DevExpress的TreeList實現節點上添加自定義右鍵菜單並實現刪除節點功能

場景

Winform控件-DevExpress18下載安裝注冊以及在VS中使用：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100061243

DevExpress的TreeList怎樣設置數據源，從實例入手：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/102548490

實現了樹形結構后，我們要實現在樹形節點上點擊右鍵時彈窗，彈窗確認之后實現將當前節點刪除。

注：

博客主頁：
https://blog.csdn.net/badao_liumang_qizhi
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實現

這里在窗體加載完的事件里綁定Treelist的鼠標點擊事件。

this.treeList2.MouseClick += treeList2_MouseClick;

在事件方法中

private void treeList2_MouseClick(object sender, MouseEventArgs e)
        {
            //獲取當前TreeList對象
            DevExpress.XtraTreeList.TreeList treeList = sender as DevExpress.XtraTreeList.TreeList;
            if (treeList != null && treeList.Selection.Count == 1)
            {
                object idValue = null;
                string strIdValue = String.Empty;
                DataTreeNode nodeData = null;
                //通過TreeList的DataSource屬性獲取所有節點的List
                List<DataTreeNode> datasource = treeList.DataSource as List<DataTreeNode>;
                if (datasource != null)
                {
                    //獲取選中節點的集合中第一個的Id屬性
                    idValue = treeList.Selection[0].GetValue("Id");
                    strIdValue = idValue.ToString();
                    //獲取當前選中節點DataTreeNode對象
                    nodeData = datasource.Where<DataTreeNode>(p => p.Id == strIdValue).FirstOrDefault<DataTreeNode>();
                    if (nodeData != null)
                    {
                        //獲取或設置是否啟用聚焦節點的外觀設置 -啟用整行選中
                            treeList.OptionsSelection.EnableAppearanceFocusedRow = true;                                //啟用整行選中

                            #region 右鍵彈出上下文菜單 - 刪除待比較的文件
                            //如果點擊的是鼠標右鍵
                            if (e.Button == System.Windows.Forms.MouseButtons.Right)
                            {
                                //構建右鍵菜單
                                System.Windows.Forms.ContextMenu ctxMenu = new System.Windows.Forms.ContextMenu();
                                //構建右鍵刪除菜單項
                                System.Windows.Forms.MenuItem mnuDelete = new System.Windows.Forms.MenuItem();
                                mnuDelete.Text = "刪除當前文件";
                                //刪除菜單項點擊事件訂閱
                                mnuDelete.Click += delegate(object s, EventArgs ea)
                                {
                                    //DevExpress的對話框
                                    DialogResult dialogResult = DevExpress.XtraEditors.XtraMessageBox.Show(String.Format("確定要刪除此實驗數據嗎[{0}]？\r\n刪除后無法恢復!", nodeData.Id), "標題", System.Windows.Forms.MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                                    //如果點擊了Yes
                                    if (dialogResult == DialogResult.Yes)
                                    {
                                        try
                                        {
                                            string fileName = String.Empty;

                                            #region 刪除對應的樹節點
                                            //通過設置主鍵ID找到節點node
                                            DevExpress.XtraTreeList.Nodes.TreeListNode selectedNode = treeList.FindNodeByKeyID(nodeData.Id);
                                            if (selectedNode != null)
                                            {
                                                //刪除節點
                                                this.treeList2.Nodes.Remove(selectedNode);
                                            }
                                            #endregion
                                            //禁用整行選中
                                            treeList.OptionsSelection.EnableAppearanceFocusedRow = false;                               
                                        }
                                        catch (Exception ex)
                                        {
                                            ICSharpCode.Core.LoggingService<DataTreeListHelper>.Error("刪除實驗數據異常:" + ex.Message, ex);
                                            DevExpress.XtraEditors.XtraMessageBox.Show("刪除實驗數據異常:" + ex.Message, "標題",MessageBoxButtons.OK, MessageBoxIcon.Error);
                                        }
                                    }
                                };
                                ctxMenu.MenuItems.Add(mnuDelete);
                                ctxMenu.Show(treeList, new System.Drawing.Point(e.X, e.Y));
                            }
                            #endregion
                            return;
                    }
                }
                treeList.OptionsSelection.EnableAppearanceFocusedRow = false;                                //禁用整行選中
            }
        }

 

具體注釋見代碼。