存储过程的代码如下:

ALTER proc [dbo].[Get_Model_ByGroup]
(
	@groups varchar(200),
	@msg varchar(50)='' output
)
as
declare @sqlPage nvarchar(1000) --主语句

begin 
	set @sqlPage='select * from T_Model where moduleid in(select distinct moduleid from T_Groups_Model_Popedom where GroupsID in('+@groups+'))'
end
exec(@sqlPage)
if @@error<>0
begin
	set @msg='查询操作失败!'
	return 0
end
else
begin
	set @msg='查询操作成功!'
	return 1
end

 调用存储过程的C#代码如下:

try
            {
                SqlConnection conn = new SqlConnection(connectString);
                SqlCommand comm = new SqlCommand("Get_Model_ByGroup", conn);
                comm.CommandType = CommandType.StoredProcedure;

                SqlParameter paramgroups = new SqlParameter("@groups", SqlDbType.VarChar, 200);
                paramgroups.Value = groups;
                comm.Parameters.Add(paramgroups);

                SqlParameter paramreturnmsg = new SqlParameter("@msg", SqlDbType.VarChar, 50);
                paramreturnmsg.Direction = ParameterDirection.Output;
                comm.Parameters.Add(paramreturnmsg);

                SqlParameter paramreturnvalue = new SqlParameter("@return", SqlDbType.Int, 4);
                paramreturnvalue.Direction = ParameterDirection.ReturnValue;
                comm.Parameters.Add(paramreturnvalue);

                SqlDataAdapter da = new SqlDataAdapter(comm);
                da.Fill(result.returnDt);

                result.returnMsg = paramreturnmsg.Value.ToString();
                result.returnValue = (int)paramreturnvalue.Value;

            }
            catch (Exception)
            {
                
                throw;
            }
            return result;

 

SqlParameter.Direction 属性

获取或设置一个值,该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数。

ParamenterDirection.Inupt为默认值,只可输入

ParameterDirection.ReturnValue,只可输出