c# - Multiple push refresh button -

-

this code shows select query in listview.

on second push of button "refresh", duplicates result, , on third enter in catch "error".

i don't understand why second works (not because duplicate, works) , on third there error.

public void button1_click(object sender, eventargs e) {     sqlcommand cm = con.createcommand();     cm.commandtext = "select * h_facturi_clienti";      try     {         sqldatareader dr = cm.executereader();                                      while (dr.read())         {             listviewitem item = new listviewitem(dr["h_id"].tostring());             item.subitems.add(dr["serie"].tostring());             item.subitems.add(dr["numar"].tostring());             item.subitems.add(dr["id_partener"].tostring());             item.subitems.add(dr["data"].tostring());             item.subitems.add(dr["valoare"].tostring());             listview1.items.add(item);                           }     }     catch (exception)     {         statuslbl.text = "eroare ";     } }

did forget clear listview before re-loading it?

listview1.items.clear(); //then load list

did forget close sqldatareader after finish using?

dr.close();

Comments

Post a Comment

Popular posts from this blog

ruby - Trying to change last to "x"s to 23 -

-
i have been playing around irb , have string looks this: irb(main):072:0> puts ["[\"4354 5432 5432 xxxxx\", \"6547 6547 8543 xxxxx\", \"2344 6543 6674 xxxxx\", \"2346 6236 7543 xxxxx\", \"1273 5585 5587 xxxxx\"]"] => nil irb(main):073:0> what want gsub last 2 "x" s of each 17 digit combination, 23 . what i've tried far (i've been using rubular): a.gsub(/\d[x]/,"23") <= grabs "x" s i'm close a.gsub(/\w[x{2}]/,"23") <= grabs "x" s grabs two digits each combination. is there easier way i'm not understanding? a.gsub(/\d{4} \d{4} \d{4} xxx\kxx/, '23') \d{4} = 4 digits what \k drop matched far. can use don't replace entire number, still able validate have in desired format.
Read more

jquery - Clone last and append item to closest class -

-
this bare-bones code on page: <div class="list-container"> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> </div> <p><button class="add-list-item">add</button></p> <div class="list-container"> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> </div> <p><button class="add-list-item">add</button></p> <di...
Read more

css - Can I use the :after pseudo-element on an input field? -

-
i trying use :after css pseudo-element on input field, not work. if use span , works ok. <style type="text/css"> .mystyle:after {content:url(smiley.gif);} .mystyle {color:red;} </style> this works (puts smiley after "buu!" , before "some more") <span class="mystyle">buuu!</span>a more this not work - colors somevalue in red, there no smiley. <input class="mystyle" type="text" value="somevalue"> what doing wrong? should use pseudo-selector? note: cannot add span around input , because being generated third-party control. :after , :before not supported in internet explorer 7 , under, on elements. it's not meant used on replaced elements such form elements (inputs) , image elements . in other words it's impossible pure css. however if using jquery can use $(".mystyle").after("add smiley here"); api docs on .after to ...
Read more