databinding trigger

I try to create a ListBoxStyle associated with several templates. I would
like to bind dynamically each items to its corresponding template, according
to the value of a field on items.

Have you already use a Trigger with a Binding condition (source code below),
or is there an other way to do a such construction.

<Style x:Key="SmallRosterListItem" TargetType="{x:Type ListBoxItem}">
<Setter Property="Cursor" Value="Hand" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Template" Value="{StaticResource
item_SmallRosterDetails}" />

<Setter Property="Padding" Value="0,0,0,0" />
<Style.Triggers>
<Trigger Property="Binding XPath=gender" Value="Male">
<Setter Property="Template" Value="{StaticResource
item_BigRosterMale}" />
</Trigger>
</Style>

Hi Arnaud,

I you want to change the look of your items in the listbox depending on
a special value on this item you could try to implement your own custom
ItmeTemplateSelector class. This class decides with your application
logic which DataTemplate to choose.

This is what you want, I think: http://www.beacosta.com/

Chris

Arnaud Fontaine wrote:
> I try to create a ListBoxStyle associated with several templates. I would
> like to bind dynamically each items to its corresponding template, according
> to the value of a field on items.
>
> Have you already use a Trigger with a Binding condition (source code below),
> or is there an other way to do a such construction.
>
> <Style x:Key="SmallRosterListItem" TargetType="{x:Type ListBoxItem}">
> <Setter Property="Cursor" Value="Hand" />
> <Setter Property="Background" Value="Transparent" />
> <Setter Property="Template" Value="{StaticResource
> item_SmallRosterDetails}" />
>
> <Setter Property="Padding" Value="0,0,0,0" />
> <Style.Triggers>
> <Trigger Property="Binding XPath=gender" Value="Male">
> <Setter Property="Template" Value="{StaticResource
> item_BigRosterMale}" />
> </Trigger>
> </Style>

Arnaud Fontaine wrote:

> I try to create a ListBoxStyle associated with several templates. I
> would like to bind dynamically each items to its corresponding
> template, according to the value of a field on items.
>
> Have you already use a Trigger with a Binding condition (source code
> below), or is there an other way to do a such construction.

You would use a property trigger[1] on the property which value you want
to react to change the style of the template accordingly. If changing your
style depends on multiple properties, then use a multi-trigger[2].

HTH,
Drew

[1] http://windowssdk.msdn.microsoft.com...ws_Trigger.asp
[2] http://windowssdk.msdn.microsoft.com...ltiTrigger.asp

___________________________________
Drew Marsh
Chief Software Architect
Mimeo.com, Inc. - http://www.mimeo.com
Microsoft C# / WPF MVP
Weblog - http://blog.hackedbrain.com/

Hi Chris

This is exacltly what I was looking for. Thanks!!

Arnaud

"MueMeister" wrote:

> Hi Arnaud,
>
> I you want to change the look of your items in the listbox depending on
> a special value on this item you could try to implement your own custom
> ItmeTemplateSelector class. This class decides with your application
> logic which DataTemplate to choose.
>
> This is what you want, I think: http://www.beacosta.com/
>
> Chris
>
> Arnaud Fontaine wrote:
> > I try to create a ListBoxStyle associated with several templates. I would
> > like to bind dynamically each items to its corresponding template, according
> > to the value of a field on items.
> >
> > Have you already use a Trigger with a Binding condition (source code below),
> > or is there an other way to do a such construction.
> >
> > <Style x:Key="SmallRosterListItem" TargetType="{x:Type ListBoxItem}">
> > <Setter Property="Cursor" Value="Hand" />
> > <Setter Property="Background" Value="Transparent" />
> > <Setter Property="Template" Value="{StaticResource
> > item_SmallRosterDetails}" />
> >
> > <Setter Property="Padding" Value="0,0,0,0" />
> > <Style.Triggers>
> > <Trigger Property="Binding XPath=gender" Value="Male">
> > <Setter Property="Template" Value="{StaticResource
> > item_BigRosterMale}" />
> > </Trigger>
> > </Style>
>

I wrote:

> You would use a property trigger[1] on the property which value you
> want to react to change the style of the template accordingly. If
> changing your style depends on multiple properties, then use a
> multi-trigger[2].

Sorry, misunderstood the question. MueMeister was right, ItemTemplateSelector
is your friend.

Cheers,
Drew