c# - SQL Connection open but not read here -

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connection object & ado.net part getting error while insert data,first of here php coding part.here i'm going convert php codings .net

openconn(); //<user> slett <slettid> if((sizeof($messagearray)==3) && (strtolower($messagearray[1])=='slett'))  {  $user_id=$messagearray[2]; if ((int)$user_id > 0) {     $username=$messagearray[0];     $querycheckmak = "select count(*) xyz id='$user_id'";     $querycheckmak = odbc_exec($conn, $querycheckmak) or die("query error");     $user_number = odbc_result($querycheckmak, 1);      if($user_number=="0")     {         $message_out = "some error out ";     }

below coding try convert it.i convert.sizeof part & string lower case part.below here coding part used odbc connection in case sue sql server connection

public partial class seensms : system.web.ui.usercontrol {      public sqlconnection mycon;     sqlconnection con = new sqlconnection(@"data source=dsoft\domz;initial                 catalog=vilt;userid=sa;password=sa123");       protected void page_load(object sender, eventargs e)     {         string[] msg_arr = request.querystring["arr"].split('|');          if (!ispostback)         {             string moose = request.querystring[1];         }          if (msg_arr != null)         {             if ((msg_arr.length == 3) && (msg_arr[1].tolower() == "slett"))              {                 int user_id = convert.toint32(msg_arr[2]);                   if(user_id > 0)                 {                     string username = msg_arr[0];                       sqldatareader rdr = null;                     con.open();                     sqlcommand cmd = new sqlcommand("select count(*) xyz id='$user_id",con);                      if(user_number =='0')                        {                      response.writeline("error");                       // else part here                     }                  }             }           }     }

try this:

 sqlcommand cmd = new sqlcommand("select count(*) xyz user_id=@user_id,con));  ocmd.parameters.addwithvalue("@user_id", user_id);   int user_number = 0;                   con.open();    using (sqldatareader oreader = cmd.executereader())             {                                    while (oreader.read())                 {                    user_number =convert.toint32(oreader["count"]);                                                                            }                 myconnection.close();             }                                  if(user_number == 0)                    {                  response.writeline("error");                   // else part here                 }

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