asp.net Title Labels not populating from variables on page load -

i have declared variables , populated dropdownlists in asp. on pageload labels aren't populating, populate once change values in dropdowns. variables working labels, not on page load.

protected sub page_load(sender object, e eventargs) handles me.load      dim strdatacollection string = ddldatacollection.text     dim stryear string = ddlyear.text     dim strsubject string = ddlsubject.text     dim strteachinggroup string = ddlteachinggroup.text     dim strsubgroup string = ddlsubgroup.selecteditem.text      lblheaderyear.text = "year " & stryear     lblheaderdatacollection.text = " " & strdatacollection     lblheadersubject.text = " " & strsubject     lblheaderteachinggroup.text = " " & strteachinggroup     lblheadersubroup.text = " " & strsubgroup      if strteachinggroup = "select all"         lblheaderteachinggroup.visible = false     else         lblheaderteachinggroup.visible = true     end if      if strsubgroup = "select all"         lblheadersubroup.visible = false     else         lblheadersubroup.visible = true     end if  end sub 

the asp labels is:

<div class="centeronpage">           <asp:label id="lblheaderyear" runat="server" text="" cssclass="header"></asp:label>           <asp:label id="lblheaderdatacollection" runat="server" text="" cssclass="header"></asp:label>           <asp:label id="lblheadersubject" runat="server" text="" cssclass="header"></asp:label>           <asp:label id="lblheaderteachinggroup" runat="server" text="" cssclass="header"></asp:label>           <asp:label id="lblheadersubroup" runat="server" text="" cssclass="header"></asp:label> </div> 

edit answer

i created following prerender suggested below. included onprerender="page_prerender" in 1 of label elements , seemed trigger prerender.

protected sub page_prerender(sender object, e eventargs)      dim strdatacollection string = ddldatacollection.text     dim stryear string = ddlyear.text     dim strsubject string = ddlsubject.text     dim strteachinggroup string = ddlteachinggroup.text     dim strsubgroup string = ddlsubgroup.selecteditem.text      lblheaderyear.text = "year " & stryear     lblheaderdatacollection.text = " " & strdatacollection     lblheadersubject.text = " " & strsubject     lblheaderteachinggroup.text = " " & strteachinggroup     lblheadersubroup.text = " " & strsubgroup  end sub 

edit - ddl binding

<asp:label id="lblheaderyear" runat="server" text="" cssclass="header" onprerender="page_prerender"></asp:label> <asp:label id="lblheaderdatacollection" runat="server" text="" cssclass="header"></asp:label> <asp:label id="lblheadersubject" runat="server" text="" cssclass="header"></asp:label> <asp:label id="lblheaderteachinggroup" runat="server" text="" cssclass="header"></asp:label> <asp:label id="lblheadersubroup" runat="server" text="" cssclass="header"></asp:label> 

i've not checked it, think problem page_load time, there's no selectditem. suggest trying bind labels in prerender event, dropdowns should have selected items (the first 1 if didn't specify else)

edit :

you should prerender event :

protected sub page_prerender(sender object, e eventargs) handles me.load      dim strdatacollection string = ddldatacollection.text     dim stryear string = ddlyear.text     dim strsubject string = ddlsubject.text     dim strteachinggroup string = ddlteachinggroup.text     dim strsubgroup string = ddlsubgroup.selecteditem.text      lblheaderyear.text = "year " & stryear     lblheaderdatacollection.text = " " & strdatacollection     lblheadersubject.text = " " & strsubject     lblheaderteachinggroup.text = " " & strteachinggroup     lblheadersubroup.text = " " & strsubgroup  end sub 

note "handles me.load" after prerender event declaration. how override page's prerender event , pageload. should remove prerender event on labels in aspx page.

please note can make use of autoeventwireup page attribute :

<%@ page language="c#" autoeventwireup="true" codefile="default.aspx.cs" inherits="_default" %> 

this allow you, page events only, tell .net automatically override page events if method same name defined in codebehind. in other words, you'd able remove "handles me.xxx" after event declaration.