/// <summary>
/// Property changed callback for DataContext property
/// </summary>
private static void OnDataContextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
// Selector has a bug regarding DataContext change and SelectedItem property,
// where if the SelectedItem due to old DataContext is a valid item in ItemsSource
// but the SelectedItem due to new DataContext is not a valid item in ItemsSource,
// the SelectedIndex remains that of old context instead of changing to -1.
// This method is a workaround to that problem, since it is of high impact to DataGrid.
TextBlockComboBox combo = (TextBlockComboBox)d;
bool isLocalValue = (DependencyPropertyHelper.GetValueSource(combo, SelectedItemProperty).BaseValueSource == BaseValueSource.Local);
if (isLocalValue)
{
// Clear the selection and re-apply the binding.
BindingBase binding = BindingOperations.GetBindingBase(combo, SelectedItemProperty);
if (binding != null)
{
combo.ClearValue(SelectedItemProperty);
DataGridPactComboBoxColumn.ApplyBinding(binding, combo, SelectedItemProperty);
}
}
else
{
// Clear the selection by setting the local value
// and re-evaluate the property by clearing the local value.
combo.SelectedItem = null;
combo.ClearValue(SelectedItemProperty);
}
}
private static DataGridColumn CreateColumn(DataGrid gridView, object columnSource)
{
DgColumn col = columnSource as DgColumn;
if (col.Control == "TextBlock")
{
DataGridTextColumn column = new DataGridTextColumn();
column.Binding = new Binding(col.DisplayMember);
return column;
}
else if (col.Control == "PactComboBox")
{
DataGridPactComboBoxColumn column = new DataGridPactComboBoxColumn();
column.Binding = new Binding(col.DisplayMember);
column.FeatureID = Convert.ToInt32(col.Param);
column.SelectedValueBinding = new Binding(col.DisplayMember + "_Key");
return column;
}
else if (col.Control == "DatePicker")
{
DataGridDateColumn column = new DataGridDateColumn();
column.Binding = new Binding(col.DisplayMember);
// column.SelectedValueBinding = new Binding(col.DisplayMember + "_Key");
return column;
}
else//if (col.ColumnType == "TextBox")
{
DataGridTextColumn column = new DataGridTextColumn();
column.Binding = new Binding(col.DisplayMember);
return column;
}
//if (col.ColumnType == "MultiCombo")
//{
// CustDataGridComboBoxColumn combcolumn = new CustDataGridComboBoxColumn();
// combcolumn.Header = col.HeaderText;
// combcolumn.DisplayMemberPath = col.DisplayMember;
// combcolumn.SelectedValuePath = col.ValueMember;
// combcolumn.SelectedValueBinding = new Binding(col.ValueBinding);
// combcolumn.ItemsSource = col.Source;
// combcolumn.Width = col.width;
// for (int i = 0; i < col.Columns.Count; i++)
// {
// GridViewColumn e = new GridViewColumn();
// e.Header = col.Columns[i].HeaderText;
// e.DisplayMemberBinding = new Binding(col.Columns[i].DisplayMember);
// combcolumn.Columns.Add(e);
// }
// return combcolumn;
//}
return null;
}