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下面的代碼寫在Timer Tick事件中。只要時間和日期不相同,它就可以正常工作。當時間和日期相同時,它只顯示1條消息。如何顯示同一日期和時間的多個訊息?我認爲這可以完成如果我爲表單創建不同的實例。但我不知道數據庫中會有多少個相同的時間和日期。所以我不能那樣做。有什麼解決辦法嗎?如何創建表單的不同實例
Dim frm As New frmMessage
Dim nowDate As String = String.Format("{0:M/d/yyyy}", DateTime.Now)
Dim nowTime As String = String.Format("{0:h:mm tt}", DateTime.Now)
Dim mySelectQuery As String = "SELECT ReminderID, Date, Time, Subject, Reminder FROM Reminder WHERE Date LIKE '" & nowDate & "' AND Time LIKE '" & nowTime & "'"
Dim myConnString As String = "Data Source=" & Application.StartupPath & "\Database\SimpleDB.db3"
Dim sqConnection As New SQLiteConnection(myConnString)
Dim sqCommand As New SQLiteCommand(mySelectQuery, sqConnection)
sqConnection.Open()
Dim sqReader As SQLiteDataReader = sqCommand.ExecuteReader()
Try
If sqReader.HasRows = True Then
While sqReader.Read()
frm.Show()
If (Not sqReader.IsDBNull(0)) Then
frm.txtID.Text = sqReader.GetInt32(0)
End If
If (Not sqReader.IsDBNull(1)) Then
frm.txtDate.Text = sqReader.GetString(1)
End If
If (Not sqReader.IsDBNull(2)) Then
frm.txtTime.Text = sqReader.GetString(2)
End If
If (Not sqReader.IsDBNull(3)) Then
frm.txtSubject.Text = sqReader.GetString(3)
End If
If (Not sqReader.IsDBNull(4)) Then
frm.txtReminderText.Text = sqReader.GetString(4)
End If
End While
End If
sqReader.Close()
sqConnection.Close()
Catch ex As Exception
MsgBox("Error:" & ex.Message, vbExclamation)
End Try
你是一個天才。感謝隊友:D – 2011-05-01 12:21:16