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POMany to Many (Students , classes example) Datagrid xaml binding
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  1. POMany to Many (Students , classes example) Datagrid xaml binding
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    copied!<p>I have a WPF / entity framework application, my model have student , class entities there is a many to many association/relation between student and class (student can have many classes and class have many students )</p> <p>student [ Id ,Name , Classes(Navigation property) ] classes [ Id ,Title, Students(Navigation property ] </p> <p>in this case the entity framework don't show the join/relation table.</p> <p>i have a 2 DataGirds as master details, student grid is the master and classes is details</p> <p>how can i set the binding to classes gird (the details gird) so i can add and remove classes to the selected student?</p> <p>what i want is to select a student from the master grid and add or remove his classes</p> <p>this is my classes gird </p> <pre><code>&lt;DataGrid x:Name="classesDataGrid" AutoGenerateColumns="False" EnableRowVirtualization="True" Height="200" ItemsSource="{Binding Source={StaticResource studentClassesViewSource}}" RowDetailsVisibilityMode="VisibleWhenSelected" Width="380"&gt; &lt;DataGrid.Columns&gt; &lt;DataGridComboBoxColumn Header="Class Name From Combo" Width="*" ItemsSource="{Binding Source={StaticResource classViewSource}}" DisplayMemberPath="Name" SelectedItemBinding="{Binding Students}" /&gt; &lt;!--&lt;DataGridTextColumn x:Name="durationColumn" Binding="{Binding Duration}" Header="Duration" Width="SizeToHeader" /&gt;--&gt; &lt;/DataGrid.Columns&gt; </code></pre> <p>This scenario works fine when the relation is one to many but i couldn't make it work for many to many relations .</p> <p>More on this post <a href="http://social.msdn.microsoft.com/Forums/vstudio/en-US/74ca2429-cb22-4b24-ae22-01a842b7d8c2/many-to-many-students-classes-example-datagridcomboboxcolumn-binding-problem" rel="nofollow">here</a></p>
 

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