WinForm Google Suggest AutoComplete

Initiated from BB Quick Access Button

            dataGridViewBC.ReadOnly = false;

            dataGridViewBC.Columns[1].Visible = false;

            this.toolStripStatusLabel1.Text = "";

            this.textBoxSecurity.Text = "";

            string BBSymbol = ((Button)sender).Text;

            BBSymbol = (BBSymbol.Length == 1) ? BBSymbol.PadRight(2, ' ') : BBSymbol;

            using (SqlConnection cn = new SqlConnection(connString))

            {

                cn.Open();

                SqlCommand cmd = new SqlCommand(@"

                  select distinct 

                     substring(ext_sec_id,1,len(ext_sec_id)-2),

                     substring(ticker,1,len(ticker)-2),

                     sec_name from csm_security where sec_typ_cd='Fut' and ticker like '" + BBSymbol + "__'", cn);

                SqlDataReader r = cmd.ExecuteReader();

                AutoCompleteStringCollection col = new AutoCompleteStringCollection();



                string s = "";

                while (r.Read())

                {

                    s = " " + r.GetValue(0).ToString() + "      " + r.GetValue(1).ToString() + "      " + r.GetValue(2).ToString();

                    col.Add(s);

                }





                this.textBoxSecurity.AutoCompleteCustomSource = col;

                this.textBoxSecurity.Focus();



                if (col.Count == 1)

                {

                    this.textBoxSecurity.Text = s;

                    FillGridView();

                    SetSelectedValueForAllComboEdit();

                }

                if (col.Count >= 2) SendKeys.Send(" ");





Initiated from Search Button



        private void btnSearch_Click(object sender, EventArgs e)

        {

            dataGridViewBC.ReadOnly = false;

            dataGridViewBC.Columns[1].Visible = false;

            this.toolStripStatusLabel1.Text = "";

            if (this.textBoxSecurity.Text.Length <= 1) return;



            if (this.btnSearch.Text == "Get Rates" && this.textBoxSecurity.Text.Trim() != "No Match")

            {

                FillGridView();

                SetSelectedValueForAllComboEdit();

            }

            if (this.btnSearch.Text == "Search")

            {

                List list = FindMatch(_SecurityList, this.textBoxSecurity.Text.Trim());

                _MatchedCollection = new AutoCompleteStringCollection();

                foreach (string s in list)

                {

                    _MatchedCollection.Add(s);

                }

                if (_MatchedCollection.Count == 0) _MatchedCollection.Add(" No Match");

                this.textBoxSecurity.AutoCompleteCustomSource = _MatchedCollection;

                this.textBoxSecurity.Focus();

                this.textBoxSecurity.Clear();

                SendKeys.Send(" ");

                this.btnSearch.Text = "Get Rates";



            }

Fish Eye Xaml

<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <StackPanel.Resources>
        <Style TargetType="{x:Type Button}">
            <Setter Property="HorizontalAlignment" Value="Center" />
            <Setter Property="FontSize" Value="12" />
            <Style.Triggers>
                <EventTrigger RoutedEvent="Button.MouseEnter">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation 
                                Storyboard.TargetProperty="FontSize"
                                To="36" Duration="0:0:1" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
                <EventTrigger RoutedEvent="Button.MouseLeave">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation 
                                Storyboard.TargetProperty="FontSize"
                                To="12" Duration="0:0:0.25" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Style.Triggers>
        </Style>
    </StackPanel.Resources>

    <Button>Button No. 1</Button>
    <Button>Button No. 2</Button>
    <Button>Button No. 3</Button>
    <Button>Button No. 4</Button>
    <Button>Button No. 5</Button>
    <Button>Button No. 6</Button>
    <Button>Button No. 7</Button>
    <Button>Button No. 8</Button>
    <Button>Button No. 9</Button>
</StackPanel>

3D Eye ball UI Try out

<Window
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"
 x:Class="WpfApplication13.MainWindow"
 x:Name="Window"
 Title="MainWindow"
 Width="640" Height="480" Loaded="Window_Loaded">

 <Grid x:Name="LayoutRoot" DataContext="{Binding Source={StaticResource DBApex}}">
  <Grid.RowDefinitions>
   <RowDefinition Height="30"/>
   <RowDefinition Height="*"/>
  </Grid.RowDefinitions>
  <Grid.ColumnDefinitions>
   <ColumnDefinition Width="200" />
   <ColumnDefinition Width="80*" />
  </Grid.ColumnDefinitions>
  <DataGrid x:Name="dg" Margin="8,8,0,8" Grid.Row="1" Grid.ColumnSpan="2" AutoGenerateColumns="False" ItemsSource="{Binding Collection}" FontSize="18.667" SelectionChanged="dg_SelectionChanged">
   <DataGrid.Columns>
    <DataGridCheckBoxColumn Binding="{Binding UD}" Header="UD"/>
    <DataGridTextColumn Binding="{Binding Name}" Header="Name"/>
    <DataGridTextColumn Binding="{Binding Market_Value}" Header="Market_Value"/>
    <DataGridTextColumn Binding="{Binding MTD}" Header="MTD"/>
    <DataGridTextColumn Binding="{Binding QTD}" Header="QTD"/>
    <DataGridTextColumn Binding="{Binding YTD}" Header="YTD"/>
   </DataGrid.Columns>
  </DataGrid>
  <Button x:Name="btnD" Content="Direct" HorizontalAlignment="Right" Margin="0,8,8,0" Width="58" FontSize="8" Click="btnD_Click" />
  <Button x:Name="btnE" Content="EyeBall" HorizontalAlignment="Left" Margin="77,8,0,0" Width="53" FontSize="8" Click="btnE_Click" />
        
        <Viewport3D  ClipToBounds="True" Grid.Row="1" Grid.Column="0"   >
            <Viewport3D.Camera>
                <PerspectiveCamera Position=".2, 0, 1.5" x:Name="camera" LookDirection="-.2,0,-1"/>
            </Viewport3D.Camera>
            <Viewport2DVisual3D >
                <Viewport2DVisual3D.Transform>
                    <RotateTransform3D>
                        <RotateTransform3D.Rotation>
                            <AxisAngleRotation3D x:Name="uiRotate" Angle="40" Axis="0, 1, 0" />
                        </RotateTransform3D.Rotation>
                    </RotateTransform3D>
                </Viewport2DVisual3D.Transform>
                <Viewport2DVisual3D.Geometry>
                    <MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0" TextureCoordinates="0,0 0,1 1,1 1,0" TriangleIndices="0 1 2 0 2 3"/>
                </Viewport2DVisual3D.Geometry>

                <Viewport2DVisual3D.Material>
                    <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True" Brush="White"/>
                </Viewport2DVisual3D.Material>                
                <Viewport2DVisual3D.Visual>
                    <DataGrid x:Name="dg2" ClipToBounds="False" Height="400" Grid.Row="1" Grid.Column="0"  AutoGenerateColumns="False" ItemsSource="{Binding Collection}" FontSize="18.667" VerticalScrollBarVisibility="Visible" SelectionChanged="dg2_SelectionChanged" >
                        <DataGrid.Columns>
                            <DataGridCheckBoxColumn Binding="{Binding UD}" Header="UD"/>
                            <DataGridTextColumn Binding="{Binding Name}" Header="Name"/>
                            <DataGridTextColumn Binding="{Binding Market_Value}" Header="Market_Value"/>
                            <DataGridTextColumn Binding="{Binding MTD}" Header="MTD"/>
                            <DataGridTextColumn Binding="{Binding QTD}" Header="QTD"/>
                            <DataGridTextColumn Binding="{Binding YTD}" Header="YTD"/>
                        </DataGrid.Columns>
                    </DataGrid>
                </Viewport2DVisual3D.Visual>
            </Viewport2DVisual3D>
            <ModelVisual3D>
                <ModelVisual3D.Content>
                    <DirectionalLight Color="#FFFFFFFF" Direction="0,0,-1"/>
                </ModelVisual3D.Content>
            </ModelVisual3D>
        </Viewport3D>            
    </Grid>
</Window>



      private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            dg2.Visibility = System.Windows.Visibility.Collapsed;
        }       

        private void btnE_Click(object sender, RoutedEventArgs e)
        {
            dg.Visibility = System.Windows.Visibility.Collapsed;
            dg2.Visibility = System.Windows.Visibility.Visible;
          
        }

        private void btnD_Click(object sender, RoutedEventArgs e)
        {
            dg.Visibility = System.Windows.Visibility.Visible;
            dg2.Visibility = System.Windows.Visibility.Collapsed;
        }

        protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
        {
            base.OnRenderSizeChanged(sizeInfo);
            Double r = this.ActualHeight / dg2.Height * 300 / 480; r = 0.7;
            camera.Position = new System.Windows.Media.Media3D.Point3D(.2/r, 0, 1.5/r);
        }

        private void dg2_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            //dg.Visibility = System.Windows.Visibility.Visible;
            //dg2.Visibility = System.Windows.Visibility.Collapsed;
        }

        private void dg_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            dg.Visibility = System.Windows.Visibility.Collapsed;
            dg2.Visibility = System.Windows.Visibility.Visible;
        }

Move User Control arround inside Canvas

namespace Reporting.Wpf.UserControls
{
     public class BaseGroupCharts : UserControl 
    {
        protected List RootFunds;
        protected int DrillDownGroupId;
        protected  ApexDataContext _context = ApexDal.Instance.CreateApexDataContext();
        protected bool AllowMove;

        protected List Unlayedouts = new List();
        protected double f = 0.2;

        #region buiding Layed-outs/unlayed-outs

        public virtual void BuildUnlayedouts(bool UseActual) { }

        protected void ShowAtRightUppoerCornerUnlayedouts(bool UseActual, int LeftOffSet, Canvas cv)
        {
            double W = UseActual ? ActualWidth : Width;
            double H = UseActual ? ActualHeight : Height;
            int n = Unlayedouts.Count;
            int col = (int)Math.Round(Math.Sqrt(n * W / H));
            int row = (int)Math.Round(Math.Sqrt(n * H / W));

            for (int i = 0; i < Unlayedouts.Count; i++)
            {
                Resizer r = Unlayedouts[i];
                Canvas.SetLeft(r, (1 - f) * W + r.Width * (i % col) + LeftOffSet);
                Canvas.SetTop(r, r.Height * (int)(i / col));
                cv.Children.Add(r);
            }
        }

        protected void ClearUnlayedouts(Canvas cv)
        {
            List toRemove = new List();
            foreach (var q in cv.Children)
            {
                Resizer r = q as Resizer;
                if (r != null)
                {
                    double left = (double)r.GetValue(Canvas.LeftProperty);
                    double top = (double)r.GetValue(Canvas.TopProperty);
                    if (left >= 0.8 * ActualWidth && top <= 0.2 * ActualHeight) toRemove.Add(r);
                }
            }
            foreach (Resizer r in toRemove) cv.Children.Remove(r);
        }

        #endregion

        #region lock/unlock

        protected bool Locked = true;
        protected void ToggleLockUnlock(Image imgLock, Canvas cv)
        {
            imgLock.Focus();
            if (Locked)
            {
                imgLock.Source = new BitmapImage(new Uri("pack://application:,,,/GMO.AA.Reporting.Wpf;component/Images/Unlock.png"));
                Locked = false;
                foreach (UIElement c in cv.Children)
                {
                    Resizer r = c as Resizer;
                    if (r != null) r.IsGripVisible = true;
                }
                ClearUnlayedouts(cv);
                Unlayedouts.Clear();
                BuildUnlayedouts(true);
                ShowAtRightUppoerCornerUnlayedouts(true, 0, cv);
            }
            else
            {
                imgLock.Source = new BitmapImage(new Uri("pack://application:,,,/GMO.AA.Reporting.Wpf;component/Images/Lock.png"));
                Locked = true;

                ClearUnlayedouts(cv);
                Unlayedouts.Clear();
                BuildUnlayedouts(true);
                ShowAtRightUppoerCornerUnlayedouts(true, 1000, cv);

                foreach (UIElement c in cv.Children)
                {
                    Resizer r = c as Resizer;
                    if (r != null) r.IsGripVisible = false;
                }


            }
        }

        #endregion

        #region Drag Move

        private Point m_StartPoint;
        private double m_OriginalLeft;
        private double m_OriginalTop;
        private Boolean m_IsDown;
        private UIElement m_OriginalElement;
        private Boolean m_IsDragging;


        protected void UserControl_KeyDown(object sender, KeyEventArgs e)
        {

            if (e.Key == Key.LeftCtrl || e.Key == Key.RightCtrl) AllowMove = true;

        }

        protected void UserControl_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.LeftCtrl || e.Key == Key.RightCtrl) AllowMove = false;

        }

        protected void MyCanvas_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            Canvas cv = sender as Canvas;
            if (cv == e.Source || !AllowMove) return;
            m_IsDown = true;
            m_StartPoint = e.GetPosition(sender as Canvas);
            m_OriginalElement = e.Source as UIElement;
            cv.CaptureMouse();
            e.Handled = true;
        }

        protected void MyCanvas_PreviewMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
        {
            if (m_IsDown)
            {
                if (!m_IsDragging && Math.Abs(e.GetPosition(sender as Canvas).X - m_StartPoint.X) > SystemParameters.MinimumHorizontalDragDistance && Math.Abs(e.GetPosition(sender as Canvas).Y - m_StartPoint.Y) > SystemParameters.MinimumVerticalDragDistance)
                {
                    DragStarted();
                }
                if (m_IsDragging)
                {
                    DragMoved(sender as Canvas);
                }
            }
        }


        protected void MyCanvas_PreviewMouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            if (m_IsDown)
            {
                DragFinished(false);
                e.Handled = true;
            }
        }

        protected void DragFinished(bool p)
        {
            System.Windows.Input.Mouse.Capture(null);
            m_IsDragging = false;
            m_IsDown = false;
        }
        protected void DragMoved(Canvas cv)
        {
            Point currentPosition = System.Windows.Input.Mouse.GetPosition(cv);
            double elementLeft = (currentPosition.X - m_StartPoint.X) + m_OriginalLeft;
            double elementTop = (currentPosition.Y - m_StartPoint.Y) + m_OriginalTop;
            Canvas.SetLeft(m_OriginalElement, elementLeft);
            Canvas.SetTop(m_OriginalElement, elementTop);
        }

        protected void DragStarted()
        {
            m_IsDragging = true;
            m_OriginalLeft = Canvas.GetLeft(m_OriginalElement);
            m_OriginalTop = Canvas.GetTop(m_OriginalElement);

        }

        #endregion

        #region Resize

        protected void MyCanvas_SizeChanged(object sender, SizeChangedEventArgs e)
        {
            if (e.PreviousSize.Height == 0 || e.PreviousSize.Width == 0) return;
            double rH = e.NewSize.Height / e.PreviousSize.Height;
            double rW = e.NewSize.Width / e.PreviousSize.Width;
            Canvas cv = sender as Canvas;

            foreach (UIElement c in cv.Children)
            {
                Resizer r = c as Resizer;
                if (r != null)
                {
                    r.Width = r.Width * rW;
                    r.Height = r.Height * rH;
                    r.SetValue(Canvas.LeftProperty, (double)r.GetValue(Canvas.LeftProperty) * rW);
                    r.SetValue(Canvas.TopProperty, (double)r.GetValue(Canvas.TopProperty) * rH);
                }
            }
        }

        #endregion

    }
}




using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using GMO.AA.Reporting.Wpf.Common;
using GMO.AA.Reporting.Domain.Objects;
using System.DirectoryServices.AccountManagement;
using System.IO;
using GMO.OpenSource.Windows.Controls;
using GMO.AA.Reporting.UI.Core;


namespace Reporting.Wpf.UserControls
{
    /// 

    /// Interaction logic for GroupCharts.xaml
    /// 
    public partial class GroupChartsCanvas : BaseGroupCharts
    {
        public event DrillDownRequestedEventHandler DrillDownRequested;

        public GroupChartsCanvas(List list,int drillDownGroupId)
        {
            InitializeComponent();
            RootFunds = list;
            DrillDownGroupId = drillDownGroupId;
            _context = ApexDal.Instance.CreateApexDataContext();
            GetCustomGroupData();
        }


        #region CG data

        IEnumerable cGroups;
        void GetCustomGroupData()
        {
            string userName = UserPrincipal.Current.DisplayName;

            cGroups = (from x in _context.CustomGroups
                                               where x.RelatedGroupId == DrillDownGroupId && !x.Deleted &&
                                              (x.Public == true || x.CreatedByUserName == userName)
                                               select x).OrderBy(y => y.CustomGroupName);
        }

        #endregion

        #region override Un-Layed-outs in upper right corner

    
        public override void BuildUnlayedouts(bool UseActual)
        {
            double W = UseActual ? ActualWidth : Width;
            double H = UseActual ? ActualHeight : Height;
            int n = cGroups.Count()+1;

            double LCw = f * W, LCh = f * H;
            int col = (int)Math.Round(Math.Sqrt(n * W / H));
            int row = (int)Math.Round(Math.Sqrt(n * H / W));
            foreach (CustomGroup cg in cGroups)
            {
                Resizer r = new Resizer() { Height = LCh / row, Width = LCw / col, ToolTip = cg.CustomGroupName };
                CustomGroupExposureChart cgec = new CustomGroupExposureChart(cg, ChartVendors.Infragistic);
                cgec.AllowDataPointDrillDown = true;
                cgec.RelatedGroupName = EventEngine.Instance.SelectedGroup.GroupName;
                cgec.DrillDownRequested += new DrillDownRequestedEventHandler(cgec_DrillDownRequested);
                r.Content = cgec;
                Unlayedouts.Add(r);
            }
            Resizer r1 = new Resizer() { Height = LCh / row, Width = LCw / col, ToolTip = "Currency Exposure"};
            r1.Content = new CurrencyExposureChart();
            Unlayedouts.Add(r1);

            Resizer r2 = new Resizer() { Height = LCh / row, Width = LCw / col, ToolTip = "CountryExposure" };
            r2.Content = new CountryExposureChart();
            Unlayedouts.Add(r2);

            Resizer r3 = new Resizer() { Height = LCh / row, Width = LCw / col, ToolTip = "Sector Exposure" };
            r3.Content = new SectorExposureChart();
            Unlayedouts.Add(r3);
        }

        void cgec_DrillDownRequested(object sender, DrillDownRequestedEventArgs e)
        {
            if (DrillDownRequested != null)
                DrillDownRequested(sender,new DrillDownRequestedEventArgs() { GroupId = DrillDownGroupId, RelatedGroupId = e.RelatedGroupId, GroupName=e.GroupName, CustomGroup=e.CustomGroup, RelatedGroupName=e.RelatedGroupName });
        }

        #endregion

        #region Control Events

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            BuildUnlayedouts(true);
            ShowAtRightUppoerCornerUnlayedouts(true, 1000, MyCanvas);         
            foreach (UIElement c in MyCanvas.Children)
            {
                Resizer r = c as Resizer;
                if (r != null) r.IsGripVisible = false;
            }
            Focus();
        }

        private void imgEdit_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            ToggleLockUnlock(imgLock, MyCanvas);

        }

        #endregion

    }
}


Resizer comes from Kent Boogaart

http://kentb.blogspot.com/2007/04/resizer-wpf-control.html

Drag Move UI Element inside a Canvas

        private Point m_StartPoint;
        private double m_OriginalLeft;
        private double m_OriginalTop;
        private Boolean m_IsDown;
        private UIElement m_OriginalElement;
        private Boolean m_IsDragging;

        private void MyCanvas_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (MyCanvas == e.Source || !AllowMove) return;
            m_IsDown = true;
            m_StartPoint = e.GetPosition(MyCanvas);
            m_OriginalElement = e.Source as UIElement;
            MyCanvas.CaptureMouse();
            e.Handled = true;
        }

        private void MyCanvas_PreviewMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
        {
            if (m_IsDown)
            {
                if (!m_IsDragging && Math.Abs(e.GetPosition(MyCanvas).X - m_StartPoint.X) > SystemParameters.MinimumHorizontalDragDistance && Math.Abs(e.GetPosition(MyCanvas).Y - m_StartPoint.Y) > SystemParameters.MinimumVerticalDragDistance)
                {
                    DragStarted();
                }
                if (m_IsDragging)
                {
                    DragMoved();
                }
            }
        }


        private void MyCanvas_PreviewMouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            if (m_IsDown)
            {
                DragFinished(false);
                e.Handled = true;
            }
        }

        private void DragFinished(bool p)
        {
            System.Windows.Input.Mouse.Capture(null);
            m_IsDragging = false;
            m_IsDown = false;
        }
        private void DragMoved()
        {
            Point currentPosition = System.Windows.Input.Mouse.GetPosition(MyCanvas);
            double elementLeft = (currentPosition.X - m_StartPoint.X) + m_OriginalLeft;
            double elementTop = (currentPosition.Y - m_StartPoint.Y) + m_OriginalTop;
            Canvas.SetLeft(m_OriginalElement, elementLeft);
            Canvas.SetTop(m_OriginalElement, elementTop);            
        }

        private void DragStarted()
        {
            m_IsDragging = true;
            m_OriginalLeft = Canvas.GetLeft(m_OriginalElement);
            m_OriginalTop = Canvas.GetTop(m_OriginalElement);
            
        }

Parallel Data Fetching by F#

namespace JQD.Parallel
open System
open System.Collections.Generic
type DataFetcher() =
    let f (hhr) =Reporting.HoldingMapper.MapHolding(hhr)
    let f2 (ar:Reporting.Domain.Objects.GetHoldingsHierarchyResult[]) =
            ar|> Array.Parallel.map (fun (g) -> Reporting.HoldingMapper.MapHolding(g))
              |> Array.Parallel.map (fun h -> h.MarketValue ) 
              |> Array.sum 

    member this.DA(ar:Reporting.Domain.Objects.GetHoldingsHierarchyResult[]) =
            ar|> Array.Parallel.map (fun (g) -> Reporting.HoldingMapper.MapHolding(g))
              |> Array.Parallel.map (fun h -> h.MarketValue ) 
              |> Array.sum 

    member this.DA3(ar:DateTime[],groupId:int) =
            ar|> Array.Parallel.map( fun i -> Seq.toArray(Reporting.Dal.GetHoldingsHierarchy(groupId,i,i)))
              |> Array.Parallel.map(fun g -> f2(g))
              

WPF DataGrid Row/Cell Accessor

       public static T GetVisualChild<T>(Visual parent) where T : Visual
        {
            T child = default(T);
            int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
            for (int i = 0; i < numVisuals; i++)
            {
                Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
                child = v as T;
                if (child == null)
                {
                    child = GetVisualChild<T>(v);
                }
                if (child != null)
                {
                    break;
                }
            }
            return child;
        }

        public static DataGridRow GetSelectedRow( DataGrid grid)
        {
            return (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(grid.SelectedItem);
        }

        public static DataGridRow GetRow( DataGrid grid, int index)
        {
            DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
            if (row == null)
            {
                // May be virtualized, bring into view and try again.
                grid.UpdateLayout();
                grid.ScrollIntoView(grid.Items[index]);
                row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
            }
            return row;
        }

        public static DataGridCell GetCell( DataGrid grid, DataGridRow row, int column)
        {
            if (row != null)
            {
                DataGridCellsPresenter presenter = GetVisualChild(row);

                if (presenter == null)
                {
                    grid.ScrollIntoView(row, grid.Columns[column]);
                    presenter = GetVisualChild<DataGridCellsPresenter>(row);
                }

                DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
                return cell;
            }
            return null;
        }

        public static DataGridCell GetCell( DataGrid grid, int row, int column)
        {
            DataGridRow rowContainer = GetRow(grid,row);
            return GetCell(grid,rowContainer, column);
        }