[英]Can't update Local Database using WPF Datagrid & DataAdapter
我试图将对DataGrid所做的更改反映到本地数据库(在这种情况下为SQL Server Compact Edition),但失败。 这是代码:
SqlCeConnection conn;
SqlCeDataAdapter dataAdapter;
public MainWindow()
{
InitializeComponent();
Init();
}
public void Init()
{
try
{
conn = new SqlCeConnection(@"Data Source = DataModel.sdf");
dataAdapter = new SqlCeDataAdapter("Select * from Members", conn);
SqlCeCommandBuilder commandBuilder = new SqlCeCommandBuilder(dataAdapter);
DataTable dataTable = new DataTable();
dataAdapter.Fill(dataTable);
dataTable.RowChanged += dataTable_RowChanged;
dataTable.RowDeleted += dataTable_RowDeleted;
membersDataGrid.ItemsSource = dataTable.DefaultView;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
void dataTable_RowDeleted(object sender, DataRowChangeEventArgs e)
{
dataAdapter.Update(sender as DataTable);
}
void dataTable_RowChanged(object sender, DataRowChangeEventArgs e)
{
dataAdapter.Update(sender as DataTable);
}
MembersDataGrid是UI中的DataGrid视图的名称。 我做错了什么吗? 提前致谢 :-)
这是对我有用的代码。 除使用我的localDB数据库(非CE)外,它与您的相似。 另外,请确保在VS外部测试代码,否则数据库文件可能会在编译/执行周期中被覆盖,并且您将永远无法看到更改反映在数据库中。
private void DataGrid_Loaded(object sender, RoutedEventArgs e)
{
string connstr = ConfigurationManager.ConnectionStrings["WpfApplication14.Properties.Settings.NorthwindConnectionString"].ToString();
SqlConnection conn = new SqlConnection(connstr);
CustomersTableAdapter adapter = new CustomersTableAdapter();
NorthwindDataSet.CustomersDataTable table = new NorthwindDataSet.CustomersDataTable();
adapter.Fill(table);
dataGrid1.ItemsSource = table.DefaultView;
table.RowChanged += table_RowChanged;
}
void table_RowChanged(object sender, System.Data.DataRowChangeEventArgs e)
{
using (CustomersTableAdapter adapter = new CustomersTableAdapter())
{
adapter.Update(sender as NorthwindDataSet.CustomersDataTable);
}
}
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