TreeList 的 增加、删除节点—–DevExpress

private void FrmDictionaryManaged_Load(object sender, EventArgs e){// treeList1.DataSource= CreateDataTable();treeList2.DataSource = CreateTreeList();// 绑定TreeList控件到数据源treeList1.DataSource = GetData();treeList1.KeyFieldName = "ID";treeList1.ParentFieldName = "ParentID"; this.treeList1.Columns[1].Caption = @"字典测试";//树的名称// 设置列为只读treeList1.Columns.Cast().ToList().ForEach(column =>{column.OptionsColumn.ReadOnly = true;column.OptionsColumn.AllowEdit = false;});treeList1.Columns["Id"].Visible = false;} private BindingList GetData(){// 此属性设为true 每个节点前会自动增加一个check框// treeList1.OptionsView.ShowCheckBoxes = true;// 此属性设为true 点击复选框时，可设置为半选状态 ??效果还未呈现出来// treeList1.OptionsBehavior.AllowIndeterminateCheckState = true;// 这里返回一个包含节点数据的BindingList// 你可以根据实际情况替换为你自己的数据源BindingList data = new BindingList{new TreeNode { Id = 1, Name = "性别" },// 其他节点...};return data;}public class TreeNode{public int Id { get; set; }public string Name { get; set; }}public DataTable CreateDataTable(){DataTable dt = new DataTable();//此属性设为true 每个节点前会自动增加一个check框treeList1.OptionsView.ShowCheckBoxes = true;//此属性设为true 点击复选框时，可设置为半选状态 ??效果还未呈现出来treeList1.OptionsBehavior.AllowIndeterminateCheckState = true;dt.Columns.Add("ID");dt.Columns.Add("PARENTID");dt.Columns.Add("NAME");//为此表增加数据DataRow dr1 = dt.NewRow();dr1["ID"] = 1;dr1["PARENTID"] = 1;dr1["NAME"] = "类目1";dt.Rows.Add(dr1);DataRow dr2 = dt.NewRow();dr2["ID"] = 2;dr2["PARENTID"] = 1;dr2["NAME"] = "商品1";dt.Rows.Add(dr2);DataRow dr3 = dt.NewRow();dr3["ID"] = 3;dr3["PARENTID"] = 1;dr3["NAME"] = "商品2";dt.Rows.Add(dr3);DataRow dr31 = dt.NewRow();dr31["ID"] = 7;dr31["PARENTID"] = 1;dr31["NAME"] = "类目3";dt.Rows.Add(dr31);DataRow dr4 = dt.NewRow();dr4["ID"] = 4;dr4["PARENTID"] = 4;dr4["NAME"] = "类目2";dt.Rows.Add(dr4);DataRow dr5 = dt.NewRow();dr5["ID"] = 5;dr5["PARENTID"] = 4;dr5["NAME"] = "商品1";dt.Rows.Add(dr5);DataRow dr6 = dt.NewRow();dr6["ID"] = 6;dr6["PARENTID"] = 4;dr6["NAME"] = "商品2";dt.Rows.Add(dr6);this.treeList1.DataSource = dt;this.treeList1.KeyFieldName = "ID";this.treeList1.ParentFieldName = "PARENTID";this.treeList1.Columns[0].Caption = "测试";//树的名称return dt;}public DataTable CreateTreeList(){DataTable dt = new DataTable();#region TreeList属性设置//节点前显示复选框this.treeList2.OptionsView.ShowCheckBoxes = true;//此属性设为true 点击复选框时，可设置为半选状态treeList1.OptionsBehavior.AllowIndeterminateCheckState = true;#endregion#region 在TreeList中增加列//用于标识当前节点和当前节点的父节点dt.Columns.Add("ID");dt.Columns.Add("PARENTID");//第一列数据的名称dt.Columns.Add("NAME");//第二列（节点编码的名称）dt.Columns.Add("CODE");//第三列（其他）dt.Columns.Add("OTHERS");#endregion#region 添加数据//第一行数据DataRow dr1 = dt.NewRow();dr1["ID"] = 1;dr1["PARENTID"] = DBNull.Value;dr1["NAME"] = "根节点1";dr1["CODE"] = "根节点1编码";dr1["OTHERS"] = "根节点1的其他信息";dt.Rows.Add(dr1);//第二行数据DataRow dr2 = dt.NewRow();dr2["ID"] = 2;dr2["PARENTID"] = 1;dr2["NAME"] = "当前节点2";dr2["CODE"] = "当前节点2编码";dr2["OTHERS"] = "当前节点2的其他信息";dt.Rows.Add(dr2);//第三行数据DataRow dr3 = dt.NewRow();dr3["ID"] = 3;dr3["PARENTID"] = 1;dr3["NAME"] = "当前节点3";dr3["CODE"] = "当前节点3编码";dr3["OTHERS"] = "当前节点3的其他信息";dt.Rows.Add(dr3);//第四行数据DataRow dr4 = dt.NewRow();dr4["ID"] = 4;dr4["PARENTID"] = DBNull.Value;dr4["NAME"] = "根节点2";dr4["CODE"] = "根节点2编码";dr4["OTHERS"] = "根节点2的其他信息";dt.Rows.Add(dr4);//第五行数据DataRow dr5 = dt.NewRow();dr5["ID"] = 5;dr5["PARENTID"] = 4;dr5["NAME"] = "当前节点5";dr5["CODE"] = "当前节点5编码";dr5["OTHERS"] = "当前节点5的其他信息";dt.Rows.Add(dr5);//第六行数据DataRow dr6 = dt.NewRow();dr6["ID"] = 6;dr6["PARENTID"] = 4;dr6["NAME"] = "当前节点6";dr6["CODE"] = "当前节点6编码";dr6["OTHERS"] = "当前节点6的其他信息";dt.Rows.Add(dr6);#endregion#region 绑定数据源并设置列名this.treeList2.DataSource = dt;this.treeList2.KeyFieldName = "ID";this.treeList2.ParentFieldName = "PARENTID";//这句一定要写在上面两句的下面this.treeList2.Columns[0].Caption = "节点名称";this.treeList2.Columns[1].Caption = "节点编码";this.treeList2.Columns[2].Caption = "节点其他信息";#endregionreturn dt;}private void 添加ToolStripMenuItem_Click(object sender, EventArgs e){FrmDictionaryTreeEdit frm = new FrmDictionaryTreeEdit();frm.ShowDialog();if (frm.DialogResult != DialogResult.OK)return;// 创建新节点var newNode = new TreeNode { Id = GetNewNodeId(), Name = frm.TypeName };// 获取选中的节点TreeListNode selectedNode = treeList1.FocusedNode;//if (selectedNode == null)//{// 如果没有选中节点，添加到根节点treeList1.AppendNode(new object[] { newNode.Id, newNode.Name }, null);//}//else//{//// 如果有选中节点，添加为选中节点的子节点//treeList1.AppendNode(new object[] { newNode.Id, newNode.Name }, selectedNode);//selectedNode.Expanded = true; // 展开选中节点以显示子节点//}}private void 修改ToolStripMenuItem_Click(object sender, EventArgs e){TreeListNode selectedNode = treeList1.FocusedNode;if (selectedNode != null){FrmDictionaryTreeEdit frm = new FrmDictionaryTreeEdit();// 获取选中节点的数据int nodeId = Convert.ToInt32(selectedNode.GetValue("ID"));frm.TypeName = selectedNode.GetValue("Name").ToString();frm.ShowDialog();if (frm.DialogResult != DialogResult.OK)return;string editedName = frm.TypeName;// 更新TreeList中的节点数据selectedNode.SetValue("Name", editedName);}}private void 删除ToolStripMenuItem_Click(object sender, EventArgs e){TreeListNode selectedNode = treeList1.FocusedNode;if (selectedNode != null){// 删除选中的节点treeList1.DeleteNode(selectedNode);}}private int GetNewNodeId(){// 这里可以根据需要生成新节点的ID，确保其唯一性// 例如，你可以查询已存在的节点ID的最大值，然后加1int maxId = (from TreeListNode node in treeList1.Nodes select Convert.ToInt32(node.GetValue("ID"))).Concat(new[] { -1 }).Max();return maxId + 1;}

控件：TreeList ，GirdControl,ContextMenuStrip