Installation
1. Manually uninstall the following via Add/Remove programs in Control Panel:- Microsoft Silverlight (any version prior to Silverlight 3 RTW)
- Microsoft Silverlight SDK
- Microsoft Silverlight Tools for Visual Studio 2008
3. Install the following:
- Silverlight 4 RC
- Silverlight 4 RC SDK
Creating a new WCF RIA Services application
1. Start Visual Studio2. On the File menu, click Newà Project. The New Project dialog is displayed.
3. In the Project types pane, expand Visual Basic or C#, then select Silverlight.
4. In the My Templates pane, select Silverlight Business Application.
5. Change the project name to ‘HRApp’. Click OK.
There are a couple of things to notice once the project is created:
- The solution created for you consists of two projects: a Silverlight client project called HRApp and an ASP.NET Web Application server project called HRApp.Web.
- The default application created for you has navigation, login/logout, new user registration enabled by default. Run the project and experiment with the default, out of the box application. When running the application for the first time, allow Visual Studio to Modify Web.config file to enable debugging.
Setting up the application
1. In the client project, open MainPage.xaml.2. Notice that the default XAML code (shown below) gets the application name from a resource.
XAML
<!-- XAML --><TextBlock x:Name="ApplicationNameTextBlock" Style="{StaticResource ApplicationNameStyle}" Text="{Binding ApplicationStrings.ApplicationName, Source={StaticResource ResourceWrapper}}"/>
3. In the client project, open the Assets folder, and in that folder open the Resources folder.
4. Open the ApplicationStrings.resx file, and change the ApplicationName resource to “HR Application”.
5. Save and close the ApplicationStrings.resx file.
6. In Solution Explorer, right click the HRApp project, select Add, and then select New Item. The Add New Item dialog box is displayed.
7. In the Categories pane, select Silverlight and in Templates pane, select Silverlight Page. Name the new item ‘EmployeeList.xaml’ and click Add.
8. Open EmployeeList.xaml and add the following XAML code between the <Grid> tags
9. Save the EmployeeList.xaml file.
10. In Solution Explorer, click EmployeeList.xaml and drag it to the Views folder.
11. If you are using Visual Basic, add the following Imports statement to EmployeeList.xaml.vb.
12. Open MainPage.xaml and add a new link button to top of the page by adding the XAML code between the two existing link buttons.
13. Run the application and you will notice a new link button (‘Employee List’) has been added.
2. In the Categories pane, select Data, and in the Templates pane, select ADO.NET Entity Data Model. Name the data model ‘AdventureWorks.edmx’ and click Add.
3. In the Entity Data Model Wizard, choose to generate the Model from an existing database and click Next.
4. Select the connection to the AdventureWorks database and then set the name of the entity connection settings to AdventureWorks_DataEntities.
5. Select Next.
6. Expand the Tables node and choose the Employee table to be used by the Entity Data model. Set the model namespace to ‘AdventureWorks_DataModel’.
7. Click Finish. The entity data model appears in the designer.
8. On the Build menu, select Build Solution.
2. In the Categories pane, select Web, and in the Templates pane, select Domain Service Class. Name the new item ‘OrganizationService’.
3. Click Add
8. On the Build menu, select
Build Solution.
Building the solution generates the Domain Context and entities in the client project.
9. In the client project, open EmployeeList.xaml.
10. Open the Toolbox. The Toolbox is available from the View menu.
11. Drag a DataGrid from the toolbox onto the XAML view for EmployeeList.xaml. Add the DataGrid inside of the StackPanel, just after the TextBlock.
Dragging a DataGrid into the XAML editor adds a reference to the
The prefix is set in the Page element.
12. Name the DataGrid ‘dataGrid1’ ,
make it read-only, and set its minimum height by adding the following
XAML..
13. Save EmployeeList.xaml and build the solution.
14. Open EmployeeList.xaml.cs/vb.
16. In the code generated for the client project, the
OrganizationContext is generated based on OrganizationService. Instantiate the
OrganizationContext class and load employee data by adding the following code (in bold) to
EmployeeList.xaml.cs/vb:
17. Run the application. Click the Employee List link when the application is loaded to see the DataGrid.
XAML
<!-- XAML --><ScrollViewer BorderThickness="0" VerticalScrollBarVisibility="Auto" Padding="12,0,12,0" Margin="-12"> <StackPanel Margin="0,12,0,12" Orientation="Vertical" > <TextBlock Text="Employee List" Style="{StaticResource HeaderTextStyle}"/> </StackPanel></ScrollViewer>
9. Save the EmployeeList.xaml file.
10. In Solution Explorer, click EmployeeList.xaml and drag it to the Views folder.
11. If you are using Visual Basic, add the following Imports statement to EmployeeList.xaml.vb.
Visual Basic
Imports System.Windows.Controls
12. Open MainPage.xaml and add a new link button to top of the page by adding the XAML code between the two existing link buttons.
XAML
<!-- XAML --><HyperlinkButton x:Name="Link3" Style="{StaticResource LinkStyle}" NavigateUri="/EmployeeList" TargetName="ContentFrame" Content="Employee List"/> <Rectangle x:Name="Divider2" Style="{StaticResource DividerStyle}"/>
13. Run the application and you will notice a new link button (‘Employee List’) has been added.
Adding Business Logic to a .NET RIA Services application
If you have the AdventureWorks database already installed feel free to use it; otherwise you can install one from CodePlex: http://msftdbprodsamples.codeplex.com/releases/view/4004Add a Data Source
1. In Solution Explorer, right-click the HRApp.Web project, select Add, and then select New Item. The Add New Item dialog box is displayed.2. In the Categories pane, select Data, and in the Templates pane, select ADO.NET Entity Data Model. Name the data model ‘AdventureWorks.edmx’ and click Add.
3. In the Entity Data Model Wizard, choose to generate the Model from an existing database and click Next.
4. Select the connection to the AdventureWorks database and then set the name of the entity connection settings to AdventureWorks_DataEntities.
5. Select Next.
6. Expand the Tables node and choose the Employee table to be used by the Entity Data model. Set the model namespace to ‘AdventureWorks_DataModel’.
7. Click Finish. The entity data model appears in the designer.
8. On the Build menu, select Build Solution.
Add a Domain Service Object and Query for Data
1. In Solution Explorer, right-click the HRApp.Web project, select Add, and then select New Item. The Add New Item dialog box is displayed.2. In the Categories pane, select Web, and in the Templates pane, select Domain Service Class. Name the new item ‘OrganizationService’.
3. Click Add
4. In the Add New Domain Service Class dialog, select
Employee from the Entities list, select Enable editing, and select
Generate associated classes for metadata. Also, ensure that the
Enable client access checkbox is checked.
5. Click OK.
6. In the OrganizationService.cs/vb file, you will see that a query method and the Create/Update/Delete (CUD) data methods have been added. The CUD data methods were added because Enable editing was selected.
7. Customize the select function by updating the GetEmployees() method to return the data sorted by EmployeeID.
Replace this generated code:
6. In the OrganizationService.cs/vb file, you will see that a query method and the Create/Update/Delete (CUD) data methods have been added. The CUD data methods were added because Enable editing was selected.
7. Customize the select function by updating the GetEmployees() method to return the data sorted by EmployeeID.
Replace this generated code:
C#Visual Basic
// C# public IQueryable<Employee> GetEmployees() { return this.ObjectContext.Employees; }
With the following code:
Visual BasicC#
'VBPublic Function GetEmployees() As IQueryable(Of Employee) Return Me.ObjectContext.Employees.OrderBy(Function(e) e.EmployeeID)End Function
Building the solution generates the Domain Context and entities in the client project.
9. In the client project, open EmployeeList.xaml.
10. Open the Toolbox. The Toolbox is available from the View menu.
11. Drag a DataGrid from the toolbox onto the XAML view for EmployeeList.xaml. Add the DataGrid inside of the StackPanel, just after the TextBlock.
Dragging a DataGrid into the XAML editor adds a reference to the
System.Windows.Controls.Data assembly and maps the
System.Windows.Controls namespace to a prefix. The prefix can be any
value. In this walkthrough, the examples are shown with the prefix set
to
data.
XAML
<!-- XAML --><data:DataGrid ></data:DataGrid>
The prefix is set in the Page element.
xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
XAML
<!-- XAML --><data:DataGrid Name="dataGrid1" MinHeight="100" IsReadOnly="True"></data:DataGrid>
13. Save EmployeeList.xaml and build the solution.
14. Open EmployeeList.xaml.cs/vb.
15. Add the following using/Imports statements:
Visual BasicC#
'VBImports System.ServiceModel.DomainServices.Client
Visual BasicC#
'VBImports System.Windows.ControlsImports System.ServiceModel.DomainServices.ClientPartial Public Class EmployeeList Inherits Page Dim _OrganizationContext As New OrganizationContext Public Sub New() InitializeComponent() Me.dataGrid1.ItemsSource = _OrganizationContext.Employees _OrganizationContext.Load(_OrganizationContext.GetEmployeesQuery())End Sub 'Occurs when the user navigates to this page. Protected Overrides Sub OnNavigatedTo(ByVal e As System.Windows.Navigation.NavigationEventArgs) End SubEnd Class
17. Run the application. Click the Employee List link when the application is loaded to see the DataGrid.
Add a Custom Query
1. In the HRApp.Web project, open OrganizationService.cs/vb.2. Add a new method called GetSalariedEmployees by adding the following code to the body of the class.
Visual BasicC#
'VBPublic Function GetSalariedEmployees() As IQueryable(Of Employee) Return Me.ObjectContext.Employees.Where(Function(e) e.SalariedFlag = True).OrderBy(Function(e) e.EmployeeID)End Function
3. On the Build menu, select Build Solution.
4. In the client project, open EmployeeList.xaml.cs/vb. A new query function is available in IntelliSense called OrganizationContext.GetSalariedEmployeesQuery.
5. In the constructor, replace the call to GetEmployeesQuery() with a call to GetSalariedEmployeesQuery() .
Visual BasicC#
'VB_OrganizationContext.Load(_OrganizationContext.GetSalariedEmployeesQuery())
6. Run the application and click the Employee List link. Notice that employees 1, 2, and 4 no longer appear in the list because they are not salaried.
Add a Domain Data Source
1. In the client project, open EmployeeList.xaml.2. Drag the DomainDataSource from the toolbox onto EmployeeList.xaml, just before the DataGrid.
3. Change the namespace prefix for System.Windows.Controls from my to riaControls.
XAML
xmlns:riaControls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.DomainServices"
4. For C# solutions, add the following namespace declaration to the XAML file:
XAML
<!— XAML for C# solutions -->xmlns:ds="clr-namespace:HRApp.Web"
For VB solutions, add the following namespace declaration to the XAML file:
XAML
<!-- XAML for VB solutions-->xmlns:ds="clr-namespace:HRApp"
5. Name the DomainDataSource ‘employeeDataSource’ and set the DomainContext , LoadSize, AutoLoad, and query method by adding the following XAML code:
XAML
<!-- XAML --> <riaControls:DomainDataSource Name="employeeDataSource" LoadSize="20" QueryName="GetSalariedEmployees" AutoLoad="True"></riaControls:DomainDataSource>
XAML
<!-- XAML --><riaControls:DomainDataSource Name="employeeDataSource" LoadSize="20" QueryName="GetSalariedEmployees" AutoLoad="True" > <riaControls:DomainDataSource.DomainContext> <ds:OrganizationContext/> </riaControls:DomainDataSource.DomainContext></riaControls:DomainDataSource>
7. Replace this DataGrid XAML:
XAML
<!-- XAML --><data:DataGrid Name="dataGrid1" MinHeight="100" IsReadOnly="True"></data:DataGrid>
with the following XAML:
XAML
<!-- XAML --><data:DataGrid Name="dataGrid1" MinHeight="100" IsReadOnly="True" Height="Auto" ItemsSource="{Binding Data, ElementName=employeeDataSource}" />
8. Open EmployeeList.xaml.cs/vb.
9. In the constructor, remove or comment out the code to instantiate the OrganizationContext instance, the call to GetSalariedEmployeesQuery(), and the code to set the DataGrid's ItemsSource.
You no longer need to explicitly load data, since the DomainDataSource will do this automatically.
Visual BasicC#
'VBPartial Public Class EmployeeList Inherits Page 'Dim _OrganizationContext As New OrganizationContext Public Sub New() InitializeComponent() '_OrganizationContext.Load(_OrganizationContext.GetSalariedEmployeeQuery()) 'Me.dataGrid1.ItemsSource = _OrganizationContext.Employees End Sub
10. Run the application and click the Employee List link. The application works as before.
Add Sorting/Filtering/Paging to the DataSource
1. Specify how data is sorted in the DataGrid by adding SortDescriptors to the DomainDataSource. Add the following XAML (in bold) to the DomainDataSource to sort the VacationHours column in Ascending order.
XAML
<!-- XAML --><riaControls:DomainDataSource Name="employeeDataSource" LoadSize="20" QueryName="GetSalariedEmployees" AutoLoad="True" > <riaControls:DomainDataSource.DomainContext> <ds:OrganizationContext/> </riaControls:DomainDataSource.DomainContext> <riaControls:DomainDataSource.SortDescriptors> <riaControls:SortDescriptor PropertyPath="VacationHours" Direction="Ascending" /> </riaControls:DomainDataSource.SortDescriptors></riaControls:DomainDataSource>
2. Run the application and click the Employee List link. The data will be sorted by Vacation Hours and you can change the sort direction by clicking on the column header.
3. Add the XAML code in bold below to EmployeeList.xaml. That will add support for filtering.
XAML
<!-- XAML --><navigation:Page x:Class="HRApp.EmployeeList" xmlns:ds="clr-namespace:HRApp.Web" xmlns:riaControls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.DomainServices" xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data" 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" mc:Ignorable="d" xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation" d:DesignWidth="640" d:DesignHeight="480" Title="EmployeeList Page"><Grid x:Name="LayoutRoot" Background="White"><ScrollViewer BorderThickness="0" VerticalScrollBarVisibility="Auto" Padding="12,0,12,0" Margin="-12"> <StackPanel Margin="0,12,0,12" Orientation="Vertical" > <TextBlock Text="Employee List" Style="{StaticResource HeaderTextStyle}"/> <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,-16,0,0"> <TextBlock VerticalAlignment="Center" Text="Min Vacation Hours Filter" /> <TextBox x:Name="vacationHoursText" Width="75" FontSize="11" Margin="4" Text="0"/> </StackPanel> <riaControls:DomainDataSource Name="employeeDataSource" LoadSize="20" QueryName="GetSalariedEmployees" AutoLoad="True"> <riaControls:DomainDataSource.DomainContext> <ds:OrganizationContext/> </riaControls:DomainDataSource.DomainContext> <riaControls:DomainDataSource.SortDescriptors> <riaControls:SortDescriptor PropertyPath="VacationHours" Direction="Ascending" /> </riaControls:DomainDataSource.SortDescriptors> <riaControls:DomainDataSource.FilterDescriptors> <riaControls:FilterDescriptor PropertyPath="VacationHours" Operator="IsGreaterThanOrEqualTo" IgnoredValue="" Value="{Binding ElementName=vacationHoursText, Path=Text}" > </riaControls:FilterDescriptor> </riaControls:DomainDataSource.FilterDescriptors> </riaControls:DomainDataSource> <data:DataGrid MinHeight="100" IsReadOnly="True" ItemsSource="{Binding Data, ElementName=employeeDataSource}" Name="dataGrid1" /> </StackPanel></ScrollViewer> </Grid></navigation:Page>
4. Run the Application and filter the Employee List using the “Min Vacation Hours Filter” Text Box
5. Drag a DataPager from the toolbox on to EmployeeList.xaml. Add the DataPager just below the DataGrid.
6. Set the page size to 5 and set the source by adding the following XAML to the DataPager:
XAML
<!-- XAML --><br><br><data:DataPager PageSize="5" Source="{Binding Data, ElementName=employeeDataSource}" Margin="0,-1,0,0"></data:DataPager><br>
7. Run the application and click the employee list link. You will see only 5 rows of filtered data per page and pager controls below the DataGrid.
Master Detail
Adding a DataForm
We will be using the DataForm Control from the SL 3 Toolkit for the Detail View. The Silverlight Business Application Project Template carries the System.Windows.Controls.Data.DataForm.Toolkit.dll binary in the ‘Libs’ Folder, hence our Project already has access to the DataForm Control.1. In the client project, open EmployeeList.xaml.
2. Add the following namespace declaration to EmployeeList.xaml.
XAML
<!-- XAML -->
xmlns:dataForm="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.DataForm.Toolkit"
3. After the DataPager control, add the XAML code below. The code adds the DataForm to the EmployeeList Page and sets the DataForm attributes and specifies the columns to be displayed.
<dataForm:DataForm x:Name="dataForm1" Header="Employee Information" AutoGenerateFields="False" AutoEdit="False" AutoCommit="False" CurrentItem="{Binding SelectedItem, ElementName=dataGrid1}" Margin="0,12,0,0">
<dataForm:DataForm.EditTemplate>
<DataTemplate>
<StackPanel>
<dataForm:DataField Label="Employee ID">
<TextBox IsReadOnly="True"
Text="{Binding EmployeeID, Mode=OneWay}" />
</dataForm:DataField>
<dataForm:DataField Label="Login ID">
<TextBox Text="{Binding LoginID, Mode=TwoWay}" />
</dataForm:DataField>
<dataForm:DataField Label="Hire Date">
<TextBox Text="{Binding HireDate, Mode=TwoWay}" />
</dataForm:DataField>
<dataForm:DataField Label="Marital Status">
<TextBox Text="{Binding MaritalStatus, Mode=TwoWay}" />
</dataForm:DataField>
<dataForm:DataField Label="Gender">
<TextBox Text="{Binding Gender, Mode=TwoWay,NotifyOnValidationError=True, ValidatesOnExceptions=True }" />
</dataForm:DataField>
<dataForm:DataField Label="Vacation Hours">
<TextBox Text="{Binding VacationHours, Mode=TwoWay,NotifyOnValidationError=True, ValidatesOnExceptions=True }" />
</dataForm:DataField>
<dataForm:DataField Label="Sick Leave Hours">
<TextBox Text="{Binding SickLeaveHours, Mode=TwoWay,NotifyOnValidationError=True, ValidatesOnExceptions=True }" />
</dataForm:DataField>
<dataForm:DataField Label="Active">
<CheckBox IsChecked="{Binding CurrentFlag, Mode=TwoWay,NotifyOnValidationError=True, ValidatesOnExceptions=True }" />
</dataForm:DataField>
</StackPanel>
</DataTemplate>
</dataForm:DataForm.EditTemplate>
</dataForm:DataForm>
4. Run the application and click the employee list link. The DataForm displays details of the item selected in the DataGrid.
Updating the Database
Updating a record
Checking the Enable editing option in the New Domain Service Class wizard caused CUD methods to be generated automatically in the domain service layer (OrganizationService class). In order to use these methods to update the database, you will add editing buttons to the user interface of the employee list.1. In the client project, open EmployeeList.xaml.
Add a ‘Submit’ button just after the DataForm tags by adding the following XAML code.
XAML
<!-- XAML --> <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,12,0,0"> <Button x:Name="submitButton" Width="75" Height="23" Content="Submit" Margin="4,0,0,0" Click="submitButton_Click"/> </StackPanel>
3. Handle the button click event in EmployeeList.xaml.cs/vb by adding the following code:
Visual BasicC#
'VB Private Sub submitButton_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) employeeDataSource.SubmitChanges() End Sub
4. Run the application and click the Employee List link. You can now modify any editable field by clicking on the pencil icon on the DataForm to put the form in edit mode. Make changes to the Employee data and click OK when done with the edits. Click the Submit button to save the data. Changes are saved to the database on the server only when you click the ‘Submit’ button.
Adding Custom Methods to a Domain Service
1. In the HRApp.Web server project, open OrganizationService.cs/vb and add a custom method called ‘ApproveSabbatical’.
Visual BasicC#
'VB Public Sub ApproveSabbatical(ByVal current As Employee) Me.ObjectContext.Employees.AttachAsModified(current) current.CurrentFlag = False End Sub
2. On the Build menu, select Build Solution.
3. In the client project, open EmployeeList.xaml.
4. Add an ‘Approve Sabbatical’ button by adding the following XAML code (in bold):
XAML
<!-- XAML --> <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,12,0,0"> <Button x:Name="submitButton" Width="75" Height="23" Content="Save" Margin="4,0,0,0" Click="submitButton_Click"/> <Button x:Name="approveSabbatical" Width="115" Height="23" Content="Approve Sabbatical" Margin="4,0,0,0" Click="approveSabbatical_Click"/> </StackPanel>
5. Open EmployeeList.xaml.cs/vb.
6. Handle the button click event and call the ApproveSabbatical method by adding the following code:
Visual BasicC#
'VB Private Sub approveSabbatical_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Dim luckyEmployee As Employee luckyEmployee = dataGrid1.SelectedItem luckyEmployee.ApproveSabbatical() employeeDataSource.SubmitChanges() End Sub
Validation
Basic Validation
The DataForm control has the ability to show validation errors that come from the Data Access Layer (DAL). For example, enter a non-integer value in the Vacation Hours field in the detail view and a validation error is displayed.
Checking the Generate associated classes for metadata option in the New Domain Service Class wizard caused a file named OrganizationService.metadata.cs/vb to be generated automatically in the HRApp.Web project. You will add validation attributes to this file that will be enforced across application tiers.
1. In the HRApp.web project, open OrganizationService.metadata.cs/vb.
2. Add the following attributes to Gender and Vacation Hours:
Visual BasicC#
'VB <Required()> _ Public Gender As String <Range(0, 70)> _ Public VacationHours As Short
3. On the Build menu, select Build Solution.
4. Run the application.
5. Click on the Employee List link. Select an employee and click the pencil icon in the upper right hand corner of the data form to enable editing. Enter a value into the Vacation Hours field that is not within the valid range (0-70). You will see a validation error. Also note that the Gender field is required and cannot be left empty.
Custom Validation
1. In Solution Explorer, right-click the HRApp.Web project, select Add, and then select New Item. The Add New Item dialog box is displayed.2. In the Categories pane, select Code, and in the Templates pane, select Code File. Name the new item ‘OrganizationService.shared.cs’ or ‘OrganizationService.shared.vb’ and click Add.
3. Add the following block of code to the file:
Visual BasicC#
'VB Imports System Imports System.ComponentModel.DataAnnotations Public Module GenderValidator Public Function IsGenderValid(ByVal gender As String, ByVal context As ValidationContext) As ValidationResult If gender = "M" OrElse gender = "m" OrElse gender = "F" OrElse gender = "f" Then Return ValidationResult.Success Else Return New ValidationResult("The Gender field only has two valid values 'M'/'F'", New String() {"Gender"}) End If End Function End Module
Note: Since the file ends with ‘.shared.cs/vb’, the same code will be available to be consumed on the client as well as the server. We will be using this to run the same validation rule at both locations. (After you rebuild the solution, look in the hidden Generated_Code folder on the client, and you will see the OrganizationService.shared.cs/vb file present there as well and being compiled as part of the server project.)
4. Open OrganizationService.metadata.cs/vb.
5. Add a new custom validation attribute to the gender property by adding the following code (in bold).
Visual BasicC#
'VB <Required()> _ <CustomValidation(GetType(GenderValidator), "IsGenderValid")> _ Public Gender As String
6. On the Build menu, select Build Solution.
7. Run the application.
8. Click on the Employee List link. Enter a value for the Gender field that is not ’M’ or ’F’.
Add a new record
You will now create a user interface to allow the addition of new employee records to the database. The validation rules that you added in the previous sections will automatically be applied in the new user interface.1. In Solution Explorer, right-click the HRApp project, select Add, and then select New Item. The Add New Item dialog box is displayed.
2. In the Categories pane, select Silverlight, and in the Templates pane, select Silverlight Child Window. Name the new item ‘EmployeeRegistrationWindow.xaml’ and click Add.
3. Open EmployeeRegistrationWindow.xaml.cs/vb and add the following using/Imports statement:
JavaScriptC#
'VB Imports System.Windows.Controls Imports System.Windows
4. Add the following property in the code:
Visual BasicC#
'VB Public Property NewEmployee As Employee
5. Open EmployeeRegistrationWindow.xaml.
6. Hide the ChildWindow Close button by adding the XAML in bold below.
<controls:ChildWindow x:Class="HRApp.EmployeeRegistrationWindow"
…
Width="400" Height="300"
Title="EmployeeRegistrationWindow" HasCloseButton="False">
7. As we did for the Details view, here too we will be using the DataForm Control from the SL 3 Toolkit. The Silverlight Business Application Project Template carries the System.Windows.Controls.Data.DataForm.Toolkit binary in the ‘Libs’ Folder, hence our Project already has access to the DataForm Control.
Add the following namespace declaration to EmployeeRegistrationWindow.xaml:
XAML
<!-- XAML -->
xmlns:dataForm="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.DataForm.Toolkit"
8. Add the DataForm from to the EmployeeRegistrationWindow.xaml just above the ‘Cancel’ button using the XAML Code below.
<dataForm:DataForm x:Name="addEmployeeDataForm" AutoGenerateFields="False" AutoCommit="True" AutoEdit="True" CommandButtonsVisibility="None">
<dataForm:DataForm.EditTemplate>
<DataTemplate>
<StackPanel>
<dataForm:DataField Label="Login ID">
<TextBox Text="{Binding LoginID, Mode=TwoWay}" />
</dataForm:DataField>
<dataForm:DataField Label="National ID">
<TextBox Text="{Binding NationalIDNumber, Mode=TwoWay}" />
</dataForm:DataField>
<dataForm:DataField Label="Title">
<TextBox Text="{Binding Title, Mode=TwoWay}" />
</dataForm:DataField>
<dataForm:DataField Label="Marital Status">
<TextBox Text="{Binding MaritalStatus, Mode=TwoWay}" />
</dataForm:DataField>
<dataForm:DataField Label="Gender">
<TextBox Text="{Binding Gender, Mode=TwoWay,NotifyOnValidationError=True, ValidatesOnExceptions=True }" />
</dataForm:DataField>
<dataForm:DataField Label="Salaried">
<CheckBox IsChecked="{Binding SalariedFlag, Mode=TwoWay,NotifyOnValidationError=True, ValidatesOnExceptions=True }" />
</dataForm:DataField>
<dataForm:DataField Label="Active">
<CheckBox IsChecked="{Binding CurrentFlag, Mode=TwoWay,NotifyOnValidationError=True, ValidatesOnExceptions=True }" />
</dataForm:DataField>
</StackPanel>
</DataTemplate>
</dataForm:DataForm.EditTemplate>
</dataForm:DataForm>
9. Open EmployeeRegistrationWindow.xaml.cs/vb and add the following code (in bold):
JavaScriptC#
'VB Partial Public Class EmployeeRegistrationWindow Inherits ChildWindow Public Sub New() InitializeComponent() NewEmployee = New Employee addEmployeeDataForm.CurrentItem = NewEmployee addEmployeeDataForm.BeginEdit() End Sub Public Property NewEmployee As Employee Private Sub OKButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs) Handles OKButton.Click Me.addEmployeeDataForm.CommitEdit() Me.DialogResult = True End Sub Private Sub CancelButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs) Handles CancelButton.Click NewEmployee = Nothing addEmployeeDataForm.CancelEdit() Me.DialogResult = False End Sub End Class
10. Open EmployeeList.xaml.
11. Add a button called ‘addNewEmployee’ between the DataPager and the DataForm by adding the following XAML code.
XAML
<!-- XAML --> <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,12,0,0"> <Button x:Name="addNewEmployee" Width="90" Height="23" Content="Add Employee" Margin="4,0,0,0" Click="addNewEmployee_Click"/> </StackPanel>
12. Open EmployeeList.xaml.cs/vb.
13. Handle the button click event to show the EmployeeRegistrationWindow by adding the following code:
Visual BasicC#
'VB Private Sub addNewEmployee_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Dim addEmp As New EmployeeRegistrationWindow() AddHandler addEmp.Closed, AddressOf addEmp_Closed addEmp.Show() End Sub
14. Add the following method to handle the closed event for the EmployeeRegistrationWindow:
Visual BasicC#
'VB Private Sub addEmp_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Dim emp As EmployeeRegistrationWindow = sender If Not emp.NewEmployee Is Nothing Then Dim _OrganizationContext As OrganizationContext = employeeDataSource.DomainContext _OrganizationContext.Employees.Add(emp.NewEmployee) employeeDataSource.SubmitChanges() End If End Sub
15. In the HRApp.web project, open OrganizationService.cs/vb.
16. Add the following code (in bold) to the InsertEmployee method:
Visual BasicC#
'VB Public Sub InsertEmployee(ByVal employee As Employee) 'Modify the employee data to meet the database constraints. employee.HireDate = DateTime.Now employee.ModifiedDate = DateTime.Now employee.VacationHours = 0 employee.SickLeaveHours = 0 employee.rowguid = Guid.NewGuid() employee.ContactID = 1001 employee.BirthDate = New DateTime(1967, 3, 18) If ((employee.EntityState = EntityState.Detached) = False) Then Me.ObjectContext.ObjectStateManager.ChangeObjectState(employee, EntityState.Added) Else Me.ObjectContext.Employees.AddObject(employee) End If End Sub
17. Run the application.
18. Click the employee list link. You can now add new employees to the database by clicking the ‘Add Employee’ button. To ensure that the new employee appears in the list, mark the employee as Salaried. Earlier you modified the application to only load salaried employees.
Authentication
Authentication
1. Open OrganizationService.cs/vb2. Add the RequiresAuthentication attribute on the ApproveSabbatical method by adding the following code (in bold).
This ensures that only authenticated users can now call the ApproveSabbatical method on the server. If an anonymous user clicks on the ApproveSabbatical button, the CurrentFlag for the selected employee will not be cleared.
Visual BasicC#
'VB <RequiresAuthentication()> _ Public Sub ApproveSabbatical(ByVal current As Employee) Me.ObjectContext.Employees.AttachAsModified(current) current.CurrentFlag = False End Sub
3. In the client project, open EmployeeList.xaml.cs/vb.
4. Add the following using/Imports statements:
Visual BasicC#
'VB Imports System.ServiceModel.DomainServices.Client.ApplicationServices
5. Modify the approveSabbatical_Click method with the following code: This will allow anonymous users to get authenticated and then approve a sabbatical. If the users do not have an existing user account they can create one using the Registration Dialog.
Visual BasicC#
'VB Private Sub approveSabbatical_Click(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) If WebContext.Current.User IsNot Nothing AndAlso WebContext.Current.User.IsAuthenticated Then Dim luckyEmployee As Employee = dataGrid1.SelectedItem luckyEmployee.ApproveSabbatical() employeeDataSource.SubmitChanges() Else AddHandler WebContext.Current.Authentication.LoggedIn, AddressOf Current_LoginCompleted Dim newWindow As New LoginRegistrationWindow newWindow.Show() End If End Sub Private Sub Current_LoginCompleted(ByVal sender As Object, ByVal e As AuthenticationEventArgs) Dim luckyEmployee As Employee = dataGrid1.SelectedItem luckyEmployee.ApproveSabbatical() employeeDataSource.SubmitChanges() RemoveHandler WebContext.Current.Authentication.LoggedIn, AddressOf Current_LoginCompleted End Sub
6. Run the application and click the employee list link.
7. Select an employee record and click the ‘Approve Sabbatical’ button. You are redirected to the login page.
8. Enter your credentials to login, or click register.
After login is completed, you are redirected to the Employee List page and the employee’s sabbatical is approved.
Completed Projects
http://go.microsoft.com/fwlink/?LinkId=145481
WCF RIA Services
Microsoft WCF RIA Services simplifies the traditional n-tier application pattern by bringing together the ASP.NET and Silverlight platforms using WCF. The RIA Services provides a prescriptive pattern to write application logic that runs on the mid-tier and controls access to data for queries, changes and custom operations. It also provides end-to-end support for common tasks such as data validation, authentication and roles by integrating with Silverlight components on the client and ASP.NET on the mid-tier. It includes rich tooling for integrating client and mid-tier projects and for building rich UI through the simplicity of drag-drop support.For the latest information please click here .
RIA Services Home Page with links to the download site, MSDN docs, talks ... can be found here.
For help porting applications to the latest bits - Breaking Changes from Beta(PDC 09) to RTW
The document above also insludes guidance on updating VS 2008/.NET 3.5 RIA Services applications to VS 2010/.NET 4
Please use the forums to provide feedback or post questions.
