BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Updating GUID-field for ADO.NET in Delphi 2005          BorlandTalk.com Forum Index -> Delphi Databases (ADO) View previous topic :: View next topic   Author Message R. Hoek Guest Posted: Mon May 07, 2007 6:53 pm    Post subject: Updating GUID-field for ADO.NET in Delphi 2005 For some reason, when I'm trying to update a GUID field, an error occures. I've create a very simple application using a MSDE database, with two uniqueidentifier fields. I'm using TADOConnection and a TADOQuery. This is what I do.... ADOQuery1.SQL.Text := 'Select * from ADMINS order by [ID]'; ADOQuery1.Open; ADOQuery1.Edit; ADOQuery1.FieldByName('SID_LOCK').Value := Guid.NewGuid.ToString(); ADOQuery1.Post; <---- Error!!! The error is: Bij een bewerking die uit meerdere stappen bestaat, is een fout opgetreden. Controleer alle statuswaarden. Translated (as good as it could): During an operation with multiple steps, an error ocurred. Check all statusvalues. I'm running Windows XP (NL) with Delphi 2005 SP3 -- Regards, Ronald Hoek Applicationdevelopper ComponentAgro B.V. Back to top R. Hoek Guest Posted: Mon May 07, 2007 6:59 pm    Post subject: Re: Updating GUID-field for ADO.NET in Delphi 2005 A addition to this question: - Is the GUID-type field (unniqueindentifier) supported on ADO? -- Regards, Ronald Hoek Applicationdevelopper ComponentAgro B.V. Back to top R. Hoek Guest Posted: Mon May 07, 2007 7:04 pm    Post subject: Re: Updating GUID-field for ADO.NET in Delphi 2005 - This DO I'm using the same code for Delphi 6 and then it works perfectly! -- Regards, Ronald Hoek Applicationdevelopper ComponentAgro B.V. Back to top Brian Bushay TeamB Guest Posted: Tue May 08, 2007 7:17 am    Post subject: Re: Updating GUID-field for ADO.NET in Delphi 2005 Quote: A addition to this question: - Is the GUID-type field (unniqueindentifier) supported on ADO? Yes. Type AdGuid -- Brian Bushay (TeamB) Bbushay (AT) NMPLS (DOT) com Back to top R. Hoek Guest Posted: Tue May 08, 2007 2:19 pm    Post subject: Re: Updating GUID-field for ADO.NET in Delphi 2005 - found t I Found the error to be an problem with using the Guid.ToString() method of the .NET framework in conjuction with the way the TGUIDField is used by Borland. In the Unit "DB" at line 7387 (implementation of the TGuidField.SetAsGuid) procedure TGuidField.SetAsGuid(const Value: TGUID); begin SetAsString(GuidToString(Value)); end; This uses the function "GUIDToString" in Unit "SysUtils" at line 6666 function GUIDToString(const GUID: Borland.Delphi.System.TGUID): string; begin Result := GUID.ToString; end; As you can see, this routine uses the GUID.ToString method. The problem wit this, is that the function returns the GUID without the {} around it, thus resuting in aan error when posting this data to the ADORecordSet.... This will propebly affect all TDataset descendents which use the TGuidField and setting it using "AsGUID".... When u use this kind of field and use the AsString property by setting the GUId with the correct syntax AsString := '{' + Guid.ToString() + '}' No problem will occure.... -- Regards, Ronald Hoek Applicationdevelopper ComponentAgro B.V. "R. Hoek" <*nospam*hoek (AT) componentagro (DOT) nl*nospam*> schreef in bericht news:463f2f43$1 (AT) newsgroups (DOT) borland.com... Quote: For some reason, when I'm trying to update a GUID field, an error occures. I've create a very simple application using a MSDE database, with two uniqueidentifier fields. I'm using TADOConnection and a TADOQuery. This is what I do.... ADOQuery1.SQL.Text := 'Select * from ADMINS order by [ID]'; ADOQuery1.Open; ADOQuery1.Edit; ADOQuery1.FieldByName('SID_LOCK').Value := Guid.NewGuid.ToString(); ADOQuery1.Post; <---- Error!!! The error is: Bij een bewerking die uit meerdere stappen bestaat, is een fout opgetreden. Controleer alle statuswaarden. Translated (as good as it could): During an operation with multiple steps, an error ocurred. Check all statusvalues. I'm running Windows XP (NL) with Delphi 2005 SP3 -- Regards, Ronald Hoek Applicationdevelopper ComponentAgro B.V. 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