如何设置我的WPF数据网格以对多个列进行排序,类似于具有两个可排序的列,单击第一列的标题进行主要排序,然后按SHIFT单击第二列的标题进行二次排序。我希望当用户点击第一列的标题时自动发生多列排序,而不必在第二列标题上单击SHIFT。有没有办法在xaml中完全执行此操作?如果不是,我怎么能在后面的代码中执行此操作?目前使用VB.Net但如果你有一个C#片段是可以接受的。谢谢!
答案 0 :(得分:20)
您可以通过添加 System.ComponentModel 命名空间来完成此操作:
xmlns:scm="clr-namespace:System.ComponentModel;assembly=WindowsBase"
然后在 CollectionViewSource XAML内添加新的 SortDescriptions ,如下所示:
<CollectionViewSource … >
<CollectionViewSource.SortDescriptions>
<scm:SortDescription PropertyName="Column1"/>
<scm:SortDescription PropertyName="Column2"/>
</CollectionViewSource.SortDescriptions>
</CollectionViewSource>
这将对column1,column2上的datagrid进行排序。
修改强>
使用C#代码执行此操作非常简单:
private void btnSort_Click(object sender, RoutedEventArgs e)
{
System.Windows.Data.CollectionViewSource myViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("The_ViewSource_Name")));
myViewSource.SortDescriptions.Add(new SortDescription("Column1", ListSortDirection.Ascending));
myViewSource.SortDescriptions.Add(new SortDescription("Column2", ListSortDirection.Ascending));
}
<强> EDIT2:强>
可以使用解决方法来捕获列标题鼠标左键单击事件,并阻止网格对该列进行排序,如下所示:
将此代码添加到网格中 PreviewMouseLeftButtonUp事件:
private void myDataGrid_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
DependencyObject dep = (DependencyObject)e.OriginalSource;
while ((dep != null) &&
!(dep is DataGridCell) &&
!(dep is DataGridColumnHeader))
{
dep = VisualTreeHelper.GetParent(dep);
}
if (dep == null)
return;
if (dep is DataGridColumnHeader)
{
DataGridColumnHeader columnHeader = dep as DataGridColumnHeader;
// check if this is the wanted column
if (columnHeader.Column.Header.ToString() == "The_Wanted_Column_Title")
{
System.Windows.Data.CollectionViewSource myViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("myViewSource")));
myViewSource.SortDescriptions.Clear();
myViewSource.SortDescriptions.Add(new SortDescription("Column1", ListSortDirection.Ascending));
myViewSource.SortDescriptions.Add(new SortDescription("Column2", ListSortDirection.Ascending));
}
else
{
//usort the grid on clicking on any other columns, or maybe do another sort combination
System.Windows.Data.CollectionViewSource myViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("myViewSource")));
myViewSource.SortDescriptions.Clear();
}
}
}
您可以修改和扩展此代码以满足您的要求。
答案 1 :(得分:13)
我希望这会对别人有所帮助。我的解决方案保留了默认排序功能,并允许对多列进行排序。
在数据网格上放置一个排序事件
<DataGrid x:Name="dataGridName" Sorting="dataGridName_Sorting">
现在在你的代码背后
private void dataGridName_Sorting(object sender, DataGridSortingEventArgs e)
{
var dgSender = (DataGrid) sender;
var cView = CollectionViewSource.GetDefaultView(dgSender.ItemsSource);
//Alternate between ascending/descending if the same column is clicked
ListSortDirection direction = ListSortDirection.Ascending;
if (cView.SortDescriptions.FirstOrDefault().PropertyName == e.Column.SortMemberPath)
direction = cView.SortDescriptions.FirstOrDefault().Direction == ListSortDirection.Descending ? ListSortDirection.Ascending : ListSortDirection.Descending;
cView.SortDescriptions.Clear();
AddSortColumn((DataGrid)sender, e.Column.SortMemberPath, direction);
//To this point the default sort functionality is implemented
//Now check the wanted columns and add multiple sort
if (e.Column.SortMemberPath == "WantedColumn")
{
AddSortColumn((DataGrid)sender, "SecondColumn", direction);
}
e.Handled = true;
}
private void AddSortColumn(DataGrid sender, string sortColumn, ListSortDirection direction)
{
var cView = CollectionViewSource.GetDefaultView(sender.ItemsSource);
cView.SortDescriptions.Add(new SortDescription(sortColumn, direction));
//Add the sort arrow on the DataGridColumn
foreach (var col in sender.Columns.Where(x => x.SortMemberPath == sortColumn))
{
col.SortDirection = direction;
}
}
DataGridColumn上的sortDirection允许在网格上显示箭头。