Display Stored Procedure In Gridview

I'm using the code below to display table contents in gridview;

Code:
SqlConnection oConn = new SqlConnection(ConfigurationManager.AppSettings["constring"]);
SqlDataAdapter cmdGrid = default(SqlDataAdapter);
DataSet dsGrid = new DataSet();
cmdGrid = new SqlDataAdapter( "SELECT * From Table1", oConn)

[Code] ....

How about displaying stored procedure in gridview with this procedure?

Code:
ALTER procedure [dbo].[spRetrieve]
@iIDint
as
SELECT dbo.Table1.ProductID, dbo.Table1.Product
FROM dbo.Table1
WHERE (dbo.Table1.UserID = @iID)

How can i do that?