I read your blog posting „Binding a Silverlight DataGrid to dynamic data Part 2 – editable data and INotifyPropertyChanged”.
Is it possible to bind some textboxes too, with a two-way binding to the datasource. I tried it below but it did not work.
public Page()
{
InitializeComponent();

// generate some dummy data
Random rand = new Random();
for (int i = 0; i < 200; i++)
{
Row row = new Row();
row["Forename"] = s_names[rand.Next(s_names.Length)];
row["Surname"] = s_surnames[rand.Next(s_surnames.Length)];
row["Age"] = rand.Next(40) + 10;
row["Shoesize"] = rand.Next(10) + 5;
_rows.Add(row);
}

Binding binding = new Binding("Shoesize");
binding.Mode = BindingMode.TwoWay;
binding.Converter = new RowIndexConverter();
binding.ConverterParameter = "Shoesize";
// binding.Source = _rows;
textBox1.SetBinding(TextBox.TextProperty, binding);

// bind to our DataGrid
_dataGrid.ItemsSource = _rows;
}
}

Maybe you can give me a hint.

Best regards
André

I just want to thank you this great post. You helped me a lot. This is the best datagrid description that I’ve ever seen. Thanks again.

Marcell

I have not tested editing
Sample code below:

ObservableCollection GridRowsWithDynamicColumns = new ObservableCollection();
for (int i = 1; i < 10; i++)
{
GridRowsWithDynamicColumns.Add(new GridRowWithDynamicColumns(i));
}

DataGridTextColumn textColumn;
Binding myBinding;

// can mix a static column with dynamic
textColumn = new DataGridTextColumn();
myBinding = new Binding("RowID");
textColumn.Header = "RowID";
textColumn.Binding = myBinding;
textColumn.IsReadOnly = true;
DataGrid4.Columns.Add(textColumn);
DataGrid4.FrozenColumnCount = 1;

GridRowWithDynamicColumns gridRowWithDynamicColumns = new GridRowWithDynamicColumns(0);
//gridRowWithDynamicColumns is just to get .GridDynamicColumns
for (int i = 0; i < gridRowWithDynamicColumns.GridDynamicColumns.Count; i++)
{
textColumn = new DataGridTextColumn();
// the constructor is Path
myBinding = new Binding("GridDynamicColumns[" + i.ToString() + "].DisplayValue");
// myBinding.Converter = new RowIndexConverter2(); converter not required
textColumn.Header = gridRowWithDynamicColumns.GridDynamicColumns[i].ColumnHeader;
textColumn.Binding = myBinding;
textColumn.IsReadOnly = true;
DataGrid4.Columns.Add(textColumn);
}

DataGrid4.ItemsSource = GridRowsWithDynamicColumns;

…

public class GridRowWithDynamicColumns
{
private Int32 rowID;
private List gridDynamicColumns = new List();

public string RowID
{
get { return rowID.ToString(); }
}

public List GridDynamicColumns
{
get { return gridDynamicColumns; }
}

public GridRowWithDynamicColumns(Int32 RowID)
{
rowID = RowID;
gridDynamicColumns.Add(new GridDynamicColumn(rowID, “ColumnA”));
gridDynamicColumns.Add(new GridDynamicColumn(rowID, “ColumnB”));
gridDynamicColumns.Add(new GridDynamicColumn(rowID, “ColumnC”));
gridDynamicColumns.Add(new GridDynamicColumn(rowID, “ColumnD”));
// Debug.WriteLine(gridDynamicColumns[0].DisplayValue);
}
}

public class GridDynamicColumn
{
private string columnHeader;
private Int32 rowID;

public GridDynamicColumn(Int32 RowID, string ColumnHeader)
{
rowID = RowID;
columnHeader = ColumnHeader;
}

public string DisplayValue
{
get
{
return rowID.ToString() + ” ” + columnHeader;
// this could be much more complex such as a call to database
// any parameters passed in the constructor are available
// or could implement a mutator and pass DisplayValue in the constructor
}
}

public Int32 RowID
{
get
{
return rowID;
}
}

public string ColumnHeader
{
get
{
return columnHeader;
}
}
}

public object Convert(object value, Type targetType, object parameter, …)
{
Debug.WriteLine(value.GetType());
string index = parameter as string;
if (value.GetType() == typeof(Row))
{
Debug.WriteLine(“Row”);
Row row = value as Row;
return row[index];
}
else if (value.GetType() == typeof(PropertyValueChange))
{
Debug.WriteLine(“PropertyValueChange”);
PropertyValueChange pvc = value as PropertyValueChange;
return pvc.Value;
}
else
{
throw new NotImplementedException();
}
}

I have not implemented or tested sorting in WPF .NET 4.0

http://mtaulty.com/CommunityServer/blogs/mike_taultys_blog/archive/2009/11/18/silverlight-4-rough-notes-binding.aspx

Colin E.