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PORelated table declarative databinding in wpf/xaml
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  1. PORelated table declarative databinding in wpf/xaml
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    copied!<p>I have been working through a very small-scale WPF project in order to familiarize myself with it while I read Nathan's book. I am attempting to do declarative binding on a single window with multiple tables from the same dataset. The schema (names have been changed to protect the innocent) is: tblMany2--tblOne--tblMany1</p> <p>XAML is below, but in short:</p> <ul> <li>I set the datacontext in the windows _loaded handler. I have tried both to the dataset and to the table which is the primary table conceptually (tblMany1).</li> <li>I set the ItemSource on a combo box to tblMany1.</li> <li>I set the ItemSource on a second combo box to the foreign key data relation (originally it was a tbo, but I've been working for a while).</li> <li>The idea is to control the second combo box (and other controls) by changing the first.</li> <li>The result so far is a blank entry in the second combobox with a debug output saying cannot find the property of whichever object I've set the ItemsSource to.</li> </ul> <p><strong>XAML:</strong></p> <pre><code>&lt;Window x:Class="MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:sys="clr-namespace;system;assembly=mscorlib" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:my="clr-namespace:MyProject" xmlns:dx="clr-namespace:System.Diagnostics;assembly=WindowsBase" Height="500" Width="700" d:DesignHeight="350" d:DesignWidth="525" SizeToContent="WidthAndHeight"&gt; &lt;Window.Resources&gt; &lt;!--Data--&gt; &lt;!--Styles--&gt; &lt;Style x:Key="buttonStyle"&gt; &lt;Setter Property="Button.Width" Value="85" /&gt; &lt;Setter Property="Button.Height" Value="30" /&gt; &lt;/Style&gt; &lt;Style x:Key="chkImageStyle" TargetType="Image"&gt; &lt;Setter Property="Image.Height" Value="25" /&gt; &lt;Setter Property="Image.Width" Value="30" /&gt; &lt;Setter Property="Image.Margin" Value="100,30,0,0" /&gt; &lt;Setter Property="Image.Stretch" Value="Fill" /&gt; &lt;Setter Property="Image.VerticalAlignment" Value="Top" /&gt; &lt;Setter Property="Grid.Column" Value="1" /&gt; &lt;Setter Property="Image.Source" Value="checkmark.jpg" /&gt; &lt;Setter Property="Image.Visibility" Value="hidden" /&gt; &lt;/Style&gt; &lt;!--Data Tempaltes--&gt; &lt;DataTemplate x:Key="tblMany1Date"&gt; &lt;TextBlock Text="{Binding Path=tblMany1Date, StringFormat=d,dx:PresentationTraceSources.TraceLevel=High}" /&gt; &lt;/DataTemplate&gt; &lt;DataTemplate x:Key="tblOneLink"&gt; &lt;TextBlock HorizontalAlignment="Center"&gt; &lt;Hyperlink NavigateUri="{Binding Path=tblOne.Link}"&gt; &lt;Run Text="{Binding Path=tblOne.Name}" /&gt; &lt;/Hyperlink&gt; &lt;/TextBlock&gt; &lt;/DataTemplate&gt; &lt;/Window.Resources&gt; &lt;Viewbox Stretch="Uniform" Height="500" Width="750"&gt; &lt;!-- Main Dockpanel--&gt; &lt;DockPanel Name="DockPanel1"&gt; &lt;!-- NavPane --&gt; &lt;StackPanel Height="315" Background ="LightBlue" DockPanel.Dock="Left" Name="StackPanel1" Width="135"&gt; &lt;Button Margin="5" Content="New" Name="btnNewOne" Style="{StaticResource buttonStyle}"/&gt; &lt;Label Margin="0" Content="ManyDate:" Name="lblDate" /&gt; &lt;!--Primary Control--&gt; &lt;ComboBox Margin ="0" IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding Path=tblMany1}" ItemTemplate="{StaticResource tblMany1Date}" Height="23" Name="cboDate" Width="120" ForceCursor="False" AllowDrop="False" /&gt; &lt;TextBlock Margin="-5" Visibility="Hidden"/&gt; &lt;Label Margin="0" Content="OneName:" Name="lblOneName" /&gt; &lt;ComboBox Margin="0" ItemsSource="{Binding FK_tblMany1_tblOne}" ItemTemplate="{StaticResource tblOneLink}" Name="cboOne" /&gt; &lt;/StackPanel&gt; &lt;/DockPanel&gt; &lt;/Viewbox&gt; </code></pre> <p></p>
 

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