I had fun today trying to work out why I could not get the date column of a data form grid to be formatted correctly. Listed below is some xaml markup of the dataform..
1: <df:DataForm x:Name="Form1" ItemsSource="{Binding Mode=OneWay}" AutoGenerateFields="True"
2: AutoEdit="True" AutoCommit="False"
3: CommitButtonContent="Save"
4: CancelButtonContent="Cancel"
5: CommandButtonsVisibility="Commit"
6: LabelPosition="Top" ScrollViewer.VerticalScrollBarVisibility="Disabled"
7: EditEnded="NoteForm_EditEnded">
8: <df:DataForm.EditTemplate>
9: <DataTemplate>
10: <StackPanel>
11: <df:DataField>
12: <TextBox Text="{Binding Title, Mode=TwoWay}"/>
13: </df:DataField>
14: 15: <df:DataField>
16: <TextBox Text="{Binding Description, Mode=TwoWay}" AcceptsReturn="True" HorizontalScrollBarVisibility="Auto"
17: VerticalScrollBarVisibility="Auto" Height="" TextWrapping="Wrap" SizeChanged="TextBox_SizeChanged"/>
18: </df:DataField>
19: 20: <df:DataField>
21: <TextBlock Text="{Binding Username}"/>
22: </df:DataField>
23: 24: <df:DataField>
25: <TextBlock Text="{Binding DateCreated}"/>
26: </df:DataField>
27: </StackPanel>
28: </DataTemplate>
29: </df:DataForm.EditTemplate>
30: </df:DataForm>
The problem with this is no matter what format parameter I put on the annotation
1: /// <summary>
2: /// Gets or sets the date created of the noteannotation
3: /// </summary>
4: [Display(Name="Date Created")]
5: [Editable(false)]
6: [DisplayFormat(DataFormatString = "{0:u}", ApplyFormatInEditMode = true)]
7: public DateTime DateCreated { get; set; }
it was being displayed as 4/6/2010 10:02:15 AM
This is the default binding format on the dataform. To solve this a convertor needed to be added to the datafield in question.
1: <df:DataField>
2: <TextBlock Text="{Binding DateCreated, Converter={StaticResource DateConverter}}"/>
3: </df:DataField>
The DateConverter is just a class than implements the IValueConverter interface. Example below shows the date time format I needed..
1: /// <summary>
2: /// Date time formatter - for short dates for data bound items
3: /// </summary>
4: public class DateConverter : IValueConverter
5: { 6: #region Public Methods
7: 8: #region IValueConvertor Members
9: 10: /// <summary>
11: /// Convert data item to a short date
12: /// </summary>
13: /// <param name="value">Value</param>
14: /// <param name="targetType">Target type</param>
15: /// <param name="parameter">Paramter</param>
16: /// <param name="culture">Culture</param>
17: /// <returns>Converted object</returns>
18: public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
19: { 20: var date = (DateTime)value;
21: return (date.ToString("dd/MM/yyyy HH:mm:ss"));
22: } 23: 24: /// <summary>
25: /// Convert back data item to a short date
26: /// </summary>
27: /// <param name="value">Value</param>
28: /// <param name="targetType">Target type</param>
29: /// <param name="parameter">Paramter</param>
30: /// <param name="culture">Culture</param>
31: /// <returns>Converted object</returns>
32: public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
33: { 34: var s = (string)value;
35: return (DateTime.Parse(s));
36: } 37: 38: #endregion IValueConvertor Members
39: 40: #endregion Public Methods
41: }This works like a treat - could be improved with some null checking! :)
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