c# - UpdateProgress not appearing on second click of same button -


updateprogress appear first time, when click on button btnsubmit. when click same button next time updateprogress not appearing. other things works well. using updateprogress show gif image while sending e-mail client. first client updateprogress appear second other 'n' updateprogress not appearing. please asking question second time in stack overflow

code below shows updateprogress

 <asp:updatepanel id="up1" runat="server">         <contenttemplate>             <asp:updateprogress id="updprogress"                 runat="server">                 <progresstemplate>                     <div class="modal">                         <div class="center">                             <span style="padding-left: 10px"><b>please wait..</b></span>                             <img alt="" src="../images/preloader_3.gif" width="50" height="50" />                         </div>                     </div>                 </progresstemplate>             </asp:updateprogress>         </contenttemplate>         <triggers>             <asp:asyncpostbacktrigger controlid="btnsubmit" eventname="click" />         </triggers>     </asp:updatepanel>

code below shows button trigger updateprogress

 <asp:updatepanel id="updatepanel1" runat="server">     <triggers>     <asp:asyncpostbacktrigger controlid="btnsubmit" eventname="click" />     </triggers>     <contenttemplate>     <div class="form-group row">         <div class="col-sm-6">             <div class="col-sm-6">                 <asp:button id="btnsubmit" onclick="btnsubmit_click"                     onclientclick="javascript:return btnsubmit();" cssclass="btn btn-primary"                     runat="server" text="submit" />                 <a href="assignment.aspx?sid=<%=request.querystring["sid"] %>" class="btn btn-default">cancel</a>             </div>         </div>     </div>     </contenttemplate>     </asp:updatepanel>

code behind cs

 protected void btnsubmit_click(object sender, eventargs e)     {         updprogress.visible = true;         sendemail(convert.toint32(drpdiv.text));         updprogress.visible = false;     }

you have place update progress outside update panel , associate update progress. can create update panel trigger button auto post true.

<asp:updateprogress id="updateprogress1" runat="server"                      associatedupdatepanelid="updatepanel1"> <progresstemplate>     <!-- place message here --> </progresstemplate> </asp:updateprogress>  <asp:updatepanel id="updatepanel1" runat="server">     <contenttemplate>         <asp:button id="btnsubmit" onclick="btnsubmit_click" runat="server"                      autopostback="true" />     </contenttemplate> </asp:updatepanel>  <asp:updatepanel id="updatepanel2" runat="server"> <contenttemplate>     <!-- can put controls here --> </contenttemplate>     <triggers>         <asp:asyncpostbacktrigger controlid="btnsubmit" eventname="click" />     </triggers> </asp:updatepanel>

or, second method is:

<asp:updateprogress id="updateprogress1" runat="server"                      associatedupdatepanelid="updatepanel1">     <progresstemplate>         <!-- place message here -->     </progresstemplate> </asp:updateprogress>  <asp:updatepanel id="updatepanel1" runat="server">     <contenttemplate>         <asp:button id="btnsubmit" onclick="btnsubmit_click" runat="server"                      autopostback="true" />     </contenttemplate>     <triggers>         <asp:asyncpostbacktrigger controlid="btnsubmit" eventname="click" />     </triggers> </asp:updatepanel>

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