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我想通過使用Gridview控件製作一個項目，我可以編輯，更新和刪除我的對象，每當我存儲新對象時，我都會收到dbclosed異常錯誤。其實我找不到錯誤。我在.NET中使用DB4o編程非常新，我無法找到任何可以學習基礎知識的優秀源代碼，因此任何引用都將完全讚賞。提前致謝。在Gridview中更新Db4objects.Db4o.Ext.DatabaseClosedException
//頁面加載
Db4oService.OpenDB();
using (var patientdbcontainer = Db4oService.PatientDBContainer)
{
var list = patientdbcontainer.Query<Patient>(typeof(Patient)).ToList<Patient>();
GridView1.DataSource = list;
GridView1.DataBind();
}
//更新
public void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//var ID = new Guid((string)e.NewValues["ID"]);
// var Name = (string)e.NewValues["Name"];
// var IMEI = long.Parse(e.NewValues["IMEI"].ToString());
Patient updatedPatient = new Patient()
{
ID = new Guid((string)e.NewValues["ID"]),
IMEI =long.Parse(e.NewValues["IMEI"].ToString()),
Name = (string)e.NewValues["Name"]
};
Patient deprecatedPatient;
using (var patientdbcontainer = Db4oService.PatientDBContainer)
{
deprecatedPatient = patientdbcontainer.Query<Patient>(typeof(Patient)).Where<Patient>(n => n.ID == (new Guid((string)e.NewValues["ID"]))).FirstOrDefault<Patient>();
// deprecatedPatient.Name = ((TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0]).Text;
deprecatedPatient.ID = updatedPatient.ID;
deprecatedPatient.Name = updatedPatient.Name;
patientdbcontainer.Delete(deprecatedPatient);
patientdbcontainer.Store(updatedPatient);
patientdbcontainer.Commit();
GridView1.EditIndex = -1;
GridView1.DataBind();
}
你能後的堆棧跟蹤？ – Gamlor