How to select output scalar values in sql server? - sql-server

Question

Hi I'm still new in TSQL. How can I output Scalar variables so that my vb code can access it?
in VB I use the rs method. In this case I will have to create 3 rs to be be able to access the data below. I would like to have a stored proc that can give me the 4 values I need without using multiple rs.
Create PROCEDURE [dbo].[sp_tblTransaction_GET_All_Totals]
#TransID bigint
AS
Declare #MyTotalCharges as money
Declare #MyTotalDiscounts as money
Declare #MyTotalPayments as money
Declare #TotalCharges as money
Declare #TotalDiscounts as money
Declare #TotalPayments as money
Declare #Balance as money
SELECT #MyTotalCharges = SUM(Amount)
FROM tblTransactionDetails
WHERE (TransID = #TransID)
SELECT #MyTotalDiscounts = SUM(Amount)
FROM tblTransaction_DP
WHERE (TransID = #TransID)
SELECT #MyTotalPayments = SUM(Amount)
FROM tblPayments
WHERE (TransID = #TransID)
--Below are the scalar values I need to be ouputed and accessed by my vb app.
--How can I output the values below?
#TotalCharges = #MyTotalCharges
#TotalDiscounts = #MyTotalDiscounts
#TotalPayments = #MyTotalPayments
#Balance = (#MyTotalCharges - #MyTotalDiscounts - #MyTotalPayments)

Answer 1

You need to return the values from the stored procedure as a table. Add this to your procedure.
SELECT
#TotalCharges as [Total Charges],
#TotalDiscounts as [Total Discounts],
#TotalPayments as [TotalPayments],
#Balance as [Balance]
Then you can execute the stored procedure from your VB app and load the table into a DataTable.
int transactionID = 0;
DataTable table = new DataTable();
using (var connection = new SqlConnection("connectionString")
using (var command = new SqlCommand("sp_tblTransaction_GET_All_Totals", connection)
{
connection.Open();
command.CommandType = CommandType.StoredProcedure;
command.Parameters.AddWithValue("#TransID", transactionID);
using (var adapter = new SqlDataAdapter(command))
{
adapter.Fill(table);
}
}
calling a stored procedure from C# using SqlDataAdapter
Here's the documentation on SqlDataAdapter, which will include examples in both C# and VB.
MSDN - SqlDataAdapter Class (System.Data.SqlClient)

Answer 2

Have you tried?
SELECT #Balance AS 'Balance', #TotalCharges AS 'TotalCharges' ...