asp.net - Data binding fails to change values for custom control inside GridView inside an UpdatePanel -


i creating gridview inside updatepanel this:

<asp:scriptmanager runat="server" enablepartialrendering="true" />  <div id="masterhistorydialog" style="display: none">     <asp:updatepanel runat="server" childrenastriggers="true" updatemode="always">         <triggers>             <asp:asyncpostbacktrigger controlid="historyrepeater" eventname="pageindexchanging" />         </triggers>         <contenttemplate>             <asp:gridview id="historyrepeater" autogeneratecolumns="false" runat="server" allowpaging="true" allowsorting="false" pagersettings-nextpagetext="next" pagersettings-previouspagetext="previous" pagesize="4" onpageindexchanging="historyrepeater_pageindexchanging">                 <columns>                     <asp:templatefield>                         <itemtemplate>                             <uc:customcalendarcontrol changeid='<%# databinder.eval(container.dataitem, "item1") %>' scheduleid='<%# databinder.eval(container.dataitem, "item2") %>' runat="server" />                         </itemtemplate>                     </asp:templatefield>                 </columns>             </asp:gridview>         </contenttemplate>     </asp:updatepanel> </div>

the pageindexchanging event fires expected, calling following event handler:

protected sub historyrepeater_pageindexchanging(sender object, e gridviewpageeventargs)     historyrepeater.pageindex = e.newpageindex     historyrepeater.datasource = getschedules()     historyrepeater.databind() end sub

customcalendarcontrol custom control.

i confirmed getschedules is, in fact, getting entire data set.

i page data , have 4 custom controls per page (total of 20 items on 5 pages). first page works correctly. however, when try navigate 1 of other pages, initialization of custom control fails because it's not getting actual values of changeid or scheduleid - they're 0.

it fails when call databind() because initialization of custom control depends on changeid , scheduleid being actual ids.

how can fix issue?

your problem has @ moment nested user controls populate client side content. happens first control , gridview, usercontrol has been build before values of changeid , scheduleid set.

one way solved manually call building of control parent.

first, modify usercontrol has public function display values

public string changeid { get; set; } public string scheduleid { get; set; }  protected void page_load(object sender, eventargs e) {     setucvalues(); }  public void setucvalues() {     label1.text = changeid;     label2.text = scheduleid; }   public property changeid string         end     set     end set end property  public property scheduleid string         end     set     end set end property  protected sub page_load(byval sender object, byval e eventargs)     setucvalues end sub  public sub setucvalues()     label1.text = changeid     label2.text = scheduleid end sub

next, add id usercontrol in gridview

<uc:customcalendarcontrol id="calendarcontrol" runat="server" changeid=

then in pageindexchanging, loop rows , call function

protected void historyrepeater_pageindexchanging(object sender, gridviewpageeventargs e) {     //databinding      foreach (gridviewrow row in historyrepeater.rows)     {         webusercontrol1 control = row.findcontrol("calendarcontrol") webusercontrol1;         control.setucvalues();     } }   protected sub historyrepeater_pageindexchanging(sender object, e gridviewpageeventargs)     'databinding      each row gridviewrow in historyrepeater.rows         dim control webusercontrol1 = ctype(row.findcontrol("calendarcontrol"),webusercontrol1)         control.setucvalues     next end sub

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