基於SqlSugar的開發框架循序漸進介紹（28）-- 快速構建系統引數管理介面

    /// <summary>
    /// 系統引數設定 應用層服務介面實現
    /// </summary>
    public class SystemParamsService : MyCrudService<SystemParamsInfo,string, SystemParamsPagedDto>, ISystemParamsService
  {
       //相關程式碼
  }

        /// <summary>
        /// 編寫初始化表單的實現，可以用於重新整理
        /// </summary>
        public override void FormOnLoad()
        {
            InitSearchControl();
            InitTree();
            BindTree();

            InitDictItem();
            BindData();
        }

      /// <summary>
        /// 初始化樹控制元件
        /// </summary>
        private void InitTree()
        {
            this.tree.Columns.Clear();

            //控制元件擴充套件函數封裝處理
            this.tree.CreateColumn("CategoryName", "系統引數目錄", 160, true);
            this.tree.InitTree(Id_FieldName, "PID", null, false, false);
            this.tree.OptionsDragAndDrop.DragNodesMode = DragNodesMode.Single;

            //設定樹的圖示集合及逐級圖示
            this.tree.SelectImageList = this.imageList1;
            this.tree.CustomDrawNodeImages += (object sender, CustomDrawNodeImagesEventArgs e) =>
            {
                int maxCount = this.imageList1.Images.Count;
                var index = e.Node.Level < maxCount ? e.Node.Level : 0;
                e.SelectImageIndex = index;
            };

            //初始化樹節點選擇事件
            this.tree.FocusedNodeChanged += delegate (object sender, FocusedNodeChangedEventArgs e)
            {
                this.FocusedNodeChanged();
            };
            this.tree.MouseDoubleClick += (s, e) => { menu_EditType_Click(null, null); };
        }

        /// <summary>
        /// 實現樹節點的過濾查詢
        /// </summary>
        private void InitSearchControl()
        {
            this.searchControl1.Client = this.tree;
            this.tree.FilterNode += (object sender, FilterNodeEventArgs e) =>
            {
                if (tree.DataSource == null)
                    return;

                string nodeText = e.Node.GetDisplayText("CategoryName");//引數填寫FieldName  
                if (string.IsNullOrWhiteSpace(nodeText))
                    return;

                bool isExist = nodeText.IndexOf(searchControl1.Text, StringComparison.OrdinalIgnoreCase) >= 0;
                if (isExist)
                {
                    var node = e.Node.ParentNode;
                    while (node != null)
                    {
                        if (!node.Visible)
                        {
                            node.Visible = true;
                            node = node.ParentNode;
                        }
                        else
                            break;
                    }
                }
                e.Node.Visible = isExist;
                e.Handled = true;
            };
        }

        /// <summary>
        /// 選中樹節點觸發的查詢處理
        /// </summary>
        private void FocusedNodeChanged()
        {
            if (this.tree.FocusedNode != null)
            {
                BindData();
            }
        }
        /// <summary>
        /// 繫結樹的資料來源
        /// </summary>
        private async void BindTree()
        {
            var result = await BLLFactory<ISystemParamsDirService>.Instance.GetAllAsync();
            if (result != null)
            {
                this.tree.DataSource = result.Items;
                this.tree.ExpandAll();
            }
        }

BLLFactory<ISystemParamsDirService>.Instance.GetAllAsync();