///
/// Simplify the creation of a Sql command object by allowing
/// a stored procedure and optional parameters to be provided
///
///
/// e.g.:
/// SqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName");
///
/// A valid SqlConnection object
/// The name of the stored procedure
/// An array of string to be assigned as the source columns of the stored procedure parameters
///
public static SqlCommand CreateCommand(SqlConnection connection, string spName, params string[] sourceColumns)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// Create a SqlCommand
SqlCommand cmd = new SqlCommand( spName, connection );
cmd.CommandType = CommandType.StoredProcedure;
// If we receive parameter values, we need to figure out where they go
if ((sourceColumns != null) && (sourceColumns.Length > 0))
{
// Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// Assign the provided source columns to these parameters based on parameter order
for (int index=0; index < sourceColumns.Length; index++)
commandParameters[index].SourceColumn = sourceColumns[index];
// Attach the discovered parameters to the SqlCommand object
AttachParameters (cmd, commandParameters);
}
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