Ext.Net 1.2.0_在程序集中自定义 TreePanel 控件

本文内容

• 概述
• 演示在程序集中自定义 TreePanel 控件
• 运行结果

 

概述

之前，我在博文 Ext.Net_在 Web 应用程序中自定义 TreePanel 控件 中，演示如何用 Ext.Net 在 Web 应用程序中自定义 TreePanel 控件。自定义的 TreePanel 控件由两个文件、三部分组成：控件的类文件和外部脚本文件。其中，控件类文件是一个分部类，分别实现控件的 UI 代码和逻辑代码。UI 代码负责创建控件标记；逻辑代码创建控件的客户端事件和服务器端事件。外部脚本文件用于在客户端操作控件。类文件和脚本文件都在 Web 应用程序中，但是它们也可以在程序集中，而且可以把脚本文件作为程序集的嵌入资源，在 Web 应用程序中使用。

演示在程序集中自定义 TreePanel 控件

• 解决方案结构

• 自定义 TreePanel UI

using System;
using System.Collections.Generic;
using System.ComponentModel;
using Ext.Net;

namespace MyExtNet.MyControl
{
    public partial class TreePanel : Ext.Net.TreePanel
    {
        public TreePanel()
        {
            this.ID = "TreePanel1";
            this.Title = "MyTreePanel";
            this.Width = System.Web.UI.WebControls.Unit.Pixel(300);
            this.Height = System.Web.UI.WebControls.Unit.Pixel(400);
            this.UseArrows = true;
            this.AutoScroll = true;
            this.Animate = true;
            this.EnableDD = true;
            this.ContainerScroll = true;
            this.RootVisible = false;

            this.LoadMask.ShowMask = true;

            this.SelectionModel.Add(new Ext.Net.DefaultSelectionModel());

            this.BuildTree();
            this.InitLogic();
        }

        private void BuildTree()
        {
            Ext.Net.TreeNode root = new Ext.Net.TreeNode("Composers");
            root.Expanded = true;
            this.Root.Add(root);


            List<Composer> composers = MyData.GetData();

            foreach (Composer composer in composers)
            {
                Ext.Net.TreeNode composerNode = new Ext.Net.TreeNode(composer.Name, Icon.UserGray);
                composerNode.Checked = Ext.Net.ThreeStateBool.False;
                composerNode.Leaf = false;
                composerNode.Icon = Ext.Net.Icon.Folder;
                root.Nodes.Add(composerNode);

                foreach (Composition composition in composer.Compositions)
                {
                    Ext.Net.TreeNode compositionNode = new Ext.Net.TreeNode(composition.Type.ToString());
                    compositionNode.Checked = Ext.Net.ThreeStateBool.False;
                    compositionNode.Leaf = false;
                    compositionNode.Icon = Ext.Net.Icon.Folder;
                    composerNode.Nodes.Add(compositionNode);

                    foreach (Piece piece in composition.Pieces)
                    {
                        Ext.Net.TreeNode pieceNode = new Ext.Net.TreeNode(piece.Title, Icon.Music);
                        pieceNode.Checked = Ext.Net.ThreeStateBool.False;
                        pieceNode.Leaf = true;
                        compositionNode.Nodes.Add(pieceNode);
                    }
                }
            }
        }
    }
}

• 自定义 TreePanel Logic

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.UI;
using Ext.Net.Utilities;
using Ext.Net;

namespace MyExtNet.MyControl
{
    [DirectMethodProxyID(IDMode = DirectMethodProxyIDMode.None)]
    public partial class TreePanel
    {
        public const string SCOPE = "MyExtNet.MyControl.TreePanel";

        private void InitLogic()
        {
            this.Listeners.Render.Fn = TreePanel.SCOPE + ".init";
            this.Listeners.Render.Scope = TreePanel.SCOPE;
            this.Listeners.CheckChange.Handler = TreePanel.SCOPE + ".SelectParentChildNodes(node,checked);";


            Ext.Net.Button button = new Ext.Net.Button();
            button.ID = "btnGet";
            button.Text = "获得勾选";
            button.Listeners.Click.Handler = TreePanel.SCOPE + ".getSelectedNode('" + this.ClientID + "')";
            this.Buttons.Add(button);
            button = new Ext.Net.Button();
            button.ID = "btnClear";
            button.Text = "清除勾选";
            button.Listeners.Click.Handler = TreePanel.SCOPE + ".clearSelectedNode('" + this.ClientID + "')";
            this.Buttons.Add(button);
        }
    }
}

• 自定义数据 Composition.cs

using System;
using System.Collections;
using System.Collections.Generic;

namespace MyExtNet.MyControl
{
    /// <summary>
    /// 作曲家
    /// </summary>
    public class Composer
    {
        public Composer(string name) { this.Name = name; }
        public string Name { get; set; }

        private List<Composition> compositions;
        public List<Composition> Compositions
        {
            get
            {
                if (this.compositions == null)
                {
                    this.compositions = new List<Composition>();
                }
                return this.compositions;
            }
        }
    }
    /// <summary>
    /// 作品
    /// </summary>
    public class Composition
    {
        public Composition() { }

        public Composition(CompositionType type)
        {
            this.Type = type;
        }

        public CompositionType Type { get; set; }

        private List<Piece> pieces;
        public List<Piece> Pieces
        {
            get
            {
                if (this.pieces == null)
                {
                    this.pieces = new List<Piece>();
                }
                return this.pieces;
            }
        }
    }
    /// <summary>
    /// 作品
    /// </summary>
    public class Piece
    {
        public Piece() { }

        public Piece(string title)
        {
            this.Title = title;
        }

        public string Title { get; set; }
    }
    /// <summary>
    /// 作品类型
    /// </summary>
    public enum CompositionType
    {
        Concertos,
        Quartets,
        Sonatas,
        Symphonies
    }

    public class MyData
    {
        public static List<Composer> GetData()
        {
            Composer beethoven = new Composer("Beethoven");

            Composition beethovenConcertos = new Composition(CompositionType.Concertos);
            Composition beethovenQuartets = new Composition(CompositionType.Quartets);
            Composition beethovenSonatas = new Composition(CompositionType.Sonatas);
            Composition beethovenSymphonies = new Composition(CompositionType.Symphonies);

            beethovenConcertos.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "No. 1 - C" },
            new Piece{ Title = "No. 2 - B-Flat Major" },
            new Piece{ Title = "No. 3 - C Minor" },
            new Piece{ Title = "No. 4 - G Major" },
            new Piece{ Title = "No. 5 - E-Flat Major" }
        });

            beethovenQuartets.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "Six String Quartets" },
            new Piece{ Title = "Three String Quartets" },
            new Piece{ Title = "Grosse Fugue for String Quartets" }
        });

            beethovenSonatas.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "Sonata in A Minor" },
            new Piece{ Title = "sonata in F Major" }
        });

            beethovenSymphonies.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "No. 1 - C Major" },
            new Piece{ Title = "No. 2 - D Major" },
            new Piece{ Title = "No. 3 - E-Flat Major" },
            new Piece{ Title = "No. 4 - B-Flat Major" },
            new Piece{ Title = "No. 5 - C Minor" },
            new Piece{ Title = "No. 6 - F Major" },
            new Piece{ Title = "No. 7 - A Major" },
            new Piece{ Title = "No. 8 - F Major" },
            new Piece{ Title = "No. 9 - D Minor" }
        });

            beethoven.Compositions.AddRange(new List<Composition>{
            beethovenConcertos,
            beethovenQuartets,
            beethovenSonatas,
            beethovenSymphonies
        });


            Composer brahms = new Composer("Brahms");

            Composition brahmsConcertos = new Composition(CompositionType.Concertos);
            Composition brahmsQuartets = new Composition(CompositionType.Quartets);
            Composition brahmsSonatas = new Composition(CompositionType.Sonatas);
            Composition brahmsSymphonies = new Composition(CompositionType.Symphonies);

            brahmsConcertos.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "Violin Concerto" },
            new Piece{ Title = "Double Concerto - A Minor" },
            new Piece{ Title = "Piano Concerto No. 1 - D Minor" },
            new Piece{ Title = "Piano Concerto No. 2 - B-Flat Major" }
        });

            brahmsQuartets.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "Piano Quartet No. 1 - G Minor" },
            new Piece{ Title = "Piano Quartet No. 2 - A Major" },
            new Piece{ Title = "Piano Quartet No. 3 - C Minor" },
            new Piece{ Title = "Piano Quartet No. 3 - B-Flat Minor" }
        });

            brahmsSonatas.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "Two Sonatas for Clarinet - F Minor" },
            new Piece{ Title = "Two Sonatas for Clarinet - E-Flat Major" }
        });

            brahmsSymphonies.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "No. 1 - C Minor" },
            new Piece{ Title = "No. 2 - D Minor" },
            new Piece{ Title = "No. 3 - F Major" },
            new Piece{ Title = "No. 4 - E Minor" }
        });

            brahms.Compositions.AddRange(new List<Composition>{
            brahmsConcertos,
            brahmsQuartets,
            brahmsSonatas,
            brahmsSymphonies
        });


            Composer mozart = new Composer("Mozart");

            Composition mozartConcertos = new Composition(CompositionType.Concertos);

            mozartConcertos.Pieces.AddRange(new List<Piece> {
            new Piece{ Title = "Piano Concerto No. 12" },
            new Piece{ Title = "Piano Concerto No. 17" },
            new Piece{ Title = "Clarinet Concerto" },
            new Piece{ Title = "Violin Concerto No. 5" },
            new Piece{ Title = "Violin Concerto No. 4" }
        });

            mozart.Compositions.Add(mozartConcertos);

            return new List<Composer> { beethoven, brahms, mozart };
        }
    }
}

• 自定义脚本 myTreePanel.js

Ext.ns("MyExtNet.MyControl");

MyExtNet.MyControl.TreePanel = {
    tr: null,
    init: function(tree) {
        this.tr = tree;
    },
    SelectParentChildNodes: function(node, state) {
        var tree = node.getOwnerTree();
        tree.suspendEvents();
        if (node.parentNode != null) {
            // 勾选该节点所有子节点
            node.cascade(function(node) {
                node.attributes.checked = state;
                node.ui.toggleCheck(state);
                return true;
            });
            // 勾选该节点父节点
            var pNode = node.parentNode;
            while (pNode != null) {
                if (state) { //如果选中状态无所谓
                    pNode.ui.toggleCheck(state);
                    pNode.attributes.checked = state;
                    pNode = pNode.parentNode;
                }
                else { //如果未选中状态，需要查看该节点是否所有子节点都未选中
                    var chk = false;
                    pNode.eachChild(function(child) {
                        if (child.attributes.checked || child.getUI().isChecked())
                            chk = true;
                    });
                    pNode.ui.toggleCheck(chk);
                    pNode.attributes.checked = chk;
                    pNode = pNode.parentNode;
                }
            }
        }
        tree.resumeEvents();
    },
    getSelectedNode: function(treeId) {
        var tree = Ext.getCmp(treeId);
        var msg = [];
        var selNodes = tree.getChecked();

        Ext.each(selNodes, function(node) {
            msg.push(node.text);
        });

        Ext.Msg.show({
            title: "勾选节点",
            msg: msg.join(','),
            icon: Ext.Msg.INFO,
            minWidth: 200,
            buttons: Ext.Msg.OK
        });
    },
    clearSelectedNode: function(treeId) {
        var tree = Ext.getCmp(treeId);
        tree.clearChecked();
    }
};

• 创建页面

<%@ Page Language="C#" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
<%@ Register Assembly="MyExtNet.MyControl" Namespace="MyExtNet.MyControl" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <ext:ResourcePlaceHolder ID="ResourcePlaceHolder1" runat="server" Mode="Script" />

    <script runat="server">           protected void Page_Load(object sender, EventArgs e)         {             if (!X.IsAjaxRequest)             {                 string url = X.ResourceManager.GetWebResourceUrl(typeof(MyExtNet.MyControl.MyResourceManager),                                                              "MyExtNet.MyControl.Resources.myTreePanel.js");                 X.ResourceManager.RegisterClientScriptInclude(string.Format("{0}_Script", MyExtNet.MyControl.TreePanel.SCOPE), url);             }         }     </script>

</head>
<body>
    <form id="form1" runat="server">
    <ext:ResourceManager ID="ResourceManager1" runat="server">
    </ext:ResourceManager>
    <cc1:TreePanel ID="TreePanel1" runat="server">
    </cc1:TreePanel>
    </form>
</body>
</html>

说明

1. 在页面的 Page_Load 事件里，引入程序集的嵌入资源——myTreePanel.js。
2. 利用 Ext.Net.ResourceManager 来管理自定义脚本，可以自动设置脚本的资源的 Expire 和 Cache-Control 头，减少 HTTP 请求的次数。

运行结果

下载 Demo