C# 将新行添加到绑定到DataGrid的DataTable后选择新行
我有一个简单的C#程序,数据表中有一些数据,它绑定到WPF数据网格C# 将新行添加到绑定到DataGrid的DataTable后选择新行,c#,wpf,datagrid,wpfdatagrid,C#,Wpf,Datagrid,Wpfdatagrid,我有一个简单的C#程序,数据表中有一些数据,它绑定到WPF数据网格 <DataGrid Grid.Row="1" DataContext="{Binding}" Name="dataGridEditTab" 我有一个“添加行”按钮,当按下该按钮时,会将一个空行添加到数据表中。空白行显示在DATAGRID微调上,但未被选中。我想自动选择新行,但我不知道如何执行此操作。我想我需要设置SelectedItem,但我还不知道是什么。有什么帮助吗?谢谢。根据此线程(),您可以使用。基本上创建一个全
<DataGrid Grid.Row="1" DataContext="{Binding}" Name="dataGridEditTab"
我有一个“添加行”按钮,当按下该按钮时,会将一个空行添加到数据表中。空白行显示在DATAGRID微调上,但未被选中。我想自动选择新行,但我不知道如何执行此操作。我想我需要设置SelectedItem,但我还不知道是什么。有什么帮助吗?谢谢。根据此线程(),您可以使用。基本上创建一个全局变量来放置新添加的行索引。在EventArgs中为该索引指定适当的值,然后使用该索引选择要查找的行 如果是MVVM,请为SelectedItem或SelectedIndex使用绑定。如果没有,最好使用它) 要实现您的目标,只需绑定SelectedIndex,无论何时添加行,都将SelectedIndex设置为RowsCount-1 这里有一个例子
<Grid >
<DataGrid AutoGenerateColumns="False" CanUserAddRows="False" ItemsSource="{Binding Path=Persons}" Margin="0,65,0,0"
SelectedIndex="{Binding Path=SelectedIndex, Mode=TwoWay}">
<DataGrid.Columns>
<DataGridTextColumn Header="First name" Binding="{Binding Path=FirstName}" Width="*"/>
<DataGridTextColumn Header="Last name" Binding="{Binding Path=LastName}" Width="*"/>
</DataGrid.Columns>
</DataGrid>
<Button Content="Add new row" Height="23" HorizontalAlignment="Left" Margin="317,12,0,0" Command="{Binding Path=AddCommand}" VerticalAlignment="Top" Width="112" />
</Grid>
要尝试,DataGridCell已被选中。将其用于要选择的行
<Grid >
<DataGrid AutoGenerateColumns="False" CanUserAddRows="False" ItemsSource="{Binding Path=Persons}" Margin="0,65,0,0"
SelectedIndex="{Binding Path=SelectedIndex, Mode=TwoWay}">
<DataGrid.Columns>
<DataGridTextColumn Header="First name" Binding="{Binding Path=FirstName}" Width="*"/>
<DataGridTextColumn Header="Last name" Binding="{Binding Path=LastName}" Width="*"/>
</DataGrid.Columns>
</DataGrid>
<Button Content="Add new row" Height="23" HorizontalAlignment="Left" Margin="317,12,0,0" Command="{Binding Path=AddCommand}" VerticalAlignment="Top" Width="112" />
</Grid>
public class MainViewModel : INotifyPropertyChanged
{
private int _selectedPerson;
public MainViewModel()
{
AddCommand = new RelayCommand(AddAndSelectePerson);
Persons = new DataTable();
Persons.Columns.Add("FirstName");
Persons.Columns.Add("LastName");
Persons.Rows.Add("Alexandr", "Puskin");
Persons.Rows.Add("Lev", "Tolstoy");
}
public ICommand AddCommand { get; private set; }
public int SelectedIndex
{
get { return _selectedPerson; }
set
{
_selectedPerson = value;
OnPropertyChanged("SelectedIndex");
}
}
public DataTable Persons { get; private set; }
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
#endregion
private void AddAndSelectePerson()
{
Persons.Rows.Add();
SelectedIndex = Persons.Rows.Count - 1;
}
protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
}
public class RelayCommand : ICommand
{
private readonly Action _actionToExecute;
public RelayCommand(Action actionToExecute)
{
_actionToExecute = actionToExecute;
}
#region ICommand Members
public void Execute(object parameter)
{
_actionToExecute();
}
public bool CanExecute(object parameter)
{
return true;
}
public event EventHandler CanExecuteChanged;
#endregion
}
public class Person
{
public Person()
{
}
public Person(string firstName, string lastName)
{
FirstName = firstName;
LastName = lastName;
}
public string FirstName { get; set; }
public string LastName { get; set; }
}