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Refresh CollectionViewSource (Entity Framework) bound control

Posted By:      Posted Date: September 16, 2010    Points: 0   Category :WPF
I can't believe I can't find an answer to this... I've created Entity Framework models generated from DB (SQL Server CE) I dragged an Entity from Data Sources to my MainWindow, automagically creating this XAML: <Window.Resources>     <CollectionViewSource x:Key="contentItemsViewSource" d:DesignSource="{d:DesignInstance my:ContentItem, CreateList=True}" /> </Window.Resources> <Grid DataContext="{StaticResource contentItemsViewSource}">     <DataGrid AutoGenerateColumns="False" EnableRowVirtualization="True" Height="Auto" HorizontalAlignment="Stretch" ItemsSource="{Binding}" Margin="0,22" Name="contentItemsDataGrid" RowDetailsVisibilityMode="VisibleWhenSelected" VerticalAlignment="Stretch" Width="Auto" DataContext="{Binding}" IsReadOnly="True" CanUserResizeRows="False">         <DataGrid.Columns>             <DataGridTextColumn x:Name="idColumn" Binding="{Binding Path=Id}" Header="Id" Width="SizeToHeader" Visibility="Hidden" />             <DataGridTex

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"The underlying provider failed on Open" - Entity Framework 4 starts after refresh


I have  deployed web-application on the hosting (asp.net 4.0, MS SQL 2008, IIS 7.0)

On the next day I have got this error message (I was the first, possible):

Inner Exception Type: System.Data.EntityException
Inner Exception: The underlying provider failed on Open.
Inner Source: System.Data.Entity
Inner Stack Trace:
at System.Data.EntityClient.EntityConnection.OpenStor

­eConnectionIf(Boolean openCondition, DbConnection storeConnectionToOpen, DbConnection originalConnection, String exceptionCode, String attemptedOperation, Boolean& closeStoreConnectionOnFailure)
at System.Data.EntityClient.EntityConnection.Open()
at System.Data.Objects.ObjectContext.EnsureConnection
at System.Data.Objects.ObjectQuery`1.GetResults(Nulla
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at System.Data.Objects.ObjectQuery`1.System.Collectio
at System.Collections.Generic.List`1..ctor(IEnumerabl
­e`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable
­`1 source)
at Controls_basket.loadBasket ................................................

Then I pressed "F5" in my browser and my App started successfully.

refresh entity framework


I hope I'll explian properly.

I've some code that do DB updates. There are 2 parts to it.

1. the EF call the Stored Procedure to update DB. (this is big existing logic. so I can't rewrite in linq)

2. the EF + linq also does some DB operation in the same method.  At some point, it uses the DB changes done by SP.


The problem is that, EF can't recognise the changes done by SP.

When EF fetches the data, it still has the old values.

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