Internal .net Framework Data Provider Error 12
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Internal .net Framework Data Provider Error 1025
community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Internal .Net Framework Data Provider error 1 up vote 4 down vote favorite I'm developing a WinForm app with Visual Studio 2012 Ultimate edition with all service pack, C# and .NET Framework 4.5. I get this exception: Internal .Net Framework Data Provider error 1 With this stack: en System.Data.ProviderBase.DbConnectionInternal.PrePush(Object expectedOwner) en System.Data.ProviderBase.DbConnectionPool.PutObject(DbConnectionInternal obj, Object owningObject) en System.Data.ProviderBase.DbConnectionInternal.CloseConnection(DbConnection owningObject, DbConnectionFactory connectionFactory) en System.Data.SqlClient.SqlConnection.CloseInnerConnection() en System.Data.SqlClient.SqlConnection.Close() en AdoData.TRZIC.DisposeCurrentConnection() en AdoData.TRZIC.Finalize() In the destructor: ~TRZIC() { DisposeCurrentConnection(); if (this.getCodeCmd != null) this.getCodeCmd.Dispose(); } private void DisposeCurrentConnection() { if (this.conn != null) { if (this.conn.State == ConnectionState.Open) this.conn.Close(); this.conn.Dispose(); this.conn = null; } } I get the exception in line this.conn.Close();. And conn is private SqlConnection conn = null; Do you know why? c# .net winforms ado.net share|improve this question edited Apr 9 '14 at 12:42 asked Apr 9 '14 at 12:36 VansFannel 14.1k57230409 There are some mistakes, you doesn't need to this.conn=null; after disposing it, and also I suggest to dispose your command before calling DisposeCurrentConnection() –RezaRahmati Apr 9 '14 at 12:48 add a comment| 2 Answers 2 active oldest votes up vote 6 down vote accepted I have found the solution here:
ASP.NET Community Standup Forums Help Home/ASP.NET Forums/Data Access/DataSource Controls - SqlDataSource, ObjectDataSource, etc/System.InvalidOperationException: Internal .Net Framework Data Provid... System.InvalidOperationException: Internal .Net Framework Data Provider error 12. [Answered]RSS 3 replies Last post Sep 25, 2010 05:14 AM by manesh67 ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads Support Options Advanced Search Reply sweetypie Member 3 Points 34 Posts System.InvalidOperationException: Internal .Net Framework Data Provider error 12. Mar 06, 2008 08:13 http://stackoverflow.com/questions/22962742/internal-net-framework-data-provider-error-1 AM|sweetypie|LINK Hi, I have created an application in which there are few forms. Each form has fields which are linked to a backend table/tables. My application is supposed to be accessed by multiple users concurrently. I ran a test where I created a class file in windows application and i ran a for loop in it to https://forums.asp.net/t/1229756.aspx?System+InvalidOperationException+Internal+Net+Framework+Data+Provider+error+12+ call the url of my application. I wanted to test the effect of firing around 200 queries to my query engine. The test code is: namespace MachineGun { static class Program
{ ///I am using .Net Framework 2.0. And http://www.pcreview.co.uk/threads/internal-net-framework-data-provider-error-12.2877001/ for accessing data Oledb data provider. This is used in a multi-threaded windows service. I am getting the following error on a select http://www.dotnetspider.com/forum/272220-Internal-Net-Framework-Data-Provider-error.aspx query. The stack trace is as follows. Internal .Net Framework Data Provider error 12. at System.Data.ProviderBase.DbConnectionInternal.CreateReferenceCollection() at System.Data.ProviderBase.DbConnectionInternal.AddWeakReference(Object value, Int32 tag) at System.Data.OleDb.OleDbConnection.AddWeakReference(Object internal .net value, Int32 tag) at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method) at System.Data.OleDb.OleDbCommand.ExecuteScalar() at File_Transfer.clsDataAccessObject.GetCellValue(String strSql) Anant Kulkarni, Sep 16, 2006 #1 Advertisements Miha Markic [MVP C#] Guest Hi Anant, Does it happens on single thread, too (or in single thread of winforms)? I am asking this because I internal .net framework already saw similar behaviour in one of less known oledb providers.. -- Miha Markic [MVP C#, INETA Country Leader for Slovenia] RightHand .NET consulting & development www.rthand.com Blog: http://cs.rthand.com/blogs/blog_with_righthand/ "Anant Kulkarni" <> wrote in message news:... > Hi, > I am using .Net Framework 2.0. And for accessing data Oledb data > provider. This is used in a multi-threaded windows service. I am > getting the following error on a select query. > > The stack trace is as follows. > > Internal .Net Framework Data Provider error 12. > at > System.Data.ProviderBase.DbConnectionInternal.CreateReferenceCollection() > at > System.Data.ProviderBase.DbConnectionInternal.AddWeakReference(Object > value, Int32 tag) > at System.Data.OleDb.OleDbConnection.AddWeakReference(Object value, > Int32 tag) > at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior > behavior, String method) > at System.Data.OleDb.OleDbCommand.ExecuteScalar() > at File_Transfer.clsDataAccessObject.GetCellValue(String strSql) > Miha Markic [MVP C#], Sep 16, 2006 #2 Advertisements Cowboy \(Gregory A. Beamer
You must Sign In to post a response. Category: ASP.NET06 Dec 2010 02:51anjuJoined:11/09/2008Level:SilverPoints:66Points:1Internal .Net Framework Data Provider error 12.I'm working on asp.net. I have written code like below. Dim comd As OleDb.OleDbCommand = New OleDb.OleDbCommand("select * from staff where name='Sanders' and dept=20", conn) Dim reader As OleDb.OleDbDataReader conn.Open()reader = comd.ExecuteReader()when the line 'reader = comd.ExecuteReader()' gets execute an error occurs like'Internal .Net Framework Data Provider error 12.'What can be the solution?regardsAnju #57209706 Dec 2010 03:07Panamayan PurushothamanJoined:29/01/2008Level:GoldPoints:668Points:4Hi,When you call Fill method of DataAdapter and pass DataSet, did you instantiate DataSet variable or not? You would get this error in a case if you pass variable that was not instantiatedThis is my method: Public Sub ExecuteQuery(ByVal Query As String, ByRef Results As DataSet, Optional ByRef conn As IDbConnection = Nothing, Optional ByRef trans As IDbTransaction = Nothing) If trans Is Nothing Then If m_ConnectionString = "" Then Err.Raise(1000, , "Empty Conn String") conn = New OleDbConnection(m_ConnectionString) Else m_DBConnection = conn End If m_DBCommand = conn.CreateCommand m_DBCommand.CommandText = Query.Trim m_DBCommand.CommandType = CommandType.Text m_DBDataAdapter = New OleDbDataAdapter(m_DBCommand) If trans IsNot Nothing Then m_DBCommand.Transaction = trans If trans Is Nothing Then conn.Open() m_DBDataAdapter.Fill(Results) If m_DBCommand IsNot Nothing Then If m_DBCommand.Parameters.Count > 0 Then m_DBCommand.Parameters.Clear() m_DBCommand.Dispose() m_DBCommand = Nothing End If If trans Is Nothing Then m_DBDataAdapter = Nothing If conn IsNot Nothing Then If conn.State = ConnectionState.Open Then conn.Close() conn.Dispose() End If conn = Nothing End If End If End Suband called this way: Dim sql As String = String.Empty Dim ds As New DataSet...... g_DBMan.ExecuteQuery(sql, ds) Return dsAny kind of help will be appreciated,Thanks,MEEKREDD
Save-Key.docDelete Attachment#57218506 Dec 2010 06:01anjuJoined:11/09/2008Level:SilverPoints:66Points:2This problem only occurs when i use OleDbDataReader.Can any one suggest solution for the error occur for OleDbDataReader.regardsAnju#57220106 Dec 2010 07:10Asheej T KJoined:12/11/2009Level:GoldPoints:43848Points:4Hi Anju,Check below code,
Dim strSQL As String = "select * from staff where name='Sanders' and dept=20"
Dim connString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\Staff.mdb"
Dim conn As OleDbConnection = New OleDbConnection(connString)
conn