WPF DataGrid：如何以编程方式清除选择？
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WPF DataGrid: How to clear selection programmatically?
提问by newman
How would one just clear it?
一个人怎么会清除它？
There is UnselectAllor UnselectAllCellsmethods, but they don't work. Also, setting SelectedItem = nullor SelectedIndex = -1does not work either.
有UnselectAll或UnselectAllCells方法，但它们不起作用。此外，设置SelectedItem = null或SelectedIndex = -1也不起作用。
Also I do not want to completely disable the selection, I just want to clear the current selection (if any) and set a new selection programmatically.
此外，我不想完全禁用选择，我只想清除当前选择（如果有）并以编程方式设置新选择。
回答by Evalds Urtans
dataGrid.UnselectAll()
For rows mode
对于行模式
回答by vortexwolf
To clear current selection, you can use this code (as you see it is different whether the mode is Single or Extended)
要清除当前选择，您可以使用此代码（如您所见，模式是 Single 还是 Extended 是不同的）
if(this.dataGrid1.SelectionUnit != DataGridSelectionUnit.FullRow)
this.dataGrid1.SelectedCells.Clear();
if (this.dataGrid1.SelectionMode != DataGridSelectionMode.Single) //if the Extended mode
this.dataGrid1.SelectedItems.Clear();
else
this.dataGrid1.SelectedItem = null;
To select new items programmatically, use this code:
要以编程方式选择新项目，请使用以下代码：
if (this.dataGrid1.SelectionMode != DataGridSelectionMode.Single)
{ //for example, select first and third items
var firstItem = this.dataGrid1.ItemsSource.OfType<object>().FirstOrDefault();
var thirdItem = this.dataGrid1.ItemsSource.OfType<object>().Skip(2).FirstOrDefault();
if(firstItem != null)
this.dataGrid1.SelectedItems.Add(firstItem);
if (thirdItem != null)
this.dataGrid1.SelectedItems.Add(thirdItem);
}
else
this.dataGrid1.SelectedItem = this.dataGrid1.ItemsSource.OfType<object>().FirstOrDefault(); //the first item
回答by Ken Budris
Disabling and reenabling the DataGrid worked for me.
禁用和重新启用 DataGrid 对我有用。
回答by Dunc
DataGrid.UnselectAllCells()
It works for me.
这个对我有用。
