[Solved] DataBinding Issue Inside telerik details column

[Alex]

Hi,
I have a telerik gridview for which I created a  row details column. the details template looks smth like this

<telerik:RadGridView.RowDetailsTemplate>

<DataTemplate>

<Grid>

<Grid Margin="0,0,0,0" HorizontalAlignment="Left" Width="80" Height="155" VerticalAlignment="Top">

        <Rectangle Fill="Gray" Height="21" Stroke="Black" VerticalAlignment="Top"/>

        <sdk:Label HorizontalAlignment="Right" Height="13" Margin="0,6,5,0" VerticalAlignment="Top" Width="auto"  Content="Description"/>

<telerik:RadGridView Margin="0,20,0,0" ShowColumnHeaders="True" ShowGroupPanel="False" ItemsSource="{Binding GridProvisions}" RowIndicatorVisibility="Collapsed" AutoGenerateColumns="False" VerticalAlignment="Top">

        <telerik:RadGridView.Columns>

        <telerik:GridViewDataColumn Width="*"  Header="Total" DataMemberBinding="{Binding Total, Mode=OneWay}" TextAlignment="Center"  IsReadOnly="True" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

and so on...

The problem is that the data won't bind.
If I place the same grid outside the details column it works perfectly. Maybe I'm missing something, I'm new to silverlight.
I have the same problem with a rad combo box placed inside a gridview celltemplate.

I apreciate if someone could help, I'm stuck.

Thanks.

[Vlad]

Hello Alex,

 The DataContext of the inner control is actually the parent data item. This code:

ItemsSource="{Binding GridProvisions}" 

will look for property GridProvisions on the parent data item - most probably you do not have such. 

Regards,
Vlad
the Telerik team

[Alex]

I'm glad to see te post works now, but I didn't get an answer how should I acces my Datasource from outside the parent?

I saw an example which looked like this
ItemsSource={Binding DataContext.GridProvisions ElementName=LayoutRoot}
but didn't seam to work for me.
Any Ideas? I don't know how to fix this


Thanks,
Alex

[Yavor Georgiev]

Hi Alex,

 Unfortunately, Silverlight does not support bindings like the one you saw. You will need to either expose your ViewModel as a StatisResource and reference it from the Binding's Source property, or use a DataContextProxy.

Greetings,
Yavor Georgiev
the Telerik team

[Alex]

Hi Yavor,

I will try your suggestion.
Thanks for your support so far.

Alex

[Alex]

Hi again,

I've created a DataContextProxy  just like here 
http://weblogs.asp.net/dwahlin/archive/2009/08/20/creating-a-silverlight-datacontext-proxy-to-simplify-data-binding-in-nested-controls.aspx

And now my code looks like this 

<sdk:Page.Resources>

<local:AppDataSource x:Key="AppDataSourceDataSource" d:IsDataSource="True"/>

<local:DataContextProxy x:Key="DataContextProxy" />

</sdk:Page.Resources>

<telerik:RadGridView Margin="0,20,0,0" ShowColumnHeaders="True" ShowGroupPanel="False"

ItemsSource="{Binding Source={StaticResource DataContextProxy},Path=DataSource.GridProvisions}"

RowIndicatorVisibility="Collapsed" AutoGenerateColumns="False" VerticalAlignment="Top">

             <telerik:RadGridView.Columns>

             <telerik:GridViewDataColumn Width="*"  Header="Total" DataMemberBinding="{Binding Total, Mode=OneWay}" TextAlignment="Center"  IsReadOnly="True" />

             </telerik:RadGridView.Columns>

             </telerik:RadGridView>

The problem is it  still won't bind.

Have I done something wrong? I'm out of ideeas. Any help is welcomed.

Thanks,
Alex

[Yavor Georgiev]

Hello Alex,

 Does the DataContextProxy receive the proper DataContext?

All the best,
Yavor Georgiev
the Telerik team

[Alex]

Hi Yavor,

It seamed that altough the DataContext  for the Proxy was set from this.DataContext which I assume is the page data context (which I set it after initializecomponent() with my data source  
LayoutRoot.Datacontext =  ViewModel.m_AppDataSource;)

didn't took it .

However I directly set the datacontext in class definition  with my DataSource and it populates just fine now.

Thanks a lot!