无限级分类(非递归算法/存储过程版/GUID主键)完整数据库示例_(4)显示记录

显示记录，其实再简单不过了，一条sql语句即可

Select * From T_Class order By F_RootID,F_Orders

下面给出一个ASPX(C#版)的示例

Database.ConnectionString = "Data Source=127.0.0.1;Initial Catalog=cntvs;Persist Security Info=True;User ID=sa;Password=3power";

        string _strSql = "Select * from T_Class order By F_rootId,F_Orders";
        SqlConnection conn = Database.GetConn();

 //插入几个演示用的节点
        Database.ExecuteNonQuery(conn, CommandType.Text, "truncate table T_Class");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx 'c12fe245-75ec-4b28-82e1-99e501672f41','product','00000000-0000-0000-0000-000000000000','A',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx '0c630080-51b0-4b92-bd6c-99e50167d8a5','product','c12fe245-75ec-4b28-82e1-99e501672f41','A1',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx '9eeda546-927e-4b2a-a4e8-99e501681676','product','0c630080-51b0-4b92-bd6c-99e50167d8a5','A11',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx 'bc36649c-736a-467f-b2f1-99e501687083','product','0c630080-51b0-4b92-bd6c-99e50167d8a5','A12',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx '2b975d64-27c7-4759-b475-99e50168d622','product','c12fe245-75ec-4b28-82e1-99e501672f41','A2',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx 'b2703d81-60c8-4e08-8ed4-99e50169376b','product','2b975d64-27c7-4759-b475-99e50168d622','A21',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx '91ca8257-317e-4a6b-ab33-99e50169540a','product','2b975d64-27c7-4759-b475-99e50168d622','A22',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx '4ce0b1de-68ab-4e2b-bb85-99e5016961b7','product','2b975d64-27c7-4759-b475-99e50168d622','A23',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx 'cc05c6e0-fde8-4f1c-aac6-99e50169f995','product','4ce0b1de-68ab-4e2b-bb85-99e5016961b7','A231',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx '31c710bd-d2ff-4ffb-a8e9-99e50169eee4','product','4ce0b1de-68ab-4e2b-bb85-99e5016961b7','A232',''");
        Database.ExecuteNonQuery(conn, CommandType.Text, "exec up_Class_InsertEx 'c11d5fc2-cb6b-488c-b97c-99e5016a4c9a','product','c12fe245-75ec-4b28-82e1-99e501672f41','A3',''");

 //读出节点
        SqlDataReader sdr = Database.ExecuteReader(conn, CommandType.Text, _strSql);
        while (sdr.Read())
        {
            string t = "";
            for (int i = 0; i < Convert.ToInt16(sdr["F_Depth"].ToString()); i++)
            {
                t += "　|- ";
            }
            Response.Write(t + sdr["F_ClassName"].ToString() + "<br/>");
        }
        sdr.Close();

        Database.Dispose(conn);

最终页面上的显示结果如下:

A
|- A1
|- 　|- A11
|- 　|- A12
|- A2
|- 　|- A21
|- 　|- A22
|- 　|- A23
|- 　|- 　|- A231
|- 　|- 　|- A232
|- A3