Here is how we can put the cell into edit mode, set focus, and select the current contents all on the initial click.
Start a new WPF project called EditOnSelection and target any Framework you want.
We will create a DataGrid with different types of columns so we can see how they all work.
<Window x:Class="EditOnSelection.MainWindow"
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"
xmlns:local="clr-namespace:EditOnSelection"
mc:Ignorable="d" Title="EditOnSelect" Height="350" Width="525"
DataContext="{Binding RelativeSource={RelativeSource Self}}">
<Window.Resources>
<FrameworkElement x:Key="ProxyElement"/>
</Window.Resources>
<Grid>
<ContentControl Visibility="Collapsed" Content="{StaticResource ProxyElement}"/>
<DataGrid Grid.Row="1" ItemsSource="{Binding People}"
AutoGenerateColumns="False" IsEnabled="True" SelectionUnit="CellOrRowHeader" SelectionMode="Single" DataGridCell.Selected="DataGrid_Selected" MouseDoubleClick="DataGrid_MouseDoubleClick" CanUserAddRows="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding FirstName}" Header="First Name" Width="*"/>
<DataGridTextColumn Binding="{Binding LastName}" Header="First Name" Width="*"/>
<DataGridCheckBoxColumn Binding="{Binding IsRelated}" Header="Related?" Width="100"/>
<DataGridComboBoxColumn ItemsSource="{Binding DataContext.Genders, Source={StaticResource ProxyElement}}" Header="Gender" SelectedItemBinding="{Binding Gender}" Width="100"/>
</DataGrid.Columns>
</DataGrid>
</Grid>
</Window>
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
namespace EditOnSelection
{
public partial class MainWindow : Window, INotifyPropertyChanged
{
public class cPerson
{
public string
FirstName { get; set; }
public string LastName
{ get; set; }
public bool
IsRelated { get; set; }
public string Gender {
get; set; }
}
private ObservableCollection<cPerson> _People = new ObservableCollection<cPerson>();
public ObservableCollection<cPerson> People
{
get { return _People;
}
set
{
if (!value.Equals(_People))
{
_People = value;
NotifyPropertyChanged("People");
}
}
}
private ObservableCollection<string>
_Genders = new ObservableCollection<string>() { "Male", "Female", "Don't know" };
public ObservableCollection<String> Genders { get { return
_Genders; } }
public MainWindow()
{
InitializeComponent();
}
public event PropertyChangedEventHandler
PropertyChanged;
private void
NotifyPropertyChanged(String info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
private void
DataGrid_Selected(object sender, RoutedEventArgs e)
{
if (e.OriginalSource.GetType() == typeof(DataGridCell))
{
DataGrid g = (DataGrid)sender;
g.BeginEdit(e);
DataGridCell Cell = e.OriginalSource as DataGridCell;
List<TextBox> tbl = FindChildrenByType<TextBox>(Cell);
if (tbl.Count > 0)
{
tbl[0].Focus();
tbl[0].SelectAll();
}
}
}
public static List<T> FindChildrenByType<T>(DependencyObject depObj) where T : DependencyObject
{
List<T>
Children = new List<T>();
if (depObj != null)
{
for (int i = 0; i
<= VisualTreeHelper.GetChildrenCount(depObj)
- 1; i++)
{
DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
if (child != null && child is T)
{
Children.Add((T)child);
}
Children.AddRange(FindChildrenByType<T>(child));
}
}
return Children;
}
private void
DataGrid_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
if (e.OriginalSource.GetType() != typeof(DataGridCell))
{
People.Add(new cPerson());
}
}
}
}
