//當前選中哪一列: dataGrid.CurrentCell.Column.DisplayIndex;
//返回綁定的類型(dataGrid.DataContext的類型): dataGrid.Items[dataGridTable.SelectedIndex].GetType();
//返回綁定的類型(dataGrid.DataContext的類型): dataGrid.CurrentCell.Item
//轉化爲DataGridTemplateColumn:DataGridTemplateColumn templeColumn = dataGrid.Columns[1] as DataGridTemplateColumn;
//獲取Password: FrameworkElement element = templeColumn.GetCellContent(dataGrid.CurrentCell.Item); PasswordBox password = templeColumn.CellTemplate.FindName("password1", element) as PasswordBox;