1
當我按下按鈕時,我希望將Sname和SNo寫入數據庫。這裏是我的代碼:無法寫入訪問數據庫
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim ConnString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Documents and Settings\cerns1\Local Settings\Application Data\Temporary Projects\WindowsApplication1\testdb.accdb"
Dim cnn As New OleDbConnection(ConnString)
' Create a new row.
Dim newStudentRow As testdbDataSet.StudentRow
newStudentRow = Me.TestdbDataSet.Student.NewStudentRow()
' Save the new row to the database
Dim i As Integer = 2
Dim SNo As Integer = 1
Do While i > 1
cnn.Open()
'StudentTableAdapter.Insert("WOW", SNo)
Me.TestdbDataSet.Student.Rows.Add(newStudentRow)
Me.StudentTableAdapter.Update(Me.TestdbDataSet.Student)
SNo = SNo + 1
i = i + 1
cnn.Close()
Loop
End Sub
執行後,沒有信息在Access數據庫中添加或更改。
那麼,這是什麼問題? –
只是一個提示:這段代碼會讓你的程序崩潰。只要我大於1,循環就會進行,並且每次迭代時你都將1加1。在每次迭代中打開和關閉連接都不好,打開一次並在完成操作後關閉它。 – Abbas
@ Bill Gregg它會毫無問題地運行,但不會保存到訪問數據庫。當我打開數據庫後仍然是一樣的。 –