AcquireConnection Returns Null Value

Mar 18, 2007

I have the following code in my custom source component's AcquireConnection method -

if (ComponentMetaData.RuntimeConnectionCollection[0].ConnectionManager != null)

{

ConnectionManager cm = Microsoft.SqlServer.Dts.Runtime.DtsConvert.ToConnectionManager(ComponentMetaData.RuntimeConnectionCollection[0].ConnectionManager);

ConnectionManagerAdoNet cmado = cm.InnerObject as ConnectionManagerAdoNet;

if (cmado == null)

throw new Exception("The ConnectionManager " + cm.Name + " is not an ADO.NET connection.");

// Get the underlying connection object.
this.oledbConnection = cmado.AcquireConnection(transaction) as OleDbConnection;

if (oledbConnection == null)

throw new Exception("The ConnectionManager is not an ADO.NET connection.");

isConnected = true;

}

The value of oledbConnection is null.

I am trying to invoke the above method within a package that I am trying to create dynamically. Any help ?

private const string ADONETConnectionString = "Provider=SQLOLEDB.1;Data Source={0};Initial Catalog={1};Integrated Security=True;";

ConnectionManager PubTRCM = package.Connections.Add("ADO.NET:OLEDB");

PubTRCM.Name = "PubTR";

PubTRCM.ConnectionString = String.Format(ADONETConnectionString, paramPubServer, paramPubTRDB);

#region Create OLEDB Source Component

//Create a OLEDB Source Component
IDTSComponentMetaData90 Source = dataFlow.ComponentMetaDataCollection.New();
Source.Name = "OLEDBSource";

Source.ComponentClassID = typeof(Microsoft.Samples.SqlServer.Dts.AdoSourceSample).AssemblyQualifiedName;

//Get the design time instance of the source
CManagedComponentWrapper SourceDesignTime = Source.Instantiate();

//Initialize the component
SourceDesignTime.ProvideComponentProperties();

if (Source.RuntimeConnectionCollection.Count > 0)
{
Source.RuntimeConnectionCollection[0].ConnectionManagerID = PubTRCM.ID;
Source.RuntimeConnectionCollection[0].ConnectionManager = DtsConvert.ToConnectionManager90(PubTRCM);
}

SourceDesignTime.SetComponentProperty("SqlStatement", "Select PlantId from PlantDim");

//Reinitialize the metadata
SourceDesignTime.AcquireConnections(null);
SourceDesignTime.ReinitializeMetaData();
SourceDesignTime.ReleaseConnections();

#endregion

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AcquireConnection Returns Null

May 15, 2006

Hi,

we are facing some issue to get the underlying OledbConnection from the runtime ConnectionManager.

below is the code sample that we are using

IDtsConnectionService conService = (IDtsConnectionService)this.serviceProvider.GetService(typeof(IDtsConnectionService));

if (conService == null)

return;

ArrayList conCollection = conService.GetConnectionsOfType("OLEDB");

for (int count = 0; count < conCollection.Count; count++)

{

string conName = ((ConnectionManager)conCollection[count]).Name;

if (conName == conMgrname)

{

conMgr = DtsConvert.ToConnectionManager90((ConnectionManager)conCollection[count]);

ConnectionManager cm = DtsConvert.ToConnectionManager(conMgr);

Microsoft.SqlServer.Dts.Runtime.Wrapper.ConnectionManagerAdoNet cmado = cm.InnerObject as Microsoft.SqlServer.Dts.Runtime.Wrapper.ConnectionManagerAdoNet;

OleDbConnection conn= cmado.AcquireConnection(null) as OleDbConnection;

}

}

In the sample above the conn is null.



To this query Darren replied to use the connection of type ADO.NET:System.Data.OleDb.OleDbConnection, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 to create the connection.

Your call to GetConnectionsOfType("OLEDB"); will return native OLE-DB connections, not ADO.NET connections, using the OleDbConnection.

The connection type for the ADo>NET OLE-DB connection is -

ADO.NET:System.Data.OleDb.OleDbConnection, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089


but if user creates an New OLEDB Connection from the Connection Manager panel of the BIDS and selects the same from the custom UI how to get the underlying OLEDBConnection? the CreationName in this case is "OLEDB" and not ADO.NET:System.Data.OleDb.OleDbConnection, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089.

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Hello.

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And it works as expected, except when I use NULL:

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I find it weird when decrypting a column from a baked up database and restoring it to another database. Here's the scenario:

Server1 has Database1.
Database1 has Table1 with two columns encyrpted -- Card Number and SS Number
Encryption and decryption in this Database1 is perfectly fine. Records are encrypted and can be decrypted too.
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CREATE SYMMETRIC KEY myKey WITH ALGORITHM = DES
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Go

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-- I then verified if the key is opened
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If I create a new database, say Database2 from that Server2, create table, master key, certificate, and symmetric key. Encrpytion and decryption on Database2 will work!




Any suggestions gurus? I tried all searches and help for almost 2 weeks regarding this issue but nobody could resolve this.

Thanks in advance!



faiga16



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//////////////////////////////////////////////////////////////////////////////////////////////////////
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Please, this is very important for me, so every tip or shared thought could be very helpfull.



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Jan 21, 2008

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It seems that the EncryptByKey function occasionally returns a value that can not be decrypted at a later point in time.

I am running on Windows XP Professional SP 2 with SQL Server 9.0.3042.

I have included a sample of the code below.

Thank you,
Mike

CREATE FUNCTION [dbo].[encrypt_text]
(
@input_text varchar(255)
)
RETURNS varbinary(8000)
AS
BEGIN
RETURN EncryptByKey(Key_GUID('eia_key'), @input_text)
END



CREATE FUNCTION decrypt_text
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)
RETURNS varchar(255)
AS
BEGIN
return convert(varchar(255),DecryptByKey(@input_text))

END



IF EXISTS (SELECT * FROM sys.symmetric_keys WHERE name = N'eia_key')

DROP SYMMETRIC KEY eia_key


CREATE SYMMETRIC KEY eia_key

WITH ALGORITHM = DES

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OPEN SYMMETRIC KEY eia_key DECRYPTION BY PASSWORD = '???'


execute util_print 'Deleting data'

execute ld_delete_lips_data

execute util_print 'Loading data'



set nocount on

insert into maturities (maturity_id, maturity_name, minimum_maturity, maximum_maturity)

values (1, 'TERM', 0, 0)

insert into maturities (maturity_id, maturity_name, minimum_maturity, maximum_maturity)

values (2, '0 - 2', 0, 2)

insert into maturities (maturity_id, maturity_name, minimum_maturity, maximum_maturity)

values (3, '2 - 5', 2, 5)

insert into maturities (maturity_id, maturity_name, minimum_maturity, maximum_maturity)

values (4, '5 - 10', 5, 10)

insert into maturities (maturity_id, maturity_name, minimum_maturity, maximum_maturity)

values (5, '10+', 10, null)

insert into forecast_horizons (forecast_horizon_id, forecast_horizon_name, forecast_horizon_alias)

values (1, dbo.encrypt_text('3 Month'), dbo.encrypt_text('Blended'))

insert into forecast_horizons (forecast_horizon_id, forecast_horizon_name, forecast_horizon_alias)

values (2, dbo.encrypt_text('1 Year'), dbo.encrypt_text('Fundamental'))

insert into forecast_horizons (forecast_horizon_id, forecast_horizon_name, forecast_horizon_alias)

values (3, dbo.encrypt_text('Technical'), dbo.encrypt_text('Technical'))



insert into forecast_levels (forecast_level_id, forecast_level_name)

values (1, dbo.encrypt_text('Low'))

insert into forecast_levels (forecast_level_id, forecast_level_name)

values (2, dbo.encrypt_text('Median'))

insert into forecast_levels (forecast_level_id, forecast_level_name)

values (3, dbo.encrypt_text('High'))



execute util_reseed_ident 'asset_classes', 0

execute util_execute_sql 'insert into asset_classes default values', 11

insert into sectors (sector_id, sector_name)

values (1, dbo.encrypt_text('Sovereign'))

insert into sectors (sector_id, sector_name)

values (2, dbo.encrypt_text('Inflation Linked'))

insert into sectors (sector_id, sector_name)

values (3, dbo.encrypt_text('Quasi & Foreign Government'))

insert into sectors (sector_id, sector_name)

values (4, dbo.encrypt_text('Securitized/Collateralized'))

insert into sectors (sector_id, sector_name)

values (5, dbo.encrypt_text('Corporate'))

insert into credit_ratings (credit_rating_id, credit_rating_name)

values (6, dbo.encrypt_text('AAA'))

insert into credit_ratings (credit_rating_id, credit_rating_name)

values (7, dbo.encrypt_text('AA'))

insert into credit_ratings (credit_rating_id, credit_rating_name)

values (8, dbo.encrypt_text('A'))

insert into credit_ratings (credit_rating_id, credit_rating_name)

values (9, dbo.encrypt_text('BBB'))

insert into sectors (sector_id, sector_name)

values (10, dbo.encrypt_text('High Yield'))

insert into sectors (sector_id, sector_name)

values (11, dbo.encrypt_text('Emerging Debt'))



set nocount off

insert into currencies (currency_id, currency_name, currency_code)

select CurrencyID, dbo.encrypt_text(CurrencyName), dbo.encrypt_text(CurrencyCode)

from lips_import..Currencies

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DECLARE @a nvarchar(400);

DECLARE @b nvarchar(400);

DECLARE @c nvarchar(400);

SET @x=N'<SuchKriterienDataSet xmlns="http://tempuri.org/SuchKriterienDataSet.xsd">

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returns



Test1 Test2 Test3

Test1 NULL Test3



instead of



Test1 Test2 Test3

Test1 Test2 Test3



This is the shortest repro I could assemble. Once you increase the number of variables, a random pattern of dropped values emerges.



I could repro on fully patched Windows XP German w/ SSEE ENU and Windows Server 2003 64-bit w/ SSEE GER.



Any workaround highly appreciated.

Thx,

Henry

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Code Snippet

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Hi

I have stupid users... who doesn't?! They have entered carriage returns as a whole value in some fields, that is, the field contains nothing more than a carriage return.

I really need to treat these cases as nulls and have successfully removed whole fields of nothing but spaces by using the LTRIM(RTRIM()) construct. Unfortunately, this doesn't deal with carraige returns. Even CASTing and CONVERTing to varchar and then using LTRIM(RTRIM()) doesn't work.

Does anyone know how I can elegantly get around this problem other than my best guess below:

Best guess pseudo code:
IF count of field is greater than 1 THEN probably a full sentence so ignore ELSE SUBSTRING first character and if CHAR(10, etc) then treat as NULL.

Here's some code that reconstructs the problem:
select datalength(char(13)) CarriageReturnVisible
, datalength(ltrim(rtrim(cast(char(13) as varchar)))) [This Don't Work]


Cheers - Andy

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go

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