextBox' (Name=''); target property is 'Text' (type 'String') System.Windows.Data Error: 40 : BindingExpression path error: 'DateValue' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=DateValue; DataItem='DataRowView' (HashCode=47477033); target element is 'DatePicker' (Name=''); target property is 'Text' (type 'String') System.Windows.Data Error: 40 : BindingExpression path error: 'ValueType' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=ValueType; DataItem='DataRowView' (HashCode=47477033); target element is 'DataGridCell' (Name=''); target property is 'NoTarget' (type 'Object') System.Windows.Data Error: 40 : BindingExpression path error: 'ValueType' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=ValueType; DataItem='DataRowView' (HashCode=47477033); target element is 'DataGridCell' (Name=''); target property is 'NoTarget' (type 'Object') System.Windows.Data Error: 40 : BindingExpression path error: 'ValueType' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=ValueType; DataItem='DataRowView' (HashCode=47477033); target element is 'DataGridCell' (Name=''); target property is 'NoTarget' (type 'Object') System.Windows.Data Error: 40 : BindingExpression path error: 'IsModified' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=IsModified; DataItem='DataRowView' (HashCode=47477033); target element is 'DataGridCell' (Name=''); target property is 'NoTarget' (type 'Object') System.Windows.Data Error: 40 : BindingExpression path error: 'IsModified' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=IsModified; DataItem='DataRowView' (HashCode=47477033); target element is 'DataGridCell' (Name=''); target property is 'NoTarget' (type 'Object') System.Windows.Data Error: 40 : BindingExpression path error: 'Values' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=Values; DataItem='DataRowView' (HashCode=47477033); target element is 'ComboBox' (Name=''); target property is 'ItemsSource' (type 'IEnumerable') System.Windows.Data Error: 40 : BindingExpression path error: 'SelectedValue' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=SelectedValue; DataItem='DataRowView' (HashCode=47477033); target element is 'ComboBox' (Name=''); target property is 'SelectedValue' (type 'Object') System.Windows.Data Error: 40 : BindingExpression path error: 'TextValue' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=TextValue; DataItem='DataRowView' (HashCode=47477033); target element is 'TextBox' (Name=''); target property is 'Text' (type 'String') System.Windows.Data Error: 40 : BindingExpression path error: 'DateValue' property not found on 'object' ''DataRowView' (HashCode=47477033)'. BindingExpression:Path=DateValue; DataItem='DataRowView' (HashCode=47477033); target element is 'DatePicker' (Name=''); target property is 'Text' (type 'String') 任何建议我如何调整我的样式或代码隐藏以使其正常工作。谢谢。我尝试了不同的数据源方式。但不幸的是每次我都会遇到同样的错误添加列： public static void RefreshColumnsFromModel(this DataGrid datagrid, DataGridRuns gridModel) { var myResourceDictionary = new ResourceDictionary(); myResourceDictionary.Source = new Uri("/SomeSource;component/Resources/SomeSource.xaml", UriKind.RelativeOrAbsolute); datagrid.Columns.Clear(); foreach (ColumnWithFilter column in gridModel.Columns.OrderBy(c => c.Index)) { if (column.IsReadOnly) { datagrid.Columns.Add( new DataGridTextColumn() { Header = column.ColumnHeader, IsReadOnly = column.IsReadOnly, Binding = new Binding(column.ColumnBinding), CellStyle = myResourceDictionary["DataGridReadOnlyCellStyle"] as Style, HeaderTemplate = datagrid.Resources["HeaderTemplate"] as DataTemplate } ); } else { datagrid.Columns.Add( new DataGridTemplateColumn() { Header = column.ColumnHeader, IsReadOnly = column.IsReadOnly, //Binding = new Binding(column.ColumnBinding), //HeaderTemplate = myResourceDictionary["HeaderTemplate"] as DataTemplate HeaderTemplate = datagrid.Resources["HeaderTemplate"] as DataTemplate, CellStyle = myResourceDictionary["DataGridDataViewCustomCellStyle"] as Style } ); } } } DataGridRuns 代表 DataGrid 的模型，一些用于过滤和排序的自定义行为 public class DataGridRuns : BaseClass { private List<AttributeItem> gridAttributes = new List<AttributeItem>(); public ObservableCollection<AttributeItem> GridAttributes { get { return new ObservableCollection<AttributeItem>(gridAttributes); } set { gridAttributes = value.ToList(); RaisePropertyChanged(); } } public DataTable RunDataTable { get; set; } = new DataTable("RunData"); private DataView dataView = null; public DataView DataView { get { return dataView; } } private ColumnWithFilter selectedColumn = null; public ColumnWithFilter SelectedColumn { get { return selectedColumn; } set { selectedColumn = value; RaisePropertyChanged(); } } public Action RefreshColumns; private List<ColumnWithFilter> columns = new List<ColumnWithFilter>(); public ObservableCollection<ColumnWithFilter> Columns { get { return new ObservableCollection<ColumnWithFilter>(columns); } set { columns = value.ToList(); RaisePropertyChanged(); } } public DataGridRuns() { } private List<AttributeItem> CreateAttributesFromInfo(IList<AttributeInfo> _attributes) { List<AttributeItem> result = new List<AttributeItem>(); try { foreach (var attr in _attributes) { result.Add(new AttributeItem(attr)); } } catch (Exception ex) { } return result; } public void AddRun(string section, string name, IList<AttributeInfo> _attributes, bool template = false) { var attr = CreateAttributesFromInfo(_attributes); if (gridAttributes == null || gridAttributes.Count() == 0) { gridAttributes = new List<AttributeItem>(attr); CreateColumns(); } DataRow row = RunDataTable.NewRow(); row["SectionName"] = section; row["RunName"] = name; foreach (AttributeItem item in gridAttributes) { row[item.AttributeName] = item; } RunDataTable.Rows.Add(row); dataView = new DataView(RunDataTable); //dataView = CollectionViewSource.GetDefaultView(RunDataTable); } public void ClearData() { gridAttributes.Clear(); gridAttributes = new List<AttributeItem>(); } public void CreateColumns() { RunDataTable.Rows.Clear(); RunDataTable.Columns.Clear(); columns = new List<ColumnWithFilter>(); ColumnWithFilter col = null; col = new ColumnWithFilter("Section Name", nameof(AttributeItem.SectionName)) { Index = 0, IsReadOnly = true, }; columns.Add(col); RunDataTable.Columns.Add("SectionName"); col = new ColumnWithFilter("Run Name", nameof(AttributeItem.RunName)) { Index = 1, IsReadOnly = true, }; columns.Add(col); RunDataTable.Columns.Add("RunName"); int colIndex = 1; foreach (AttributeItem attr in gridAttributes) { col = new ColumnWithFilter(attr.AttributeName, nameof(attr)) { Index = ++colIndex, IsReadOnly = false, }; columns.Add(col); RunDataTable.Columns.Add(attr.AttributeName, typeof(AttributeItem)); } } public void RefreshDataView() { foreach (DataRow item in RunDataTable.Rows) { item.ItemArray.ToList().ForEach(a => (a as AttributeItem)?.StartMarkingModifications()); } RaisePropertyChanged(nameof(DataView)); } public void RefreshPopupContent(string header = "") { selectedColumn = columns.Where(c => c.ColumnHeader.Equals(header)).FirstOrDefault(); if (selectedColumn == null) return; selectedColumn.RefreshFilterValues(gridAttributes .Where(a => !string.IsNullOrEmpty((string)GetPropertyValue(a, selectedColumn.ColumnBinding))) .Select(a => (string)GetPropertyValue(a, selectedColumn.ColumnBinding)).Distinct().ToList()); RaisePropertyChanged(nameof(SelectedColumn)); } public void Filtering() { UpdateDataViewRowFilter(); } private void UpdateDataViewRowFilter() { string rowFilter = string.Empty; foreach (ColumnWithFilter column in columns.Where(c => c.FilterIndex > 0)) { string andStr = !string.IsNullOrEmpty(rowFilter) ? " AND " : ""; switch (column.FilterIndex) { case 1: rowFilter += andStr + $"{column.ColumnBinding} IS NULL"; break; default: rowFilter += andStr + $"{column.ColumnBinding} = '{column.FilteredValue}'"; //filterResult = ((string)GetPropertyValue(attribute, column.ColumnBinding)).Equals(column.FilteredValue); break; } } (dataView as DataView).RowFilter = rowFilter; } public object GetPropertyValue(object obj, string propertyName) { return obj.GetType().GetProperty(propertyName)?.GetValue(obj, null); } } 这是我在 DataTable 中看到的，我希望在 DataGrid 中也能看到同样的结果 DataTable Visualizer 的屏幕截图添加这是我在 UI 中看到的具有列过滤的自定义网格我不确定我是否正确理解了您的所有代码。我会根据我能理解的提供一个解决方案。在数据表单元格中，您的类型为“AttributeItem”。具有路径“column.ColumnBinding”的绑定将从相应的单元格返回该类型的实例。 ValueType 和 IsModified 属性（在 ControlTemplate 中使用）属于此实例。在这种情况下，我认为您错误地使用了 DataGridCell 样式更改。相反，您需要为单元格的内容创建一个数据模板。 <DataTemplate x:Key="DataGridDataViewCustomCellDataTemplate"> <Grid> <ComboBox x:Name="ComboBoxCondition" IsEditable="True" ItemsSource="{Binding Values}" Visibility="Collapsed" SelectedValue="{Binding SelectedValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" SelectedValuePath="ValueID" DisplayMemberPath="ValueStr"/> <TextBox x:Name="TextBoxCondition" Text="{Binding TextValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" IsEnabled="True" Visibility="Collapsed"/> <DatePicker x:Name="DateCondition" Text="{Binding DateValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" IsEnabled="True" Visibility="Collapsed"/> </Grid> <DataTemplate.Triggers> <DataTrigger Binding="{Binding ValueType}" Value="Text"> <Setter Property="Visibility" TargetName="TextBoxCondition" Value="Visible"/> <Setter Property="Visibility" TargetName="ComboBoxCondition" Value="Hidden"/> <Setter Property="Visibility" TargetName="DateCondition" Value="Hidden"/> </DataTrigger> <DataTrigger Binding="{Binding ValueType}" Value="Combobox"> <Setter Property="Visibility" TargetName="TextBoxCondition" Value="Hidden"/> <Setter Property="Visibility" TargetName="ComboBoxCondition" Value="Visible"/> <Setter Property="Visibility" TargetName="DateCondition" Value="Hidden"/> </DataTrigger> <DataTrigger Binding="{Binding ValueType}" Value="Date"> <Setter Property="Visibility" TargetName="TextBoxCondition" Value="Hidden"/> <Setter Property="Visibility" TargetName="ComboBoxCondition" Value="Hidden"/> <Setter Property="Visibility" TargetName="DateCondition" Value="Visible"/> </DataTrigger> <DataTrigger Binding="{Binding IsModified, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" Value="True"> <Setter Property="Background" TargetName="TextBoxCondition" Value="Cornsilk"/> <Setter Property="Background" TargetName="ComboBoxCondition" Value="Cornsilk"/> <Setter Property="Background" TargetName="DateCondition" Value="Cornsilk"/> </DataTrigger> <DataTrigger Binding="{Binding IsModified, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" Value="False"> <Setter Property="Background" TargetName="TextBoxCondition" Value="White"/> <Setter Property="Background" TargetName="ComboBoxCondition" Value="White"/> <Setter Property="Background" TargetName="DateCondition" Value="White"/> </DataTrigger> </DataTemplate.Triggers> </DataTemplate> 在模板 DataGridTemplateColumn 中，您需要创建一个带有 ContentControl 的模板，该模板将接受 Content 属性中路径“column.ColumnBinding”的绑定以及上述 ContentTemplate 属性中的模板。 private const string templateString = @" <DataTemplate xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""> <ContentControl Content=""{{Binding {0}}}"" ContentTemplate=""{{DynamicResource DataGridDataViewCustomCellDataTemplate}}""/> </DataTemplate> "; public static void RefreshColumnsFromModel(this DataGrid datagrid, DataGridRuns gridModel) { var myResourceDictionary = new ResourceDictionary(); myResourceDictionary.Source = new Uri("/SomeSource;component/Resources/SomeSource.xaml", UriKind.RelativeOrAbsolute); datagrid.Columns.Clear(); foreach (ColumnWithFilter column in gridModel.Columns.OrderBy(c => c.Index)) { if (column.IsReadOnly) { datagrid.Columns.Add( new DataGridTextColumn() { Header = column.ColumnHeader, IsReadOnly = column.IsReadOnly, Binding = new Binding(column.ColumnBinding), CellStyle = myResourceDictionary["DataGridReadOnlyCellStyle"] as Style, HeaderTemplate = datagrid.Resources["HeaderTemplate"] as DataTemplate } ); } else { string templateSource = string.Format(templateString, column.ColumnBinding); var template = XamlReader.Parse(templateSource); datagrid.Columns.Add( new DataGridTemplateColumn() { Header = column.ColumnHeader, IsReadOnly = column.IsReadOnly, //Binding = new Binding(column.ColumnBinding), //HeaderTemplate = myResourceDictionary["HeaderTemplate"] as DataTemplate HeaderTemplate = datagrid.Resources["HeaderTemplate"] as DataTemplate, CellStyle = myResourceDictionary["DataGridDataViewCustomCellStyle"] as Style } ); } } } 不幸的是，我无法测试这段代码。但如果您提供重现这些情况的最少代码，我可以进行测试并准备有保证的工作版本。

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