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A Sample Silverlight 4 Application Using MEF, MVVM, and WCF RIA Services - Part 1

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7 Jul 2011CPOL9 min read 2.1M   30.9K   298  
Part 1 of a series describing the creation of a Silverlight business application using MEF, MVVM Light, and WCF RIA Services.
 
<UserControl x:Class="IssueVision.Client.IssueEditor"
    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:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
    xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.SL4"
    xmlns:dat="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input"
    xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
    xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
    mc:Ignorable="d" d:DesignHeight="725" d:DesignWidth="978">
    <Grid x:Name="LayoutRoot">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="326*" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="295*" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="600*" />
            <ColumnDefinition Width="94*" />
        </Grid.ColumnDefinitions>
        <TextBlock Grid.Row="0" Grid.Column="0"
                   HorizontalAlignment="Stretch" VerticalAlignment="Center"
                   Margin="4" Text="Issue Title" />
        <TextBox x:Name="textBox_IssueTitle" Grid.Row="0" Grid.Column="1"
                 VerticalAlignment="Center" 
                 Text="{Binding Path=CurrentIssue.Title, Mode=TwoWay,
                        ValidatesOnExceptions=True, NotifyOnValidationError=True}"/>
        <Border Grid.Row="0" Grid.Column="2"
                BorderBrush="Silver" BorderThickness="1"
                CornerRadius="3" Margin="5">
            <StackPanel>
                <TextBlock HorizontalAlignment="Center" Text="Issue ID" />
                <TextBlock HorizontalAlignment="Center"
                           Text="{Binding Path=CurrentIssue.IssueID, Mode=OneWay, TargetNullValue='None',
                                  ValidatesOnNotifyDataErrors=False}" />
            </StackPanel>
        </Border>
        <ScrollViewer Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="3">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="34*" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto" />
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="Auto" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>
                <TextBlock Grid.Row="0" Grid.Column="0"
                           FontWeight="Bold" Margin="4" 
                           Text="Issue Info" />
                <TextBlock Grid.Row="1" Grid.Column="0"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Type" />
                <ComboBox x:Name="comboBox_Type" Grid.Row="1" Grid.Column="1" 
                          Margin="4" MinHeight="25"
                          ItemsSource="{Binding Path=IssueTypeEntries}"
                          SelectedItem="{Binding Path=CurrentIssue.IssueType, Mode=TwoWay,
                                                    ValidatesOnNotifyDataErrors=False}">
                    <ComboBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel>
                                <TextBlock Text="{Binding Path=Name, ValidatesOnNotifyDataErrors=False}" />
                            </StackPanel>
                        </DataTemplate>
                    </ComboBox.ItemTemplate>
                </ComboBox>
                <TextBlock Grid.Row="2" Grid.Column="0"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Priority" />
                <ComboBox x:Name="comboBox_Priority" Grid.Row="2" Grid.Column="1" 
                          Margin="4" MinHeight="25"
                          ItemsSource="{Binding Path=PriorityEntries}"
                          SelectedItem="{Binding Path=CurrentIssue.Priority, Mode=TwoWay,
                                         ValidatesOnNotifyDataErrors=False}"/>
                <TextBlock Grid.Row="3" Grid.Column="0"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Severity" />
                <ComboBox x:Name="comboBox_Severity" Grid.Row="3" Grid.Column="1"
                          Margin="4" MinHeight="25"
                          ItemsSource="{Binding Path=SeverityEntries}"
                          SelectedItem="{Binding Path=CurrentIssue.Severity, Mode=TwoWay,
                                         ValidatesOnNotifyDataErrors=False}"/>
                <TextBlock Grid.Row="4" Grid.Column="0"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Status" />
                <ComboBox x:Name="comboBox_Status" Grid.Row="4" Grid.Column="1"
                          Margin="4" MinHeight="25" 
                          ItemsSource="{Binding Path=StatusEntries}"
                          SelectedItem="{Binding Path=CurrentIssue.Status, Mode=TwoWay,
                                                    ValidatesOnNotifyDataErrors=False}">
                    <ComboBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel>
                                <TextBlock Text="{Binding Path=Name, ValidatesOnNotifyDataErrors=False}" />
                            </StackPanel>
                        </DataTemplate>
                    </ComboBox.ItemTemplate>
                </ComboBox>
                <TextBlock Grid.Row="5" Grid.Column="0"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Substatus" />
                <ComboBox x:Name="comboBox_Substatus" Grid.Row="5" Grid.Column="1"
                      Margin="4" MinHeight="25" 
                      ItemsSource="{Binding Path=SubstatusEntriesWithNull}"
                      DisplayMemberPath="DisplayName"
                      SelectedValuePath="SubStatusID2"
                      SelectedValue="{Binding Path=CurrentIssue.SubStatusID, Mode=TwoWay,
                                      ValidatesOnNotifyDataErrors=False}"/>
                <TextBlock Grid.Row="6" Grid.Column="0"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Platform" />
                <data:DataGrid x:Name="dataGrid_Platform" Grid.Row="6" Grid.Column="1" Grid.RowSpan="3"
                           VerticalAlignment="Top" Height="150"
                           Margin="4" IsReadOnly="True"
                           ColumnWidth="Auto" AutoGenerateColumns="False" 
                           SelectionMode="Single"
                           ItemsSource="{Binding Path=PlatformEntries}"
                           SelectedItem="{Binding Path=CurrentIssue.Platform, Mode=TwoWay,
                                          ValidatesOnNotifyDataErrors=False}">
                    <data:DataGrid.Columns>
                        <data:DataGridTemplateColumn Header="Operating System" Width="Auto" SortMemberPath="OSVersion">
                            <data:DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
                                        <TextBlock Text="{Binding Path=OS, ValidatesOnNotifyDataErrors=False}" />
                                        <TextBlock Text=" " />
                                        <TextBlock Text="{Binding Path=OSVersion, ValidatesOnNotifyDataErrors=False}" />
                                    </StackPanel>
                                </DataTemplate>
                            </data:DataGridTemplateColumn.CellTemplate>
                        </data:DataGridTemplateColumn>
                        <data:DataGridTemplateColumn Header="Browser" Width="Auto" SortMemberPath="BrowserVersion">
                            <data:DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
                                        <TextBlock Text="{Binding Path=Browser, ValidatesOnNotifyDataErrors=False}" />
                                        <TextBlock Text=" " />
                                        <TextBlock Text="{Binding Path=BrowserVersion, ValidatesOnNotifyDataErrors=False}" />
                                    </StackPanel>
                                </DataTemplate>
                            </data:DataGridTemplateColumn.CellTemplate>
                        </data:DataGridTemplateColumn>
                        <data:DataGridTextColumn Header="Language" Width="*" Binding="{Binding Path=Language, ValidatesOnNotifyDataErrors=False}" />
                    </data:DataGrid.Columns>
                </data:DataGrid>
                <TextBlock Grid.Row="1" Grid.Column="2"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Opened"/>
                <TextBox Grid.Row="1" Grid.Column="3" 
                         Margin="4" IsReadOnly="True"
                         Text="{Binding Path=CurrentIssue.OpenedDate, Mode=OneWay, StringFormat=\{0:F\},
                                ValidatesOnNotifyDataErrors=False}"/>
                <TextBlock Grid.Row="2" Grid.Column="2"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Opened By" />
                <TextBox Grid.Row="2" Grid.Column="3"
                          Margin="4" MinHeight="25" IsReadOnly="True"
                         Text="{Binding Path=CurrentIssue.OpenedByID, Mode=OneWay,
                                ValidatesOnExceptions=True, NotifyOnValidationError=True}"/>
                <TextBlock Grid.Row="3" Grid.Column="2"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Changed" />
                <TextBox Grid.Row="3" Grid.Column="3"
                         Margin="4" IsReadOnly="True" 
                         Text="{Binding Path=CurrentIssue.LastChange, StringFormat=\{0:F\},
                                ValidatesOnNotifyDataErrors=False}" />
                <TextBlock Grid.Row="4" Grid.Column="2"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Changed By" />
                <TextBox Grid.Row="4" Grid.Column="3"
                     Margin="4" MinHeight="25" IsReadOnly="True"
                     Text="{Binding Path=CurrentIssue.ChangedByID, Mode=OneWay,
                            ValidatesOnExceptions=True, NotifyOnValidationError=True}"/>
                <TextBlock Grid.Row="5" Grid.Column="2"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Assigned To" />
                <ComboBox x:Name="comboBox_AssignedTo" Grid.Row="5" Grid.Column="3"
                      Margin="4" MinHeight="25" 
                      ItemsSource="{Binding Path=UserEntriesWithNull}"
                      DisplayMemberPath="DisplayName"
                      SelectedValuePath="Name"
                      SelectedValue="{Binding Path=CurrentIssue.AssignedToID, Mode=TwoWay,
                                      ValidatesOnExceptions=True, NotifyOnValidationError=True}" />
                <TextBlock Grid.Row="6" Grid.Column="2"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Resolution" />
                <ComboBox x:Name="comboBox_Resolution" Grid.Row="6" Grid.Column="3"
                          Margin="4" MinHeight="25" 
                          ItemsSource="{Binding Path=ResolutionEntriesWithNull}"
                          DisplayMemberPath="DisplayName"
                          SelectedValuePath="ResolutionID2"
                          SelectedValue="{Binding Path=CurrentIssue.ResolutionID, Mode=TwoWay,
                                          ValidatesOnExceptions=True, NotifyOnValidationError=True}" />
                <TextBlock Grid.Row="7" Grid.Column="2"
                           VerticalAlignment="Center" Margin="4" 
                           Text="Resolved By" />
                <TextBox Grid.Row="7" Grid.Column="3"
                         Margin="4" MinHeight="25" IsReadOnly="True"
                         Text="{Binding Path=CurrentIssue.ResolvedByID, Mode=OneWay,
                                ValidatesOnExceptions=True, NotifyOnValidationError=True}"/>
            </Grid>
        </ScrollViewer>
        <controls:GridSplitter Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="3"
                               HorizontalAlignment="Stretch" />
        <controls:TabControl Grid.Row="3" Grid.Column="0" Grid.ColumnSpan="3">
            <controls:TabItem Header="Details">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto" />
                        <RowDefinition Height="164*" />
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="*" />
                    </Grid.ColumnDefinitions>
                    <TextBlock Grid.Row="0" Grid.Column="0"
                               Text="Description" />
                    <TextBox x:Name="textBox_Description" Grid.Row="1" Grid.Column="0"
                             AcceptsReturn="True" VerticalScrollBarVisibility="Auto" TextWrapping="Wrap"
                             Text="{Binding Path=CurrentIssue.Description, Mode=TwoWay, ValidatesOnNotifyDataErrors=False}" />
                    <controls:GridSplitter Grid.Row="0" Grid.Column="1"  Grid.RowSpan="2"
                                           HorizontalAlignment="Stretch"/>
                    <TextBlock Grid.Row="0" Grid.Column="2"
                               Text="Repro Steps" />
                    <TextBox x:Name="textBox_ReproSteps" Grid.Row="1" Grid.Column="2"
                             AcceptsReturn="True" VerticalScrollBarVisibility="Auto" TextWrapping="Wrap" 
                             Text="{Binding Path=CurrentIssue.ReproSteps, Mode=TwoWay, ValidatesOnNotifyDataErrors=False}" />
                </Grid>
            </controls:TabItem>
            <controls:TabItem Header="Files">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="659*" />
                        <ColumnDefinition Width="129*" />
                    </Grid.ColumnDefinitions>
                    <Grid Grid.Row="0" Grid.Column="0">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="*"/>
                        </Grid.RowDefinitions>
                        <TextBlock>Drop files here:</TextBlock>
                        <ListBox x:Name="listBox_Files" Grid.Row="1" Grid.Column="0"
                                 AllowDrop="True"
                                 ItemsSource="{Binding Path=CurrentIssue.Files, ValidatesOnNotifyDataErrors=False}">
                            <ListBox.ItemTemplate>
                                <DataTemplate>
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="{Binding Path=FileName, ValidatesOnNotifyDataErrors=False}" />
                                        <TextBlock Text="{Binding Path=Data.Length, StringFormat=' - \{0:F0\} bytes',
                                                          ValidatesOnNotifyDataErrors=False}" />
                                    </StackPanel>
                                </DataTemplate>
                            </ListBox.ItemTemplate>
                            <i:Interaction.Triggers>
                                <i:EventTrigger EventName="Drop">
                                    <cmd:EventToCommand PassEventArgsToCommand="True"
                                                    Command="{Binding Path=HandleDropCommand, Mode=OneWay}" />
                                </i:EventTrigger>
                            </i:Interaction.Triggers>
                        </ListBox>
                    </Grid>
                    <Button x:Name="button_Add" Grid.Row="0" Grid.Column="1"
                            HorizontalAlignment="Left" VerticalAlignment="Top"
                            Height="23" Width="117" 
                            Margin="6,0,0,0" 
                            Content="Add"
                            Command="{Binding Path=AddFileCommand}" />
                    <Button x:Name="button_Remove" Grid.Row="0" Grid.Column="1"
                            HorizontalAlignment="Left" VerticalAlignment="Top"
                            Height="23" Width="117"
                            Margin="6,29,0,0" 
                            Content="Remove" 
                            Command="{Binding Path=RemoveFileCommand}"
                            CommandParameter="{Binding SelectedItem, ElementName=listBox_Files, ValidatesOnNotifyDataErrors=False}" />
                    <Button x:Name="button_Save" Grid.Row="0" Grid.Column="1"
                            HorizontalAlignment="Left" VerticalAlignment="Top"
                            Height="23" Width="117"
                            Margin="6,58,0,0" 
                            Content="Save to disk" 
                            Command="{Binding Path=SaveToDiskCommand}"
                            CommandParameter="{Binding SelectedItem, ElementName=listBox_Files, ValidatesOnNotifyDataErrors=False}" />
                </Grid>
            </controls:TabItem>
            <controls:TabItem Header="Attributes">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="664*" />
                        <ColumnDefinition Width="124*" />
                    </Grid.ColumnDefinitions>
                    <data:DataGrid x:Name="dataGrid_Attributes" Grid.Row="0" Grid.Column="0"
                                   AutoGenerateColumns="False" SelectionMode="Single"
                                   ItemsSource="{Binding Path=CurrentIssue.Attributes, ValidatesOnNotifyDataErrors=False}">
                        <data:DataGrid.Columns>
                            <data:DataGridTextColumn Header="Key" Binding="{Binding Path=AttributeName, ValidatesOnNotifyDataErrors=False}" Width="*" />
                            <data:DataGridTextColumn Header="Value" Binding="{Binding Path=Value, ValidatesOnNotifyDataErrors=False}" Width="*" />
                        </data:DataGrid.Columns>
                    </data:DataGrid>
                    <Button x:Name="button_AddAttribute" Grid.Row="0" Grid.Column="1"
                            HorizontalAlignment="Left" VerticalAlignment="Top" 
                            Height="23" Width="112"
                            Margin="6,0,0,0" Content="Add" 
                            Command="{Binding Path=AddAttributeCommand}" />
                    <Button x:Name="button_RemoveAttribute" Grid.Row="0" Grid.Column="1" 
                            HorizontalAlignment="Left" VerticalAlignment="Top" 
                            Height="23" Width="112"
                            Margin="6,29,0,0" Content="Remove"
                            Command="{Binding Path=RemoveAttributeCommand}"
                            CommandParameter="{Binding SelectedItem, ElementName=dataGrid_Attributes, ValidatesOnNotifyDataErrors=False}" />
                </Grid>
            </controls:TabItem>
        </controls:TabControl>
        <dat:ValidationSummary Grid.Row="4" Grid.Column="0"  Grid.ColumnSpan="3"
                               Target="{Binding ElementName=LayoutRoot}" />
    </Grid>
</UserControl>

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Weidong Shen
Software Developer (Senior)
United States United States
Weidong has been an information system professional since 1990. He has a Master's degree in Computer Science, and is currently a MCSD .NET

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Posted 19 May 2010

Article Copyright 2010 by Weidong Shen
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