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05.31.2008 at 04:48AM PDT, ID: 23446730
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9.0

How to use commit and rollback using ODBC connection with MYSQL and VB.net 2003

Asked by navtarainc in Visual Studio, MySQL Server, .Net Editors & IDEs

Hi Experts,
        I am having problem while using commit and rollback with mysql and vb.net .
I am getting following error at the time of calling " cmd.executeNonQuery"
"Execute requires the command to have a transaction object when the connection assigned to the command is in a pending local transaction.  The Transaction property of the command has not been initialized."

I have attached my test code.
Please help me.

Thanks in advance.Start Free Trial 
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Dim conOdbc As New Odbc.OdbcConnection
    Dim cmd As New Odbc.OdbcCommand
    Dim trans As Odbc.OdbcTransaction
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        connectDatabase()
    End Sub
    Private Sub connectDatabase()
        Dim conStr As String = "DRIVER={MySQL ODBC 3.51 Driver};Server=localhost;PORT=3307;DATABASE=test;User=root;PWD=;option=3;"
        Try
            conOdbc.ConnectionString = conStr
            conOdbc.Open()
            trans = conOdbc.BeginTransaction
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        cmd.Connection = conOdbc
        If conOdbc.State = ConnectionState.Closed Then
            conOdbc.Open()
        End If
        Try
            cmd.CommandText = "insert into test_first (`name`,`age`) values('" & TextBox1.Text & "'," & Val(TextBox2.Text) & ")"
            cmd.ExecuteNonQuery()
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
 
    End Sub
 
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        trans.Rollback()
    End Sub
 
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        trans.Commit()
    End Sub
[+][-]05.31.2008 at 05:23AM PDT, ID: 21683521

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Zones: Visual Studio, MySQL Server, .Net Editors & IDEs
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Solution Provided By: te-knowledge-y
Participating Experts: 1
Solution Grade: B
 
 
 
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