[英]Can't update Local Database using WPF Datagrid & DataAdapter
我試圖將對DataGrid所做的更改反映到本地數據庫(在這種情況下為SQL Server Compact Edition),但失敗。 這是代碼:
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視圖的名稱。 我做錯了什么嗎? 提前致謝 :-)
這是對我有用的代碼。 除使用我的localDB數據庫(非CE)外,它與您的相似。 另外,請確保在VS外部測試代碼,否則數據庫文件可能會在編譯/執行周期中被覆蓋,並且您將永遠無法看到更改反映在數據庫中。
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);
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.