调用存储过程

/// <summary>
    /// 获取存储过程返回值
    /// </summary>
    public void getReturnValue()
    {
        using (SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings[0].ToString()))
        {
            conn.Open();
            SqlCommand cmd = new SqlCommand("StoredProcedure1", conn);
            cmd.CommandType = CommandType.StoredProcedure;
            SqlParameter[] spr ={
                               new SqlParameter("@a",SqlDbType.Int),
                               new SqlParameter("@b",SqlDbType.Int)
                           };
            spr[0].Value = 1;
            spr[1].Value = 2;
            foreach (SqlParameter p in spr)
            {
                cmd.Parameters.Add(p);
            }

            cmd.Parameters.Add(new SqlParameter("@return", SqlDbType.Int));
            cmd.Parameters["@return"].Direction = ParameterDirection.ReturnValue;
            cmd.ExecuteNonQuery();
            Label1.Text = cmd.Parameters["@return"].Value.ToString();

        }
    }
    /// <summary>
    /// 获取存储过程输出参数的值
    /// </summary>
    public void getOutputValue()
    {
        using(SqlConnection conn=new SqlConnection(ConfigurationManager.AppSettings[0].ToString()))
        {
            conn.Open();
            SqlCommand cmd = new SqlCommand("StoredProcedure2", conn);
            cmd.CommandType = CommandType.StoredProcedure;
            SqlParameter p1 = new SqlParameter("@a", SqlDbType.Int);
            p1.Value = 1;
            SqlParameter p2 = new SqlParameter("@b", SqlDbType.Int);
            p2.Value = 2;
            SqlParameter p3 = new SqlParameter("@c", SqlDbType.Int);
            p3.Direction = ParameterDirection.Output;

            cmd.Parameters.Add(p1);
            cmd.Parameters.Add(p2);
            cmd.Parameters.Add(p3);

            cmd.ExecuteNonQuery();
            Label2.Text = cmd.Parameters[2].Value.ToString();

        }

    }