FlowPortal-BPM——获取树状结构的物料分类

　　 /// <summary>
    /// 获取物料分类-树形结构
    /// </summary>
    /// <returns></returns> 
    public JObject getMaterialBasicClass(HttpContext context)
    {
        string sql = "select pk_marbasclass, code, name, pk_parent from V_NCC_MaterialBasicClass where name not like '%停用%' and code not in('T','Z') order by pk_marbasclass";
        SqlConnection con = new SqlConnection();
        con.ConnectionString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["BLDB"].ConnectionString;
        SqlDataAdapter ada = new SqlDataAdapter();
        SqlCommandBuilder sb = new SqlCommandBuilder(ada);
        ada.SelectCommand = new SqlCommand(sql, con);
        DataSet ds = new DataSet();
        ada.Fill(ds);
        DataTable tb = ds.Tables[0];

        string key, MID, text, leaf, searchType = "11";

        //↓↓↓一级分类
        List<object> Leafchildren_1 = new List<object>();
        for (int i = 0; i < tb.Rows.Count; i++)
        {

            if (tb.Rows[i]["pk_parent"].ToString() == "~")
            {
                //↓↓↓二级分类
                List<object> Leafchildren_2 = new List<object>();
                for (int j = 0; j < tb.Rows.Count; j++)
                {
                    if (tb.Rows[j]["pk_parent"].ToString() == tb.Rows[i]["pk_marbasclass"].ToString())
                    {
                        //↓↓↓三级分类
                        List<object> Leafchildren_3 = new List<object>();
                        for (int k = 0; k < tb.Rows.Count; k++)
                        {
                            if (tb.Rows[k]["pk_parent"].ToString() == tb.Rows[j]["pk_marbasclass"].ToString())
                            {
                                //↓↓↓四级分类
                                List<object> Leafchildren_4 = new List<object>();
                                for (int l = 0; l < tb.Rows.Count; l++)
                                {
                                    if (tb.Rows[l]["pk_parent"].ToString() == tb.Rows[k]["pk_marbasclass"].ToString())
                                    {
                                        DataRow item_4 = tb.Rows[l];
                                        key = item_4["pk_marbasclass"].ToString();
                                        MID = item_4["code"].ToString();
                                        text = item_4["name"].ToString();
                                        leaf = "true";

                                        Leafchildren_4.Add(new { key, MID, leaf, text, searchType });
                                    }
                                }
                                //↑↑↑四级分类

                                DataRow item_3 = tb.Rows[k];
                                key = item_3["pk_marbasclass"].ToString();
                                MID = item_3["code"].ToString();
                                text = item_3["name"].ToString();

                                if (Leafchildren_4.Count > 0)
                                {
                                    leaf = "false";
                                    Leafchildren_3.Add(new { key, MID, leaf, text, searchType, Leafchildren_4 });
                                }
                                else
                                {
                                    leaf = "true";
                                    Leafchildren_3.Add(new { key, MID, leaf, text, searchType });
                                }
                            }
                        }
                        //↑↑↑三级分类

                        DataRow item_2 = tb.Rows[j];
                        key = item_2["pk_marbasclass"].ToString();
                        MID = item_2["code"].ToString();
                        text = item_2["name"].ToString();

                        if (Leafchildren_3.Count > 0)
                        {
                            leaf = "false";
                            Leafchildren_2.Add(new { key, MID, leaf, text, searchType, Leafchildren_3 });
                        }
                        else
                        {
                            leaf = "true";
                            Leafchildren_2.Add(new { key, MID, leaf, text, searchType });
                        }
                    }
                }
                //↑↑↑二级分类

                DataRow item_1 = tb.Rows[i];
                key = item_1["pk_marbasclass"].ToString();
                MID = item_1["code"].ToString();
                text = item_1["name"].ToString();

                if (Leafchildren_2.Count > 0)
                {
                    leaf = "false";
                    Leafchildren_1.Add(new { key, MID, leaf, text, searchType, Leafchildren_2 });
                }
                else
                {
                    leaf = "true";
                    Leafchildren_1.Add(new { key, MID, leaf, text, searchType });
                }
            }
        }
        //↑↑↑一级分类

        //↓↓↓根目录
        List<object> GchildrenG = new List<object>();

        bool expanded = true;
        text = "产品分类";
        key = "All";
        string pk_marbasclass = "%";
        string success = "True";

        if (Leafchildren_1.Count > 0)
        {
            leaf = "false";
            GchildrenG.Add(new { pk_marbasclass, key, expanded, leaf, text, searchType, Leafchildren_1 });
        }
        else
        {
            leaf = "true";
            GchildrenG.Add(new { pk_marbasclass, key, expanded, leaf, text, searchType });
        }
        //↑↑↑根目录

        //标签名替换
        return JObject.Parse(JsonConvert.SerializeObject(new { GchildrenG, success }).Replace("GchildrenG", "children").Replace("Leafchildren_1", "children").Replace("Leafchildren_2", "children").Replace("Leafchildren_3", "children").Replace("Leafchildren_4", "children"));
　　 }