Get all cells in datagrid - wpf

Question

Is there a way to get an iteratable collection of all the cells in a DataGrid regardless of whether they are selected or not

Answer 1

If you mean DataGridCells you could use Vincent Sibals helper functions to iterate over all rows DataGrid.Items and columns DataGrid.Columns.
public DataGridCell GetCell(int row, int column)
{
DataGridRow rowContainer = GetRow(row);
if (rowContainer != null)
{
DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);
// try to get the cell but it may possibly be virtualized
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
if (cell == null)
{
// now try to bring into view and retreive the cell
DataGrid_Standard.ScrollIntoView(rowContainer, DataGrid_Standard.Columns[column]);
cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
}
return cell;
}
return null;
}
public DataGridRow GetRow(int index)
{
DataGridRow row = (DataGridRow)DataGrid_Standard.ItemContainerGenerator.ContainerFromIndex(index);
if (row == null)
{
// may be virtualized, bring into view and try again
DataGrid_Standard.ScrollIntoView(DataGrid_Standard.Items[index]);
row = (DataGridRow)DataGrid_Standard.ItemContainerGenerator.ContainerFromIndex(index);
}
return row;
}
Edit
If grid is your DataGrid you get a list of all DataGridCells like this:
List<DataGridCell> allCellList = new List<DataGridCell>();
for (int i = 0; i < grid.Items.Count; i++)
{
for (int j = 0; j < grid.Columns.Count; j++)
{
allCellList.Add(grid.GetCell(i, j));
}
}

Answer 2

For the sake of convenience (not necessarily performance), you can populate your data (including all cells from all column and rows) from your DataGrid to a single DataTable, which provides functions to help manipulate your data such as iteration, filtering, sorting etc.
// Populate a DataGrid to a DataTable
DataTable dt;
DataView dv = (DataView) myDataGrid.DataSource;
dt = dv.Table.DataSet.Tables[0];
You can subsequently convert any of a specific column to a collection or list using generics in as short as one line of code. See how-do-you-convert-a-datatable-into-a-generic-list:
List<DataRow> myList = dt.Rows.Cast<DataRow>().ToList();
It saves you from writing loops.

Answer 3

To fix the error thrown by the line...
DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>
(rowContainer);
Add this routine:
private T GetVisualChild<T>(DataGridRow rowContainer)
{
throw new NotImplementedException();
}