wpf中DataGrid控件RowDetailsTemplate中无法使用事件

EDN Admin · Jan 7, 2011

wpf开发环境VS2010，.Net4.0 wpf前台代码
<Window x:Class="wpfTech.MainWindow" 
xmlns=" http://schemas.microsoft.com/winfx/2006/xaml/presentation http://schemas.microsoft.com/winfx/2006/xaml/presentation " 
xmlns:x=" http://schemas.microsoft.com/winfx/2006/xaml http://schemas.microsoft.com/winfx/2006/xaml " 
Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded 
<Grid> 
<DataGrid Name="dataGrid1" AutoGenerateColumns="False" Height="235" HorizontalAlignment="Left" 
Margin="42,30,0,0" VerticalAlignment="Top" Width="387" 
ItemsSource="{Binding}" CanUserAddRows="False" 
DataContext="{Binding} 
<DataGrid.Columns> 
<DataGridHyperlinkColumn Header="附件名称" Width="197" Binding="{Binding Path=_name, Mode=TwoWay}" /> 
<DataGridTextColumn Header="修改日期" Width="80" Binding="{Binding Path=_time,Mode=TwoWay}"/>
 
</DataGrid.Columns> 
<DataGrid.RowDetailsTemplate> 
<DataTemplate > 
<DataGrid Name="dataGridDetail" ItemsSource="{Binding _child}" AutoGenerateColumns="False 
<DataGrid.Columns> 
<DataGridTextColumn Header="there" Binding="{Binding sdf}"/> 
<DataGridTemplateColumn> 
<DataGridTemplateColumn.CellTemplate> 
<DataTemplate > 
<Button Name="buttonTest"
Content="{Binding abc}" Click="Button_Click" /> 
</DataTemplate> 
</DataGridTemplateColumn.CellTemplate> 
</DataGridTemplateColumn>
 
</DataGrid.Columns> 
</DataGrid> 
</DataTemplate> 
</DataGrid.RowDetailsTemplate> 
</DataGrid> 
 
</Grid> 
</Window> 
后台代码：
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Data; 
using System.Windows.Documents; 
using System.Windows.Input; 
using System.Windows.Media; 
using System.Windows.Media.Imaging; 
using System.Windows.Navigation; 
using System.Windows.Shapes; 
using System.IO;
namespace wpfTech 
{ 
/// <summary> 
/// MainWindow.xaml 的交互逻辑 
/// </summary> 
public partial class MainWindow : Window 
{ 
static public List<data> listdata = new List<data>();
 
public MainWindow() 
{ 
InitializeComponent();
listdata.Add(new data() { _name = "abc", _time = "abctime", _child = new List<file> { new file() { abc = "1", sdf = "4" }, new file() { abc = "2", sdf = "3" } } }); 
 
listdata.Add(new data() { _name = "def", _time = "deftime", _child = new List<file> { new file() { abc = "79", sdf = "0-" } } }); 
 
listdata.Add(new data() { _name = "ghi", _time = "ghitime", _child = new List<file> { new file() { abc = "qwe", sdf = "rt5y" } } }); 
dataGrid1.ItemsSource = listdata; 
}
private void Window_Loaded(object sender, RoutedEventArgs e) 
{ 
} 
private void showit(string id) 
{ 
MessageBox.Show(id); 
} 
private void Button_Click(object sender, RoutedEventArgs e) 
{
}
} 
public class data 
{ 
public string _name{get;set;} 
public string _time {get;set;} 
public List<file> _child { get; set; } 
} 
public class file 
{ 
public string abc { get; set; } 
public string sdf { get; set; } 
} 
} 
编译运行时，当点击DataGrid的某行，意愿是显示详细信息DataGrid。但由于详细信息的DataGrid中buttonTest控件上有Click方法，导致出现â未将对象引用设置到对象的实例。â错误，没有调用堆栈信息。
事实上，在详细信息DataGrid中的行上，添加事件处理，都会导致上述错误。
但我必须实现显示详细信息DataGrid的行，并且在行的cell上注册事件。
请问为什么会出现这样的错误，如何解决？

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wpf中DataGrid控件RowDetailsTemplate中无法使用事件

EDN Admin

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