.net 调用有返回值的存储过程

 代码里:

           SqlParameter[] paras = new SqlParameter[2];

            paras[0] = new SqlParameter("@Email", email);
            paras[1] = new SqlParameter("@Value",SqlDbType.Int);
            paras[1].Direction = ParameterDirection.ReturnValue;
            SqlHelper.ExecuteNonQuery(ConfigService.MassMailingCon, CommandType.StoredProcedure, "Proc_IsExistEmail", paras);

            int returnValue = (int)paras[1].Value;

 

 SQL语句:

            CREATE PROCEDURE Proc_IsExistEmail
    @Email varchar(64),
    @Value int =null out
AS
BEGIN
    if(not exists(select 0 from MassMailingList where emailto =@Email))
        return 0
    else
        return 1
END

注释:如果为ParameterDirection.ReturnValue 在存储过程里return value返回值,

如果为ParameterDirection.Output则要设置要设置输出参数 @Value的值