Ovaj se članak odnosi na sljedeće prostore naziva biblioteke .NET Framework razredne biblioteke:
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System.Data
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System.Data.OleDb
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System.Data.SqlClient
Simptomi
Kada u aplikaciji SQL Server (OLEDBSQL) koristite Microsoft OLE DB provider za ADO.NET, ako pokušate pokrenuti više transakcija u sesiji, primit ćete sljedeću poruku o pogrešci:
System.Data.OleDb.OleDbException: Nije moguće pokrenuti više transakcija u ovoj sesiji
Uzrok
Ole DB davatelj usluga po dizajnu za SQL Server ne dopušta ugniježđene transakcije.
Dodatne informacije
Koraci za reprodukciju ponašanja
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Pokrenite Microsoft Visual Studio .NET.
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Stvorite projekt Windows aplikacije u Visual Basic .NET. Obrazac1 po zadanom se stvara.
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Dvokliknite Obrazac1 da biste otvorili prozor Kod.
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Kod u obrascu1 zamijenite sljedećim kodom:
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 -
Izmijenite niz za povezivanje u skladu s okruženjem.
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Pokrenite aplikaciju. Obratite pozornost na pogrešku navedenu u odjeljku "Simptomi".
Reference
Dodatne informacije potražite u članku iz Microsoftove baze znanja pod brojem
306649 PRB: pogreška prilikom implementacije ugniježđene transakcije s OLE DB davateljem usluga za SQL davatelja usluga