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c# - Usage of Server Side Controls in MVC Frame work -

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i using asp.net 4.0 , mvc 2.0 web application. project requiremrnt have use server side control in application not possibl in noraml case. ideally want use adrotator control , datalist control. i saw few samples , references in codepleax mvc controllib howwver found less useful. can tell how utilize theese controls in asp.net application along mvc. note: please provide functionalities related adrotator , datalist controls not equivalent functionalities thanks in advace. mvc pages not use normal .net solution makes use of normal .net components impossible. a normal .net page use event driven solution call different methods service side mvc use actions , view completly different way handle things. also, mvc not use viewstate normal .net controlls require. found article discussing mixing of normal .net , mvc.
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mysqli - how to avoid duplication users in my db with php -

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how all,

hope every 1 here ok,

now have form admin can create users , can delete users let me display code first

this code 

> > <?php error_reporting(e_all); >  > session_start(); >   if(!isset($_session['login']) || > $_session['login']!='1' )         { >       header("location:loginpage.php"); >       } ?> >  > <!doctype html public "-//w3c//dtd > xhtml 1.0 transitional//en" > "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> > <html > xmlns="http://www.w3.org/1999/xhtml"> > <head> <meta http-equiv="content-type" > content="text/html; charset=utf-8" /> > <title>my control panel</title> <link > href="../css_style.css" > rel="stylesheet" type="text/css" /> > </head> >  >  >  > <body> <div id="werpper"> <div > id="content"> >  > <div id="header">my control - > panel</div> <div id="body_cntent">   > <div id="left_side">   <p>home , > instructions</p>   <p><a > href="../control_panel.php">main > directory</a></p>   <p><a > href="add_event.php">add new > event</a></p>   <p><a > href="../editoccasion.php">control > occasion's</a></p>   <p><a > href="add_photos_and_occasion.php">add > photos_occasion</a></p>   <p><a > href="../signout.php">sign out</a></p> > </div> <div id="right_side"> >  > <h2>add new user</h2> >  > <form action="" method="post"> >  > <table width="600" border="0" > cellpadding="5" cellspacing="0">   > <tr> >     <td width="78">user name</td> >     <td width="2">&nbsp;</td> >     <td width="149"><input type="text" name="uname" value="" /></td> >     <td width="332" rowspan="5" align="left" valign="top"><p > class="red">for administration use > only.</p> >       <p>you can add or delete users <a > href="edit_users.php">here</a><br /> >         can't edit user if change user account > can delete user , create > again new > information.</p></td>   </tr>   <tr> >     <td>password</td> >     <td>&nbsp;</td> >     <td><input type="text" name="pass" value="" /></td> >     </tr>   <tr> >     <td>&nbsp;</td> >     <td>&nbsp;</td> >     <td><input type="submit" name="submit" value="add user" /></td> >     </tr>   <tr> >     <td>&nbsp;</td> >     <td>&nbsp;</td> >     <td>&nbsp;</td> >     </tr>   <tr> >     <td>&nbsp;</td> >     <td>&nbsp;</td> >     <td align="right">&nbsp;</td> >     </tr> </table> </form> >  > </div> </div> >  > <div id="footer"></div> </div> </div> >  > <?php >       if (isset($_post['submit'])) { >               include_once "../config/config.php"; >               $uname = $_post['uname'];       $pass =$_post['pass']; >               $check = "select * users id = {$uname}";         $result_check > = $db->query($check)or die($db->error); >        >               while ($row = $result_check -> fetch_object()) { >                       if(num_rows == 1){ >                >               echo "error"; >                >               }else{ >               $add_user = "insert users (id, uname, pass) values ('', > '$uname', '$pass')"; >               $result = $db -> query($add_user) or die ("$db->error"); >               if ($result) { >                       echo "user added successfuly"; >                       }else{ >                >               echo "there error please try again later"; >                >               }           }       }   } ?> >  > </body> </html>

all need here know how solve problem of code 

$check = "select * users id = {$uname}";         $result_check = $db->query($check)or die($db->error);           while ($row = $result_check -> fetch_object()) {              if(num_rows == 1){                  echo "error";                  }

how can avoid duplication users in db

i'm not sure database library you're using , methods are, made plain mysql if went route of making uname (username) field unique index --

// instantiate database connection $db = mysql_connect( .. );  // assuming id field auto incrementing, can left out of query $add_user  = "insert users (uname, pass) "; $add_user .= "values ('" . mysql_real_escape_string($uname) . "', "; $add_user .= "'" . mysql_real_escape_string($pass) . "')";  if (mysql_query($add_user, $db)) {      if (mysql_affected_rows($db) == 1)     {         // new user added,     } }  else {      if (mysql_errno($db) == 1062)      {          // duplicate username,      }      else     {          // different database error occurred         die('error: ' . mysql_error());     }  }

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