Question

I have a grid that needs to hide certain columns right after its data-bound. Here’s my code so far:

private IEnumerable<DataGridColumn> GetDataGridColumns(DataGrid grid)
{
    var itemsSource = grid.ItemsSource as IEnumerable;

    if (null == itemsSource) yield return null;

    foreach (var item in itemsSource)
    {
        var column = grid.ItemContainerGenerator.ContainerFromItem(item) as DataGridColumn;
        if (null != column) yield return column;
    }
}

private void LoadData()
{
    GridMain.ItemsSource = (new VTAEEntities()).OrganizationInterfaces.ToList();

    foreach (DataGridColumn Column in GetDataGridColumns(GridMain))
    {
        // Hiding columns
        if (Column.Header as String != null) {
            String tempHeader = Column.Header as String;

            String[] unrequiredColumns = new String[] { 
                "Instances",
                "Interfaces",
                "Organizations",
                "RegisteredCallerOnly"
            };

            if (unrequiredColumns.Contains(tempHeader)) {
                Column.Visibility = System.Windows.Visibility.Hidden;
            }
        }

        // Read-only columns
        if (Column.Header as String != null)
        {
            String tempHeader = Column.Header as String;

            String[] unrequiredColumns = new String[] { 
                "InstanceId",
                "InterfaceId",
                "OrganizationId"
            };

            if (unrequiredColumns.Contains(tempHeader))
            {
                Column.IsReadOnly = true;
            }
        }
    }
}

All the unwanted columns + the columns I want to be read only are all there. Upon debugging, I realize that the GridMain.Columns is always 0 count. How do I iterate through the columns in an ItemSource?

Answer 1

If you want to hide column than you can make use of

AutoGeneratingColumn

event of wpf grid that will might work for you to hide column.

private void DataGrid_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
      DataGridBoundColumn col = e.Column as DataGridBoundColumn;
     //set visiblity by doing the code you wnat ..i.logic to hide column
      if (col.Header.ToString().ToLower() == "id") 
        { 
            col.Visibility = System.Windows.Visibility.Hidden;
        }
}