storeProcedure @flagysjh bit,

ALTER proc [dbo].[sp_pd_insertupdatetransconds]
                (@transcondcode varchar(20),
                @transcondcname varchar(20),
                @transcondename varchar(20),
                @codehelp varchar(20),
                @flagvisible bit,
                @flagzxjh bit,--bit!
                @flagysjh bit,
                 
                @opcode varchar(20),
                @flag varchar(20),
                @id int)
as
begin
    if(@flag=1) --新增
    begin
    insert into pd_transcond
                (transcond_code,
                transcond_cname,
                transcond_ename,
                code_help,
                flag_visible,
                flag_zxjh,
                flag_ysjh,
                cr_code,
                cr_time,
                op_code,
                op_time) 
    values
                (@transcondcode,
                @transcondcname,
                @transcondename,
                @codehelp,
                @flagvisible,
                @flagzxjh,
                 
                 

                @flagysjh,
                @opcode,
                getdate(),
                @opcode,
                getdate());
                print '添加成功';--------!
    end;
    else
--修改
    begin
    update pd_transcond set 
                transcond_code=@transcondcode,
                transcond_cname=@transcondcname,
                transcond_ename=@transcondename,
                code_help=@codehelp,
                flag_visible=@flagvisible, 
                flag_zxjh=@flagzxjh,
                flag_ysjh=@flagysjh,
                op_code=@opcode,
                op_time=getdate()
                where id=@id;
                print '修改成功';
    end;
end;

 SqlParameter flagysjh = com.Parameters.Add("@flagysjh", SqlDbType.Bit, 20);
        
        bool ysjhvisible;
        if (CheckBox3.Checked == true)
        {
            ysjhvisible = true;
        }
        else
        {
            ysjhvisible = false;
        }
        flagysjh.Value = ysjhvisible;

flagysjh.Value = (CheckBox3.Checked == true) ? true : false;

此时是true/false ，一旦保存进数据库后就因为 对应的数据类型是bit，而变成了1（true）/0（false）