[Ext.Net] 1.2.0

[Ext.Net] 1.2.0

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 (thispositions == null)

                {

                    thispositions = new List<Composition>();

                }

                return thispositions;

            }

        }

    }

    /// <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) {

         = tree;

    },

    SelectParentChildNodes: function(node, state) {

        var tree = OwnerTree();

        tree.suspendEvents();

        if (node.parentNode != null) {

            // 勾选该节点所有子节点

            node.cascade(function(node) {

                node.attributes.checked = state;

                leCheck(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

                    leCheck(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 || UI().isChecked())

                            chk = true;

                    });

                    leCheck(chk);

                    pNode.attributes.checked = chk;

                    pNode = pNode.parentNode;

                }

            }

        }

        sumeEvents();

    },

    getSelectedNode: function(treeId) {

        var tree = Cmp(treeId);

        var msg = [];

        var selNodes = Checked();

        Ext.each(selNodes, function(node) {

            msg.);

        });

        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 = Cmp(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" ".dtd">

<html xmlns="">

<head runat="server">

    <title></title>

    <ext:ResourcePlaceHolder ID="ResourcePlaceHolder1" runat="server" Mode="Script" />

    <script runat="server">
   1:  
   2:         protected void Page_Load(object sender, EventArgs e)
   3:         {
   4:             if (!X.IsAjaxRequest)
   5:             {
   6:                 string url = X.ResourceManager.GetWebResourceUrl(typeof(MyExtNet.MyControl.MyResourceManager),
   7:                                                              "MyExtNet.TreePanel.js");
   8:                 X.ResourceManager.RegisterClientScriptInclude(string.Format("{0}_Script", MyExtNet.MyControl.TreePanel.SCOPE), url);
   9:             }
  10:         }
  11:     
</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