xamGrid Custom DateColumn | Infragistics Forums

Hi Elena,

If thats the case then perhaps this is a trivial issue and some technical error on my implementation. Here is a quick sample:

Custom Column Class using nullable dateTime? :

public class CustomDateColumn : DateColumn
        {            
            protected override ColumnContentProviderBase GenerateContentProvider()
            {
                return new DateTimeColumnContentProvider();
            }
 
            public static readonly DependencyProperty ContentProperty =
                                    DependencyProperty.Register("Content", typeof(DateTime?),
                                        typeof(CustomDateColumn),
                                        new PropertyMetadata(
                                            new PropertyChangedCallback(ContentChanged)));
 
            public DateTime? Content
            {
                get { return (DateTime?)this.GetValue(ContentProperty); }
                set { this.SetValue(ContentProperty, value); }
            }
            private static void ContentChanged(DependencyObject obj,
                               DependencyPropertyChangedEventArgs e)
            {
                CustomDateColumn col = (CustomDateColumn)obj;
                col.OnPropertyChanged("Content");
            }
 
            public static readonly DependencyProperty ContentBindingProperty =
                DependencyProperty.Register("ContentBinding",
                    typeof(Binding), typeof(CustomDateColumn),
                    new PropertyMetadata(
                        new PropertyChangedCallback(ContentBindingChanged)));
 
            public Binding ContentBinding
            {
                get { return (Binding)this.GetValue(ContentBindingProperty); }
                set { this.SetValue(ContentBindingProperty, value); }
            }
 
            private static void ContentBindingChanged(DependencyObject obj,
                DependencyPropertyChangedEventArgs e)
            {
                CustomDateColumn col = (CustomDateColumn)obj;
                col.OnPropertyChanged("ContentBinding");
            }  
        }

Column Provider Class using CustomDateColumn:

As far as I know you must override 'ResolveDisplayElement' in order to utilize your

own control for display purposes. In this case I just used a datePicker. I have tried binding to other

properties but it hasn't seemed to affect the outcome for sorting, which fails to sort properly.

public class DateTimeColumnContentProvider : DateColumnContentProvider
        {
            Cell _cell;
            CustomDateColumn _column;
            DatePicker _dtPicker;
                
            public DateTimeColumnContentProvider()
            {                
                _dtPicker = new DatePicker();               
            }
            
            public override FrameworkElement ResolveDisplayElement(Cell cell, System.Windows.Data.Binding cellBinding)
            {
                _column = (CustomDateColumn)cell.Column;
 
                Binding binding = new Binding(_column.Key);
                if (_column.Content == null)
                {
                    binding.Mode = BindingMode.OneWay;
                    if (_column.ContentBinding != null)
                    {
                        this._dtPicker.SetBinding(DatePicker.TextProperty,
                                                _column.ContentBinding);
                    }
                    else
                    {
                        this._dtPicker.SetBinding(DatePicker.TextProperty, binding);
                    }
                }
                else
                {
                    binding = new Binding("Text");
                    binding.Source = _column;
                    this._dtPicker.SetBinding(DatePicker.TextProperty, binding);
                }
                return _dtPicker;
            }       
        
            public override void AdjustDisplayElement(Infragistics.Controls.Grids.Cell cell)
            {                
                this._cell = cell;
                base.AdjustDisplayElement(cell);            
            }
 
            public override object ApplyFormatting(object value, Column column, System.Globalization.CultureInfo culture)
            {
                return base.ApplyFormatting(value, column, culture);
            }
        }