WCF RIA Services

DatePicker DisplayDateStart DisplayDateEnd ?

D1d13r — Wed, 25 Nov 2009 20:09:53 GMT

Anybody knows why the following line of code returns the error "AG_E_PARSER_BAD_PROPERTY_VALUE" ?

<controls:DatePicker DisplayDateStart="1950/01/01" DisplayDateEnd="2015/01/01" SelectedDate="{Binding ReleaseDate, Mode=TwoWay}"></controls:DatePicker>

Error Details:

   at System.Windows.Ria.OperationBase.InvokeCompleteAction()
   at System.Windows.Ria.OperationBase.Complete(Object result)
   at System.Windows.Ria.LoadOperation.Complete(DomainClientResult result)
   at System.Windows.Ria.DomainContext.CompleteLoad(IAsyncResult asyncResult)
   at System.Windows.Ria.DomainContext.<>c__DisplayClass17.b__13(Object )

Showing the WCF Ria.Net Login Form?

bobg2009 — Fri, 27 Nov 2009 07:46:49 GMT

Hi Guys,

This is probably simple, but I want to display the Business App login Screen ( the the November Update).

At the moment I am just checking to see if they are authenticated ( not looking at roles yet) and if they aren't I redirect them back to the mainpage and show a messagebox. Instead I wish to display the login form. Here is my code. Any help is appreciated.

public partial class Profile : Page
    {
        public Profile()
        {
            InitializeComponent();
            this.Loaded += new RoutedEventHandler(Form_Loaded);
        }

        void Form_Loaded(object sender, RoutedEventArgs e)
        {
            if (!WebContext.Current.User.IsAuthenticated)
            {
                Frame objContainer = this.Parent as Frame;
                if (objContainer != null)
                {
                  objContainer.Navigate(new Uri("/Welcome", UriKind.Relative));

                    MessageBox.Show("You must be logged in to access this page");

                }
            }
        }
    }
}

DomainDataSource cause MemoryLeak when FilterDescriptor is used

swo — Fri, 27 Nov 2009 15:28:50 GMT

I'm using VS2008 / WCF RIA Service / BusinessApplication Template.

On one Page I use the DomainDataSource with FilterDescriptor

<navigation:Page x:Class="EBFaktura.Views.MemLeakPage" 
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
           xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
           xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                  
           xmlns:riaControls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Ria"
           xmlns:riaData="clr-namespace:System.Windows.Data;assembly=System.Windows.Controls.Ria"
           xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data" 
           xmlns:dataFormToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.DataForm.Toolkit"
           xmlns:controlsToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit" 
           xmlns:ddc="clr-namespace:EBFaktura.Web"
           mc:Ignorable="d"
           xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           d:DesignWidth="640" d:DesignHeight="480"
           Title="MemLeakPage Page">
    <Grid x:Name="LayoutRoot">
        <riaControls:DomainDataSource x:Name="dds" QueryName="GetKunden" AutoLoad="true" LoadSize="40" >
            <riaControls:DomainDataSource.SortDescriptors>
                <riaData:SortDescriptor>
                    <riaData:Parameter ParameterName="{x:Null}" Value="Name"/>
                </riaData:SortDescriptor>
            </riaControls:DomainDataSource.SortDescriptors>



            <riaControls:DomainDataSource.FilterDescriptors>
            <riaData:FilterDescriptorCollection>
                <riaData:FilterDescriptor PropertyPath="Name" Operator="Contains">
                    <riaControls:ControlParameter ControlName="Filter" PropertyName="Text" RefreshEventName="TextChanged" />
                </riaData:FilterDescriptor>
            </riaData:FilterDescriptorCollection>
        </riaControls:DomainDataSource.FilterDescriptors>

            <riaControls:DomainDataSource.DomainContext>
                <ddc:EBFakturaDomainContext/>
            </riaControls:DomainDataSource.DomainContext>

        </riaControls:DomainDataSource>
        <StackPanel Orientation="Vertical">
            <TextBlock  Grid.Row="1" Text ="Filter:" Margin="0,3,0,0" HorizontalAlignment="Left" VerticalAlignment="Center"  />
            <TextBox  Grid.Row="1" x:Name="Filter" Margin="43,3,0,3"/>

        </StackPanel>


    </Grid>
</navigation:Page>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Navigation;

namespace EBFaktura.Views
{
    public partial class MemLeakPage : Page
    {
        public MemLeakPage()
        {
            InitializeComponent();
        }
        ~MemLeakPage()
        {
            Console.WriteLine("Set Breakpoint");
        }

        // Executes when the user navigates to this page.
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }

    }
}

If i do this, the MemLeakPage will never destroyed until Application ends. I checked this with a breakpoint in the MemLeakPage destructor. If I close the Application the destructor will called for each instance of the page. Also System.GC.Collect() didn't help. If i comment the FilterDescription out, all works well.

Unable to redirect to my SL4 app on forms authentication

spbgeb — Sun, 22 Nov 2009 14:15:13 GMT

I am using the SL4 sample walkthrough application for custom forms authentication (CusomtAuthSample). In this example, the authentication is being performed within the SL4 application. In the Web.config, I want to redirect the user to this SL application if they have not been authenticated. Here is what I have put into the Web.config file:

   <authentication mode="Forms">
         <forms loginUrl="CustomAuthSampleTestPage.aspx" name=".ASPXFORMSAUTH" />
    </authentication>
    <authorization>
         <deny users="?" />
    </authorization>

The purpose is to use the SL4 app as the authentication (logon) page. If any other page is accessed, and the user has not logged on, they will be directed to CustomAuthSampleTestPage.aspx, which invokes the SL4 app.

However, when the SL app is invoked, the following error is generated:

Error: Unhandled Error in Silverlight Application
Code: 2103
Category: InitializeError
Message: Invalid or malformed application: Check manifest

If I comment out the <authorization> section of Web.config, the SL app runs fine. Has anyone successfully been able to use a SL app as the "logon" page, and rediect the user there should they not be logged on, then use the SL app for authentication?

WCF RIA Services - Configuring a WCF Behavior and client side WCF Config

OmniFrank — Thu, 26 Nov 2009 18:40:13 GMT

Hi, I am looking for an example where someone did configure an end-to-end scenario where they were able to configure the WCF RIA Service on the server as well as on the client. I am trying to return more than 65K objects from my service and WCF has a limitation that needs to be overridden through a behavior to let it manage bigger object graphs. It's simple in normal WCF and SL clients which uses the web references but I don't know what to do to fall under the intended RIA way. Thanks for any pointers.

Second Silverlight app, Referencing problem

Pexxx — Fri, 27 Nov 2009 13:39:21 GMT

Using VS2008 and the Rai beta I did the following:

1. Create a new Silverlight Business Application.
2. Compile: no problem.
3. On the properties of the web project, Silverlight app tab, i added a new Silverlight app, Ria enabled.
4. Compilation of this new client goes wrong:
C:\VS2008\SPL\ILO\ILO.Client.Tutor\Generated_Code\ILO.Server.Web.g.cs(277,90): error CS0234: The type or namespace name 'Resources' does not exist in the namespace 'ILO.Server.Web'

How can I solve this problem?

How do I send my object in ServiceOperation method

SilverDjon — Fri, 27 Nov 2009 12:20:30 GMT

Hi, I have no great knowledge of Silverlight and RIA Services, but I have to solve one problem

I need to send MyCustomObject object or my List<T> in [ServiceOperation] a method for processing the information received. But an error message (Service operation named 'MySend' does not conform to the required signature. Both return and parameter types must be an entity type or one of the predefined serializable types.)

small example

//Server

[EnableClientAccess()]
public class DomainService1 : LinqToEntitiesDomainService {
	[ServiceOperation]
	public bool MySend(IEnumerable ContactList) {
		foreach(T Contact in ContactList) {
			//...
		}
		return true;
	}
}
 //Client

Button_Click (
	IEnumerable C;
	InvokeOperation<bool> obj = _DS.MySend(C);
}

or ather example with shared class

/*MyClass.shared.cs*/
class MyClass{

List list1;
List list2;
List list3;

}

[ServiceOperation]
public bool MySend(MyClass Obj) {
return true;
}

and error:
The entity 'Shared.MyClass' does not have a key defined. Entities exposed by DomainService operations must have must have at least one property marked with the KeyAttribute.

How to be?

PS: Please forgive me for my bad English

Receiving events when a database changes

spbgeb — Sat, 18 Jul 2009 03:12:22 GMT

Is there any way for a SL3 application using RIA Services to receive events when the contents of a database table changes? For example, a user's SL3 application shows a schedule on the screen that is based on the contents of an appointment table. When another user adds an appointment to the table, I want to detect this in the SL3 applications, and update the screen (without having to poll the database, or requiring the user to press a refresh button). Possible?

"Remember Me" not remembering on IE

vidalsasoon — Fri, 27 Nov 2009 02:47:54 GMT

Bug to reproduce:

- I create a new Silverlight project in VS 2008 using the "Business Application" template.

- I don't change a single line of code and run the application.

- I create an account and check the "Remember Me" option.

- I login and everything ok.

- I close the browser and restart it but my logged in user has been forgotten with IE!

This bug does not exist with Firefox. Also this bug did not exist with previous versions of Ria Services.

can i make a ria call that waits for a value to change in the database to return the new value?

Wigen — Sat, 07 Nov 2009 00:07:29 GMT

I want to be able to monitor a table and wait for a value in a row to change, so i can bring back some values. How could i do this on the server side?

Publishing Silverlight 3 RIA services App.

MoHassan — Sat, 15 Aug 2009 20:47:43 GMT

My Silverlight 3 application is using RIA Services, it works fine on Visual Studio 2008 environment but when I publish the site on the web server there is no data just the UX will show. Do I need to take any special steps?I am using SQL database on a remote server, do I need to make any changes to my connection string?

This is the only part I hate about Silverlight there is always some problems during the publishing phase.

Here is the site www.somaliplay.com please check it out Thank you,

Hassan

Call backs / Server calls client

bklooste — Fri, 27 Nov 2009 02:31:51 GMT

Is there anyway to hande WCF callbacks or the Server call the client when an event occurs. It doesnt matter if this runs on Silverlight 4 , whether its comes back on the http channel or whether it opens a new tcp socket.

Any ideas , polling is just too expensive ?

Beta breaking change: query rewriting eats ExpressionType.Convert

Casimodo72 — Mon, 23 Nov 2009 17:42:21 GMT

Hi,

The new internal QuerySerializer (in System.Windows.Ria.Services) removes an Expression with ExpressionType.Convert, thus leading to an exception in the following scenario.

I'm getting the following error:

'Ein Ausdruck vom Typ "System.DateTime" kann nicht für den Rückgabetyp "System.Object" verwendet werden.'
(Naive translation: 'An expression of type "System.DateTime" cannot be used for return type "System.Object"')

Using Expression.Convert(...) worked fine with the previous version of RIA Services.

Does the current behaviour of the query serializer mean that Expression.Convert(...) is not going to be supported any more, or is this just a bug in the Beta?

Scenario:
[Note that this uses the internal QuerySerializer which is normally not accessible to ordinary people like me ;-) ]

public class MyTestEntity : Entity
{
    public DateTime CreationDate
    { get; set; }
}

void TestOrderBy<T>(string propertyName)
    where T : Entity
{
    IQueryable<T> q = new T[0].AsQueryable<T>();

    ParameterExpression param = Expression.Parameter(typeof(T), "o");

    // The property "CreationDate" is of type DateTime.
    PropertyInfo prop = typeof(T).GetProperty(propertyName, BindingFlags.Public | BindingFlags.Instance);

    var memberExp =
        // Need to use Expression.Convert(...) here.
        Expression.Convert(
            Expression.Property(param, prop),
            typeof(object));

    var expression = Expression.Lambda<Func<T, object>>(memberExp, param);

    q = q.OrderByDescending(expression);

    foreach (ServiceQueryPart part in QuerySerializer.Serialize(q))
    {
        Console.WriteLine("operator: " + part.QueryOperator);
        Console.WriteLine("expression: " + part.Expression);
    }
}

Call this with:
TestOrderBy<MyTestEntity>("CreationDate");

The Expression with ExpressionType.Convert is eliminated in ExpressionVisitor.VisitUnary(...).
The exception occurs in ExpressionVisitor.VisitLambda(...) afterwards.

Regards,
Kasimier

OOB service call issue when RootVisual is not assigned

Casimodo72 — Tue, 17 Nov 2009 14:37:30 GMT

Hi,

I tried to call a RIA Service in my "App.xaml.cs" *before* the RootVisual was being assigned.

Observations:

1) Works fine in browser mode.

2) In OOB mode the RIA Services' load operation callbacks are never called.

Questions:

1) Why do the RIA Services currently need the RootVisual be assigned in OOB mode?

2) Is this by design or a bug?
If a bug: is this issue intended to be fixed in the next drop?

Regards,
Kasimier

AutoCompleteBox and CanLoad problem

encoded — Fri, 27 Nov 2009 11:24:13 GMT

With the latest WCF RIA services, my FilterDescriptor bound to an AutoCompleteBox isn't working any more. If I continue typing in the AutoCompleteBox while the data source is refreshing, and CanLoad is false, an error is thrown.

The error suggests to disable FilterDescriptors while CanLoad is false, but disabling the AutoCompleteBox makes no sense - and completely kills its functionality.

Are there any workarounds? Why has this changed? I believe the way it used to work in the previous version was much better, and it allowed for a much more responsive user interface if the user could quickly change filters without them being disabled.

Problem on Using FilterDescriptors on Birth date in Domain datasource

nileshsathvara — Wed, 18 Nov 2009 12:39:07 GMT

hi all,

i have one problem regarding filterdescriptor on domain datasource, i have to use FilterDescriptor on Birth Date like this :

<riaControls:DomainDataSource x:Name="dsPatient" QueryName="Get_ET_M_PatientFilterQuery" LoadSize="100" AutoLoad="True">

<riaControls:DomainDataSource.QueryParameters>

<datagroup:Parameter ParameterName="Cp_id" Value="AA1AA1A1" />

</riaControls:DomainDataSource.QueryParameters>

<riaControls:DomainDataSource.DomainContext>

<App:PMSDataBaseDomainContext/>

</riaControls:DomainDataSource.DomainContext>

<riaControls:DomainDataSource.FilterDescriptors>

<datagroup:FilterDescriptorCollection>

<datagroup:FilterDescriptor PropertyPath="ET_M_Patient.mpt_pat_firstname" Operator="StartsWith">

<datagroup:ControlParameter ControlName="txtFirstName" ParameterName="Text" RefreshEventName="TextChanged" />

</datagroup:FilterDescriptor>

<datagroup:FilterDescriptor PropertyPath="ET_M_Patient.mpt_pat_lastname" Operator="StartsWith">

<datagroup:ControlParameter ControlName="txtLastName" ParameterName="Text" RefreshEventName="TextChanged" />

</datagroup:FilterDescriptor>

<datagroup:FilterDescriptor PropertyPath="ET_M_Patient.mpt_pat_birth_date">

<datagroup:ControlParameter ControlName="txtDOB" PropertyName="SelectedDate.Value.Date" RefreshEventName="SelectedDateChanged" />

</datagroup:FilterDescriptor>

</datagroup:FilterDescriptorCollection>

</riaControls:DomainDataSource.FilterDescriptors>

</riaControls:DomainDataSource>

<data:DataGrid x:Name="dgPatientSearch" AutoGenerateColumns="False" VerticalGridLinesBrush="White" ItemsSource="{Binding Data, ElementName=dsPatient}"

Margin="0,3,0,0" Background="White" RowBackground="#FF6FBBB5" Width="200" SelectedItem="{Binding ET_M_Patient.mpt_pat_unique_key,Mode=TwoWay}" AlternatingRowBackground="AliceBlue" MouseLeftButtonUp="dgPatientSearch_MouseLeftButtonUp">

<data:DataGrid.Columns>

<data:DataGridTemplateColumn Header="First Name" Width="60" >

<data:DataGridTemplateColumn.CellTemplate>

</DataTemplate>

</data:DataGridTemplateColumn.CellTemplate>

</data:DataGridTemplateColumn>

<data:DataGridTemplateColumn Header="Last Name" Width="60">

<data:DataGridTemplateColumn.CellTemplate>

</DataTemplate>

</data:DataGridTemplateColumn.CellTemplate>

</data:DataGridTemplateColumn>

<data:DataGridTemplateColumn Header="DOB" Width="60">

<data:DataGridTemplateColumn.CellTemplate>

</DataTemplate>

</data:DataGridTemplateColumn.CellTemplate>

</data:DataGridTemplateColumn>

</data:DataGrid.Columns>

</data:DataGrid>

if have to put like this (PropertyName="SelectedDate.Value.Date") on FilterDescriptors,then it doesnt show any data on DataGrid and if use like this (PropertyName="Text") on FilterDescriptors, it shows data on DataGrid. but it doesnt filter on txtDOB ,when i pass data like (6/2/1982) .

so pls give me any suggestion on this.

InvokeTimeout

chachaloco — Fri, 27 Nov 2009 10:53:28 GMT

Does anyone know how to set the Timout for WCF Ria Services Invoke methods?

Some Issues/Solutions upgrading several complex RIA Services Projects from July 09 to Nov 09 RIA

CodeFuzion — Tue, 24 Nov 2009 16:40:48 GMT

Some Issues and solutions I ran into Upgrading several complex RIA Services Projects from July 09 to Nov 09 WCF Flavor.

I am posting this to help anyone else out there not have to spend a sleepness night like I had to, to convert my projects over to the new WCF Ria Services. Hopefully this helps someone else in converting it with several of the issues I faced.

1)      Localization Issues Woes

Trying to integrate in the Localization Resource as the default Business Template has it is futile in an existing application if you have a multi-tier several project setup like I had

For Example: My project looked like the following:

Client:
     MyProject.Client – (The starter Silverlight App)
     MyProject.Data    -- (The RIA Service Class Library that gets added to several XAP Projects)
     MyProject.ExtensionX   -- (A project that needs to get dymanically loaded on usage)
     MyProject.ExtensionY   -- (another dynamically loaded Project)

Server:
     MyProject.Server – (The Web Server that launches this application – I don’t like *.Web)
     MyProject.Domain – (This is the Class Library that has the L2Sql, Models, DomainServices, etc.

Because of this structure, Localization Resources on the Server Side that you tie to the Metadata of your Model and linking them on the Silverlight side DOES NOT WORK. I spend over 5 hours looking for why that is, the documentation on MSDN was of no help. I finally figured out that based on the folder structure of your LINKED (add as a file link) Resource, from the server, on the Silverlight Project side, HAS TO MATCH the namespace of the Resource file on the Server.

The reason the default template works, is you will notice they have on the Silverlight side ./Web/Resources/Resource<something>.resx. This ties to the namespace of it on the Server: MyProject.Web.Resources.Resource<Something>. I think this is a weak way to do it, because I cant actually utilize it now. The way everything is broken down in my projects, I would have to link the Server side Resource in the MyPRoject.Data Project, and since my namespace is “MyProject.Data”, I can not create a folder structure to trick the Client into finding the Resource File (Note it has to be put into that project since my RIA Service Models are generated there). It will continuously give me a Resource Exception stating that it cannot find the Resource nor neutral version. It needs the Project to be MyProject, with a folder structure of ./Server/Resources/Resource<Something>.resx. I cannot accommodate this.

Please note that Localization that is client side (i.e. Resources in the Silverlight Side), work just fine. Its the Localization you are trying to link Server Side and Client Side. You may be asking why would you need to do this? Well if you want to use Data Annotations on your Model on the Server Side and have them use Localization values for names/descriptions and flow that up the the Client side, you need the same resource on both sides. And, as far as I can tell you cannot share them, you have to link them, as by the Business Template that comes with RIA Services.

2)      Authentication Woes

This one was tricky. It appears that you really have to make sure you have the exact correct Web.Config set exactly correct, or this will just not work (as well as any domain service).

What helped me:
Create a Business Application Ria Template.
Copy the modifications you made to that ones Web.Config, and copy that Web.Config back to your project.
Compile your application
Goto in your browser: http://myprojectName:<port>/Services/<Namespace-here-seperated-by-dashes-instead-of-periods>-<DomainServiceName>.svc
   Verify that it has no errors and you can view the WSDL.

I had errors with the Data Annotations, that was from the web config just slightly off.

I also had a strange issue with the database server not giving the info, I had to strangely remove the SQL Users permissions and add it back on my dev machine. Although, that’s not a ria service thing, but strange non-the-less.

3)      Domain Service Error – Could not Instantiate Domain Service (or something to that nature)

This one caused me much grief. My authentication Service and Registration Service was acting fine, but my Linq to Sql one was not working. I kept getting an error that it could not instantiate the service whenever I would call it. This worked perfectly fine in the July version.

The problem was (after an hour of being dumb founded) that I was using the Constructor of the Domain Service to specify the Linq to Sql Data Load options (for includes to be hydrated). This worked in the earlier version, but was choking on the WCF Version. I ended up overriding the CreateDataContext and setting the Data Load Options there and it started cooking along just fine.

To be clear, it would not bomb or error out in the constructor. I had no way to tell this was the issue, other than just remming out things. It appears though that they changed the order things are called just slightly that setting the Data Options at that part, was too early or too late and would cause the DataContext to bomb internally to Ria Services.

Ok, well I am going to have to cut this short. But I do plan on extending this list later today with more “Gotchas” I noticed, and I am sure I will notice even more. I encourage you guys/girls as a community to add to this list as well.

I am sorry for the lack of grammar, but my eyes are bloodshot and I am extremely tired. J.

I would also like to point out, while very frustrating to get working, the work done in the November 09 WCF Ria Services, is really nice. It is extremely quick, and now having it on top of WCF, gives us a world of options as developers. I just wish I could utilize the Add Service Reference and get all of the advantages of Shared Code and Ria Link. But beggars cant be choosey.

2-way binding Combobox in dataform - first item always selected on first 2

McQwerty — Mon, 23 Nov 2009 17:02:21 GMT

I have been stuck on this problem for 3 days and I believe I have read just about every post on the internet regarding the problem.

Some have encountered the exact issue but I have been unable to find a solution - please help!!

Problem Details;

I have created a sample application to demonstrate the problem available here;
http://cid-448270706ae49425.skydrive.live.com/browse.aspx/Public?authkey=vaHIQm5YNRA%24
The entity model relies on the table structure in the SQL database backup file also included in the zip file.

The solution consists of a view with a grid displaying 'People' records, each of which is linked via a foreign key to one 'Nationality' record.

When a person is selected in the grid, thier details are shown in a dataform below with all properties 2-way databound to controls in the dataform. The linked Nationality entity property of a person is bound to a combobox so the user can select a different nationality from the fixed list of Nationality records in the DB.

Please take a look at the sample app to replicate the problems below;

There are really 3 problems in one;

After restoring the DB and building the solution.
Run the app and navigate to the 'people view' page in the Silverlight application

Problem 1;
The first two times a row in the grid is selected the actual value of Nationality that should be reflected in the combobox is overwritten with the first value as it seems like Silverlight is binding first, then populating the combobox values and then selecting the first item. This only happens for the first two records as when the third and fourth are selected the comb shows the correct values from the DB.
This is the desired behaviour and would like to know how to achieve this for all items in the list without having the values overwritten on selections 1 and 2?

Problem 2;
If for example the 4th item is selected ('Fred Bloggs'), and the name changed, but not the nationality and then 'Cancel' is clicked, the name is returned to the original value as expected, but Silverlight again refreshes the combo and overwrites the previously correct value with the arbitrary first value in the list.
How can this prevented and the correct combo value preserved on cancel?

Problem 3;
If any of the people in the grid are selected, the value in the combo changed to any other value, and the Cancel button pressed, then an exception is thrown. "The specified Entity is not a member of this collection".
How can this be prevented and standard cancel functionality achieved i.e. value is reset back to pre-edit condition?

As can be seen from the application I have not written any code behind and am just using the standard xaml syntax to achieve what I think should be simple functionality.
I can't see why I am encountering the above issues with the combobox when everything seems to work fine with other controls and two-way binding.

Xaml below;

1    <navigation:Page x:Class="ComboBoxProblem.Views.PeopleView" 
2               xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
3               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
4               xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
5               xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
6    					 xmlns:datagrid="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
7               xmlns:dataform="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.DataForm.Toolkit" 
8    					 xmlns:riacontrols="clr-namespace:System.Windows.Controls;assembly=System.Windows.Ria.Controls" 
9    					 xmlns:app="clr-namespace:ComboBoxProblem"
10   					 xmlns:ds="clr-namespace:ComboBoxProblem.Web.Services" 
11   					 mc:Ignorable="d"
12              xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
13              d:DesignWidth="640" d:DesignHeight="480"
14              Title="PeopleView Page">
15   
16   	<navigation:Page.Resources>
17   		<ds:CBDomainContext x:Key="CBDomainContext" />
18   	</navigation:Page.Resources>
19   
20   	<Grid x:Name="LayoutRoot">
21   		<riacontrols:DomainDataSource x:Name="ddsPeople" QueryName="GetPerson" AutoLoad="True" DomainContext="{Binding Source={StaticResource CBDomainContext}}" >
22   		</riacontrols:DomainDataSource>
23   		<ScrollViewer	BorderThickness="0" VerticalScrollBarVisibility="Auto" Padding="12,0,12,0" Margin="-12">
24   			<StackPanel Margin="12,0,12,0" Orientation="Vertical">
25   					<TextBlock Text="Person List" Style="{StaticResource HeaderTextStyle}" />
26   
27   					<datagrid:DataGrid x:Name="PeopleGrid" MinHeight="100" 
28   													 ItemsSource="{Binding ElementName=ddsPeople, Path=Data}" SelectionMode="Single" IsReadOnly="True">
29   					</datagrid:DataGrid>
30   					<dataform:DataForm x:Name="PersonDetails" Header="Person Details" AutoEdit="True" 
31   														 AutoCommit="False" AutoGenerateFields="False"
32   														 CurrentItem="{Binding ElementName=PeopleGrid, Path=SelectedItem}">
33   						<dataform:DataForm.EditTemplate>
34   							<DataTemplate>
35   								<StackPanel>
36   									<dataform:DataField Label="Name">
37   										<TextBox Text="{Binding Name, Mode=TwoWay}" />
38   									</dataform:DataField>
39   									<dataform:DataField Label="Nationality">
40   										<Grid>
41   											<riacontrols:DomainDataSource x:Name="ddsNationalities" QueryName="GetNationality"  AutoLoad="True" DomainContext="{Binding Source={StaticResource CBDomainContext}}"></riacontrols:DomainDataSource>
42   											<ComboBox x:Name="cbNationality"
43   																  ItemsSource="{Binding Data, ElementName=ddsNationalities}"
44   																  SelectedItem="{Binding Nationality, Mode=TwoWay}"
45   																  DisplayMemberPath="DisplayName"/>
46   										</Grid>
47   									</dataform:DataField>
48   								</StackPanel>
49   							</DataTemplate>
50   						</dataform:DataForm.EditTemplate>
51   					</dataform:DataForm>
52   				</StackPanel>
53   		</ScrollViewer>
54   	</Grid>
55   </navigation:Page>
56   
57

Thanks!!

Matt

SubmitChanges operation is already in progress on this DomainContext

Dexploratio — Sat, 11 Apr 2009 14:55:18 GMT

System.InvalidOperationException was unhandled by user code
Message="A SubmitChanges operation is already in progress on this DomainContext."
StackTrace:
       at System.Windows.Ria.Data.DomainContext.SubmitChanges(Object userState)
       at System.Windows.Ria.Data.DomainContext.SubmitChanges()
       at Dennky.Presentation.GameBoard.gamecontext_Loaded(Object sender, LoadedDataEventArgs e)
       at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
       at System.Windows.Ria.Data.DomainContext.OnLoaded(LoadedDataEventArgs e)
       at System.Windows.Ria.Data.DomainContext.CompleteLoad(IAsyncResult asyncResult)
       at System.Windows.Ria.Data.DomainContext.<>c__DisplayClass11.<>c__DisplayClass14.<Load>b__10(Object )
InnerException:

I keep getting this error.. even though I only use the context.submitchanges() method once in my class,
and I only let the code continue once the context.Submitted eventhandler has been raised...

I really have no clue what I'm doing wrong >_>

I even made sure to set all similar contexts to null upon exiting other silver usercontrols before opening this one so I'm out of ideas :p

Here's the code:

private GameContext gamecontext = new GameContext();

private void cmdReady_Click(object sender, RoutedEventArgs e)
        {
            brdReady.Visibility = Visibility.Collapsed;
            brdWaiting.Visibility = Visibility.Visible;
            playerready = true;
            gamecontext.LoadGames();
            gamecontext.Loaded += new EventHandler<LoadedDataEventArgs>(gamecontext_Loaded);
        }

private void gamecontext_Loaded(object sender, LoadedDataEventArgs e)
        {                    
                    foreach (Game g in e.LoadedEntities)
                    {
                        if (userMe == 1)
                        {
                            if (g.User1 == playerMe.ID)
                            {
                                g.User1RDY = true;
                            }
                        }
                        if (userMe == 2)
                        {
                            if (g.User2 == playerMe.ID)
                            {
                                g.User2RDY = true;
                            }
                        }
                    }
                    gamecontext.SubmitChanges();
                    gamecontext.Submitted += new EventHandler(gamecontext_Submitted);
        }

private void gamecontext_Submitted(object sender, SubmittedChangesEventArgs e)
        {
            waiting4player = true;
            gamecontext = new GameContext();
            gameTicker.Begin();
        }

Migrating existing Web forms app to Silverlight app + WCF RIA Services?

vutl — Fri, 27 Nov 2009 05:36:04 GMT

Hi there,

I'm new to Silverlight and WCF RIA Services. I'm researching on how to migrate my existing system to Silverlight and would be very appreciated if anyone can help me out of my dead end.

Currently I have a traditional n-tiers system with three layers: DAL (MSSQL, Codesmith + .nettiers template), BL (custom logic based on WF rule engine, exposed as WCF services), PL (ASP.Net pages). My goals are to convert/migrate the existing system to pure a Silverlight app, using WCF RIA Services and minimize rewrite existing code. Some of the questions I have are:
- should/could I reuse the DAL code (entities+CRUD generated by Codesmith + .nettiers) or should I re-create them with WCF RIA?
- to minimize rewriting code, it is preferable to reuse DAL+BL code and only create new GUI with Silverlight controls. However I also want to make full use of WCF RIA Services, how should I go about to do this?
- is there any guideline, best practices for migrating to Silverlight app and WCF RIA Services?

Thanks,
/vutl

DomainContext.SubmitChanges and ChildWindow problem

Durip1 — Sat, 26 Sep 2009 10:08:22 GMT

Hello, i use childwindow with dataform to edit row from datagrid. I have edit button on every row on datagrid

private void btnEdit_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            editAddWin win = new editAddWin();
            win.Closed += new EventHandler(win_Closed);
            win.HasCloseButton = false;
            win.newZiak = datagrid1.SelectedItem as BusinessApplication1.Web.Ziaci;

            win.Show();
        }

I have Save button in editAddWin

private void SaveButton_Click(object sender, RoutedEventArgs e)
        {
            if (dataform1.CommitEdit())
            {
                this.DialogResult = true;
                Close();
            }
        }

And when childwindow is closed, win_Closed event in main page is fired

void win_Closed(object sender, EventArgs e)
        {
            var win = sender as editAddWin;

            if (win.DialogResult == true)
            {
                myData.DomainContext.SubmitChanges();
            }
        }

And I have problem with SubmitChanges(), it throw Exception "A SubmitChanges operation is already in progress on this DomainContext." I think no submit operation is in progres, web debugging proxy program didnt show any comunication with server.

I try call myData.DomainContext.SubmitChanges() with other button from main page and this worked OK.
Any advice?

How to Get XML (as a String) calling a Store Procedure ??

NunoSenica — Tue, 24 Nov 2009 12:23:59 GMT

Hi all,

I'm new at RIA Services and it's been difficult for me to accomplish my goal. You're help is very much appreciated.

I've a Store Procedure "GetPerson(Guid personId)" which is visible in my Entity Data Model - Function Imports The Code is:

SELECT * FROM Persons WHERE (Id = @personId) FOR xml auto

My goal is to retreive that XML as a string instead of instatiating and populating a Person Class.

Any example would be great!

Thanks for your help.

Nuno.

Functions for WCF Ria .Net Authentication

bobg2009 — Fri, 27 Nov 2009 04:44:26 GMT

Hi Guys,

I've been searching the web ( obviously not doing a good job of it ).

But I'm looking for some basic documentation that explains using the Authentication services in WCF Ria .Net

cheers.

WCF Buniess App - Control access to pages.

bobg2009 — Fri, 27 Nov 2009 04:09:35 GMT

Hi Guys,

Can anone give any advice on how I can force someone to log in before they can navigate to a page in the default business App?

I was using http://www.olsonsoft.com/blogs/stefanolson/post/Displaying-a-login-dialog-based-on-page-attributes-in-Silverlight-3.aspx

from Stephan Olson, which worked perfectly. However since the November update I can't get it working.

I'm struggling to build similar functionality into my application now.

If anyone can help it is much appreciated.

cheers.