c# 递归树形菜单
标签:int 模型 建模 end 窗体 derby cli ble item
首先创建模型类Menus
public class Menus
{
//菜单Id
public int Id { get; set; }
//菜单名
public string MenuName { get; set; }
//父节点Id
public int ParentId { get; set; }
}
窗体中放入button跟TreeView控件
声明全局变量
private static List menus;
添加按钮事件
private void button1_Click(object sender, EventArgs e)
{
menus = new List();
menus.Add(new Menus { Id = 1, MenuName = "基础设置", ParentId = 0 });
menus.Add(new Menus { Id = 2, MenuName = "采购管理", ParentId = 0 });
menus.Add(new Menus { Id = 3, MenuName = "系统设置", ParentId = 1 });
menus.Add(new Menus { Id = 4, MenuName = "用户管理", ParentId = 1 });
menus.Add(new Menus { Id = 5, MenuName = "采购订单", ParentId = 2 });
menus.Add(new Menus { Id = 6, MenuName = "采购入库", ParentId = 2 });
menus.Add(new Menus { Id = 7, MenuName = "用户", ParentId = 4 });
menus.Add(new Menus { Id = 8, MenuName = "采购退货", ParentId = 2 });
menus.Add(new Menus { Id = 9, MenuName = "用户组", ParentId = 4 });
menus.Add(new Menus { Id = 10, MenuName = "权限管理", ParentId = 4 });
//首先查出顶级菜单,循环添加
IEnumerable menu = from m in menus where m.ParentId == 0 orderby m.ParentId select m;
foreach (var item in menu)
{
TreeNode node = new TreeNode();
node.Tag = item;
node.Text = item.MenuName;
treeView1.Nodes.Add(node);
//将当前节点作为参数传入子节点
AddChildMenu(node);
}
}
子节点递归实现
private void AddChildMenu(TreeNode node)
{
Menus menu = new Menus();
menu = (Menus)node.Tag; //将父节点转为Model
//查出当前子节点中所有同父节点Id一样的数据
IEnumerable childMenu = from m in menus where m.ParentId == menu.Id orderby m.Id select m;
foreach (var item in childMenu)
{
TreeNode childNode = new TreeNode();
childNode.Tag = item;
childNode.Text = item.MenuName;
node.Nodes.Add(childNode); //添加子节点
AddChildMenu(childNode); //递归调用自己,直到父节点添加所有子节点结束
}
}
效果展示
c# 递归树形菜单
标签:int 模型 建模 end 窗体 derby cli ble item
原文地址:https://www.cnblogs.com/win32pro/p/12874068.html
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