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c# - 如何将命令绑定(bind)到 ListView WPF 中的复选框?

转载 作者:行者123 更新时间:2023-11-30 21:41:23 27 4
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我编辑了下面的代码以匹配建议,它现在可以正常工作了。

我见过几个与此类似的堆栈溢出问题,但我还不能完全将它们放在一起。我有以下 xaml 代码。

<UserControl x:Class="AuditEfficiencyMVVM.View.AuditTestsMain"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:AuditEfficiencyMVVM.View"
xmlns:viewmodel="clr-namespace:AuditEfficiencyMVVM.ViewModel"
mc:Ignorable="d"
d:DesignHeight="500" d:DesignWidth="1000">

<UserControl.DataContext>
<viewmodel:AuditTests/>
</UserControl.DataContext>

<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>

<Grid.RowDefinitions>
<RowDefinition Height="50"/>
<RowDefinition/>
<RowDefinition Height="50"/>
</Grid.RowDefinitions>

<ListView Grid.Row="1" Grid.Column="0" Margin="10" ItemsSource="{Binding Path=Tests}">
<ListView.View>
<GridView>
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<CheckBox Name="TestSelected" IsChecked="{Binding Path=Selected, Mode=TwoWay}" Command="{Binding Path=TestSelected, RelativeSource={RelativeSource AncestorType=ListView}}"/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Test Type" DisplayMemberBinding="{Binding Type, Mode=OneWay}"/>
<GridViewColumn Header="Progress">
<GridViewColumn.CellTemplate>
<DataTemplate>
<ProgressBar Name="TestProgress" Width="50" Height="20" Value="{Binding Progress, Mode=OneWay}"/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Status" DisplayMemberBinding="{Binding Status, Mode=OneWay}"/>
</GridView>
</ListView.View>

<ListView.GroupStyle>
<GroupStyle>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Expander IsExpanded="True">
<Expander.Header>
<TextBlock FontWeight="Bold" FontSize="14" Text="{Binding Name}"/>
</Expander.Header>
<ItemsPresenter/>
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</ListView.GroupStyle>
</ListView>

<ListView Grid.Row="1" Grid.Column="1" Margin="10" ItemsSource="{Binding Path=Files}">
<ListView.View>
<GridView>
<GridViewColumn Header="File Type" DisplayMemberBinding="{Binding Type, Mode=OneWay}"/>
<GridViewColumn Header="File Location" Width="250">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Text="{Binding Path=Location, Mode=TwoWay}" Width="225"/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<Button Width="30" Height="20">...</Button>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>

<Button Grid.Row="2" Grid.Column="1" HorizontalAlignment="Right" Margin="10" Width="50" Height="30">Run</Button>
</Grid>
</UserControl>

下面是我的代码

public class AuditTests : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private RelayCommand _testSelected;

private void AddTest()
{
MessageBox.Show("Success");
}

public RelayCommand TestSelected
{
get
{
return _testSelected;
}
private set
{
if (_testSelected != value)
{
_testSelected = value;
RaisePropertyChanged("TestSelected");
}
}
}

private void RaisePropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}

public AuditTests()
{
TestSelected = new RelayCommand(AddTest);
}

public ObservableCollection<Model.File> Files
{
get;
set;
}

public ObservableCollection<Model.Test> Tests
{
get;
set;
}

public void LoadFiles()
{
ObservableCollection<Model.File> files = new ObservableCollection<Model.File>();

foreach (Model.Test test in Tests)
{
foreach (Enums.FileType type in test.ExpectedSources)
{
Boolean containsType = false;
foreach (Model.File file in files)
{
if (file.Type == type)
{
containsType = true;
break;
}
}

if (!containsType)
{
files.Add(new Model.File { Type = type, Location = "", Tests = new List<Enums.TestType> { test.Type } });
}
else
{
files.Where(t => t.Type == type).First().Tests.Add(test.Type);
}
}
}

Files = files;
}

public void LoadTests()
{
ObservableCollection<Model.Test> tests = new ObservableCollection<Model.Test>();

foreach (var prop in Enum.GetValues(typeof(Enums.TestType)).Cast<Enums.TestType>().ToList())
{
tests.Add(new Model.Test { Category = prop.GetCategory(), Type = prop, Progress = 0, Selected = true, Status = Enums.TestStatus.NotStarted, ExpectedSources = prop.GetExpectedFiles() });
}

Tests = tests;
}
}
}

从我读到的内容来看,这似乎应该有效,但是当我选中/取消选中复选框时,消息框未激活。为了使检查/取消检查命令起作用,我在这里缺少什么?

最佳答案

TestSelected 命令是一个属性 AuditTests 对象。 CheckBox 的 DataContext 是 Model.Test 对象。他们在不同的层次上。您可以使用 RelativeSource 参数将命令绑定(bind)到 ListView DataContext 中的属性:

Command="{Binding Path=DataContext.TestSelected, 
RelativeSource={RelativeSource AncestorType=ListView}}"

关于c# - 如何将命令绑定(bind)到 ListView WPF 中的复选框?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43416802/

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