Calling stored procedure with return value

You need to add return parameter to the command:

using (SqlConnection conn = new SqlConnection(getConnectionString()))using (SqlCommand cmd = conn.CreateCommand()){    cmd.CommandText = parameterStatement.getQuery();    cmd.CommandType = CommandType.StoredProcedure;    cmd.Parameters.AddWithValue("SeqName", "SeqNameValue");    var returnParameter = cmd.Parameters.Add("@ReturnVal", SqlDbType.Int);    returnParameter.Direction = ParameterDirection.ReturnValue;    conn.Open();    cmd.ExecuteNonQuery();    var result = returnParameter.Value;}

I know this is old, but i stumbled on it with Google.

If you have a return value in your stored procedure say "Return 1" - not using output parameters.

You can do the following - "@RETURN_VALUE" is silently added to every command object. NO NEED TO EXPLICITLY ADD

    cmd.ExecuteNonQuery();    rtn = (int)cmd.Parameters["@RETURN_VALUE"].Value;

The version of EnterpriseLibrary on my machine had other parameters.This was working:

        SqlParameter retval = new SqlParameter("@ReturnValue", System.Data.SqlDbType.Int);        retval.Direction = System.Data.ParameterDirection.ReturnValue;        cmd.Parameters.Add(retval);        db.ExecuteNonQuery(cmd);        object o = cmd.Parameters["@ReturnValue"].Value;