WPF DataGrid programmatic multiple row selection

Question

Is there anything simpler than sample below ? I do have observable collection ( "list" in the code ) bound to DataGrid lstLinks

for (int i = 0; i < list.Count ; i++)
{
    object rowItem = lstLinks.Items[i] ; 
    DataGridRow visualItem =  (DataGridRow)lstLinks.ItemContainerGenerator.ContainerFromItem(rowItem);
    if ( visualItem == null ) break;  
    if (list[i].Changed)
        visualItem.IsSelected = false;
    else
         visualItem.IsSelected = false; 

}

And it only works for visible rows. – MicMit Mar 25 '10 at 01:47 — MicMit, Mar 25 '10 at 01:47

score 9 · Answer 1 · answered Mar 30 '11 at 08:17

Salam MicMit :)

Yeah, there is a more simple solution, you need just to add the items you want from your bound list to your DataGrid SelectedItems collection, see the code below: [Don't forget to mark as answer if this post solved your problem :)]

<Window x:Class="ProgGridSelection.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525" Loaded="OnWindowLoaded">
<StackPanel>
    <DataGrid Name="empDataGrid" ItemsSource="{Binding}" Height="200"/>
    <TextBox Name="empNameTextBox"/>
    <Button Content="Click" Click="OnSelectionButtonClick" />
</StackPanel>

public partial class MainWindow : Window
{
    public class Employee
    {
        public string Code { get; set; }
        public string Name { get; set; }
    }

    private ObservableCollection<Employee> _empCollection;

    public MainWindow()
    {
        InitializeComponent();
    }

    private void OnWindowLoaded(object sender, RoutedEventArgs e)
    {
        // Generate test data
        _empCollection =
            new ObservableCollection<Employee>
                {
                    new Employee {Code = "E001", Name = "Mohammed A. Fadil"},
                    new Employee {Code = "E013", Name = "Ahmed Yousif"},
                    new Employee {Code = "E431", Name = "Jasmin Kamal"},
                    new Employee {Code = "E431", Name = "Zuhair Zein"},
                    new Employee {Code = "E431", Name = "Layla Abdullah"},
                };

        /* Set the Window.DataContext, alternatively you can set your
         * DataGrid DataContext property to the employees collection.
         * on the other hand, you you have to bind your DataGrid
         * DataContext property to the DataContext (see the XAML code)
         */
        DataContext = _empCollection;
    }

    private void OnSelectionButtonClick(object sender, RoutedEventArgs e)
    {
        /* select the employee that his name matches the
         * name on the TextBox
         */
        var emp = (from i in _empCollection
                   where i.Name == empNameTextBox.Text.Trim()
                   select i).FirstOrDefault();

        /* Now, add it to your DataGrid SelectedItems collection to
         * add the item to the selected rows
         */
        if (emp != null)
            empDataGrid.SelectedItems.Add(emp);
    }
}

This Breaks the MVVM Pattern, and MVC, But this wasn't stated in the question. — Tomer W, Jun 21 '12 at 14:41
@TomerW. Yes, but this is another issue. I preferred to focus on the problem and make the solution as simple as possible. — Mohammed A. Fadil, Jun 21 '12 at 17:22
possible... heck.. if you have asked me about 2 months ago, i would say 1. i am a winforms guy... 2. exactly like that :) — Tomer W, Jun 21 '12 at 18:09

score 1 · Answer 2 · edited May 23 '17 at 12:15

1

MVVM Require more tender solution,
but it is MVVM and it is fully testable and easy to maintain.

Take a look here Managing multiple selections with MVVM

edited May 23 '17 at 12:15

Community

1
1

answered Jun 21 '12 at 14:44

Tomer W

3,395
2
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score 0 · Answer 3 · edited Dec 14 '13 at 19:11

0

Yeah, this solution is better than hacking into the DataGrid control, and if you want to select only one row you can also use the following code:

myDataGrid.SelectedItem = item;

where the item is one of the items bound the DataGrid.

edited Dec 14 '13 at 19:11

BenMorel

34,448
50
182
322

answered Mar 30 '11 at 13:17

1

how exactly that do multi-selection? – Tomer W Jun 21 '12 at 18:08

score 0 · Answer 4 · answered Apr 14 '21 at 14:59

0

Assuming lstLinks is a WPF DataGrid, this adds item at position i to the selected items:

lstLinks.SelectedItems.Add(lstLinks.Items[i]);

To unselect everything:

lstLinks.SelectedItems.Clear();

answered Apr 14 '21 at 14:59

Jordi

2,055
1
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WPF DataGrid programmatic multiple row selection

4 Answers4

Salam MicMit :)