Thanks for reply.

1. I create a instance of XamWebGrid and set a event handler to KeyDown event.
2. set Data (it has 10,000 rows) to XamWebGrid.ItemsSource.
3. select all rows by XamWebGrid.SelectionSettings.SelectedRows.Add

Process takes about 20 sec at step 3.

But, User can select all rows by mouse, "Click first row and Shift-Click last row".
It takes about 0 sec.

So, I say "too slow".

I think SelectedRows.Add is too slow.

Code is this:

using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using Infragistics.Silverlight.Controls;
using Infragistics.Silverlight;

namespace sample
{
    public partial class MainPage : UserControl
    {
        private XamWebGrid webGrid;

        public MainPage()
        {
            InitializeComponent();
        }

        private void ButtonSearch_Click(object sender, RoutedEventArgs e)
        {
            webGrid = new XamWebGrid();
            webGrid.EditingSettings.AllowEditing = EditingType.None;
            webGrid.SelectionSettings.CellClickAction = CellSelectionAction.SelectRow;
            webGrid.SelectionSettings.RowSelection = SelectionType.Multiple;

            webGrid.KeyDown
                += new System.Windows.Input.KeyEventHandler(onKeyDown);

            Grid.SetColumn(webGrid, 1);
            LayoutRoot.Children.Add(webGrid);

            List<sampleWebService.ITEM> testdata = new List<sampleWebService.ITEM>();
            for (int i = 0; i < 10000; ++i)
            {
                sampleWebService.ITEM item = new sampleWebService.ITEM();
                item.ATTR1 = i.ToString();
                testdata.Add(item);
            }
            webGrid.ItemsSource = testdata;
        }

        private void onKeyDown(object sender, System.Windows.Input.KeyEventArgs e)
        {
            // Ctrl-A
            if (e.Key == System.Windows.Input.Key.A
                && System.Windows.Input.Keyboard.Modifiers == System.Windows.Input.ModifierKeys.Control)
            {
                foreach (var x in webGrid.Rows)
                {
                    webGrid.SelectionSettings.SelectedRows.Add(x);
                }
            }
        }
    }
}

Hi,

I've been able to reproduce your issue but unfortunately currently there isn't other way to make the selection programatically without this delay.

Regards,

Thanks Stoimen.

I hope fix type of "addrange" in next version NetAdvantage for Silverlight.

and I can write:

webGrid.SelectionSettings.SelectedRows.AddRange(webGrid.rows);

or, Add "ctrl-A" action such as DataGrid has.

Thanks.

Hi, 

I agree, that we need to make this simpler in the future, it was just a use case that we overlooked.

However, it is currently possible, with just a little bit of extra work, for now. 

First, create a new class that derives from SelectedRowsCollection. We're going to do this, to expose a protected method, that will make it possible to make Selection quicker:

 public class CustomSelection : SelectedRowsCollection

    {

        public void AddSelectItem(Row r)

        {

            this.SelectItem(r, true);

        }

    }

Now, in a button click, you can do the following:

  private void Button_Click(object sender, RoutedEventArgs e)

        {

            CustomSelection src = new CustomSelection();

            foreach (Row r in this.DataGrid1.Rows)

                src.AddSelectItem(r);

            this.DataGrid1.SelectionSettings.SelectedRows.AddRange(src);

        }

Note, we do plan on making this easier to achieve in the future, but for now, i hope this helps. 

-SteveZ

Were there any changes in recent versions of xamGrid addressing this issue? It would be great if Ctrl + A or at least .SelectAll()  would be supported out-of-the-box.

Thanks, that's it.

The only problem is that I need to select all rows in all groups but this bit I can easily program myself.