I cannot underdtand why DataConverter also not able to solve.
Please solve that probkem quick.
Bernd

Here is the example to reproduce it:


private void AddColumns(RadGridView gv, string[] columnNames)
        {
            for (int i = 0; i < columnNames.Length; i++)
            {
                GridViewDataColumn gridViewDataColumn = new GridViewDataColumn();
                gridViewDataColumn.Header = columnNames[i];
                gridViewDataColumn.Width = 100;

                Binding binding = new Binding(String.Format("[{0}]", i));
                binding.Mode = BindingMode.OneWay;

                if (i == 0)
                {
                    // First column shows only the "Name" of the rows as string.
                    binding.Converter = new ObjectToStringConverter();
                    gridViewDataColumn.DataType = typeof (string);
                }
                else
                {
                    // All other columns will show "double" numbers.
                    binding.Converter = new ObjectToDoubleConverter();
                    gridViewDataColumn.DataType = typeof(double);
                }

                gridViewDataColumn.DataMemberBinding = binding; //new Binding(String.Format("[{0}]", i));
               
                gv.Columns.Add(gridViewDataColumn);
            }
        }
    }

    //---- ValueConverter ----------------

    [ValueConversion(typeof(object), typeof(String))]
    public class ObjectToStringConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string text = (string)value;
            return text;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            object obj = value;
            return obj;
        }
    }

    [ValueConversion(typeof(object), typeof(double))]
    public class ObjectToDoubleConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            double number = (double)value;
            return number;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            object obj = value;
            return obj;
        }
    }

You must fix this.
I cannot believe you guys do nit have a work around.
Put it on high level.
Thx Bernd