如何從數據庫中的表中拉選定的數據

我希望成功地允許用戶登錄後，將選定的記錄內容放入標籤，但這不起作用，我不知道如何解決它。如何從數據庫中的表中拉選定的數據

Public dbName As String = "DB.accdb" 
Public dbConnexStr As String = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=" & dbName 
Public dbConnector As OleDbConnection = New OleDbConnection(dbConnexStr) 
Public SQL_Str As String 
Public dbCommand As OleDbCommand 
Public dbDataSet As DataSet = New DataSet("DataSetWJECComp") 
Public dbDataAdapter As OleDbDataAdapter 
Public dbSource As BindingSource 
Public dbCommandBuilder As OleDbCommandBuilder 

Private Sub BtnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnLogin.Click 
    If LoginDetailsSearch() = True Then 
     dbDataAdapter = New OleDbDataAdapter(SQL_Str, dbConnector) 
     dbDataAdapter.Fill(dbDataSet, "Selected Customer Details") 
     Label5.Text = dbDataSet.Tables("Selected Customers Details").Rows(0).Item(0) 
    Else 
     MsgBox("The E-Mail address or password you entered is not valid, please check your entries and try again.", MsgBoxStyle.Critical, "Error") 
    End If 
End Sub 
Function LoginDetailsSearch() As Boolean 
    dbConnector.Open() 
    SQL_Str = "SELECT count(UserID) FROM Table_UserDetails WHERE EmailAddress ='" & txtEmail.Text & "' AND UserPassword = '" & txtPassword.Text & "'" 
    Dim LoginCommand = New OleDbCommand(SQL_Str, dbConnector) 
    Dim RecordFinder = LoginCommand.ExecuteScalar 
    LoginDetailsSearch = (1 = CStr(RecordFinder)) 
    dbConnector.Close() 

End Function

所以選擇當您正確輸入相匹配的記錄的電子郵件地址和密碼的記錄，但我怎麼拉戰績進入標籤的其他領域？那麼用戶的名字變成標籤等？

來源

2013-10-31 user2177940

我收到錯誤「對象引用未設置爲對象的實例」。在Label5.Text = dbDataSet.Tables（「Selected Customers Details」）。行（0）.Item（0） – user2177940

喲已拼寫您的表名錯誤：選定的客戶詳細信息和選定的客戶* s *詳情。我建議你將它聲明爲一個字符串並替換這個變量名稱，而不是輸入兩次。

來源

2013-10-31 18:13:07 majjam

如何從數據庫中的表中拉選定的數據

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