Ovaj članak se odnosi na sledeće prostore za imena Microsoft .NET Framework biblioteci razreda:
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System.Data
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System.Data.OleDb
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System.Data.SqlClient
Simptomi
Kada koristite Microsoft OLE DB dobavljač za SQL Server (OLEDBSQL) u programu ADO.NET, ako pokušate da pokrenete više transakcija u sesiji, dobijate sledeću poruku o grešci:
System.Data.OleDb.OleDbException: Nije moguće započeti više transakcija u ovoj sesiji
Uzrok
OLE DB dobavljač za uslugu SQL Server po dizajnu ne dozvoljava ugnežđene transakcije.
Više informacija
Steps to Repproduce the Behavior
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Pokrenite Microsoft Visual Studio .NET.
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Kreirajte projekat Windows aplikacije" u Visual Basic .NET. Obrazac1 se podrazumevano kreira.
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Kliknite dvaput na Obrazac1 da biste otvorili prozor Kôd.
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Zamenite kôd u obrascu1 sledećim 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 -
Izmenite nisku veze koja odgovara okruženju.
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Pokrenite aplikaciju. Obratite pažnju na to da dobijate grešku koja je navedena u odeljku "Simptomi".
Reference
Za dodatne informacije kliknite na broj članka u nastavku da biste videli članak u Microsoft bazi znanja:
306649 PRB: Greška prilikom primene ugnežđene transakcije sa OLE DB dobavljačem za SQL dobavljača