asp.net - Regarding to retrieve values inside the array -

-

hi creating online quiz in asp.net c#. have 1 form displays testlist in dropdownlist & start button. after clicking 2nd form appears, 2nd form shows 1 label question, radiobuttonlist answers ,next & checkbox review. creating array of random question ids in start button click event of 1stform. when click next button in 2nd form next random question appears, want array of questions checked review. used code arrays of values ( eg.10101) 1 true & 0 false follows want array of question ids checked:

        int[] = (int[])session["values"];//this array of random question ids created in 1st form         int g;         if (chkmark.checked == true)         {             g = 1;         }         else         {             g = 0;         }         int[] chkarray = new int[convert.toint32(session["counter"]) - 1];         int[] temp1 = (int[])session["arrofchk"];         int k, no;          if (temp1 == null)             no = 0;         else             no = temp.length;         (k = 0; k < no; k++)         {        chkarray[k] = temp1[k];         }         chkarray[j] = g;

personally, use dictionary<int, bool> this.

in key of dictionary, can store random question id, in value of pair, can store checked item state. might take more work refactor it, believe save lot of time in end when want more actions on quiz items.

using dictionary - or @ least chosen collection, think easier right data back.

for example, can work only if positions of both arrays same.

dictionary<int, bool> quizanswers = new dictionary<int, bool>(); // <questionid, checked>  // fill dictionary questions , answers for(int i=0;i<a.length;i++) {   if(temp1.length > i) // make sure don't indexoutofboundsexception   {     quizanswers.add(a[i], temp1[i] == 1);   } }  // answered question in array ( linq ) int[] checkedanswers = (from keyvaluepair<int, bool> pair in quizanswers                         pair.value == true                         select pair.key).toarray<int>();

the reason using dictionary here, because think it's neater having 2 separate arrays.

i believe should implement dictionary in quiz, in stead of arrays. if array indexes don't match, or want dynamically add question fixed size array, etc..

it's take consideration. hope out.


Comments

Post a Comment

Popular posts from this blog

php - What is the difference between $_SERVER['PATH_INFO'] and $_SERVER['ORIG_PATH_INFO']? -

-
what’s difference between $_server['path_info'] , $_server['orig_path_info'] ? how use them? when run print_r($_server) , path_info , orig_path_info not present in array. why not? how can enable them? i have read php manual on them, still don’t understand them. the path_info variable present if invoke php script this: http://www.example.com/phpinfo.php/hello_there it's /hello_there part after .php script. if don't invoke url that, there won't $_server["path_info"] environment variable. the porig_ prefix uncommon. path_info standard cgi-environment variable, , should never prefixed. did read that? (there issues around php3/php4 if invoked php interpreter via cgi-bin/ - hardly has such setups today.) for reference: http://www.ietf.org/rfc/rfc3875
Read more

fortran - Function return type mismatch -

-
i'm attempting recode old c++ program in fortran make use of lapack (i'm aware c++ have lapack++, i'm having lot of trouble installing it, gave up). i didn't have problems compilation, when had variables declared real . when started coding section of program required lapack, found parameters passed dsyev need double precision . tried change double precision (including changing hard coded numbers double precision counterparts, i.e. 0.0 -> 0.0d0) when try compile, following error of functions , subroutines i've written: error: return type mismatch of function <function> @ (1) (real(4)/real(8)) i'm not sure coming from, in program has been changed double precision. for example, i've declared following: double precision :: alpha(3),d(3),zeta1,zeta2 double precision :: a1(3),a2(3),d1(3),d2(3) double precision :: pi pi = 3.14159265359d0 alpha = (/0.109818d0, 0.405771d0, 2.22766d0/) d = (/0.444635d0, 0.535328d0, 0.154329d0 /) 10 i=1,3 ...
Read more

queue - mq_receive: message too long -

-
i implementing communication between 2 processes using queue. problem when call function mq_receive, error: message long. i have done following: struct mq_attr attr; long size = attr.mq_msgsize; .... // initializing queue "/gateway" int rc = mq_receive(gateway, buffer, size, &prio); if print size value, size=1, while when print same size program (got same mechanism), not long integer ( -1217186280 )... how can solve error?....so while size = 1, believe it's right "message long" why 1? p.s. have tried put : int rc = mq_receive(gateway, buffer, sizeof(buffer), &prio); but no result. it seems need read docs more carefully. when call mq_receive should pass size of destination buffer. this size must greater mq_msgsize attribute of queue . in addition, seems have error in queue attributes initialisation makes proper mq_receive call impossible. here standard message queue session: fill mq_attr struct ( doc ): struct mq_a...
Read more