WPF DG-如何刪除DataGrid上Button的單擊事件

Question

我遇到以下問題。

我從我的DataGrid中用鼠標點擊選擇一行，如下所示： Admin admin =（Admin）dGrid.SelectedItem;

如何使用按鈕單擊事件刪除此行？我無法使用Rows.Delete，也沒有發現任何刪除，刪除WPF中的命令。謝謝你的幫助！

Answer 1

如果您將DataGrid綁定到可觀察集合（以兩種方式），那麼從集合中刪除選定的項目就是您需要完成的工作; 這裏是如何進行（的DoubleClick要刪除）的示例：

<Grid>  
    <DataGrid ItemsSource="{Binding AdminCollection,Mode=TwoWay}" SelectedItem="{Binding SelectedAdmin}" MouseDoubleClick="DeleteRowEvent" >   
    </DataGrid>   
</Grid> 

和後面的相應的代碼：

public partial class MainWindow : Window, INotifyPropertyChanged 
{ 
    private Admin _selectedAdmin = new Admin(); 
    public Admin SelectedAdmin 
    { 
     get { return _selectedAdmin; } 
     set 
     { 
      if (_selectedAdmin == value) return; 
      _selectedAdmin = value; 
      OnPropertyChanged(); 
     } 
    } 

    private ObservableCollection<Admin> _adminCollection = new ObservableCollection<Admin>(); 
    public ObservableCollection<Admin> AdminCollection 
    { 
     get { return _adminCollection; } 
     set 
     { 
      if (_adminCollection == value) return; 
      _adminCollection = value; 
      OnPropertyChanged(); 
     } 
    } 
    public MainWindow() 
    { 
     InitializeComponent(); 
     AdminCollection = new ObservableCollection<Admin>() 
    { 
     new Admin() 
     { 
      Name = "James",Age = 34, Location = "Paris" 
     }, 
     new Admin() 
     { 
      Name = "Joe",Age = 34, Location = "Us" 
     }, 
     new Admin() 
     { 
      Name = "Ann",Age = 34, Location = "Canada" 
     }, 
    }; 
    } 

    public event PropertyChangedEventHandler PropertyChanged; 

    [NotifyPropertyChangedInvocator] 
    protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null) 
    { 
     PropertyChangedEventHandler handler = PropertyChanged; 
     if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName)); 
    } 

    private void DeleteRowEvent(object sender, MouseButtonEventArgs e) 
    { 
     AdminCollection.Remove(AdminCollection.First(x => x.Id == SelectedAdmin.Id)); 
    } 
} 
public class Admin 
{ 
    public string Id { get; set; } 
    public string Name { get; set; } 
    public string Location { get; set; } 
    public int Age { get; set; } 
} 

在DataContext設置爲後面的代碼在MainWindow.xaml

DataContext="{Binding RelativeSource={RelativeSource Self}}" 

Answer 2

這實際上取決於你如何將數據綁定到DataGrid。

由於它看起來像綁定了一個可管理類型的枚舉，因此應該在列表中找到它並將其刪除。然後DataGrid應該更新。

Answer 3

如果u手動創建DataGrid和使用LINQ然後ü可以嘗試

這樣的： -

<Window x:Class="Wpf_grid.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="MainWindow" Height="326" Width="946"> 
<Grid> 
    <DataGrid Name="MyDataGrid" Uid="MyDataGrid" AutoGenerateColumns="False" AlternationCount="2" SelectionMode="Single" Margin="0,31,0,0" IsReadOnly="False" > 
     <DataGrid.Columns> 
      <DataGridTextColumn Binding="{Binding Path=RegId}" IsReadOnly="False" Header="Registration Id" Width="sizeToHeader"/> 
      <DataGridTextColumn Binding="{Binding Path=Name}" IsReadOnly="False" Header="Name" Width="sizeToHeader" /> 

     <--Many column here--> 

      <DataGridTemplateColumn Header="Edit Row"> 
       <DataGridTemplateColumn.CellTemplate> 
        <DataTemplate> 
         <Button Content="Edit" Click="btnEdit_Click"/> 
        </DataTemplate> 
       </DataGridTemplateColumn.CellTemplate> 
      </DataGridTemplateColumn> 
      <DataGridTemplateColumn Header="Delete Row"> 
       <DataGridTemplateColumn.CellTemplate> 
        <DataTemplate> 
         <Button Content="Delete" Click="btnDelete_Click"/> 
        </DataTemplate> 
       </DataGridTemplateColumn.CellTemplate> 
      </DataGridTemplateColumn> 
     </DataGrid.Columns> 
    </DataGrid> 
</Grid> 

這裏是的.cs代碼

private void btnDelete_Click(object sender, RoutedEventArgs e) 
    { 
     gridDataContext gcdd = new gridDataContext(); 
     registration RegistrationRow = MyDataGrid.SelectedItem as registration; 
     var Registration = (from p in gcdd.registrations where p.RegId == RegistrationRow.RegId select p).Single(); 
     gcdd.registrations.DeleteOnSubmit(Registration); 
     gcdd.SubmitChanges(); 
     MessageBox.Show("Row Deleted Successfully"); 
     LoadCustomerDetail(); 
    }