Question

我有一些代码可以监听数据网格的“排序”事件，以便能够添加自定义排序器...

我在加载数据网格时添加了它。

grid.Sorting += (sender, args) =>
            {
                var column = (DataGridCustomTextColumn) args.Column;



                //i do some custom checking based on column to get the right comparer
                //i have different comparers for different columns. I also handle the sort direction
                //in my comparer

                // prevent the built-in sort from sorting
                args.Handled = true;

                var direction = (column.SortDirection != ListSortDirection.Ascending)
                    ? ListSortDirection.Ascending
                    : ListSortDirection.Descending;

                //set the sort order on the column
                column.SortDirection = direction;

                //use a ListCollectionView to do the sort.
                var lcv = (ListCollectionView) CollectionViewSource.GetDefaultView(grid.ItemsSource);

                //this is my custom sorter it just derives from IComparer and has a few properties
                //you could just apply the comparer but i needed to do a few extra bits and pieces
                var comparer = new DataGridCommonSort(column.RealDataType, column.SortMemberPath, direction);

                //apply the sort
                lcv.CustomSort = comparer;

            };

问题在于，仅当我单击columnheader时才调用此处理程序。但是我需要一种方法来初始化触发数据被排序的事件

有什么想法吗？我尝试了类似的方法：

ICollectionView dataView = CollectionViewSource.GetDefaultView(dataGrid.ItemsSource);
            dataView.SortDescriptions.Clear();
            dataView.SortDescriptions.Add(new SortDescription(c.SortMemberPath, ListSortDirection.Descending));
            dataView.Refresh();

但这对我不起作用。

Answer 1

您可以将事件处理程序定义为（非匿名）方法：

private void grid_Sorting(object sender, DataGridSortingEventArgs args)
{
    //same code as before...
}

...，并在设置ItemsSource属性后直接调用它：

grid_Sorting(grid, new DataGridSortingEventArgs(grid.Columns[0])); //sort by the first column

代码中的WPF DataGrid火灾排序事件

1 个答案: