How to Display and select items in a Datagrid ComboBox with WPF C#, using MVVM

Question

I want to be able to choose either \"true\" or \"false\"(boolean) from a ComboBox that is within a wpf Datagrid and be able to save that choice to my database.

I wan

Answer 1

As I can understand the problem is how to bind some XAML resource as a combo ItemsSource and in addtion how to binnd the selected value of a combo to the model behind the DataGrid row. 1. List item:

<Window x:Class="SoDataGridProjectsHelpAttempt.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:soDataGridProjectsHelpAttempt="clr-namespace:SoDataGridProjectsHelpAttempt"
    xmlns:system="clr-namespace:System;assembly=mscorlib"
    Title="MainWindow" Height="350" Width="525">
<Window.Resources>
    <x:Array x:Key="CountriesArray" Type="soDataGridProjectsHelpAttempt:Country">
        <soDataGridProjectsHelpAttempt:Country CountryName="Germany" CountryPop="150k"/>
        <soDataGridProjectsHelpAttempt:Country CountryName="France" CountryPop="125k"/>
        <soDataGridProjectsHelpAttempt:Country CountryName="Belarus" CountryPop="165k"/>
    </x:Array>
    <x:Array x:Key="StatusArray" Type="soDataGridProjectsHelpAttempt:ActivityStatus">
        <soDataGridProjectsHelpAttempt:ActivityStatus VerbalStatus="Yes" BoolStatus="True"/>
        <soDataGridProjectsHelpAttempt:ActivityStatus VerbalStatus="No" BoolStatus="False"/>
    </x:Array>
</Window.Resources>
<Window.DataContext>
    <soDataGridProjectsHelpAttempt:DataGridMainDataContext/>
</Window.DataContext>
<Grid>
    <DataGrid ItemsSource="{Binding Collection}" AutoGenerateColumns="False" CanUserAddRows="True">
        <DataGrid.Columns>
            <DataGridTextColumn     Width="Auto" Binding="{Binding UName}"/>
            <DataGridComboBoxColumn Header="Country" DisplayMemberPath="CountryName"
                                    ItemsSource="{StaticResource CountriesArray}" Width="Auto"
                                    SelectedItemBinding="{Binding CountryData}"/>
            <!--<DataGridComboBoxColumn Header="ActivityStatus" Width="Auto" ItemsSource="{StaticResource StatusArray}" 
                                    SelectedValueBinding="{Binding IsActive}" SelectedValuePath="BoolStatus" DisplayMemberPath="VerbalStatus"/>-->
            <DataGridComboBoxColumn Header="ActivityStatus" SelectedItemBinding="{Binding IsActive, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
                <DataGridComboBoxColumn.ItemsSource>
                    <x:Array Type="system:Boolean">
                        <system:Boolean>True</system:Boolean>
                        <system:Boolean>False</system:Boolean>
                    </x:Array>
                </DataGridComboBoxColumn.ItemsSource>
            </DataGridComboBoxColumn>
        </DataGrid.Columns>
    </DataGrid>
</Grid>

2. DataGrid viewmodel:

   public class DataGridMainDataContext
   

   { public DataGridMainDataContext() { Collection = new ObservableCollection(new List { new UserData { UName = "Greg", IsActive = false, }, new UserData { UName = "Joe", IsActive = false, }, new UserData { UName = "Iv", IsActive = false, } });

   }
   
   public ObservableCollection<UserData> Collection { get; set; }
   

   }

3. Models: public class UserData : BaseObservableObject { private string _uName; private object _countryData; private bool _isActive;

   public bool IsActive
   {
       get { return _isActive; }
       set
       {
           _isActive = value;
           OnPropertyChanged();
       }
   }
   
   public string UName
   {
       get { return _uName; }
       set
       {
           _uName = value;
           OnPropertyChanged();
       }
   }
   
   public object CountryData
   {
       get { return _countryData; }
       set
       {
           _countryData = value;
           OnPropertyChanged();
       }
   }
   

   }

   public class ActivityStatus:BaseObservableObject { private bool _boolStatus; private string _verbalStatus;

   public bool BoolStatus
   {
       get { return _boolStatus; }
       set
       {
           _boolStatus = value;
           OnPropertyChanged();
       }
   }
   
   public string VerbalStatus
   {
       get { return _verbalStatus; }
       set
       {
           _verbalStatus = value;
           OnPropertyChanged();
       }
   }
   

   }

   public class Country : BaseObservableObject { private string _countryName; private string _countryPop;

   public string CountryName
   {
       get { return _countryName; }
       set
       {
           _countryName = value;
           OnPropertyChanged();
       }
   }
   
   public string CountryPop
   {
       get { return _countryPop; }
       set
       {
           _countryPop = value;
           OnPropertyChanged();
       }
   }
   
   public Country() { }
   public Country(string n, string d)
   {
       this.CountryName = n;
       this.CountryPop = d;
   }
   

   } Hope it will help you.

regards,