reading a parameter in store proc

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Hi
i have a store proc in sql server 2008

SQL

ALTER PROCEDURE dbo.Number	
AS
	select count(*) as total from site
	RETURN

it works fine, but when i want to read the total amount in SqlDataReader in bump into an errro,here it is my code in c#:

C#

SqlCommand storedProcCommand = new SqlCommand("Number", con);
storedProcCommand.CommandType = CommandType.StoredProcedure;
con.Open();
SqlDataReader dr = storedProcCommand.ExecuteReader();
if (dr.HasRows)
    {
      object[] values = new object[dr.FieldCount];
      Int32 ob = dr.GetInt32(0);
     ob = dr.GetInt32(0);
               }

and the error says:

Invalid attempt to read when no data is present.

what's wrong with my code?and can you give me some links so i can't learn more about sql programming?like learning how to call a store proc. in another store proc,and conditions and loops in sql etc.

Thanks

Posted 19-Sep-12 2:20am

Arash Khangaldi

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Comments

[no name] 19-Sep-12 8:25am

You need to call Read() on your reader before you can read anything.

Arash Khangaldi 19-Sep-12 8:30am

tanx

[no name] 19-Sep-12 8:28am

Waht's the point of "RETURN" at the end of your procedure?

Arash Khangaldi 19-Sep-12 8:31am

that's pre-added sql coded by sql server,that's why i asked for some links to understand and read more about sql and programming in sql,i'm new to sql

2 solutions

Solution 2

C#

if (dr.HasRows)
{
    while (dr.Read())
    {
        object[] values = new object[dr.FieldCount];
       Int32 ob = dr.GetInt32(0);
      ob = dr.GetInt32(0);
    }
}
dr.Close();

Try in this way

Posted 19-Sep-12 2:27am

Arav Pradeep Gupta

Updated 19-Sep-12 2:34am

v3

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WebMaster · Accepted Answer · 2012-09-19T02:26:00

Solution 1

change your code by tis way:

C#

if (dr.Read())
{
    object[] values = new object[dr.FieldCount];
    Int32 ob = dr.GetInt32(0);
    ob = dr.GetInt32(0)
}

Posted 19-Sep-12 2:26am

WebMaster

Comments

Arash Khangaldi 19-Sep-12 8:30am

ممنون عزیز

[no name] 19-Sep-12 8:32am

You're welcome!