c# - WPF Task on Touch device not back properly to UI Thread -


i have wpf application background tasks done works on laptop not working fine in tablet windows 7.

you click screen, loading image shown while background job done, , @ end of job dialog info shown. press button on dialog , go main screen.

in tablet @ end when dialog shown have press screen once have gui "active" , again application detect click. ui thread gets "disabled" after background task , needs screen touch active again. quite annoying because user has press multiple times button action performed. behaviour happens in tablet, not on laptop...

here code:

public void processtouch(point p) {   task getpendingdocstask = task.factory.startnew(getpendingdocs, cancellationtoken.none,     taskcreationoptions.none, taskscheduler.default);   task aftergetpentingdocstask = getpendingdocstask.continuewith(w => aftergetpendingdocs(), taskscheduler.fromcurrentsynchronizationcontext());   }  private void getpendingdocs() {     thread.sleep(500);             }  private void aftergetpendingdocs() {                  mainprogresscircle.visibility = system.windows.visibility.hidden;      this.background = (brush)bc.convertfrom("#013857");      windowdialog adialog = new windowdialog(this);      adialog.showdialog();            }

in dialog function when click is:

private void button_click(object sender, routedeventargs e) {                this.close();           }

and xaml of button on dialog

<s:surfacebutton                                               margin="-4"                     borderbrush="transparent"                     borderthickness="0"                                                     width="200"                     height="75"                                             horizontalalignment="center"                                         name="openbutton"                      horizontalcontentalignment="center"                     verticalcontentalignment="center"                     fontfamily="tahoma"                     fontsize="20"                     content="aceptar"                      background="#78b41e"                      foreground="white"                     click="button_click"                       ismanipulationenabled="true"                     />

i have tried backgroundworker , dispatcher , behaviour same. works on regular computer not response fine on windows 7 touch device.

any clue wellcomed.

thanks in advance, ivan.


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