I can't for the love of god sort this out. I did see this answer: How to Bind data to DataGridComboBoxColumn in DataGrid using MVVM and many more for that matter but I am not sure what I am doing wrong. Here's my thinking. I have a DataGrid that is bound to Views collection. Each row is represented by a object of class ViewWrapper ViewWrapper has a property called ViewTemplate that is of type ViewWrapper. So basically view wrapper can store another view wrapper inside of it. Now, I want to hook up a ComboBox to a list of ViewWrapper objects stored in variable called ViewTemplates. That's available on a ViewModel. It holds all possible view wrappers that a View Template property can be potentially set to. Now, I want to bind the SelectedItem of the ComboBox to ViewWrapper.ViewTemplate from the DataGrid row. I can't get this thing to work.
Here's my setup:
XAML:
<UserControl x:Class="GrimshawRibbon.Revit.Views.ViewManager.ViewManagerView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:local="clr-namespace:GrimshawRibbon.Revit.Views.ViewManager"
xmlns:ex="clr-namespace:GrimshawRibbon.Revit.Wpf.Extensions"
xmlns:controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Platform"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="500">
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colors.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Blue.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
<ResourceDictionary Source="pack://application:,,,/GrimshawRibbon;component/Revit/Wpf/Style/GrimshawTheme.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</UserControl.Resources>
<Grid>
<ex:DataGridEx x:Name="dgViews"
Style="{StaticResource AzureDataGrid}"
Margin="10"
AutoGenerateColumns="False"
ItemsSource="{Binding Views, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
CanUserAddRows="False"
IsReadOnly="False"
SelectionMode="Extended"
SelectionUnit="FullRow"
SelectedItemsList="{Binding SelectedViews, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
<i:Interaction.Triggers>
<i:EventTrigger EventName="CellEditEnding">
<cmd:EventToCommand PassEventArgsToCommand="True" Command="{Binding CellEditEndingCommand}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
<DataGrid.Columns>
<DataGridTextColumn Header="Name" Binding="{Binding Name, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="*"/>
<DataGridTextColumn Header="ViewType" Binding="{Binding ViewType}" Width="100" IsReadOnly="True"/>
<DataGridTextColumn Header="ViewGroup" Binding="{Binding ViewGroup, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="120" IsReadOnly="False"/>
<DataGridTextColumn Header="ViewSubGroup" Binding="{Binding ViewSubGroup, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="120" IsReadOnly="False"/>
<DataGridCheckBoxColumn ElementStyle="{DynamicResource MetroDataGridCheckBox}"
EditingElementStyle="{DynamicResource MetroDataGridCheckBox}"
Header="OnSheet"
Binding="{Binding OnSheet, Mode=TwoWay}"
IsReadOnly="True"
Width="80">
</DataGridCheckBoxColumn>
<DataGridComboBoxColumn Header="ViewTemplate" Width="150" SelectedItemBinding="{Binding WhatDoISetThisTo?}">
<DataGridComboBoxColumn.ElementStyle>
<Style TargetType="ComboBox">
<Setter Property="ItemsSource" Value="{Binding ViewTemplates}"/>
<Setter Property="IsReadOnly" Value="True"/>
</Style>
</DataGridComboBoxColumn.ElementStyle>
<DataGridComboBoxColumn.EditingElementStyle>
<Style TargetType="ComboBox">
<Setter Property="ItemsSource" Value="{Binding ViewTemplates}"/>
</Style>
</DataGridComboBoxColumn.EditingElementStyle>
</DataGridComboBoxColumn>
</DataGrid.Columns>
</ex:DataGridEx>
</Grid>
</UserControl>
ViewModel:
public class ViewManagerViewModel : ViewModelBaseEx
{
public ViewManagerModel Model;
public ObservableCollection<ViewWrapper> Views { get; private set; }
public ObservableCollection<ViewWrapper> ViewTemplates { get; private set; }
public IList SelectedViews { get; set; }
public RelayCommand<DataGridCellEditEndingEventArgs> CellEditEndingCommand { get; set; }
public ViewManagerViewModel(Document doc)
{
Model = new ViewManagerModel(doc);
Views = Model.CollectViews();
ViewTemplates = Model.CollectViewTemplates();
CellEditEndingCommand = new RelayCommand<DataGridCellEditEndingEventArgs>(args => OnCellEditEnding(args));
}
/// <summary>
/// Logic for handling cell editing events.
/// </summary>
/// <param name="e">DataGrid Row object.</param>
private void OnCellEditEnding(DataGridCellEditEndingEventArgs e)
{
var wrapper = e.Row.Item as ViewWrapper;
switch (e.Column.SortMemberPath)
{
case "Name":
Model.ChangeName(wrapper);
break;
case "ViewGroup":
Model.SetParameter(wrapper, "View Group", wrapper.ViewGroup);
break;
case "ViewSubGroup":
Model.SetParameter(wrapper, "View Sub Group", wrapper.ViewSubGroup);
break;
default:
break;
}
}
public override void Apply()
{
var vw = new List<ViewWrapper>();
foreach (ViewWrapper v in SelectedViews)
{
vw.Add(v);
}
Model.Delete(vw);
// update collection so that rows get deleted in datagrid
foreach (ViewWrapper i in vw)
{
Views.Remove(i);
}
}
}
ViewWrapper class:
public abstract class ElementWrapper : ObservableObject
{
public virtual object Self { get; set; }
public virtual ElementId ID { get; set; }
public virtual string Name { get; set; }
}
public class ViewWrapper : ElementWrapper
{
public string ViewType { get; set; }
public bool IsSelected { get; set; }
public bool OnSheet { get; set; }
public string ViewGroup { get; set; }
public string ViewSubGroup { get; set; }
public ViewWrapper ViewTemplate { get; set; }
}
