i can't work using vs2012 windows phone. if create text box property validateonexceptions=true , throw exception in setter, exception not caught comes out in debug window:
a first chance exception of type 'system.argumentexception' occurred in phoneapp1.dll exception of type 'system.argumentexception' occurred in phoneapp1.dll not handled in user code system.windows.data error: cannot save value target source. bindingexpression: path='thingy' dataitem='phoneapp1.mycontext' (hashcode=38891250); target element 'system.windows.controls.textbox' (name=''); target property 'text' (type 'system.string').. system.reflection.targetinvocationexception: exception has been thrown target of invocation. ---> system.argumentexception: said don't type 'foo'! @ phoneapp1.mycontext.set_thingy(string value) --- end of inner exception stack trace --- @ system.runtimemethodhandle.invokemethod(object target, object[] arguments, signature sig, boolean constructor) @ system.reflection.runtimemethodinfo.unsafeinvokeinternal(object obj, object[] parameters, object[] arguments) @ system.reflection.runtimemethodinfo.invoke(object obj, bindingflags invokeattr, binder binder, object[] parameters, cultureinfo culture) @ system.reflection.runtimepropertyinfo.setvalue(object obj, object value, bindingflags invokeattr, binder binder, object[] index, cultureinfo culture) @ system.reflection.runtimepropertyinfo.setvalue(object obj, object value, object[] index) @ system.windows.clrpropertylistener.set_value(object value) @ system.windows.propertyaccesspathstep.set_value(object value) @ system.windows.data.bindingexpression.updatevalue(). i made toy example isolate issue - here's xaml:
<phone:phoneapplicationpage x:class="phoneapp1.mainpage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:phone="clr-namespace:microsoft.phone.controls;assembly=microsoft.phone" xmlns:shell="clr-namespace:microsoft.phone.shell;assembly=microsoft.phone" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:my="clr-namespace:phoneapp1;assembly=phoneapp1" mc:ignorable="d" fontfamily="{staticresource phonefontfamilynormal}" fontsize="{staticresource phonefontsizenormal}" foreground="{staticresource phoneforegroundbrush}" supportedorientations="portrait" orientation="portrait" shell:systemtray.isvisible="true"> <!--layoutroot root grid page content placed--> <grid x:name="layoutroot" background="transparent"> <grid.rowdefinitions> <rowdefinition height="auto"/> <rowdefinition height="*"/> </grid.rowdefinitions> <!--titlepanel contains name of application , page title--> <stackpanel x:name="titlepanel" grid.row="0" margin="12,17,0,28"> <textblock text="do not type 'foo' in box"/> <textbox text="{binding thingy, mode=twoway, validatesonexceptions=true}"/> </stackpanel> <!--contentpanel - place additional content here--> <grid x:name="contentpanel" grid.row="1" margin="12,0,12,0"> </grid> </grid> </phone:phoneapplicationpage> my main page:
/* imports snipped..*/ namespace phoneapp1 { public class mycontext { private string _thingy = string.empty; public string thingy { { return _thingy; } set { if (value == "foo") { throw new argumentexception("i said don't type 'foo'!"); } _thingy = value; } } public mycontext() { } } public partial class mainpage : phoneapplicationpage { // constructor public mainpage() { initializecomponent(); this.datacontext = new mycontext(); } } } i've scoured clues, seems pretty categorical should provide visual feedback when validateonexceptions=true, , supported wp8:
our program terminator validation of geo-coordinates using ierrorinfo , friends.
you'll find validation mechanism working, you'll need add correct styles visual state manager in control template. here's our validating textbox stye
<style x:key="validatingtextbox" targettype="textbox"> <setter property="fontfamily" value="{staticresource phonefontfamilynormal}"/> <setter property="fontsize" value="{staticresource phonefontsizemediumlarge}"/> <setter property="background" value="{staticresource phonetextboxbrush}"/> <setter property="foreground" value="{staticresource phonetextboxforegroundbrush}"/> <setter property="borderbrush" value="{staticresource phonetextboxbrush}"/> <setter property="selectionbackground" value="{staticresource phoneaccentbrush}"/> <setter property="selectionforeground" value="{staticresource phonetextboxselectionforegroundbrush}"/> <setter property="borderthickness" value="{staticresource phoneborderthickness}"/> <setter property="padding" value="2"/> <setter property="template"> <setter.value> <controltemplate targettype="textbox"> <grid background="transparent"> <visualstatemanager.visualstategroups> <visualstategroup x:name="validationstates"> <visualstate x:name="valid" > <storyboard duration="00:00:01"> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="warningellipse"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>collapsed</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="warningtext"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>collapsed</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> </storyboard> </visualstate> <visualstate x:name="invalidunfocused"> <storyboard duration="00:00:01"> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="warningellipse"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>visible</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> <!-- note warning text not shown if unfocused --> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="warningtext"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>collapsed</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> </storyboard> </visualstate> <visualstate x:name="invalidfocused"> <storyboard> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="warningtext"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>visible</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="warningellipse"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>visible</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> </storyboard> </visualstate> </visualstategroup> <visualstategroup x:name="commonstates"> <visualstate x:name="normal"/> <visualstate x:name="mouseover"/> <visualstate x:name="disabled"> <storyboard> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="enabledborder"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>collapsed</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="disabledorreadonlyborder"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>visible</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> </storyboard> </visualstate> <visualstate x:name="readonly"> <storyboard> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="enabledborder"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>collapsed</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> <objectanimationusingkeyframes storyboard.targetproperty="visibility" storyboard.targetname="disabledorreadonlyborder"> <discreteobjectkeyframe keytime="0"> <discreteobjectkeyframe.value> <visibility>visible</visibility> </discreteobjectkeyframe.value> </discreteobjectkeyframe> </objectanimationusingkeyframes> <objectanimationusingkeyframes storyboard.targetproperty="background" storyboard.targetname="disabledorreadonlyborder"> <discreteobjectkeyframe keytime="0" value="{staticresource phonetextboxbrush}"/> </objectanimationusingkeyframes> <objectanimationusingkeyframes storyboard.targetproperty="borderbrush" storyboard.targetname="disabledorreadonlyborder"> <discreteobjectkeyframe keytime="0" value="{staticresource phonetextboxbrush}"/> </objectanimationusingkeyframes> <objectanimationusingkeyframes storyboard.targetproperty="foreground" storyboard.targetname="disabledorreadonlycontent"> <discreteobjectkeyframe keytime="0" value="{staticresource phonetextboxreadonlybrush}"/> </objectanimationusingkeyframes> </storyboard> </visualstate> </visualstategroup> <visualstategroup x:name="focusstates"> <visualstate x:name="focused"> <storyboard> <objectanimationusingkeyframes storyboard.targetproperty="background" storyboard.targetname="enabledborder"> <discreteobjectkeyframe keytime="0" value="{staticresource phonetextboxeditbackgroundbrush}"/> </objectanimationusingkeyframes> <objectanimationusingkeyframes storyboard.targetproperty="borderbrush" storyboard.targetname="enabledborder"> <discreteobjectkeyframe keytime="0" value="{staticresource phonetextboxeditborderbrush}"/> </objectanimationusingkeyframes> </storyboard> </visualstate> <visualstate x:name="unfocused"/> </visualstategroup> </visualstatemanager.visualstategroups> <border x:name="enabledborder" borderbrush="{templatebinding borderbrush}" borderthickness="{templatebinding borderthickness}" background="{templatebinding background}" margin="{staticresource phonetouchtargetoverhang}"> <grid> <grid.rowdefinitions> <rowdefinition height="auto" /> <rowdefinition height="auto"/> </grid.rowdefinitions> <contentcontrol grid.row="0" x:name="contentelement" borderthickness="0" horizontalcontentalignment="stretch" margin="{staticresource phonetextboxinnermargin}" padding="{templatebinding padding}" verticalcontentalignment="top"/> <ellipse grid.row="0" x:name="warningellipse" visibility="collapsed" margin="12,12,12,0" verticalalignment="top" horizontalalignment="right" width="14" height="14" stroke="#40000000" strokethickness="2" fill="red"> </ellipse> <textblock x:name="warningtext" grid.row="1" foreground="red" visibility="collapsed" textwrapping="wrap" margin="3,-12,3,0" text="{binding relativesource={relativesource templatedparent}, path=(validation.errors)[0].errorcontent, fallbackvalue=''}"></textblock> </grid> </border> <border x:name="disabledorreadonlyborder" borderbrush="{staticresource phonedisabledbrush}" borderthickness="{templatebinding borderthickness}" background="transparent" margin="{staticresource phonetouchtargetoverhang}" visibility="collapsed"> <textbox x:name="disabledorreadonlycontent" background="transparent" foreground="{staticresource phonedisabledbrush}" fontweight="{templatebinding fontweight}" fontstyle="{templatebinding fontstyle}" fontsize="{templatebinding fontsize}" fontfamily="{templatebinding fontfamily}" isreadonly="true" selectionforeground="{templatebinding selectionforeground}" selectionbackground="{templatebinding selectionbackground}" textalignment="{templatebinding textalignment}" textwrapping="{templatebinding textwrapping}" text="{templatebinding text}" template="{staticresource phonedisabledtextboxtemplate}"/> </border> </grid> </controltemplate> </setter.value> </setter> </style> 
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