/// <summary>
/// 处理行单击。
/// </summary>
/// <param name="info"></param>
private void ProcessItemClick(TreeListHitTestInfo info)
{
var item = (TreeListItem)((VirtualTreeListItem)info.Element).Item;
//按着ctrol切换选中状态
if (_controlPressed)
{
SelectItem(item, !item.Selected, false);
}
else if (_shiftPressed && _lastRowIndex != -1)
{
if (_lastRowIndex > _virMgr.Items.Count - 1)
{
return;
}
for (var i = SelectedItems.Count - 1; i >= 0; i--)
{
SelectedItems[i].SetSelected(false);
}
SelectedItems.InternalClear();
Invalidate(_bound.ItemBound);
var start = _lastRowIndex;
var end = item.Index;
if (start > end)
{
start = end;
end = _lastRowIndex;
}
for (var i = start; i <= end; i++)
{
if (!(_virMgr.Items[i].Item is TreeListItem t))
{
continue;
}
t.SetSelected(true);
SelectedItems.InternalAdd(t);
}
Invalidate();
RaiseItemSelectionChangedEvent();
}
//选中且不是多选时，只触发单击事件
else if (item.Selected && SelectedItems.Count == 1)
{
RaiseItemClickEvent(item);
return;
}
//选中当前行
else
{
SelectItem(item, true);
HideEditor();
_lastRowIndex = item.Index;
}
RaiseItemClickEvent(item);
}
/// <summary>
/// 将一个数据对象绑定到 <see cref="TreeList"/>
/// </summary>
/// <param name="dataSource"></param>
public void DataBind(object dataSource)
{
this.dataSource = dataSource;
BeginUpdate();
var selectKeyValues = GetSelectedItems();
Items.Clear();
SelectedItems.InternalClear();
CheckedItems.InternalClear();
if (dataSource == null)
{
EndUpdate();
return;
}
if (dataSource is DataSet)
{
var ds = (DataSet)dataSource;
if (ds.Tables.Count > 0)
{
BindDataTable(ds.Tables[0]);
}
}
if (dataSource is DataTable)
{
BindDataTable((DataTable)dataSource);
}
else if (dataSource is IEnumerable)
{
BindEnumerable((IEnumerable)dataSource);
}
EndUpdate();
ReSelectItems(selectKeyValues);
}
