首先,我是 VB 新手,这是我第一个使用 OleDBConnection 的项目。
好的,所以我正在尝试使用 oleDbConnection 做最简单的事情(我假设)。我只想从 Access DB 中的表中读取数据,并将该信息显示到我的 winForm 中的保管箱(或任何东西)。
Public Class QueManger
Dim dbConnection As OleDbConnection
Dim dbCommand As OleDbCommand
Dim dbDataAdapter As OleDbDataAdapter
Dim ConnectString As String = "Provider = Microsoft.Jet.OLEDB.4.0;" & "Data Source = \\atrts10\F:\Applications\ATRTaxCert\Development\mtaylor\TaxCert_be_test.accdb"
Dim dtMain As DataTable
Private Sub QueManger_Load(sender As Object, e As EventArgs) Handles MyBase.Load
StatusName()
End Sub
Private Sub StatusName()
Dim taxconn As OleDbConnection
Try
taxconn = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\\atrts10\F:\Applications\ATRTaxCert\Development\mtaylor\TaxCert_be_test.accdb")
Dim taxcmd As OleDbCommand = taxconn.CreateCommand
taxcmd.CommandText = "SELECT StatusName FROM Status ORDER BY StatusName"
Dim rdr2 As OleDbDataReader
If taxconn.State = ConnectionState.Closed Then
taxconn.Open()
End If
rdr2 = taxcmd.ExecuteReader
'boxStatus.Items.Add("All")
While rdr2.Read()
boxClient.Items.Add(rdr2.Item("StatusName"))
End While
Catch ex As Exception
Finally
taxconn.Close()
End Try
End Sub
当它尝试运行“taxconn.Open()”函数时出现错误。
错误提示“Microsoft Access 数据库引擎无法打开或写入文件 '\atrts10\F:\Applications\ARTtaxCert\Development\mtaylor\TaxCert_be_test.accdb'。它已被其他用户以独占方式打开,或者您需要权限才能查看和写入其数据。”
有什么想法吗?