C# Datagrid Tableadapter更新方法失败
我在XAML窗口中放置了一个表,然后修改了代码以使用datagrid上的roweditending事件来更新本地sql数据库。它永远不起作用。我不会在数据库表中添加、更新或删除任何记录 这是xaml代码-C# Datagrid Tableadapter更新方法失败,c#,wpf,datagrid,tableadapter,C#,Wpf,Datagrid,Tableadapter,我在XAML窗口中放置了一个表,然后修改了代码以使用datagrid上的roweditending事件来更新本地sql数据库。它永远不起作用。我不会在数据库表中添加、更新或删除任何记录 这是xaml代码- 这是cs代码 ecpro { /// ///MainWindow.xaml的交互逻辑 /// 公共部分类主窗口:窗口 { 私人AttendanceECPro.AttendanceECProDataSet AttendanceECProDataSet=新AttendanceECProDa
这是cs代码
ecpro
{
///
///MainWindow.xaml的交互逻辑
///
公共部分类主窗口:窗口
{
私人AttendanceECPro.AttendanceECProDataSet AttendanceECProDataSet=新AttendanceECProDataSet();
私有AttendanceCPRO.AttendanceCProDataSetTableAdapters.AttenderTableAdapter AttendanceCProDataSetAttenderTableAdapter=新AttendanceCPRO.AttendanceCProDataSetTableAdapters.AttenderTableAdapter();
private System.Windows.Data.CollectionViewSource attenderTableViewSource=新的CollectionViewSource();
公共主窗口()
{
初始化组件();
}
已加载私有无效窗口(对象发送器、路由目标)
{
AttendanceECPro.AttendanceECProDataSet AttendanceECProDataSet=((AttendanceECPro.AttendanceECProDataSet)(此.FindResource(“AttendanceECProDataSet”)));
//将数据加载到表AttenderTable中。您可以根据需要修改此代码。
AttendanceECProDataSetAttenderTableAdapter.Fill(AttendanceECProDataSet.AttenderTable);
System.Windows.Data.CollectionViewSource attenderTableViewSource=((System.Windows.Data.CollectionViewSource)(this.FindResource(“attenderTableViewSource”)));
attenderTableViewSource.View.MoveCurrentToFirst();
}
私有void attenderTableDataGrid_RowEditEnding(对象发送方,DataGridRowEditEndingEventArgs e)
{
if(e.EditAction==DataGridEditAction.Commit)
{
尝试
{
int rc=0;
rc=AttendanceECProDataSetAttenderTableAdapter.Update(AttendanceECProDataSet.AttenderTable);
AttendanceCproDataSet.AcceptChanges();
MessageBox.Show(“返回代码:+rc”);
}
捕获(例外情况除外)
{
Show(例如ToString());
}
显示(“正在尝试更新…”);
}
}
}
}
返回代码为0,因此不会更新任何行。它从不在两次运行之间保存数据。我还检查了数据集属性是否为“不复制”,并已将.mdf文件的一个版本复制到bin/debug目录中。我已经花了将近一个星期的时间来研究这个问题,但我没有发现我遗漏了什么。但任何更改、添加的行或修改的行都不会更新数据库。网格没有给我错误,catch/try块也没有
此外,数据库中的“AttenderTable”上有一个主键“AttenderID”,设置为identity seed 1 increment 1,并设置为主键。它应该每次都自动递增,我没有一个项目,因为它不应该被用户触摸。我不认为这是一个问题,因为数据库应该更新它
请帮助我在什么事件中使用tableadapter更新方法。。。其他人使用RowEditEnding事件并说他们让它工作了,但我一辈子都不知道该怎么做。答案是将.update方法移动到datagrid的SelectionChanged事件。请参阅上面的评论。我将更新移动到datagrid的SelectionChanged事件,效果良好。此时,数据集中已更新了对datagrid的更改,.update方法随后将这些更改传递到数据库。我还向Window_Closing方法添加了相同的代码,以便在使用离开程序之前,它将在最后一分钟更新任何更改。
<Grid DataContext="{StaticResource attenderTableViewSource}">
<DataGrid x:Name="attenderTableDataGrid" AutoGenerateColumns="False" EnableRowVirtualization="True" ItemsSource="{Binding}" Margin="10,10,10,325" RowDetailsVisibilityMode="VisibleWhenSelected" IsSynchronizedWithCurrentItem="True" RowEditEnding="attenderTableDataGrid_RowEditEnding" >
<DataGrid.Columns>
<DataGridTextColumn x:Name="first_NameColumn" Binding="{Binding First Name, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="First Name" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="last_NameColumn" Binding="{Binding Last Name, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="Last Name" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="address_Line_1Column" Binding="{Binding Address Line 1, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="Address Line 1" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="address_Line_2Column" Binding="{Binding Address Line 2, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="Address Line 2" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="address_Line_3Column" Binding="{Binding Address Line 3, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="Address Line 3" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="cityColumn" Binding="{Binding City, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="City" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="stateColumn" Binding="{Binding State, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="State" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="zipColumn" Binding="{Binding Zip, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="Zip" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="telephoneColumn" Binding="{Binding Telephone, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="Telephone" Width="SizeToHeader"/>
<DataGridCheckBoxColumn x:Name="_Member_Column" Binding="{Binding Member?, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="Member?" Width="SizeToHeader"/>
<DataGridCheckBoxColumn x:Name="_Child_Column" Binding="{Binding Child?, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True, Mode=TwoWay}" Header="Child?" Width="SizeToHeader"/>
</DataGrid.Columns>
</DataGrid>
</Grid>
namespace AttendanceRecPro
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private AttendanceRecPro.AttendanceRecProDataSet attendanceRecProDataSet = new AttendanceRecProDataSet();
private AttendanceRecPro.AttendanceRecProDataSetTableAdapters.AttenderTableTableAdapter attendanceRecProDataSetAttenderTableTableAdapter = new AttendanceRecPro.AttendanceRecProDataSetTableAdapters.AttenderTableTableAdapter();
private System.Windows.Data.CollectionViewSource attenderTableViewSource = new CollectionViewSource();
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
AttendanceRecPro.AttendanceRecProDataSet attendanceRecProDataSet = ((AttendanceRecPro.AttendanceRecProDataSet)(this.FindResource("attendanceRecProDataSet")));
// Load data into the table AttenderTable. You can modify this code as needed.
attendanceRecProDataSetAttenderTableTableAdapter.Fill(attendanceRecProDataSet.AttenderTable);
System.Windows.Data.CollectionViewSource attenderTableViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("attenderTableViewSource")));
attenderTableViewSource.View.MoveCurrentToFirst();
}
private void attenderTableDataGrid_RowEditEnding(object sender, DataGridRowEditEndingEventArgs e)
{
if ( e.EditAction == DataGridEditAction.Commit )
{
try
{
int rc = 0;
rc = attendanceRecProDataSetAttenderTableTableAdapter.Update(attendanceRecProDataSet.AttenderTable);
attendanceRecProDataSet.AcceptChanges();
MessageBox.Show("Return Code: " + rc);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
MessageBox.Show("trying to update...");
}
}
}
}