MSDE US Date format problem - Database Discussion Boards

Colin Angus Mackay19-Dec-04 2:13

19-Dec-04 2:13

You should create a singleton class to manage your connection and have your forms request the connection from your connection management class.

hammerj wrote:
I want only to use the designer in order to create the DataAdapter. Is there some way to do it without programming?

Not that I know of. Why don't you want to program?

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Re: Single connection in several forms

j1hammer19-Dec-04 2:34

j1hammer

19-Dec-04 2:34

It is not that I don't want to program. I think it is conceptually wrong to create several objects when I only need one. Lets think of the case where I have 5 connections to the same DB, and then i want to change the connection.

I think of a scenario where I set a connection on one form, and I can use it in the designer for all forms.

Re: Single connection in several forms

Colin Angus Mackay19-Dec-04 2:38

Colin Angus Mackay

19-Dec-04 2:38

If you are thinking conceptually, then the Visual Studio designer is probably the last thing you want to use.

I think your best approach is to create a class that manages the connection and have your forms use that class. Also, it would probably be a bad idea to have one form set the connection and have the other forms use it from the first form as the connection has nothing to do with the user interface and the data management functions should really be separated out into its own conceptual layer/tier within the application.

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Re: Single connection in several forms

j1hammer19-Dec-04 23:34

j1hammer

19-Dec-04 23:34

Sadly I agree, although using the designer is one of my favorite tools in .NET.

asif m@hmood18-Dec-04 7:28

asif m@hmood

18-Dec-04 7:28

i have MSSql Desktop engine installed and i m connecting to a database from ASP.net page. i m using oleDBconnection but when i Open() connection it gives me exception "Login failed 'MATRIX\ASPNET' " where Matrix is machin name. it is working well in Windows form but only givin problem in webforms , can any body tell wats wrong with it , i m using same connection string as for windows forms.

Re: Login Failed : user ASPNET (MSDE)

Mike Dimmick18-Dec-04 8:38

Mike Dimmick

18-Dec-04 8:38

You're using Integrated Security in your connection string; that is, Windows Authentication. In this mode the database uses the credentials of the thread to authenticate the connection. Your Windows Forms application is running under your own user account, which is probably a member of the machine's Administrators group. The machine's Administrators group is granted login rights by default, and is a member of the System Administrators server role by default. In effect, your Windows user account has unlimited control over the database server.

By contrast, ASP.NET applications by default run under the ASPNET account on the local machine. This account is only a member of the Users group, which by default cannot log in to SQL Server.

You can allow the MATRIX\ASPNET user to log in using the following command (use osql to run the command):

EXEC sp_grantlogin 'MATRIX\ASPNET'

The user can now log in to the database server, but won't be able to access any databases. Grant access to the user on the database by executing:

USE database
EXEC sp_grantdbaccess 'MATRIX\ASPNET'

where database is the database that the user is granted access to.

This adds the user to the public database role. All users granted access to a database are members of this role. By default, this role has no permissions on objects created by the database owner. To grant permissions, you need to use the GRANT statement. It's recommended that you grant the public role only the permissions that are needed to perform the tasks. For example, if you wanted to allow all users to read data from the authors table, you would say

GRANT SELECT ON authors TO public

Don't get confused between the REVOKE and DENY statements. DENY allows you to filter members from a group - for example I could use the statement

DENY SELECT ON authors TO Mike

and SQL Server would then allow everyone except me to read from the authors table. REVOKE is used to undo an earlier GRANT or DENY operation.

If you want to give the ASPNET user complete control over the database - which is unadvisable - you can instead run

EXEC sp_addrolemember 'db_owner', 'MATRIX\ASPNET'

I really don't advise this, though, as a mistake in the data access layer could corrupt your database. I recommend restricting the db_owner role to development and deployment use only.

Stability. What an interesting concept. -- Chris Maunder

Libraries

abo el ror18-Dec-04 3:32

abo el ror

18-Dec-04 3:32

What libraries are needed to use the following code:
SQLDMOSvc_Running (SQL SERVER state).
When i use Set oSqlServer = New SQLServer, the (SQLSERVER) command is not recognised. So please supply a help.

MSDE US Date format problem

hugonz17-Dec-04 23:40

hugonz

17-Dec-04 23:40

Hello everyone,

I'm currently building a C# Windows Forms application, and have another machine on my network running MSDE 2000 as the database for my Windows App.

Its working fine except for one problem, MSDE keeps storing dates in US format (mm/dd/yy) instead of the format I want (dd/mm/yy). I'm passing in the dates to store as a string in the format dd/mm/yy in my SQL statements.

In the Regional Settings of the server computer, the locale is set to Enlish (New Zealand), and the short date format on the date tab is set to dd/MM/yy, yet it continues to use the wrong date format in MSDE. Do I need to somehow specify the locale that MSDE uses?

Any help would be greatly appreciated, this one is driving me nuts.

Many thanks, Hugo.

Re: MSDE US Date format problem

Mike Dimmick18-Dec-04 9:04

Mike Dimmick

18-Dec-04 9:04

You can make osql format dates and times in your locale using the -R option. My installation of osql presents dates in ISO format (yyyy-MM-dd hh:mm:ss.nnn) when this option is not specified. I'm using the Latin1_General_CI_AS collation.

You should use the datetime or smalldatetime data types when handling date information. Always use parameters[^] to submit date/time information - indeed, any data - to the database.

In your application, you should be using the locale-sensitive format strings when using DateTime.ToString. You should check the value of System.Globalization.CultureInfo.CurrentCulture.Name - it should be en-NZ. If it isn't, check that the values in the Regional and Language Options[^] Control Panel applet (Regional Options[^] in Windows 2000) are correct.

Stability. What an interesting concept. -- Chris Maunder

Re: MSDE US Date format problem

hugonz18-Dec-04 11:19

hugonz

18-Dec-04 11:19

Thanks for your reply Mike,

I've checked the value of System.Globalization.CultureInfo.CurrentCulture.Name on both my development machine (Win XP) and the server machine (Win2k server) and they are both en-NZ. I am using smalldatetime data type to store the date.

Do I use the -R option on the osql command line after installtion, or is that something I need to specify for the installtion? I believe that just makes it use the client's locale settings?

Thanks for your help.

Re: MSDE US Date format problem

Jon Hulatt19-Dec-04 22:51

Jon Hulatt

19-Dec-04 22:51

set dateformat dmy

However, If you use an intrinsic datetime data type from .Net, then you can use .Net's intrinsic culture support to format the date how you want.

Sql Server doesn't store a data in any particular culture. The date is if you like "rendered" according to various settings/defaults when it's displayed.

using System.Beer;

Re: MSDE US Date format problem

hugonz21-Dec-04 18:36

hugonz

21-Dec-04 18:36

Thanks Jon,

Yes I was thinking that it was being stored in the database in a certain culture (i.e. US format), but what your saying is that its not stored in any particular format at all? It only gets converted to a "culture" when its displayed?

What I'm doing is reading dates directly from a text file (downloaded from tha bank each day) in the format "dd/mm/yy", and inserting that straight into the MSDE database through .NET. To view that data I created a MS Access project and I am just viewing the tables directly where I am inserting the data. If I insert 12/08/04, Access shows it in the tables as 08/12/04. Is that being stored incorrectly? Or is it just being displayed in the wrong format?

Appreciate your help,

Cheers, Hugo

Installing Database

abo el ror17-Dec-04 14:29

abo el ror

17-Dec-04 14:29

How can I install a Database on the SQL SERVER 2000 programatically using VB.Net code?

With Regards
Rawad Eid

Re: Installing Database

Colin Angus Mackay17-Dec-04 15:28

Colin Angus Mackay

17-Dec-04 15:28

abo el ror wrote:
How can I install a Database on the SQL SERVER 2000 programatically using VB.Net code?

Do you mean how to add a database to the server, or actually install the server itself?

If you want to attach a database to the server using VB.NET then you can just create SqlCommand objects and use ExecuteNonQuery to run the appropriate SQL commands at the SQL Server. sp_attach_db[^] is probably the Stored Procedure you need. Remember that your SqlConnection to the database must use a user that is the sysadmin or dbcreator role.

Does this help?

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Re: Installing Database

Javier Lozano17-Dec-04 17:58

Javier Lozano

17-Dec-04 17:58

One thing you could do is use the SQLDMO library to encapsulate the objects in the server as types in your application.

~javier lozano
(blog)

More on CRecordset Instances

Chris Meech17-Dec-04 8:22

Chris Meech

17-Dec-04 8:22

Last week I asked for some help here[^] and didn't get a reply. I was at a client site most of the week and today I got back to some more testing and now know more and hopefully am asking the right question. If the SQL query assigned to a recordset instance refers to a table, then everything works, but if the SQL query assigned to the recordset is a view, then it doesn't work. Most baffling and I can't seem to dig up an answer in the help on this.

This works fine

CString  strSQL("SELECT LANG_CODE, LANG_NAME FROM LANGUAGES_TABLE");
CRecordset  rs(&db);  //  db is already opened and functional.
if ( rs.Open(AFX_DB_USE_DEFAULT_TYPE, strSQL) != TRUE )
{
  return false;
}
while ( !rs.EOF() )
{
  CString  strLangCode;
  CString  strLangName;
  rs.GetFieldValue("LANG_CODE", strLangCode);
  rs.GetFieldValue("LANG_NAME", strLangName);
  rs.MoveNext();
}

But when I change the SQL string to what I posted in my original post where the FROM clause refers to a view, then I get an exception thrown in the GetFieldValue call. The error is something about the Cursor State being illegal for fetching data. If anyone can help, I'd really be grateful. Thanks.

Chris Meech

I am Canadian. [heard in a local bar]

Gently arching his fishing rod back he moves the tip forward in a gentle arch releasing the line.... kersplunk [Doug Goulden]

Nice sig! [Tim Deveaux on Matt Newman's sig with a quote from me]

Re: More on CRecordset Instances

Mike Dimmick17-Dec-04 12:33

Mike Dimmick

17-Dec-04 12:33

rs.GetFieldValue turns (eventually) into a call to SQLGetData. The documentation for this function says that if you get state = 24000, one of the following is true (this is simply copied from the documentation):

(DM) The function was called without first calling SQLFetch or SQLFetchScroll to position the cursor on the row of data required.
(DM) The StatementHandle was in an executed state, but no result set was associated with the StatementHandle.
A cursor was open on the StatementHandle and SQLFetch or SQLFetchScroll had been called, but the cursor was positioned before the start of the result set or after the end of the result set.

It can't be the first, because CRecordset::Open calls MoveNext before returning. So either the database didn't return a resultset (which should have been caught by Open) or no rows were returned - but this should have led to IsEOF returning FALSE.

Why this should work for a table but not a view I don't know. What ODBC driver are you using? For which database software?

Stability. What an interesting concept. -- Chris Maunder

Re: More on CRecordset Instances

Chris Meech21-Dec-04 2:00

Chris Meech

21-Dec-04 2:00

Thanks for the comments, Mike. I'm back in my office again today and will be doing some more experimenting to see if I can figure it out. I think it will likely be more than just the fact that I'm querying a view. The particular view happens to contain about 4 function calls in it and that is likely playing a role in the failure. As far as the back end goes it's an Oracle 9i database and I've tried this with both the Oracle ODBC driver and the Microsoft ODBC driver with Oracle 9i client installed. I can run the SQL fine from the command line in SQL*Plus, but it is just from within a program that I've run into this stumbling block. Hopefully, I'll know more later. Thanks again.

Chris Meech

I am Canadian. [heard in a local bar]

Gently arching his fishing rod back he moves the tip forward in a gentle arch releasing the line.... kersplunk [Doug Goulden]

Nice sig! [Tim Deveaux on Matt Newman's sig with a quote from me]

Re: More on CRecordset Instances

Chris Meech21-Dec-04 4:32

Chris Meech

21-Dec-04 4:32

I hate it when things go this way, but this morning, I trashed my schema, re-built all the tables, views, functions and procedures. Then re-loaded data into the tables and my test and development programs are now working. So as odd as the problem was, it's disappeared after re-creating everything.
Thanks again for the comments, Mike.

Chris Meech

I am Canadian. [heard in a local bar]

Gently arching his fishing rod back he moves the tip forward in a gentle arch releasing the line.... kersplunk [Doug Goulden]

Nice sig! [Tim Deveaux on Matt Newman's sig with a quote from me]

Re: Category

Brendan Vogt17-Dec-04 2:45

Brendan Vogt

17-Dec-04 2:45

I was thinking the same thing. I will try it out the weekend and let you know. THanks for the help.

Brendan