retrieving the value in a column using a dataTable - Database Discussion Boards

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Re: first 10 rows

Ennis Ray Lynch, Jr.1-Aug-06 4:49

Ennis Ray Lynch, Jr.

1-Aug-06 4:49

SELECT * FROM table where ROWNUM < 10 ORACLE
SELECT TOP 10 * FROM table SQL Server
SELECT * FROM table LIMIT 10 MySql Also
SELECT * FROM table LIMIT 10 OFFSET 50

A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."

-- Stephen Crane

is this the right forum

weelze31-Jul-06 16:44

weelze

31-Jul-06 16:44

i am trying to write a script. i need to copy the contents of my clipboard into a text file. then i need to save the text file as a htm file extention with a different name then i need to close both of the files. basically what i am doing is saving web page code in a filemaker pro data base. and i want to take the contents of a field that contains my code. and save itr as a htm file. is there any scripting language that will allow me to do this.

thanks in advance for any responses

Re: is this the right forum

Frank Kerrigan31-Jul-06 22:21

Frank Kerrigan

31-Jul-06 22:21

Try APS.NET, Windows, C# or VB

Look where you want to go not where you don't want to crash.

Bikers Bible

Re: is this the right forum

S Douglas1-Aug-06 21:50

S Douglas

1-Aug-06 21:50

weelze wrote:
is this the right forum

Not really

weelze wrote:
basically what i am doing is saving web page code in a filemaker pro data base. and i want to take the contents of a field that contains my code. and save itr as a htm file.

Sure, shouldn't be terible difficult with a scripting language such as VBS (Visual basic Scripting), the MSDN has a bunch of examples.
Visual Basic Scripting[^]

I'd love to help, but unfortunatley I have prior commitments monitoring the length of my grass. :Andrew Bleakley:

I cannot change BindingContext.Position`s value

txwd31-Jul-06 16:40

txwd

31-Jul-06 16:40

I want to add a new row to my datatable,then set this row is Currentrow
in BindingContext, so i change the BindingContext.Position for moving to the new row.

I have two forms,I can change the "BindingContext[mydatatable].Position" in one form ,but this cannot be implemented in another form .Who can tell me why?The code is:
DataRow dr = GdtKeyPoint.NewRow();
GdtKeyPoint.Rows.Add(dr);
this.BindingContext[GdtKeyPoint].Position = GdtKeyPoint.Rows.Count;
//or this.BindingContext[GdtKeyPoint].Position = GdtKeyPoint.Rows.Count-1;
//also can`t be implement. no error was raising!!

Re: I cannot change BindingContext.Position`s value [modified]

Edbert P31-Jul-06 20:27

Edbert P

31-Jul-06 20:27

Are you using .Net 2.0? If yes, then try using BindingSource instead.
If not, then try working with the CurrencyManager instead of the BindingContext.
[edit]You can get the CurrencyManager from the BindingContext, and that's supposed to be the object that you edit instead./edit]

"A democracy is nothing more than mob rule, where fifty-one percent of the people may take away the rights of the other forty-nine." - Thomas Jefferson

"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." - Benjamin Franklin

Edbert
Sydney, Australia

Last modified: Tuesday, 1 August 2006 01:32:54 --

Re: I cannot change BindingContext.Position`s value

txwd31-Jul-06 23:11

txwd

31-Jul-06 23:11

To Edbert:
Thank you very much,I am using .net 2.0. but I just a freshman for it. I will try the method your words concerned .My English is poor, but I hope you'll understand what I said.

retrieving the value in a column using a dataTable

Glen Harvy31-Jul-06 16:00

Glen Harvy

31-Jul-06 16:00

Hi,
using C#;
using VS2005;

I have a dataset that contains several datatables. What I wish to do is search each row in one of the tables and read/copy the value of a column into a variable. I will then manipulate the variable as needed. Specifically, the dataTable is "MembershipDetails" and the column is "MembershipNumber". The dataset is called "myclubDataSet".

The purpose of all this is to determine the next sequential membership number.

If someone could be so good enough to write the code for me I would very much appreciate it because I can't find a simple straightforward example anywhere on the net to learn from.

I know how to do a sql command to do this but I don't want to do it on the database. I wish to achieve it using the dataset.

Thanks in advance.

Glen Harvy

Re: retrieving the value in a column using a dataTable

Frank Kerrigan31-Jul-06 22:27

Frank Kerrigan

31-Jul-06 22:27

This seems a very hard way to do a simple task.

Run following sql code to get a last membership number

<br />
select top 1 MembershipNumber<br />
from myclubDataSet<br />
ORDER BY MembershipNumber DESC<br />

This will no however stop two user from trying to create the same membership number after getting the same last number from the database.

What you really want to do is return the membership number after creation

Make 'MembershipNumber' and identity column on your database and use similar codeas below,

<br />
insert membername, memberdetails<br />
VALUES ('Joe Bloggs', '15 Anyplace Road')<br />
<br />
SELECT @@Indentity<br />
<br />

The select @@Indentity will get the newly created memebership number. Try it in SQL before you try and code it.

Look where you want to go not where you don't want to crash.

Bikers Bible

Re: retrieving the value in a column using a dataTable

Glen Harvy1-Aug-06 0:39

Glen Harvy

1-Aug-06 0:39

Thanks for your asistance - much appreciated.

Frank Kerrigan wrote:
This seems a very hard way to do a simple task.

That seems to be the way I do everything nowadays Mad | :mad:

.

I have some database/SQL experience with designing websites that use databases and understand your suggestions pretty well BUT I need to achieve my aim without going back to the database. I really want to learn how to retrieve the value of a column in each row or specific row.

With a bit of help from elsewhere I've got as far as:-

DataTable table = myclubDataSet.Tables["MemberDetails"];
DataRow[] foundRows;
foundRows = table.Select("MembershipNumber > 1 ");

for (int i = 0; i < foundRows.Length; i++)
{
int num = System.Convert.ToInt32(foundRows["MembershipNumber"]);
MessageBox.Show("Membership number is: " + num);
}

But this leads to a build error message:

Error Cannot implicitly convert type 'string' to 'int'

with the culprit being MembershipNumber even though that column is defined as an Int32 in the datatable.

I hope you can see what I'm trying to learn to do and can just help me over this hurdle Smile | :)

Thanks,

Glen Harvy

Re: retrieving the value in a column using a dataTable

Frank Kerrigan2-Aug-06 10:09

Frank Kerrigan

2-Aug-06 10:09

OK read my article on ADO datagrids for getting stuff from to a db, you should be able to alter the code to meet your needs

http://www.codeproject.com/aspnet/EasyADODgrids.asp[^]

Look where you want to go not where you don't want to crash.

Bikers Bible

Re: retrieving the value in a column using a dataTable

Glen Harvy2-Aug-06 15:29

Glen Harvy

2-Aug-06 15:29

After much, much searching and a bit of a hint here, a bit of false leading there and a lot of building I ended up achieving what I wanted as follows:

private void defaults()
{
this.memberDetailsTableAdapter.Fill(this.myclubDataSet.MemberDetails);

int totalRows = myclubDataSet.MemberDetails.Rows.Count;
short maxMemNum = 0;
short nextMemNum = 0;
for (int i = 0; i < totalRows; i++)
{
short MemNum = (short)myclubDataSet.Tables["MemberDetails"].Rows[i]["MembershipNumber"];
if (MemNum >= maxMemNum)
{
maxMemNum = MemNum;
nextMemNum = ++maxMemNum;
MemNum = nextMemNum;
}
}
this.editMembershipNumber.Text = nextMemNum.ToString();
}

Poke tongue | ;-P

Glen Harvy

What wrong it this script??

Skanless31-Jul-06 9:17

Skanless

31-Jul-06 9:17

Use Master

GO

RESTORE DATABASE Central Coast from disk = 'C:\centralcoast_db_200602020948.BAK'
with MOVE 'centralcoast_Data'
TO 'd:Z_centralcoast_Data.MDF',
MOVE 'centralcoast_Log' TO 'd:\Z_centralcoast_Log.LDF',

stats = 1

STOPAT = 'Feb 02, 2006 06:00 AM'

I'm trying to restore this Database up to a specific date and time but form some reason I geting an error saying "error missinf syntax after 'FROM' "

Greg

Coding makes the world go round!!!

Re: What wrong it this script??

Chris Meech31-Jul-06 9:46

Chris Meech

31-Jul-06 9:46

Just guessing that the space character between Central and Coast is causing the problem. Try

RESTORE DATABASE 'Central Coast' from disk = 'C:\centralcoast_db_200602020948.BAK'

or is the database called 'CentralCoast'?

Chris Meech

I am Canadian. [heard in a local bar]

Re: What wrong it this script??

Skanless31-Jul-06 10:07

Skanless

31-Jul-06 10:07

Yeah, the DB's name is CentralCoast.

Greg

Coding makes the world go round!!!

Re: What wrong it this script?? [modified]

Eric Dahlvang31-Jul-06 9:52

Eric Dahlvang

31-Jul-06 9:52

Try placing a comma after stats=1.

RESTORE DATABASE 'Central Coast' from disk = 'C:\centralcoast_db_200602020948.BAK'
with MOVE 'centralcoast_Data'
TO 'd:Z_centralcoast_Data.MDF',
MOVE 'centralcoast_Log' TO 'd:\Z_centralcoast_Log.LDF',
stats = 1,
STOPAT = 'Feb 02, 2006 06:00 AM'

[edit] and the space in dbname, like Chris said [/edit]
-- modified at 15:53 Monday 31st July, 2006

--EricDV Sig---------
Some problems are so complex that you have to be highly intelligent and well informed just to be undecided about them.
- Laurence J. Peters

Insert Question

PyroManiak31-Jul-06 8:47

PyroManiak

31-Jul-06 8:47

How do I Insert a copy of a record when I want to change ONLY one field..

INSERT INTO tb
SELECT field1, field2, field3, field4, field5
FROM tb AS tb_1
WHERE (field1 = @Value)

None of the selected items are the primary key, and this insert works fine for a perfect clone, but I need to be able to modify field1 with a textbox the user can type in.

I know there is VALUE keyword.. but I can't seem to get it to work for just field1.

Re: Insert Question

Ennis Ray Lynch, Jr.31-Jul-06 9:27

Ennis Ray Lynch, Jr.

31-Jul-06 9:27

INSERT INTO tb
SELECT @someValue, field2, field3, field4, field5
FROM tb AS tb_1
WHERE primaryKey = @primaryKey

A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."

-- Stephen Crane

Re: Insert Question

PyroManiak31-Jul-06 13:22

PyroManiak

31-Jul-06 13:22

Thank you.

ADO.NET OUTPUT Parameter

Carlos Paiva31-Jul-06 3:11

Carlos Paiva

31-Jul-06 3:11

Hi all

I'm moving an VB6 app to .NET and i'm faced with the following problem:

Having the following stored procedure in SQL SERVER 2000, that returns a dataset (Read only) AND has an OUTPUT parameter at same time, which of the command methods should i use, since it seems that ExecuteReader (Thats seems to be the only that returns a rowset) doesnt update the OUTPUT parameter.
Im I missing something?, Is there Any work Around?

'==============================================================================
ALTER PROCEDURE spGetResourceText (@frmName varchar(20),@MaxIndex int OUTPUT)
AS
SET NOCOUNT ON

SELECT @MaxIndex = Max(Id) FROM tblResourceText WHERE frmName = @frmName
SELECT * FROM tblResourceText WHERE frmName = @frmName

RETURN
'==============================================================================

Thanks in advance for your time!
Carlos Paiva

Re: ADO.NET OUTPUT Parameter

ToddHileHoffer31-Jul-06 7:35

ToddHileHoffer

31-Jul-06 7:35

I'm not sure why the output parameter has not been updated but there are many workarounds.

1. Use two stored procs and call them each.
2. Change select statements to
SELECT @MaxIndex = Max(Id) FROM tblResourceText WHERE frmName = @frmName
SELECT *, @MaxIndex as MaxIndex FROM tblResourceText WHERE frmName = @frmName

then the MaxIndex is returned in your dataset or datareader.

I could go on but I think you'll figure it out.

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Re: ADO.NET OUTPUT Parameter

Carlos Paiva1-Aug-06 4:29

Carlos Paiva

1-Aug-06 4:29

Hi ToddHileHoffer

Thanks for your answer.
I've already go for the work around, and i fix it, but stiil would like to know why doesnt the parameter get updated! For me it doesn't make any sense, since in several stored procedures, we need to return several variables and simultaniously a dataset. It dosn't make any sense to make sevaral calls to the server, when we can do it in a single shot! The idea of appending them to the returned dataset, is a good idea!
The biggest problem, is that i have several applications, that all use the same base system database, a few designed in VB6 and others that gonna be ported to .NET, and i'm trying to make transparent to the server application (view the same in VB6 and VB.NET).
This implies no changes to the stored procedures! So by now, i'm trying another aproach to retrieve some of the parameters, with a new sp that runs in the begining of Client Start.

Thanks for your time,
Carlos

complex SQL statement?

giddy_guitarist30-Jul-06 23:06

giddy_guitarist

30-Jul-06 23:06

hie ,

i'm developing a booking software for a hotel...... its going to have a date control and a flexgrid.The user puts in an entry... .. theres a STAYING FROM field and a STAYING TILL field.Which according to its names store the dates between which the customer will stay. Now , say theres a customer staying from the 1st of Aug. to the 10th.... if the user clicks any day BETWEEN 1st - 10th on the date control... the flex grid should show the status of the rooms.. on THAT DAY... so ..yep this customer's entry MUST SHOW up!!

So how should i compose my SQL statement!???? D'Oh! | :doh:

also i am new to this so - wats the difference between the flexgrid and the MSHflexgrid??

Thanx!
Gideon

Re: complex SQL statement?

Colin Angus Mackay30-Jul-06 23:36

Colin Angus Mackay

30-Jul-06 23:36

giddy_guitarist wrote:
So how should i compose my SQL statement!????

More detail about your data model would be useful. You have said nothing about how room information is stored, for example. Please give details of all tables where information is to appear in the output.

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Delete Carriage Return

oskardiazdeleon30-Jul-06 21:13

oskardiazdeleon

30-Jul-06 21:13

How do I delete a carriage return () in SQL Server 2000? I am importing file from a UNIX box and for some reason I have to import it into Access to remove then re-import into SQL Server.

Is there a replace statement that will take care of this?

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