Selles artiklis viidatakse järgmistele Microsoft .NET raamistik klassiteegi nimeruumidele.
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System.Data
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System.Data.OleDb
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System.Data.SqlClient
Sümptomid
Kui kasutate microsoft OLE DB provider for SQL Server (OLEDBSQL) ADO.NET, kui proovite seansi ajal käivitada mitu tehingut, kuvatakse järgmine tõrketeade:
System.Data.OleDb.OleDbException: selle seansi rohkem tehinguid ei saa käivitada
Põhjus
Ole db provider for SQL Server not not nested transactions ( OLE DB provider for SQL Server) ei luba pesastatud tehinguid.
Lisateave
Käitumise reprodutseerimise juhised
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Käivitage Microsoft Visual Studio .NET.
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Looge Windows .NET-Visual Basic rakendusprojekt. Form1 luuakse vaikimisi.
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Akna Kood avamiseks topeltklõpsake nuppu Form1.
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Asendage vorm1 kood järgmise koodiga:
Imports System.Data
Imports System.Data.OleDb
Imports System.Data.SqlClient
Public Class Form1
Inherits System.Windows.Forms.Form
Dim cn As New OleDb.OleDbConnection()
Dim cmd As New OleDb.OleDbCommand()
Dim mycmd As New OleDb.OleDbCommand()
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.Container
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.Name = "Form1"
Me.Text = "Form1"
End Sub
#End Region
Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
cn.ConnectionString = "Provider=SQLOLEDB;Data Source=YourServer;" & _
"Initial Catalog=pubs;User ID=YourUserID;Password=YourPassword"
cn.Open()
cmd.Connection = cn
mycmd.Connection = cn
cmd.CommandText = "Insert into stores (stor_id) values('9876')"
Dim myTrans As OleDb.OleDbTransaction
myTrans = cn.BeginTransaction(IsolationLevel.ReadCommitted)
cmd.Transaction = myTrans
Try
cmd.ExecuteNonQuery()
myTrans.Begin()
myTrans.Commit()
Catch ex As Exception
MessageBox.Show(ex.ToString)
End Try
End Sub
End Class -
Muutke ühendusstringi vastavalt oma keskkonnale.
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Käivitage rakendus. Pange tähele, et kuvatakse jaotises "Tunnused" loetletud tõrge.
Viited
Lisateabe saamiseks klõpsake Microsofti teabebaasi (Knowledge Base) artikli kuvamiseks allolevat artiklinumbrit.
306649 PRB: tõrge, kui juurutate pesastatud tehingu KOOS OLE DB pakkujaga SQL pakkuja