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POwpf DataGrid automatically edit cell with CustomControl at DataTemplate
 

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  1. POwpf DataGrid automatically edit cell with CustomControl at DataTemplate
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    <p>I Have a wpf datagrid with some hughe rows and some editable cells on each row. </p> <p>I want to make the cells editable just when the user navigate to it, Instead using click or dbl click. something like Excel.</p> <p>1- Is it possible with Datagrid? how to perform it ?</p> <p>2- How can i do to let user commit cell changes using arrow keys ? </p> <p><strong>UPDATE:</strong></p> <pre><code>&lt;DataGrid x:Name="DataGridDatosPlanillla" Margin="5" Grid.Row="1" Width="Auto" Height="Auto" Grid.ColumnSpan="2" CanUserReorderColumns="False" AutoGenerateColumns="False" ItemsSource="{Binding Path=PlanillaDetalle}" SelectionChanged="DataGridDatosPlanillla_SelectionChanged" Style="{StaticResource ResourceKey=Datagridstyle}" KeyboardNavigation.AcceptsReturn="True" KeyboardNavigation.DirectionalNavigation="Contained" BeginningEdit="DataGridDatosPlanillla_BeginningEdit" CurrentCellChanged="DataGridDatosPlanillla_CurrentCellChanged" FocusableChanged="DataGridDatosPlanillla_FocusableChanged"&gt; &lt;DataGrid.Columns&gt; &lt;DataGridTextColumn IsReadOnly="True" Binding="{Binding Path=Orden}" ClipboardContentBinding="{x:Null}" Header="{x:Static resources:Labels.GENERAL_IdFila}" CanUserSort="False"/&gt; &lt;DataGridTextColumn IsReadOnly="True" Binding="{Binding Path=Merlin_Contratos.StrNombreUsuario}" ClipboardContentBinding="{x:Null}" Header="{x:Static resources:Labels.ACOPIO_NombreTercero}" CanUserSort="False"/&gt; &lt;DataGridTextColumn IsReadOnly="True" Binding="{Binding Path=Merlin_ConceptosFacturacion.StrDescripcionConcepto}" ClipboardContentBinding="{x:Null}" Header="{x:Static resources:Labels.ITEMS_Nombre}" CanUserSort="False"/&gt; &lt;DataGridTemplateColumn ClipboardContentBinding="{x:Null}" Header="{x:Static resources:Labels.ACOPIO_Recogida1}" CanUserSort="False"&gt; &lt;DataGridTemplateColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;controls:NumericTextBox DecimalPlaces="{Binding Path=Merlin_ConceptosFacturacion.IntPlazasDecimales}" Text="{Binding Path=QProductor1}" BorderThickness="0"/&gt; &lt;/DataTemplate&gt; &lt;/DataGridTemplateColumn.CellTemplate&gt; &lt;/DataGridTemplateColumn&gt; &lt;DataGridTemplateColumn ClipboardContentBinding="{x:Null}" Header="{x:Static resources:Labels.ACOPIO_CantidadDescontada}" CanUserSort="False" CanUserResize="False"&gt; &lt;DataGridTemplateColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;controls:NumericTextBox DecimalPlaces="{Binding Path=Merlin_ConceptosFacturacion.IntPlazasDecimales}" Text="{Binding Path=QDescontada}"/&gt; &lt;/DataTemplate&gt; &lt;/DataGridTemplateColumn.CellTemplate&gt; &lt;/DataGridTemplateColumn&gt; &lt;DataGridTemplateColumn IsReadOnly="True" ClipboardContentBinding="{x:Null}" Header="{x:Static resources:Labels.ACOPIO_TotalRecibido}" CanUserSort="False" CanUserResize="False"&gt; &lt;DataGridTemplateColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;controls:NumericTextBox DecimalPlaces="{Binding Path=Merlin_ConceptosFacturacion.IntPlazasDecimales}" Text="{Binding Path=QRecibida}"/&gt; &lt;/DataTemplate&gt; &lt;/DataGridTemplateColumn.CellTemplate&gt; &lt;/DataGridTemplateColumn&gt; &lt;/DataGrid.Columns&gt; &lt;/DataGrid&gt; </code></pre> <p>And this is my Custom control </p> <pre><code>using System; using System.Collections.Generic; using System.Globalization; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; namespace Recursos.Controls { public class CustomFormat : IFormatProvider, ICustomFormatter { int DecimalPlaces = 0; public CustomFormat(int decimalPlaces) { DecimalPlaces = decimalPlaces; } public object GetFormat(Type FormatType) { if (FormatType == typeof(ICustomFormatter)) return this; else return null; } public string Format(string format, object arg, IFormatProvider formatProvider) { if (!this.Equals(formatProvider)) return null; if (string.IsNullOrEmpty(format)) format = "N"; string numericString = arg.ToString(); return numericString; } } public class NumericTextBox : TextBox { #region Formato private string previousText = ""; private bool ApplyingFormat = false; private CultureInfo _CI = new CultureInfo(CultureInfo.CurrentCulture.LCID,true); public CultureInfo CI { get { return _CI; } set { _CI = value; } } public static readonly DependencyProperty DecimlaPlacesProperty = DependencyProperty.Register( "DecimalPlaces", typeof(int), typeof(NumericTextBox), new FrameworkPropertyMetadata(0, FrameworkPropertyMetadataOptions.None, new PropertyChangedCallback(OnDecimalPlacesChanged) ) ); private static void OnDecimalPlacesChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { } /// &lt;summary&gt; /// Numero de plazas decimales /// &lt;/summary&gt; public int DecimalPlaces { get { return (int)GetValue(DecimlaPlacesProperty); } set { SetValue(DecimlaPlacesProperty,value); _CI.NumberFormat.NumberDecimalDigits = value; } } public Decimal DecimalValue = 0; private string _DecimalSeparator = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator; public string DecimalSeparator { get { return _DecimalSeparator; } set { _DecimalSeparator = value; _CI.NumberFormat.NumberDecimalSeparator = _DecimalSeparator; } } //public string DecimalSeparator = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator; #endregion public NumericTextBox() { HorizontalContentAlignment = HorizontalAlignment.Right; DataObject.AddPastingHandler(this, OnPaste); } private void OnPaste(object sender, DataObjectPastingEventArgs dataObjectPastingEventArgs) { var isText = dataObjectPastingEventArgs.SourceDataObject.GetDataPresent(System.Windows.DataFormats.Text, true); if (isText) { var text = dataObjectPastingEventArgs.SourceDataObject.GetData(DataFormats.Text) as string; if (IsTextValid(text)) { return; } } dataObjectPastingEventArgs.CancelCommand(); } private bool IsTextValid(string enteredText) { // If keyboard insert key is in toggled mode, and the actual insert point is Decimalseparator, we must avoid to overwrite it if (SelectionStart == this.Text.IndexOf(DecimalSeparator) &amp; System.Windows.Input.Keyboard.GetKeyStates(System.Windows.Input.Key.Insert) == System.Windows.Input.KeyStates.Toggled) { SelectionStart += 1; } if (!enteredText.All(c =&gt; Char.IsNumber(c) || c == DecimalSeparator.ToCharArray()[0] || c == '-')) { return false; } //We only validation against unselected text since the selected text will be replaced by the entered text var unselectedText = this.Text.Remove(SelectionStart, SelectionLength); if ( enteredText == DecimalSeparator &amp;&amp; unselectedText.Contains(DecimalSeparator)) { // Before return false, must move cursor beside Decimal separator SelectionStart = this.Text.IndexOf(DecimalSeparator) + 1; return false; } if (enteredText == "-" &amp;&amp; unselectedText.Length &gt; 0) { return false; } return true; } private bool ApplyFormat(TextChangedEventArgs e) { if (!ApplyingFormat) { ApplyingFormat = true; int SelectionStartActual = SelectionStart; string FinallText = this.Text; if (!FinallText.Contains(DecimalSeparator) &amp; DecimalPlaces &gt; 0) { FinallText = String.Format("{0}{1}{2}", this.Text, DecimalSeparator, new string('0', DecimalPlaces)); } bool state = Decimal.TryParse(FinallText, NumberStyles.AllowCurrencySymbol | NumberStyles.AllowDecimalPoint | NumberStyles.AllowTrailingSign, _CI, out DecimalValue); DecimalValue = Math.Round(DecimalValue, DecimalPlaces); if (DecimalValue == 0) { FinallText = ""; } else { if (FinallText != DecimalValue.ToString(_CI)) { FinallText = DecimalValue.ToString(_CI); } } if (FinallText != this.Text) { this.Text = FinallText; SelectionStart = SelectionStartActual; } previousText = this.Text; ApplyingFormat = false; return state; } else { return true; } } protected override void OnTextChanged(TextChangedEventArgs e) { e.Handled = !ApplyFormat(e); base.OnTextChanged(e); } protected override void OnPreviewTextInput(System.Windows.Input.TextCompositionEventArgs e) { e.Handled = !IsTextValid(e.Text); base.OnPreviewTextInput(e); } } } </code></pre>
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