c#，winform，webform，treeview，无限级自动生成

表16 AuthorizeMenuInfo权限菜单表

列名	类型	大小	说明
MenuID	Int	4	菜单ID
MenuName	Varchar	50	菜单名称
ParentID	Int	4	为此菜单的父菜单ID如果是顶级菜单则为0
FormName	Varchar	50	为单击菜单所要显示的窗体类名如果是还有下级菜单的则不要写。
IsModule	Varchar	1	是否还有子菜单，1有，0没有
Level	Int	4	层数
Remark	Varchar	200	备注

存储过程

/*
查询构造treeview所需信息
*/
create procedure GetTreeViewAuthorize
as
select MenuID,MenuName,ParentID from AuthorizeMenuInfo
go

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/*
根据父节点ID查找子节点信息
*/
create procedure GetAuthorizeByParentID
@ParentID int
as
select * from AuthorizeMenuInfo where ParentID=@ParentID
go

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/**//// <summary>
        /// 获取构建无限级treeview所需的菜单id，菜单名称，父菜单id
        /// 返回datatable
        /// </summary>
        /// <returns>无限级treeview所需datatable</returns>
        public DataTable GetTreeViewAuthorize()
        {
            DataTable dt = new DataTable();

            SqlConnection conn = new SqlConnection(connectionString);
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = conn;
            cmd.CommandText = "GetTreeViewAuthorize";
            cmd.CommandType = CommandType.StoredProcedure;

            try
            {
                conn.Open();
                using (SqlDataReader reader = cmd.ExecuteReader())
                {
                    if(reader!=null)

                        dt.Load(reader);
                  
                }
            }
            catch
            {
                throw;
            }
            finally
            {
                conn.Close();
            }
            return dt;
        }

/**//// <summary>
        /// 根据父节点ID查找子节点信息
        /// </summary>
        /// <param name="parentID">父节点ID</param>
        /// <returns>子节点信息</returns>
        public DataTable GetAuthorizeByParentID(int parentID)
        {
            DataTable dt = new DataTable();

            SqlConnection conn = new SqlConnection(connectionString);
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = conn;
            cmd.CommandText = "GetAuthorizeByParentID";
            cmd.Parameters.AddWithValue("@ParentID", parentID);
            cmd.CommandType = CommandType.StoredProcedure;

            try
            {
                conn.Open();
                using (SqlDataReader reader = cmd.ExecuteReader())
                {
                    if (reader != null)

                        dt.Load(reader);

                }
            }
            catch
            {
                throw;
            }
            finally
            {
                conn.Close();
            }
            return dt;

        }

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/**//// <summary>
/// 构造权限treeview
/// </summary>
        private void fill_tvAuthList()
        {
            DataTable dt = new DataTable();
            BLLAuthorize bllAuthorize = new BLLAuthorize();
            dt = bllAuthorize.GetTreeViewAuthorize();
            DataRow[] rows = dt.Select("[ParentID]=0");
            for(int i=0;i<rows.GetUpperBound(0);i++)
            {
                TreeNode treeNode = new TreeNode();
                treeNode.Name = rows[i]["MenuID"].ToString();
                treeNode.Text = rows[i]["MenuName"].ToString();
               
                DataRow[] rows1 = dt.Select("[ParentID]=" + Convert.ToInt32(rows[i]["MenuID"]));
                if (rows1.GetUpperBound(0) > -1)
                {
                    foreach (DataRow row in rows1)
                    {
                        TreeNode node = new TreeNode();
                        node.Name = row["MenuID"].ToString();
                        node.Text = row["MenuName"].ToString();
                        treeNode.Nodes.Add(node);
                    }
                }
tvAuthList.Nodes.Add(treeNode);
            }
        }
        private void fill_tvAuthListNode(TreeNode treeNode)
        {
           // TreeNode[]nodes=new TreeNode[];
            DataTable dt = new DataTable();
            BLLAuthorize bllAuthorize = new BLLAuthorize();
            dt = bllAuthorize.GetAuthorizeByParentID(Convert.ToInt32(treeNode.Name));

            for (int i = 0; i < dt.Rows.Count; i++)
            {
                TreeNode tNode = new TreeNode();
                tNode.Name = dt.Rows[i]["MenuID"].ToString();
                tNode.Text = dt.Rows[i]["MenuName"].ToString();
                treeNode.Nodes.Add(tNode);
            }
        }
        private void AddSysRoleForm_Load(object sender, EventArgs e)
        {
            fill_tvAuthList();
        }

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