473,320 Members | 1,828 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,320 software developers and data experts.

Simple asp.net question

PCL
I am new to asp.net and am having a hard time with what i would usually do
with a recordset. I have a simple query that returns a record - how can i
get that record value into a variable after i execute the query:

select Max(DailyPOnumber) + 1 as MaxPO from tblPurchaseOrders

i used to be able to do something similar to
MaxNo=rs("MaxNo")

any help would be appreciated
Nov 22 '05 #1
4 1333
try this :

on the datareader
do while reader.read
maxno = reader("maxno")
loop

--

"PCL" wrote:
I am new to asp.net and am having a hard time with what i would usually do
with a recordset. I have a simple query that returns a record - how can i
get that record value into a variable after i execute the query:

select Max(DailyPOnumber) + 1 as MaxPO from tblPurchaseOrders

i used to be able to do something similar to
MaxNo=rs("MaxNo")

any help would be appreciated

Nov 22 '05 #2
PCL
Thank You for your help - this got me a little further.

I Dimensioned maxno as an objext

i tried making it an integer and it errored out. The problem is now that it
is an object i am not able to work with the value - i tried assigning it to a
text box and i got the following error:

Exception Details: System.InvalidCastException: Cast from type
'SqlDataReader' to type 'String' is not valid.

Source Error:
Line 238: End If
Line 239: Label11.Text = Sql
Line 240: lblextra.Text = MaxPO <-----Problem line
Line 241: End Sub
Line 242:End Class

"[Alan Flores]" wrote:
try this :

on the datareader
do while reader.read
maxno = reader("maxno")
loop

--

"PCL" wrote:
I am new to asp.net and am having a hard time with what i would usually do
with a recordset. I have a simple query that returns a record - how can i
get that record value into a variable after i execute the query:

select Max(DailyPOnumber) + 1 as MaxPO from tblPurchaseOrders

i used to be able to do something similar to
MaxNo=rs("MaxNo")

any help would be appreciated

Nov 22 '05 #3
try MaxPo.ToString();
or convert.ToString(MaxPO);

--

Regards,

Hermit Dave (D'way)
http://hdave.blogspot.com

(I hear what you're saying.. but lets try it my way first)

"PCL" <PC*@discussions.microsoft.com> wrote in message
news:55**********************************@microsof t.com...
Thank You for your help - this got me a little further.

I Dimensioned maxno as an objext

i tried making it an integer and it errored out. The problem is now that it is an object i am not able to work with the value - i tried assigning it to a text box and i got the following error:

Exception Details: System.InvalidCastException: Cast from type
'SqlDataReader' to type 'String' is not valid.

Source Error:
Line 238: End If
Line 239: Label11.Text = Sql
Line 240: lblextra.Text = MaxPO <-----Problem line
Line 241: End Sub
Line 242:End Class

"[Alan Flores]" wrote:
try this :

on the datareader
do while reader.read
maxno = reader("maxno")
loop

--

"PCL" wrote:
I am new to asp.net and am having a hard time with what i would usually do with a recordset. I have a simple query that returns a record - how can i get that record value into a variable after i execute the query:

select Max(DailyPOnumber) + 1 as MaxPO from tblPurchaseOrders

i used to be able to do something similar to
MaxNo=rs("MaxNo")

any help would be appreciated

Nov 22 '05 #4
PCL
My ongoing saga to return a value from a stored procedure - i switched from
using data reader to using a dataadapter. I now am able to assign a textbox
the number of records returned by the Stored procedure with:

txtExtra.Text = DS.Tables("PO").Rows.Count
it returns 1 which is what i expect - i want to actually store the value of
the stored procedure returns (it is a simple SQL - Select Max(po) from PODB)

i tried the following line and it returns nothing:
txtExtra.Text = DS.Tables("PO").Rows(0).Item(0).ToString()

i tried
txtExtra.Text = DS.Tables("PO").Rows(1).Item(1).ToString()
and i get an error which tells me there is now row 1.

Any help would be greatly appreciated - it is frustrating - i feel i am
very close yet so far away....

"Hermit Dave" wrote:
try MaxPo.ToString();
or convert.ToString(MaxPO);

--

Regards,

Hermit Dave (D'way)
http://hdave.blogspot.com

(I hear what you're saying.. but lets try it my way first)

"PCL" <PC*@discussions.microsoft.com> wrote in message
news:55**********************************@microsof t.com...
Thank You for your help - this got me a little further.

I Dimensioned maxno as an objext

i tried making it an integer and it errored out. The problem is now that

it
is an object i am not able to work with the value - i tried assigning it

to a
text box and i got the following error:

Exception Details: System.InvalidCastException: Cast from type
'SqlDataReader' to type 'String' is not valid.

Source Error:
Line 238: End If
Line 239: Label11.Text = Sql
Line 240: lblextra.Text = MaxPO <-----Problem line
Line 241: End Sub
Line 242:End Class

"[Alan Flores]" wrote:
try this :

on the datareader
do while reader.read
maxno = reader("maxno")
loop

--

"PCL" wrote:

> I am new to asp.net and am having a hard time with what i would usually do > with a recordset. I have a simple query that returns a record - how can i > get that record value into a variable after i execute the query:
>
> select Max(DailyPOnumber) + 1 as MaxPO from tblPurchaseOrders
>
> i used to be able to do something similar to
> MaxNo=rs("MaxNo")
>
> any help would be appreciated


Nov 22 '05 #5

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

3
by: Patchwork | last post by:
Hi Everyone, Please take a look at the following (simple and fun) program: //////////////////////////////////////////////////////////////////////////// ///////////// // Monster Munch, example...
1
by: Proteus | last post by:
Any help appreciated on a small perl project I need to write for educator/teaching purposes. I have not programmed perl for some time, need to get up to speed, maybe some kind souls hrere will help...
2
by: Raskolnikow | last post by:
Hi! I have a very simple problem with itoa() or the localtime(...). Sorry, if it is too simple, I don't have a proper example. Please have a look at the comments. struct tm *systime; time_t...
3
by: Peter | last post by:
Hello Thanks for reviewing my question. I would like to know how can I programmatically select a node Thanks in Advanc Peter
7
by: abcd | last post by:
I am trying to set up client machine and investigatging which .net components are missing to run aspx page. I have a simple aspx page which just has "hello world" printed.... When I request...
4
by: dba_222 | last post by:
Dear Experts, Ok, I hate to ask such a seemingly dumb question, but I've already spent far too much time on this. More that I would care to admit. In Sql server, how do I simply change a...
14
by: Giancarlo Berenz | last post by:
Hi: Recently i write this code: class Simple { private: int value; public: int GiveMeARandom(void);
30
by: galiorenye | last post by:
Hi, Given this code: A** ppA = new A*; A *pA = NULL; for(int i = 0; i < 10; ++i) { pA = ppA; //do something with pA
10
by: Phillip Taylor | last post by:
Hi guys, I'm looking to develop a simple web service in VB.NET but I'm having some trivial issues. In Visual Studio I create a web services project and change the asmx.vb file to this: Imports...
17
by: Chris M. Thomasson | last post by:
I use the following technique in all of my C++ projects; here is the example code with error checking omitted for brevity: _________________________________________________________________ /*...
0
by: DolphinDB | last post by:
The formulas of 101 quantitative trading alphas used by WorldQuant were presented in the paper 101 Formulaic Alphas. However, some formulas are complex, leading to challenges in calculation. Take...
0
by: DolphinDB | last post by:
Tired of spending countless mintues downsampling your data? Look no further! In this article, you’ll learn how to efficiently downsample 6.48 billion high-frequency records to 61 million...
0
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, we are pleased to welcome back...
0
by: Vimpel783 | last post by:
Hello! Guys, I found this code on the Internet, but I need to modify it a little. It works well, the problem is this: Data is sent from only one cell, in this case B5, but it is necessary that data...
0
by: ArrayDB | last post by:
The error message I've encountered is; ERROR:root:Error generating model response: exception: access violation writing 0x0000000000005140, which seems to be indicative of an access violation...
1
by: PapaRatzi | last post by:
Hello, I am teaching myself MS Access forms design and Visual Basic. I've created a table to capture a list of Top 30 singles and forms to capture new entries. The final step is a form (unbound)...
0
by: Defcon1945 | last post by:
I'm trying to learn Python using Pycharm but import shutil doesn't work
0
by: Shællîpôpï 09 | last post by:
If u are using a keypad phone, how do u turn on JavaScript, to access features like WhatsApp, Facebook, Instagram....
0
by: af34tf | last post by:
Hi Guys, I have a domain whose name is BytesLimited.com, and I want to sell it. Does anyone know about platforms that allow me to list my domain in auction for free. Thank you

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.