Extjs入门之动态加载树代码_extjs
- WBOY原创
- 2016-05-16 18:30:031510浏览
Extjs动态加载树，首先在数据库里面设计存放树信息的表 
复制代码 代码如下:
USE [KimiExtjs]
GO
/****** 对象: Table [dbo].[Trees] 脚本日期: 04/08/2010 22:12:25 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Trees](
[Tid] [varchar](40) COLLATE Chinese_PRC_CI_AS NOT NULL,---节点ID 主键 Guid
[ParentId] [varchar](40) COLLATE Chinese_PRC_CI_AS NULL,---父亲节点ID 0表示为根目录
[ContentText] [varchar](800) COLLATE Chinese_PRC_CI_AS NULL,---节点现实内容
[StrHref] [varchar](800) COLLATE Chinese_PRC_CI_AS NULL,---节点链接地址
[hrefTarget] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,---Target
CONSTRAINT [PK_Trees] PRIMARY KEY CLUSTERED
(
[Tid] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
构建完数据表后，我们将开始应运程序的开发，首先页面的设计，html代码如下：
复制代码 代码如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Main.aspx.cs" Inherits="Com.KimiYang.Web.Main" %>
js代码如下所示:
复制代码 代码如下:
Ext.onReady(function(){
Ext.BLANK_IMAGE_URL="Extjs3.2.0/resources/images/default/s.gif";
var Tree = Ext.tree;
var tree = new Tree.TreePanel({
el:'west_content',//渲染到
useArrows:true,
autoHeight:true,
split:true,
lines:true,
autoScroll:true,
animate:true,
enableDD:true,
border:false,
containerScroll: true,
loader: new Tree.TreeLoader({
dataUrl :'ServletHandlers/GetTrees.ashx'
})
}); var root = new Tree.AsyncTreeNode({
text: 'KimiYang',
draggable:true,
id:'0'
});
tree.setRootNode(root);
root.expand();
var viewport = new Ext.Viewport( {
layout:'border',
items:[{
region:'west',
id:'west',
title:'导航菜单',
split: true，
宽度：200，
minSize：200，
maxSize：400，
可折叠：true，
边距：'60 0 2 2'，
cmmargins：'60 5 2 2',
layout:'fit',
layoutConfig:{ activeontop:true},
defaults: { bodyStyle: 'margin:0;padding:0;'},
items:
new Ext.TabPanel({
border:false,
activeTab:0,
tabPosition:'bottom',
items:[{
contentEl:'west_content',
title:'系统管理',
autoScroll:true,
bodyStyle:'padding:5px;'
},
{
title:'网上办公',
autoScroll:true ,
bodyStyle:'padding:5px;'
}]
})
},{
region:'center',
el:'center',
deferredRender :false,
边距:'60 0 2 0',
html:'',
autoScroll:true
},
{
区域:'南',
边距:'0 0 0 2',
边框:false,
html:''
}
]
})
setTimeout(function(){
Ext.get('loading').remove();
Ext.get('loading-mask); ').fadeOut({remove:true});
}, 250)
});
C#代码如下图：
复制代码 代码如下：
使用 System; 使用 System.Collections;
使用 System.Data; >使用 System.Linq;
使用 System.Web.Services;
使用 System.Xml.Linq; Com.KimiYang.Web.ServletHandlers
{
///
/// $codebehindclassname$ 的摘要说明
/// [WebService(命名空间 = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class GetTrees : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
string strSql = "从树中选择 Tid,ParentId,ContentText,StrHref,hrefTarget";
dbOperator db = new dbOperator();
DataTable dt = db.Execute(strSql); >string strResult = "[";
if (dt.Rows.Count > 0)
{
DataRow[] dr = dt.Select("ParentId='0'");
strResult = DtTreeToJson(dt, strResult, dr);
}
strResult = "]";
context.Response.ContentType = "text/plain";
context.Response.Write(strResult.ToString());
context.Response.End();
}
private static string DtTreeToJson(DataTable dt, string strResult, DataRow[] dr)
{
if (dr.Length > 0)
{
for (int i = 0; 长度 i )
{
strResult = "{";
strResult = "text:'" dr[i]["ContentText"] "',";
strResult = "id:'" dr[i]["Tid"] "',";
DataRow[] drChild = dt.Select("ParentId='" dr[i]["Tid"] "'");
if (drChild.Length > 0)
{
strResult = "leaf:false,";
strResult = "孩子:[";
strResult = DtTreeToJson(dt, strResult, drChild);
strResult = "]";
}
else
{
strResult = "href:'" dr[i]["StrHref"] "',";
strResult = "hrefTarget:'" dr[i]["hrefTarget"] "',";
strResult = "leaf:true";
}
strResult = "}";
if (i != dr.Length - 1)
strResult = ",";
}
}
返回 strResult;
}
public bool IsReusable
{
获取
{
返回 false;
}
}
}
}
页面效果图：
来源代码下载
ExtjsTree.rar
使用 System.Data; >使用 System.Linq;
使用 System.Web.Services;
使用 System.Xml.Linq; Com.KimiYang.Web.ServletHandlers
{
///
/// $codebehindclassname$ 的摘要说明
///
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class GetTrees : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
string strSql = "从树中选择 Tid,ParentId,ContentText,StrHref,hrefTarget";
dbOperator db = new dbOperator();
DataTable dt = db.Execute(strSql); >string strResult = "[";
if (dt.Rows.Count > 0)
{
DataRow[] dr = dt.Select("ParentId='0'");
strResult = DtTreeToJson(dt, strResult, dr);
}
strResult = "]";
context.Response.ContentType = "text/plain";
context.Response.Write(strResult.ToString());
context.Response.End();
}
private static string DtTreeToJson(DataTable dt, string strResult, DataRow[] dr)
{
if (dr.Length > 0)
{
for (int i = 0; 长度 i )
{
strResult = "{";
strResult = "text:'" dr[i]["ContentText"] "',";
strResult = "id:'" dr[i]["Tid"] "',";
DataRow[] drChild = dt.Select("ParentId='" dr[i]["Tid"] "'");
if (drChild.Length > 0)
{
strResult = "leaf:false,";
strResult = "孩子:[";
strResult = DtTreeToJson(dt, strResult, drChild);
strResult = "]";
}
else
{
strResult = "href:'" dr[i]["StrHref"] "',";
strResult = "hrefTarget:'" dr[i]["hrefTarget"] "',";
strResult = "leaf:true";
}
strResult = "}";
if (i != dr.Length - 1)
strResult = ",";
}
}
返回 strResult;
}
public bool IsReusable
{
获取
{
返回 false;
}
}
}
}
页面效果图：
来源代码下载
ExtjsTree.rar
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