Database

9-Jul-04 11:09

Ok, does anyone know how to retrieve Data that is generated from a Stored proc into an ADO.NET DataSet or DataTable? This used to be very easy in VB6... WTF | :WTF:

I just need a sample to lead me on the right track.

Colin Angus Mackay9-Jul-04 11:52

Colin Angus Mackay

9-Jul-04 11:52

In the stored procedure you just SELECT the relevant data. In the .NET application open a SqlConnection, create a SqlCommand to call the Stored Procedure and then call SqlCommand.ExecuteQuery() to get a DataReader to extract it*

Does this help?

*You can also uses crazy things like DataAdapters and DataSets, but y'know I don't really like them

"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

The Second EuroCPian Event will be in Brussels on the 4th of September

Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!

mikasa9-Jul-04 12:10

9-Jul-04 12:10

Sorry, I should have been more specific. Unfortunately, I do need to get this data into a DataTable or DataSet. Anyone have an idea? I know the DataAdapter uses a DataReader internally, but I don't know how I could implement this...I'm sure it would be super difficult.

rudy.net9-Jul-04 12:29

rudy.net

9-Jul-04 12:29

In the "Server Explorer" window select the connection to your database that contains the stored procedure and drag it to your form. This will create a SqlConnection object and a SqlCommand object, for example conn and cmd.
Then you can fill your DataSet with the following commands:

conn.Open();
SqlDataAdapter dataAdapter = new SqlDataAdapter(cmd);
DataSet dataset = new DataSet("datasetName");
dataAdapter.Fill(dataset);
conn.Close();

mikasa12-Jul-04 5:46

12-Jul-04 5:46

Yeah, that's not going to work either, tried that before...

The problem is that the Stored Proc is Dynamically creating Columns and Data depending on what Parameters you pass to it. Even in the Designer, I can't get it to Generate a DataSet because ADO.NET what hard-defined structures of Data when working with the Designer. However, I can run the Data Preview and it works fine, but that is because in the "Preview" mode, the data is being retrieved through a DataReader, not a DataTable.

Why can't the DataCommand Object just return a DataTable like it did in VB6!? Sigh | :sigh:

Michael Potter12-Jul-04 8:56

Michael Potter

12-Jul-04 8:56

I have no trouble executing SPs like you descibe. Here is a sample of code I just wrote today:

public static DataSet GetEventList(
     int activeState, 
     int eventId,
     int eventDateStatus,
     DateTime eventDateStart,
     DateTime eventDateEnd,
     int createDateStatus,
     DateTime createDateStart,
     DateTime createDateEnd,
     int ntdStatus,
     int eventTypeId,
     string firstName,
     string lastName)
{
     DataSet ds = null;
     SqlCommand cmd = null;
     SqlDataAdapter da = null;

     SqlConnection conn = GetConnection();
     if (conn != null)
     {
          try
          {
               cmd = new SqlCommand("EventListGet",conn);
               cmd.CommandType = CommandType.StoredProcedure;

               SqlParameter p = cmd.Parameters.Add("@ActiveState",SqlDbType.Int);
               p.Value = activeState;
                    
               p = cmd.Parameters.Add("@EventId",SqlDbType.Int);
               p.Value = eventId;

               p = cmd.Parameters.Add("@EventDateStatus",SqlDbType.Int);
               p.Value = eventDateStatus;
                    
               p = cmd.Parameters.Add("@EventDateStart",SqlDbType.DateTime);
               p.Value = eventDateStart;
                    
               p = cmd.Parameters.Add("@EventDateEnd",SqlDbType.DateTime);
               p.Value = eventDateEnd;

               p = cmd.Parameters.Add("@CreateDateStatus",SqlDbType.Int);
               p.Value = createDateStatus;
					
               p = cmd.Parameters.Add("@CreateDateStart",SqlDbType.DateTime);
               p.Value = createDateStart;
					
               p = cmd.Parameters.Add("@CreateDateEnd",SqlDbType.DateTime);
               p.Value = createDateEnd;

               p = cmd.Parameters.Add("@NTDState",SqlDbType.Int);
               p.Value = ntdStatus;

               p = cmd.Parameters.Add("@EventTypeId",SqlDbType.Int);
               p.Value = eventTypeId;

               p = cmd.Parameters.Add("@FirstName",SqlDbType.VarChar,50);
               p.Value = firstName;

               p = cmd.Parameters.Add("@LastName",SqlDbType.VarChar,50);
               p.Value = lastName;
					
               da = new SqlDataAdapter(cmd);
               ds = new DataSet();
               da.Fill(ds);
          }
          catch (Exception ex)
          {
               MessageBox.Show(ex.Message,"Load Event List Failed");
               if (ds != null)
               {
                    ds.Dispose();
                    ds = null;
               }
          }
          finally
          {
               if (da != null) da.Dispose();
               if (cmd != null) cmd.Dispose();
               if (conn != null) conn.Close();
          }
     }

     return ds;
}

mikasa12-Jul-04 10:56

12-Jul-04 10:56

Ok, this is very similar to what I tried. Do you think it matters if the Stored Proc is creating and using a Temporary Table (ex. ##TempTable)? I get errors on my Temp Table in the Designer. It doesn't make any sense because I can run this in the Query Analyzer without fail every time!

DataReader vs DataSet or other solution, please help

Michael Potter12-Jul-04 11:18

Michael Potter

12-Jul-04 11:18

Are you sure the table is being DROP'ed properly at the end of your SP?

What is the error you are getting?

ODBC question

Anonymous9-Jul-04 10:04

Anonymous

9-Jul-04 10:04

Has anyone experienced a problem with using an odbc driver where it retrieves some records without any problems, but other records are coming back as it was from a different world?

Here's the layout, I'm reading data from a dataflex table using Connx ODBC driver. When I run a simple SQL query statement on a query tool, for ex, Select * From tablename I noticed half the rows are garbage. Here's the funny part, I run a report, Cystal Reports, using their own driver to connect to the database and all the rows are fine.

Any advice would be helpful. Thanks.

metaskull9-Jul-04 5:18

metaskull

9-Jul-04 5:18

Perhaps someone can help me out here. I'm working on a Microsoft Management Console style application. I'm storing all the data to populate my Treeview, listview, menuitems, etc.. in SQL, becuase they're often gonig to change. Also, I'll be needing to make alot of calls to data, because I'm building in alot of filters for the data as well. For example, the user will often wish to filter results in the listview, new nodes will be added and deleted from the treeview... etc. On one hand, I can use a dataset, which is very useful since I'll have a local datastore that I can query againts as much as I want without having to make a new database connection. Plus I can update, insert, etc if I need to without changing my sql data and commit the changes when I'm ready. But as we all know, datasets are not cheap. On the hand I can just use datareaders and get whatever data I need when I need it from sql. Probably would employ connection pooling to ease the pain on DB connections, but still... I wanted to avoid making tons of database calls. Not sure what to do, I'm sure there are other ways to get this done, anybody have any ideas? Thank you.

Regards,
MSk

Re: DataReader vs DataSet or other solution, please help

Colin Angus Mackay9-Jul-04 10:20

Colin Angus Mackay

9-Jul-04 10:20

metaskull wrote:
I'm storing all the data... in SQL, becuase they're often going to change.

To me that one sentence says DataReader. (BTW, did you know that a DataSet uses a DataReader to populate it.)

If you use a DataSet then you are pulling the data across and storing it in one structure, you are then going to copy that data into your Tree & List Views and MenuItems.

metaskull wrote:
On one hand, I can use a dataset, which is very useful since I'll have a local datastore that I can query againts as much as I want without having to make a new database connection

You know that if you pull across too much data then the cost of querying into the DataSet becomes more expensive than the roundtrip to the database server? You need to ask yourself how much data are you bringing across.

* Disclaimer: I am not a fan of DataSets. I think they are too bulky for everyday use. IMO they are fine for putting together a scratch application that will be thrown away, but I much prefer pulling the data across through a DataReader and building my own business objects directly.

Data comparison

Shanmukeswara Rao8-Jul-04 22:20

Shanmukeswara Rao

8-Jul-04 22:20

Hi all
I have data in MS access 97 getting from two deferent sources, I need to compare these data based up on a field called “NAME” Text data type. Here there is a problem i.e. small variation in spelling in the data, what is the best approach to get a list of matched names or partly matched records in both tables.

Regards
shanmuk

Help Please in the installation of Mysql

JawedVikia808-Jul-04 20:33

JawedVikia80

8-Jul-04 20:33

Jawed Akhter
I need Help in the installation of Mysql.
Secondly from where i get free mysql

Thanks

Re: Help Please in the installation of Mysql

Mekong River10-Jul-04 6:51

Mekong River

10-Jul-04 6:51

Try to read the information from the following website: http://dev.mysql.com/doc/mysql/en/Installing.html[^] it might give you some idea on how to install MySql.

Roath Kanel
APO-CEDC
Save Children Norway-Cambodia Office

Re: Which is the free and right version of Mysq

JawedVikia8014-Jul-04 21:55

JawedVikia80

14-Jul-04 21:55

Tell me Which is the free and right version of Mysq

Re: Which is the free and right version of Mysq

Mekong River17-Jul-04 5:08

Mekong River

17-Jul-04 5:08

I learn PHP from "PHP/MySQL Programming for the absolute beginner" (ISBN: 1-931841-32-2). I think it is version 4.2.1 Confused | :confused:

and I use windows 2000. This version of PHP come from the CDROM.

But I think you should find here http://dev.mysql.com/downloads/[^] for the latest version.

Roath Kanel
APO-CEDC
Save Children Norway-Cambodia Office

mulitple choice search

Sudee8-Jul-04 17:22

Sudee

8-Jul-04 17:22

hello.

Can anyone show me how can I do multiple choice searching in a table? I am writing store procedure.

Suppose there are 3 search options on a page.

store procedure searching
@a int,
@b int,
@c int
as
select a,b,c,d,e
from grandtable
where a=@a and/or bhal bhal bhal

I am a very begineer for SQL.

thank,
Sudeep

Some dudes gotta know how to develop a prg. and some dudes just never get it at all.

DTS transforming text to datetime format

leezardd8-Jul-04 6:16

leezardd

8-Jul-04 6:16

My source is a delimited text file containing a date in the form of yyyymmdd. I would like to use the transformation in DTS to convert the data to a datetime column in my destination table. I have been using the import wizard and cannot seem to figure out how to do this. All help is greatly appreciated.

Grimolfr8-Jul-04 9:03

Grimolfr

8-Jul-04 9:03

You should be able to implicitly convert text in that format to a datetime. Just stuff the data into a datetime column, and the the SQL Server handle the conversion automatically.

Grim

(aka Toby)

MCDBA, MCSD, MCP+SB

Need a Second Life?[^]

SELECT * FROM user WHERE clue IS NOT NULL
GO

(0 row(s) affected)

leezardd8-Jul-04 9:22

leezardd

8-Jul-04 9:22

When I try to let SQL server handle the conversion I receive this error:
ActiveX Scripting Transform "AxScriptXform' encountered an invalid data value for 'EmpAnnvDate' destination column.

Grimolfr9-Jul-04 2:17

Grimolfr

9-Jul-04 2:17

Have you verified that all of your records contain valid dates in that format?

Grim

(aka Toby)

MCDBA, MCSD, MCP+SB

Need a Second Life?[^]

SELECT * FROM user WHERE clue IS NOT NULL
GO

(0 row(s) affected)