javascript - C# hidden field loses value in code behind -


i trying modify example. added new column in grid , in company details fieldset. when change value fieldset want store database , update grid. in grid implement this:

<listeners>      <selectionchange fn="onselectionchange" /> </listeners>

where in function set hidden field id of selected row:

hdnselid.value = rec.get('siteid'); //by using alert here can see value stored correctly

and when change value fieldset call directevent:

<directevents>       <blur onevent="unnamed_event" /> </directevents>

in codebehind in unnamed_event when try parse value of hidden field empty.

code

grid:

<ext:gridpanel                                     id="sitegrid"                                     runat="server"                                     flex="8"                                     storeid="storesites"                                     cls="my-custom-grid">                                     <tools>                                           <ext:tool type="refresh" tooltip="refresh" handler="#{storesites}.reload(); " />                                     </tools>                                     <columnmodel>                                         <columns>                                             <ext:column                                                 id="site"                                                 runat="server"                                                 text="site"                                                 dataindex="title"                                                 flex="9"                                                 />                                             <ext:column                                                 id="siteid"                                                 runat="server"                                                 text="id"                                                 dataindex="siteid"                                                 flex="1"                                                 align="center"                                                 />                                             <ext:column                                                 id="clmassessment"                                                 runat="server"                                                 text="assessment"                                                 dataindex="assessment"                                                 flex="3"                                                                                                    >                                                 <editor>                                                     <ext:textfield runat="server" id="txtassessment" />                                                 </editor>                                             </ext:column>                                         </columns>                                     </columnmodel>                                     <listeners>                                         <selectionchange fn="onselectionchange" />                                     </listeners>                                 </ext:gridpanel>

textarea in fieldset:

<ext:textarea id="txteditassessment"                                             runat="server"                                             fieldlabel="assessment"                                             name="assessment"                                              dataindex="assessment"                                              editable="true"                                                                                      >                                             <directevents>                                                 <blur onevent="unnamed_event" />                                             </directevents>                                         </ext:textarea>


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