sql - How can I make a stored procedure return a "dataset" using a parameter I pass?

Question

I'm very new to Stored Procedures.

Say I have a IDCategory (int) and I pass that to a stored procedure. In normal-talk, it'd go:

Find me all the listings with an IDCategory equal to the IDCategory I'm telling you to find.

So it would find say 3 listing, and create a table with columns:

IDListing, IDCategory, Price, Seller, Image.

How could I achieve this?

Answer 1

To fill a dataset from a stored procedure you would have code like below:

SqlConnection mySqlConnection =new SqlConnection("server=(local);database=MyDatabase;Integrated Security=SSPI;");

    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
    mySqlCommand.CommandText = "IDCategory";
    mySqlCommand.CommandType = CommandType.StoredProcedure;
    mySqlCommand.Parameters.Add("@IDCategory", SqlDbType.Int).Value = 5;

    SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
    mySqlDataAdapter.SelectCommand = mySqlCommand;
    DataSet myDataSet = new DataSet();
    mySqlConnection.Open();
    mySqlDataAdapter.Fill(myDataSet);

Your connection string will be different and there are a few different ways to do this but this should get you going.... Once you get a few of these under your belt take a look at the Using Statement. It helps clean up the resources and requires a few less lines of code. This assumes a Stored Procedure name IDCategory with one Parameter called the same. It may be a little different in your setup.

Your stored procedure in this case will look something like:

CREATE PROC [dbo].[IDCategory] 
    @IDCategory int
AS 
    SELECT IDListing, IDCategory, Price, Seller, Image
         FROM whateveryourtableisnamed
         WHERE IDCategory = @IDCategory

Here's a link on Stored Procedure basics: http://www.sql-server-performance.com/articles/dba/stored_procedures_basics_p1.aspx

Here's a link on DataSets and other items with ADO.Net: http://authors.aspalliance.com/quickstart/howto/doc/adoplus/adoplusoverview.aspx