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how do i call the returned value from the stored procedure?
i got error message saying that procedure "login" requires a @username when i tried the following:
Dim username As String = txtUserName.Text
Dim password As String = txtPassword.Text
Dim ocm As SqlClient.SqlCommand
ocm = New SqlClient.SqlCommand("Login", SqlConnection1)
ocm.CommandType = CommandType.StoredProcedure
Dim pusername As SqlClient.SqlParameter
pusername = New SqlClient.SqlParameter("@Username", SqlDbType.VarChar, 50)
pusername.Value = username
ocm.Parameters.Contains(pusername)
Dim ppassword As SqlClient.SqlParameter
ppassword = New SqlClient.SqlParameter("@Password", SqlDbType.VarChar, 50)
ppassword.Value = password
ocm.Parameters.Contains(ppassword)
SqlConnection1.Open()
Dim dr As SqlDataReader = ocm.ExecuteReader()
If dr.GetValue(-1) Then
errormsg.Text = "invalid userid and/or password."
Else
Dim pid As SqlClient.SqlParameter
pid = New SqlClient.SqlParameter("@customerid", SqlDbType.VarChar, 50)
ocm.Parameters.Add(pid)
Response.Redirect("home.aspx")
End If
SqlConnection1.Close()
or is there a better way to do this?
Laine
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Laine
I would have expected something like the following (note that I don't normally work with VB.NET, and I haven't tested the following):
ocm = New SqlClient.SqlCommand("Login", SqlConnection1)
ocm.CommandType = CommandType.StoredProcedure
<br> <br>
'Input parameters @Username and @Password ...
pusername = ocm.Parameters.Add("@Username", SqlDbType.VarChar, 50)
pusername.Value = username
ppassword = ocm.Parameters.Add("@Password", SqlDbType.VarChar, 50)
ppassword.Value = password
<br> <br>
'Output parameter @CustomerID ...
pcustomerid = ocm.Parameters.Add("@customerid", SqlDbType.VarChar, 50)
pcustomerid.Direction = SQLClient.ParameterDirection.Output
<br> <br>
'Return value ...
preturnvalue = ocm.Parameters.Add("@ReturnValue", SqlDbType.Int)
preturnvalue.Direction = SQLClient.ParameterDirection.ReturnValue
<br> <br>
'Execute command (note that no data is returned)...
ocn.ExecuteNoQuery()
<br> <br>
'Check the outcome (I used ToString to avoid explicit casting) ...
if preturnvalue.Value.ToString() = "1" then
customerid = pcustomerid.Value.ToString()
end if
I was unsure that all of your parameters should be varchar(50). I would have expected customerid to be an integer.
I hope this helps.
Andy Harman
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pcustomerid = ocm.Parameters.Add("@customerid", SqlDbType.VarChar, 50)
oopss.. that was an error(due to cut & paste).. i forgot to change that.. it's suppose to be Int.
ok Andy.. thanks a lot for ur help. i'll try this out asap..
Laine
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Hi,
I have a SQL SERVER 2000,
I have a Database ACCESS 97 ( db.mdb)
I use Entreprise manager for link the DB ACCESS 97 by linked servers to SQL2000.
The only choice for PROVIDER NAME I have Microsoft Jet 4.0 OLE DB but for ACCESS 97 it is not good.
I don't have the possibility for chabge the DATABASE ACCESS 97 with other.
If anyone can help me or suggest a solution. Please contact me.
Best Regards
youssef
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Does the OLE DB Driver for ODBC drivers work?
Dave
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Hi, all:
I have WinForm app to edit MS Access DB. On the dataset I have serveral Master-detail tables( the Relation is edited in the schema editorat design time, not runtime). The Master table is databind to a datagrid and detail tables are databind to either datagrids or a set of textbox controls. When I first load ( fill) the data, everything works fine and textboxes display the correct data. When I change selections in the master table, the textboxes change accordingly. Now, when I REOPEN the MDB file, the the tables which databind to the datagrid works as before, but the table that bind to a set of Textboxes do not have any data displayed. I can NOT figure it out what is wrong. I appreciate any help/insight you have. Thanks very much. The following is the code I used to bind the data after I open and fill the dataset: dsMain1
***************
textBox1.DataBindings.Clear();
textBox1.DataBindings.Add(new Binding("Text", dsMain1, "MyMaster.MasterToDetail.name"));
textBox2.DataBindings.Clear();
textBox2.DataBindings.Add(new Binding("Text", dsMain1, "MyMaster.MasterToDetail.Title"));
textBox3.DataBindings.Clear();
textBox3.DataBindings.Add(new Binding("Text", dsMain1, "MyMaster.MasterToDetail.Company"));
***************
Dion
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Hello guys,
I have a problem with my application.
I'd like to execute the store procedure with a datetime parameter.
It'll seem easy do it but in my case I have to convert a DBTIMESTAMP type from VC++ application.
So I need to know how pass the SQL datetime parameter to my SP having the DBTIMESTAMP value in my Server application.
Can anyone help me???
Thanks in advance for your support!!!;)
Andrea
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Can only tell you how i do it with ODBC. There are Escape-Sequences, i.e. '{d 26-03-02}', the driver will convert it to a date your DB can understand.
dirk
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Hi Dirk,
thanks in advance for your support
Fortunatly I resolved my problem!!
Simply instead of pass the datetime value to my SP,I pass the TCHAR string and inside the SP use the CONVERT function.
In this manner in the C++ side (server) I can pass simply a BSTR parameter.
Bye
Andrea
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Hi all
I m trying to learn VC++ database prog. in this regard i need help if
someone can create a small sample app as follows:
> IDE = VC++ 6
> Using ADO DSN less connection (Provider='' user='' password='' data source='')
> db contains two tables (table_a, table_b)
>each table contain 3 fields of datatypes Numeric, Char, Date
>data must populate in Edit Boxes via SQL statement which stored behind a button
>other buttons Add Update Delete (Add/Update will not work automatically as in Access or VB)
>data validation of table_a thru table_b during Add/Editing
I will be very grateful. This will help alot to understand VC database programing.
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Hello,
Is their a Critical section function on store procedure? Or what is the counter part of CriticalSection of C in store procedure script?
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What are you trying to do?
You can lock tables, etc... yourself if you want, but that could slow your whole architecture down.
Cheers,
Simon
"I ask candidates to create an object model of a chicken.", Bruce Eckel on interviewing programmers.
animation mechanics in SVG (latest pic 1) (latest pic 2)
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Yeah, you should by default allow SQL to handle locking. If you concern is that all processes should complete or fail look at
BEGIN TRANSACTION
ROLLBACK TRANSACTION
COMMIT TRANSACTION
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Hi,
I need to migrate an old database under Visual Fox Pro 3.0 to SQL Server 2000. I was looking around to got the connectionString for the olddbConnection object but I can't find anything.
I've tried to use the this one :
("Provider=MSDASQL; Persist Security Info=False;Data Source=Test")
but I got the following error message :
The .Net Data OLE DB Provider(System.Data.OleDb) does not support the MSDASQL Provider, Microsoft OLE DB Provider for ODBC Drivers.
Does anyone know how to read data from Fox Pro ?
Thanx
Sybux
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Sure it is possible.
<br />
Create Table #tempTable<br />
(ID INT IDENTITY,<br />
col1 type,<br />
col2 type,<br />
...)<br />
<br />
Insert Into #tempTable (col1, col2, ...)<br />
Select col1, col2, ...<br />
From .....<br />
<br />
<br />
Select * from #tempTable<br />
This will add an incremented ID to the temp table, you can then select from.
Hope this helps.
Jeremy Oldham
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This solution is for Oracle, I don't know if and how you can use it in other systems:
SELECT rownum, col1, col2, col3 FROM table;
--
karl
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Hi,
I have created a DLL which access the DAO objects (specially MSAccess
databases). In the code I create the CDaoRecordset with the new operator,
like this:
CDaoRecordset * CDaoClass::Query(CString query)
{
CDaoRecordset * pNewRecord = new CDaoRecordset(&m_pDatabase);
pNewRecord->Open(AFX_DAO_USE_DEFAULT_TYPE, query, 0);
return pNewRecord;
}
CDaoClass::CloseRecordSet(CDaoRecordset * pRecord)
{
pRecord->Close();
delete pRecord;
}
This works just as it should if the classes are in the main application,
but I'm getting an exception when in DLL the CDaoRecordset::Open() method
is executed. The other DAO methods are working fine, so I can list the
tables, change them, create indexes, relationships, etc. But I can't
execute queries that returns data.
When debugging the application I found out that there is an exception in
DAOCORE.CPP line 4855, shown bellow:
void CDaoRecordset::BuildSelectList()
{
ASSERT_VALID(this);
ASSERT(m_nFields > 0); // This line will assert since m_nFields is 0
m_strSQL += _afxSelect2;
CDaoFieldExchange fx(CDaoFieldExchange::AddToSelectList, this);
DoFieldExchange(&fx);
}
Does anyone have any clues about it?
Thanks in advance.
Crercio O. Silva / DBTools
Crercio O. Silva / DBTools Development
http://www.dbtools.com.br
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http://www.theregister.co.uk/content/53/29419.html
Oh what a tnagled web we weave, when what we use is not free!
Use PostgreSQL (www.postgresql.org) instead!
PS. Native Windows port coming soon. In the meantime, you can run it under Cygwin.
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Makes you wonder what other MS Licenses may have holes in them. But did anyone figure out exactly what pieces they are barking about? Sounds like Olap/Analysis services but maybe even DTS as well.
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