IE9 - System.ArgumentException at browser history navigation in Silverlight 4 navigation application with custom attached DependencyProperty for Hyperlinkbutton

hello

i have strange problem ie9 in silverlight navigation app. the sl app consists of frame in display 4 pages. if call pages in loose order 1 @ time clicking on hyperlinkbutton in sl app , use browser history only move backwards, works fine in generell.

but iff then navigate forward in browser history, code ends running code in navigationfailed event , throws system.argumentexception. an evaluation of e.uri when debugging indicates value of uri empty.

also, system.argumentexception thrown if navigates through pages of pages in following order:

starting point: home page1 (frame.navigate(...) in constructor called mainpage.xaml.vb)

action: click on hyperlinkbutton p2-> navigate page2

action: click on button in browser-> navigation page1

action: click on forward button in browser-> navigate page2

action: click on button in browser-> navigationfalied() system.argumentexception (empty uri)

the historical data displayed in browser right clicking on forward or backward button correspond historical sequence of page views.

the journalownership property of frame has value auto.

i recently installed ie9 (x32). previously using ie8 (x 32). in ie8 (x 32) problem not occure, same code.

looking source of error, have checked how other navigation applications behave, have developed. the result there problem doesn't appear.

i therefore assume error source in special project in error thrown. that why i'll show essential source below.

a few notes on project's source code:

task of project test use of custom attached dependencyproperty (iskeepfocusvisualproperty), have created. this attached dependencyproperty has task manage 2 visualstates (isselected and isnotselected) of additional visualstategroup (keepfocusvisualstates) customized hyperlinkbutton template. these visualstates simulate the focus clicked hyperlinkbutton visually, even when hyperlinkbutton has no longer the focus. thus, hyperlinkbutton receive visual indicator displayed page.

the attached dependencyproperty iskeepfocusvisualproperty is defined in class hyperlinkbuttonextension.vb. it used in routine controlisselectedstate() in mainpage.xaml.vb. controlisselectedstate() hangs on navigated() event of frame. in event handling value of iskeepfocusvisualproperty set dynamically each of hyperlinkbutton. set to true hyperlinkbutton, clicked, , set false other hyperlinkbuttons. in propertychangedcallback of iskeepfocusvisualproperty (oniskeepfocusvisualpropertychanged) visualstate isselected or visualstate isnotselected activated then, depending on whether new value of iskeepfocusvisualproperty true or false.

as said, works in ie8 (x32). since installed ie9 yesterday morning, system.argumentexception thrown described effects of flow when using browser history navigation.

this main source code of project (the rest of source code for the 4 pages):

mainpage.xaml:

 

<usercontrol xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  xmlns:silverlaw="clr-namespace:keephyperlinkbuttonfocusvisually.silverlaw"  xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"  mc:ignorable="d"  x:class="keephyperlinkbuttonfocusvisually.mainpage"  width="560"  height="600">   <grid x:name="layoutroot"  background="#ff282828">  <grid.rowdefinitions>  <rowdefinition height="80" />  <rowdefinition />  </grid.rowdefinitions>  <stackpanel x:name="spcontainer"  horizontalalignment="center"  orientation="horizontal"  verticalalignment="bottom">  <hyperlinkbutton x:name="hb1"  content="home"  verticalalignment="top"  style="{staticresource keepfocusvisualhyperlinkbuttonstyle}"  d:layoutoverrides="width"  tag="home"  margin="0,0,26,0" />  <hyperlinkbutton x:name="hb2"  content="labs"  tag="labs"  margin="0,0,26,0"   style="{staticresource keepfocusvisualhyperlinkbuttonstyle}" />  <hyperlinkbutton x:name="hb3"  content="solutions"  tag="solutions"  margin="0,0,26,0"   style="{staticresource keepfocusvisualhyperlinkbuttonstyle}" />  <hyperlinkbutton x:name="hb4"  content="about"  tag="about"  margin="0,0,26,0"   style="{staticresource keepfocusvisualhyperlinkbuttonstyle}" />  </stackpanel>  <button x:name="b1"  content="button"  horizontalalignment="left"  verticalalignment="top"  width="75" />  	<sdk:frame x:name="contentframe"   grid.row="1"   margin="20,20,20,40"/>  </grid> </usercontrol> 

 

silverlawhyperlinkbuttonstyle.xaml (ein resourcedictionary):

 

<resourcedictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  xmlns:keephyperlinkbuttonfocusvisually_silverlaw="clr-namespace:keephyperlinkbuttonfocusvisually.silverlaw"  xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  mc:ignorable="d">  <!-- hier werden einträge für ressourcenverzeichnisse definiert. -->  <style x:key="keepfocusvisualhyperlinkbuttonstyle"  targettype="hyperlinkbutton">  <setter property="foreground"  value="#ff73a9d8" />  <setter property="padding"  value="2,0,2,0" />  <setter property="cursor"  value="hand" />  <setter property="horizontalcontentalignment"  value="left" />  <setter property="verticalcontentalignment"  value="top" />  <setter property="background"  value="transparent" />  <setter property="template">  <setter.value>  <controltemplate targettype="hyperlinkbutton">  <grid background="{templatebinding background}"  cursor="{templatebinding cursor}">  <visualstatemanager.visualstategroups>  <visualstategroup x:name="commonstates">  <visualstate x:name="normal" />  <visualstate x:name="mouseover">  <storyboard>  <doubleanimation duration="0"   to="1"   storyboard.targetproperty="(uielement.opacity)"   storyboard.targetname="mouseovervisual"   d:isoptimized="true" />  </storyboard>  </visualstate>  <visualstate x:name="pressed" />  <visualstate x:name="disabled">  <storyboard>  <objectanimationusingkeyframes duration="0"   storyboard.targetproperty="visibility"   storyboard.targetname="disabledoverlay">  <discreteobjectkeyframe keytime="0">  <discreteobjectkeyframe.value>  <visibility>visible</visibility>  </discreteobjectkeyframe.value>  </discreteobjectkeyframe>  </objectanimationusingkeyframes>  </storyboard>  </visualstate>  </visualstategroup>  <visualstategroup x:name="focusstates">  <visualstate x:name="focused">  <storyboard>  <doubleanimation duration="0"   to="1"   storyboard.targetproperty="(uielement.opacity)"   storyboard.targetname="focusvisual"   d:isoptimized="true" />  </storyboard>  </visualstate>  <visualstate x:name="unfocused" />  </visualstategroup>  <!--additional visualstategroup holds 2 visualstates   indicate iskeepfocusvisualproperty visually -->   <visualstategroup x:name="keepfocusvisualstates">  <visualstate x:name="isnotselected" />  <visualstate x:name="isselected">  <storyboard>  <doubleanimation duration="0"   to="1"   storyboard.targetproperty="(uielement.opacity)"   storyboard.targetname="keepfocusvisual"   d:isoptimized="true" />  </storyboard>  </visualstate>  </visualstategroup>  </visualstatemanager.visualstategroups>  <textblock x:name="disabledoverlay"  foreground="#ffaaaaaa"  horizontalalignment="{templatebinding horizontalcontentalignment}"  margin="{templatebinding padding}"  text="{templatebinding content}"  visibility="collapsed"  verticalalignment="{templatebinding verticalcontentalignment}"  canvas.zindex="1" />  <contentpresenter x:name="contentpresenter"  contenttemplate="{templatebinding contenttemplate}"  content="{templatebinding content}"  horizontalalignment="{templatebinding horizontalcontentalignment}"  margin="{templatebinding padding}"  verticalalignment="{templatebinding verticalcontentalignment}" />  <!--this element responsible visual focus.-->  <textblock x:name="focusvisual"  horizontalalignment="{templatebinding horizontalcontentalignment}"  textwrapping="wrap"  text="{templatebinding content}"  verticalalignment="{templatebinding verticalcontentalignment}"  margin="{templatebinding padding}"  foreground="#ffd8d073"  opacity="0" />  <!--this element responsible visual effect on mouse over.-->  <textblock x:name="mouseovervisual"  margin="{templatebinding padding}"  textwrapping="wrap"  text="{templatebinding content}"  d:layoutoverrides="width, height"  horizontalalignment="{templatebinding horizontalcontentalignment}"  verticalalignment="{templatebinding verticalcontentalignment}"  canvas.zindex="1"  foreground="#99f3f3f2"  opacity="0" />  <!--this element responsible keeping focus visually.  element mandatory-->  <textblock x:name="keepfocusvisual"  margin="{templatebinding padding}"  textwrapping="wrap"  text="{templatebinding content}"  d:layoutoverrides="width, height"  horizontalalignment="{templatebinding horizontalcontentalignment}"  verticalalignment="{templatebinding verticalcontentalignment}"  opacity="0"  foreground="#ffd8d073" />  </grid>  </controltemplate>  </setter.value>  </setter>  </style> </resourcedictionary> 

 

hyperlinkbuttonextension.vb:

 

namespace silverlaw    public class hyperlinkbuttonextension    public shared function getiskeepfocusvisual(byval hb as hyperlinkbutton) as boolean   if hb is nothing then   throw new argumentnullexception("hyperlinkbutton")   end if   return cstr(hb.getvalue(iskeepfocusvisualproperty))   end function    public shared sub setiskeepfocusvisual(byval hb as hyperlinkbutton, byval value as boolean)   if hb is nothing then   throw new argumentnullexception("hyperlinkbutton")   end if   hb.setvalue(iskeepfocusvisualproperty, value)   end sub    public shared readonly iskeepfocusvisualproperty as dependencyproperty =  dependencyproperty.registerattached("iskeepfocusvisual",   gettype(boolean),   gettype(hyperlinkbutton),   new propertymetadata(new propertychangedcallback(addressof oniskeepfocusvisualpropertychanged)))    shared sub oniskeepfocusvisualpropertychanged(byval d as dependencyobject, byval e as dependencypropertychangedeventargs)   dim hb as hyperlinkbutton = ctype(d, hyperlinkbutton)   if hb is nothing then   throw new notsupportedexception("iskeepfocusvisual property valid hyperlinkbutton instance.")   end if   dim newvalue as boolean = cbool(e.newvalue)   ' active / deactivate isselected / isnotselected visual state:  if newvalue then   visualstatemanager.gotostate(hb, "isselected", true)   else   visualstatemanager.gotostate(hb, "isnotselected", true)   end if   end sub    end class   end namespace  

 

mainpage.xaml.vb:

 

partial public class mainpage 	inherits usercontrol   public sub new()  initializecomponent()   ' travers children of stackpanel;   ' please note: children inside stackpanel are  ' of type hyperlinkbutton. keep in mind when add  ' elements other of type hyperlinkbutton. in case  ' have implement additional code checks  ' type of each element before add delegate.  for each element as hyperlinkbutton in spcontainer.children  addhandler element.click, addressof navigatetosite  next   ' logic of keeping focus visually takes place in navigated() event.  ' benefit of navigated() event is, focus can kept when   ' user navigates app using browser history.  addhandler contentframe.navigated, addressof controlisselectedstate   ' here go initial site when app starts fisrt time.  navigatetosite(hb1, nothing)   end sub    private sub navigatetosite(byval sender as object, byval e as routedeventargs)   ' sender hyperlinkbutton user has clicked.  ' in xaml of each hyperlinkbutton set name of   ' page specific hyperlinkbutton shall navigate to  ' value tag property. provides get  ' page name , use value create uri.  contentframe.navigate(new uri("/" + ctype(sender, hyperlinkbutton).tag.tostring + ".xaml", urikind.relativeorabsolute))   end sub    private sub controlisselectedstate(byval sender as object, byval e as navigation.navigationeventargs)   ' set focus on plug-in  system.windows.browser.htmlpage.plugin.focus()   ' name part of targeted page  dim target as string = e.uri.originalstring.substring(1, e.uri.originalstring.indexof(cchar(".")) - 1)   ' travers stackpanel container, containing hyperlinkbuttons  for each elem in spcontainer.children   ' check if tag value of hyperlinbutton fits name of targeted page  if ctype(elem, hyperlinkbutton).tag.tostring = target then   ' if fits, set iskeepfocusvisualproperty true ...  elem.setvalue(silverlaw.hyperlinkbuttonextension.iskeepfocusvisualproperty, true)   ' set focus on hyperlinkbutton  ctype(elem, hyperlinkbutton).focus()   else   ' if doesn't fit, set iskeepfocusvisualproperty false  elem.setvalue(silverlaw.hyperlinkbuttonextension.iskeepfocusvisualproperty, false)   end if   next   end sub    private sub contentframe_navigationfailed(byval sender as object, byval e as system.windows.navigation.navigationfailedeventargs) handles contentframe.navigationfailed   dim debugstop as integer = 0   'contentframe.navigate(contentframe.currentsource)   e.handled = true   end sub   end class 

i have same problem hyperlinkbutton custom control has same functionality example above (holding additional visualstategroup in template 2 visualstates display isselectedproperty dependencyproperty of custom control visually). there running in ie8 , have same problem in ie9. if necessary, can possibly code custom control in addition post.any or idea on issue appreciated.

Expression  >  Expression Blend + SketchFlow