我面臨著 WPF DataGrid Checkboxes C# 的問題。我沒有找到選擇選中標(biāo)題模板復(fù)選框時(shí)選中所有單元格模板的方法。在 viewmodel 中它工作正常。它被全選，但在視圖中它沒有在選中的標(biāo)題復(fù)選框上顯示任何選中的復(fù)選框符號(hào)/標(biāo)記。我遇到的問題與 DataGrid（WPF）中的復(fù)選框有關(guān)單擊此鏈接我想這樣做 我的 XAML 代碼：<DataGrid x:Name="DgLines" ItemsSource="{Binding OpcUaEndpoints}" MouseDoubleClick="DgLines_MouseDoubleClick" SelectionMode="Extended" DataContext="{Binding}" IsReadOnly="True" Grid.ColumnSpan="5"> <DataGrid.Columns> <DataGridTemplateColumn <DataGridTemplateColumn.HeaderTemplate> <DataTemplate> <CheckBox Name="ckbSelectedAll" Checked="ckbSelectedAll_Checked" Unchecked="ckbSelectedAll_Unchecked" IsChecked="{Binding IsSelected, UpdateSourceTrigger=PropertyChanged}"></CheckBox> </DataTemplate> </DataGridTemplateColumn.HeaderTemplate> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <CheckBox Name="cbkSelect" Checked="cbkSelect_Checked" Unchecked="cbkSelect_Unchecked" IsChecked="{Binding IsSelected, UpdateSourceTrigger=PropertyChanged}"/> </DataTemplate> </DataGridTemplateColumn.CellTemplate> </DataGridTemplateColumn> <!--<DataGridTextColumn Width="200" Header="Id" Binding="{Binding Id }" />--> <DataGridTextColumn Width="200" Header="Name" Binding="{Binding Name}"/> <DataGridTextColumn Width="500" Header="Description" Binding="{Binding Description}"/> <DataGridTextColumn Width="500" Header="Lines" Binding="{Binding Endpoint}"/> </DataGrid.Columns></DataGrid>
2 回答
LEATH
TA貢獻(xiàn)1936條經(jīng)驗(yàn) 獲得超7個(gè)贊
請(qǐng)找到工作代碼。我對(duì)你的代碼做了一些修改
XAML
<DataGrid x:Name="DgLines" ItemsSource="{Binding OpcUaEndpoints}" AutoGenerateColumns="False"
SelectionMode="Extended" IsReadOnly="True" Grid.ColumnSpan="5">
<DataGrid.Columns>
<DataGridTemplateColumn>
<DataGridTemplateColumn.HeaderTemplate>
<DataTemplate>
<CheckBox Name="ckbSelectedAll"
IsChecked="{Binding IsSelected, UpdateSourceTrigger=PropertyChanged}">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Checked" >
<i:InvokeCommandAction Command="{Binding DataContext.CheckedCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}" />
</i:EventTrigger>
<i:EventTrigger EventName="Unchecked" >
<i:InvokeCommandAction Command="{Binding DataContext.UncheckedCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}" />
</i:EventTrigger>
</i:Interaction.Triggers>
</CheckBox>
</DataTemplate>
</DataGridTemplateColumn.HeaderTemplate>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<CheckBox Name="cbkSelect"
IsChecked="{Binding IsSelected, UpdateSourceTrigger=PropertyChanged}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<!--<DataGridTextColumn Width="200" Header="Id" Binding="{Binding Id }" />-->
<DataGridTextColumn Width="200" Header="Name" Binding="{Binding Name}"/>
<DataGridTextColumn Width="500" Header="Description" Binding="{Binding Description}"/>
<DataGridTextColumn Width="500" Header="Lines" Binding="{Binding Endpoint}"/>
</DataGrid.Columns>
</DataGrid>
C＃
public class OpcUaEndpointsListViewModel : INotifyPropertyChanged
{
private static OpcUaEndpointsListViewModel _instance;
private static readonly object Padlock = new object();
private ICommand _addCommand;
//private ICommand _uncheckCommand;
private ICommand _searchcommand;
private ICommand _checkedCommand { get; set; }
private ICommand _unCheckedCommand { get; set; }
private ObservableCollection<AddOpcUaEndpointsViewModel> _endpoint;
public string _charNameFromTB;
public event PropertyChangedEventHandler PropertyChanged;
public OpcUaEndpointsListViewModel()
{
BindDataGrid();
}
public static OpcUaEndpointsListViewModel Instance
{
get
{
lock (Padlock)
{
return _instance ?? (_instance = new OpcUaEndpointsListViewModel());
}
}
}
/// <summary>
/// //OPC UA Endpoint List
/// </summary>
public ObservableCollection<AddOpcUaEndpointsViewModel> OpcUaEndpoints
{
get { return _endpoint; }
set
{
if (OpcUaEndpoints == value)
{
_endpoint = value;
OnPropertyChanged("OpcUaEndpoints");
}
}
}
public string CharNameFromTB
{
get { return _charNameFromTB; }
set
{
_charNameFromTB = value;
OnPropertyChanged("CharNameFromTB");
}
}
public ICommand AddCommand
{
get { return _addCommand ?? (_addCommand = new WpfApplication1.RelayCommand<object>(p => ExecuteAddCommand())); }
}
public ICommand SearchCommand
{
get { return _searchcommand ?? (_searchcommand = new RelayCommand<object>(p => ExecuteSearchCommand())); }
}
public ICommand CheckedCommand
{
get { return _checkedCommand ?? (_checkedCommand = new WpfApplication1.RelayCommand<object>(p => ExecuteCheckedCommand())); }
}
public ICommand UncheckedCommand
{
get { return _unCheckedCommand ?? (_unCheckedCommand = new WpfApplication1.RelayCommand<object>(p => ExecuteUnCheckedCommand())); }
}
private void ExecuteSearchCommand()
{
///BindDataGridsearch();
}
private void ExecuteCheckedCommand()
{
foreach (var item in _endpoint)
{
item.IsSelected = true;
}
}
private void ExecuteUnCheckedCommand()
{
foreach (var item in _endpoint)
{
item.IsSelected = false;
}
}
private void ExecuteAddCommand()
{
///BindDataGridsearch();
}
private void BindDataGrid()
{
_endpoint = new ObservableCollection<AddOpcUaEndpointsViewModel>();
_endpoint.Add(new AddOpcUaEndpointsViewModel { Name = "A", Description = "A", Endpoint = 1 });
_endpoint.Add(new AddOpcUaEndpointsViewModel { Name = "B", Description = "B", Endpoint = 2 });
_endpoint.Add(new AddOpcUaEndpointsViewModel { Name = "C", Description = "C", Endpoint = 3 });
_endpoint.Add(new AddOpcUaEndpointsViewModel { Name = "D", Description = "D", Endpoint = 4 });
_endpoint.Add(new AddOpcUaEndpointsViewModel { Name = "E", Description = "E", Endpoint = 5 });
}
public void OnPropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
public class AddOpcUaEndpointsViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
private string _name;
public string Name
{
get { return _name; }
set { _name = value; OnPropertyChanged("Name"); }
}
private string _description;
public string Description
{
get { return _description; }
set { _description = value; OnPropertyChanged("Description"); }
}
private int _endPoint;
public int Endpoint
{
get { return _endPoint; }
set { _endPoint = value; OnPropertyChanged("Endpoint"); }
}
private bool _isSelected;
public bool IsSelected
{
get { return _isSelected; }
set { _isSelected = value; OnPropertyChanged("IsSelected"); }
}
}
叮當(dāng)貓咪
TA貢獻(xiàn)1776條經(jīng)驗(yàn) 獲得超12個(gè)贊
該DataGrid列定義不繼承DataContext，因?yàn)樗麄儾皇且曈X樹的一部分。
您將不得不使用BindingProxy1 來解決這個(gè)問題。
<DataGrid.Resources>
<attached:BindingProxy x:Key="proxy" Data="{Binding}"/>
</DataGrid.Resources>
<DataGridTemplateColumn>
<DataGridTemplateColumn.Header>
<CheckBox IsChecked="{Binding Data.IsHeaderCheckBoxChecked, Source={StaticResource proxy}}"/>
</DataGridTemplateColumn.Header>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<CheckBox IsChecked="{Binding IsSelected, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
BindingProxy
public class BindingProxy : Freezable
{
#region XAML Properties
public static readonly DependencyProperty DataProperty =
DependencyProperty.Register(nameof(Data), typeof(object), typeof(BindingProxy), new UIPropertyMetadata(null));
public object Data
{
get { return GetValue(DataProperty); }
set { SetValue(DataProperty, value); }
}
#endregion
#region Freezable
protected override Freezable CreateInstanceCore()
{
return new BindingProxy();
}
#endregion
}
另請(qǐng)記住，您的 VM 中沒有 UI 控件，也沒有XXX_Clicked處理程序或類似程序。如有必要，它們屬于代碼隱藏文件 (*.xaml.cs)。
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