Issues usingValueConverter in a DataTemplate with XCeed DataGridControl

[jxbma]

#50404 |

Hi:
I have a WPF application with an XCeed DataGridControl.
I’m trying to use an IValueConverter to convert a data cell (int? value)’s contents as follows.

If value == null or non-numeric then display ‘N/A’
If value is numeric then display the value.

I’m binding the grid to an ObservableCollection of this class:

public class SampleClass 
{
public int? SampleNullableIntValue { get; set; }
}

Here is my value converter:

  public class NumericNullConverter : IValueConverter
    {
        private bool IsNumber(object value)
        {
            return value is sbyte
                    || value is byte
                    || value is short
                    || value is ushort
                    || value is int
                    || value is uint
                    || value is long
                    || value is ulong
                    || value is float
                    || value is double
                    || value is decimal;
        }
        public object Convert(object value, Type targetType, 
                             object parameter, 
                             System.Globalization.CultureInfo culture)
        {
            if (value == null)
            {
                return parameter;
            }

            if (IsNumber(value))
            {
                var num = System.Convert.ToInt64(value);
                if (num != 0L)
                {
                    return value;
                }
            }
            return parameter;
        }

        public object ConvertBack(
              object value, Type targetType, object parameter,
               System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

Here is my Data Template Definition:

<DataTemplate x:Key="NumericNullContentTemplate">
    <TextBlock Text="{Binding Converter={StaticResource
             NumericNullOrZeroConvert}, ConverterParameter='N/A'}" TextAlignment="Center" />
</DataTemplate>

Here is my XCeed DataGridControl definition, with the DataGridColumn using the above defined template:

 <xcdg:DataGridControl> 
  <xcdg:DataGridControl.Columns>
     <xcdg:Column SampleNullableIntValue Title="SampleTitle" 
    CellContentTemplate="{StaticResource NumericNullContentTemplate}" 
    Width="100"/>
   </xcdg:DataGridControl.Columns>
 </xcdg:DataGridControl> 

I cannot get this to behave correctly.
Instead of return ‘N/A’ for the case of null values, grid ALWAYS displays a zero (0).
The Converter returns ‘N/A’ as expected when it encounters NULL.

I’ve tested the converter independent of the DataGridControl and it works as expected.

What am I doing wrong here? Is there an issue/bug with XCeed?

Thanks,
JohnB

[Author]

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