将一个DataGridTextColumn添加到多个数据网格

Question

我有三个datagrids构建在三个相同类型的不同ObservableCollections上：

ObservableCollection<MachineOrder> preactive;
ObservableCollection<MachineOrder> active;
ObservableCollection<MachineOrder> inProduction;

MachineOrder包含我想以编程方式添加到网格的特征字典。

我是这样做的：

foreach (StringWrapper characteristic in viewModel.Characteristics)
            {

                DataGridTextColumn column = new DataGridTextColumn();
                column.Header = characteristic.Value;
                column.Width = new DataGridLength(0, DataGridLengthUnitType.Auto);

                Binding binding = new Binding();
                binding.FallbackValue = "kein Wert";
                binding.Path = new PropertyPath("Charakteristics[" + characteristic.Value + "]");

                column.Binding = binding;


                if (dgPreactive.Columns.FirstOrDefault(x => x.Header == column.Header) == null)
                    dgPreactive.Columns.Add(column);

                if (dgActive.Columns.FirstOrDefault(x => x.Header == column.Header) == null)
                    dgActive.Columns.Add(column);

                if (dgInProduction.Columns.FirstOrDefault(x => x.Header == column.Header) == null)
                    dgInProduction.Columns.Add(column);


                if (viewModel.AddedColumns == null)
                        viewModel.AddedColumns = new ObservableCollection<DataGridColumn>();

                if (viewModel.AddedColumns.FirstOrDefault(x => x.Header == column.Header) == null)
                    viewModel.AddedColumns.Add(column);

            }

viewModel.Characteristics包含我想要显示的Dictionaryitems。

这对第一个网格很有用，但在dgActive.Columns.Add(column)上我得到以下参数异常：

“带有标题{0}的DataGridColumn已经存在于DataGrid的Columns集合中.DataGrids不能共享列，也不能包含重复的列实例。”