在运用Devexpress过程中发现一个自己认为是Devexpress控件TreeList的Bug。
涉及到三个事件的执行的理解：BeforeCollapse（展开之前），BeforeFocusNode（获得焦点之前），AfterFocusNode（获得焦点之后）。
正常的理解：BeforeFocusNode执行完在CanFocus是True的情况下就执行AfterFocusNode。
当点击了TreeList节点前面的-号（收缩）【实际触发的是BeforeCollapse这个事件】后，BeforeFocusNode执行完在CanFocus是True的情况下不执行AfterFocusNode。
个人理解，有误请指正！
View Code
1 /// <summary>
2 /// 获得焦点之前
3 /// </summary>
4 /// <param name="sender"></param>
5 /// <param name="e"></param>
6 private void basicTreeView1_BeforeFocusNode(object sender, DevExpress.XtraTreeList.BeforeFocusNodeEventArgs e)
7 {
8 if ( ViewIndex == 1&&!this.InvokeRequired)
9 {
10 if (rightPanel.Controls.Count == 0) return;
11 if (e.Node == basicTreeView1.FocusedNode) return;
12 if ((rightPanel.Controls[0] as IMain).DataChangs())
13 {
14 DialogResult ret = XtraMessageBox.Show(Resources.Multilingual.String[Constant.MultilingualField.DataChangsTip], Resources.Multilingual.String[Constant.MultilingualField.MissageTitle], MessageBoxButtons.YesNo, MessageBoxIcon.Asterisk);
15 if (ret == DialogResult.Yes)
16 {
17 if (((((rightPanel.Controls[0] as UcTabBase).Controls[0] as DevExpress.XtraTab.XtraTabControl).SelectedTabPage).Controls[0] as UcMainInfomationBase).SaveData())
18 ;//(rightPanel.Controls[0] as IMain).Save();
19 else
20 {
21 e.CanFocus = false;
22 }
23 }
24 }
25 }
26 }
27 /// <summary>
28 /// 获得焦点之后
29 /// </summary>
30 /// <param name="sender"></param>
31 /// <param name="e"></param>
32 private void basicTreeView1_AfterFocusNode(object sender, DevExpress.XtraTreeList.NodeEventArgs e)
33 {
34 if (DisplayDataList)
35 SetRzGraphParameter(e.Node);
36 if (ViewIndex == 1)
37 {
38 MD_ConfigurationTree treeNode = NodeConversionModel(e.Node);
39 DataRow dr = (basicTreeView1.GetDataRecordByNode(e.Node) as DataRowView).Row;
40 DataSet dsData = dr.Table.DataSet.Clone();
41 dsData.Tables[0].ImportRow(dr);
42 dsData.AcceptChanges();
43 SetConfigurationMode(treeNode, dsData);
44
45 if (DisplayDataList)
46 RefreshGraData();//刷新数据
47 }
48 }
49 /// <summary>
50 /// 收缩之前
51 /// </summary>
52 /// <param name="sender"></param>
53 /// <param name="e"></param>
54 private void basicTreeView1_BeforeCollapse(object sender, DevExpress.XtraTreeList.BeforeCollapseEventArgs e)
55 {
56 if (IsCollapseHigherNode(e.Node,basicTreeView1.FocusedNode))
57 {
58 basicTreeView1.FocusedNode = e.Node;
59 if(!basicTreeView1.HasFocus)
60 e.CanCollapse = false;
61 }
62 }