如何在wpf数据网格中删除选定的行(使用复选框)

本文关键字：复选框 删除 wpf 数据 数据网 网格 | 更新日期: 2023-09-27 18:15:47

我的WPF DataGrid是:

<dg:DataGrid Name="datagrid1"  Grid.RowSpan="1"  VerticalAlignment="Stretch" Grid.ColumnSpan="2">
    <dg:DataGrid.Columns >
        <dg:DataGridTemplateColumn>
            <dg:DataGridTemplateColumn.Header>
                <CheckBox Content=" Slect All" x:Name="headerCheckBox" />
            </dg:DataGridTemplateColumn.Header>
            <dg:DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <CheckBox Name="chkSelectAll" Margin="45 2 0 0"
      IsChecked="{Binding IsChecked, ElementName=headerCheckBox, 
                          Mode=OneWay}" />
                </DataTemplate>
            </dg:DataGridTemplateColumn.CellTemplate>
        </dg:DataGridTemplateColumn>
    </dg:DataGrid.Columns>
</dg:DataGrid>

还动态地将数据填充到datgrid中。在xaml.cs文件中，我编写了以下给定的代码，用于从数据网格中删除所选行，但它在

行抛出错误
DataGridRow item =(DataGridRow) datagrid1.ItemContainerGenerator.ContainerFromItem(datagrid1.Items[j]);

所以请看看下面给出的代码，我写了同样的。

   private void Button_Click_1(object sender, RoutedEventArgs e)
    {
        for (int j = 0; j < datagrid1.Items.Count; j++)
        {
            DataGridRow item =(DataGridRow) datagrid1.ItemContainerGenerator.ContainerFromItem(datagrid1.Items[j]);
            CheckBox ckb = (CheckBox)GetVisualChild<CheckBox>(item);
            if (ckb.IsChecked.Value)
            {
                DataRowView drv = (DataRowView)datagrid1.Items[j];
               //delete the row- updating to the database
            }
        }
    }
    static T GetVisualChild<T>(Visual parent) where T : Visual
    {
        T child = default(T);
        int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
        for (int i = 0; i < numVisuals; i++)
        {
            Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
            child = v as T;
            if (child == null)
            {
                child = GetVisualChild<T>(v);
            }
            if (child != null)
            {
                break;
            }
        }
        return child;
    }

如果我错了请告诉我

如何在wpf数据网格中删除选定的行(使用复选框)

我将这样做。实现继承INotifyPropertyChanged的类的ObservableCollection。如果我们想要更新集合中的项，将使用INotifyPropertyChanged。

首先是GridView的xaml 
<DataGrid x:Name="gvMain" AutoGenerateColumns="True" HorizontalAlignment="Left"
        VerticalAlignment="Top" Height="300" Width="300"></DataGrid>

我们的项目类

public class MyClass : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;
    private string firstName { get; set; }
    private string lastName { get; set; }
    public string FirstName
    {
        get 
        {
            return firstName;
        }
        set
        {
            firstName = value;
            PropertyChangedEvent("FirstName");
        }
    }
    public string LastName
    {
        get
        {
            return lastName;
        }
        set
        {
            lastName = value;
            PropertyChangedEvent("LastName");
        }
    }
    private void PropertyChangedEvent(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

接下来是WPF窗口

public ObservableCollection<MyClass> gridData { get; set; }
public MainWindow()
{
    InitializeComponent();
    gridData = new ObservableCollection<MyClass>();
    gvMain.ItemsSource = gridData;
}

测试添加、更改、删除集合中的项

private void btnAdd_Click(object sender, RoutedEventArgs e)
{
    gridData.Add(new MyClass() { FirstName = "John", LastName = "Smith"  });
}
private void btnChange_Click(object sender, RoutedEventArgs e)
{
    gridData[0].FirstName = "Meow Mix";
}
private void btnDelete_Click(object sender, RoutedEventArgs e)
{
    //using List to use .ForEach less code to write and looks cleaner to me
    List<MyClass> remove = gridData.Where(x => x.LastName.Equals("Smith")).ToList();
    remove.ForEach(x => gridData.Remove(x));
}

任何你想做的改变都可以通过gridData来完成。

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