ExtJS与.NET结合开发实例(Grid之数据显示、分页、排序篇)

最近园子里有很多朋友关心ExtJS，我最近写了一个项目管理工具用到ExtJS,我结合.NET写了个关于Grid实现的一个实例供需要的朋友参考。
    本实例开发环境是：Windows XP + Sql Server 2005 + IIS6+VS 2008 Beta2(.NET Framework3.5)
    实现步骤：
    1.取数据源
      这里是从数据库里读取数据生产JSON的方式供ExtJS Grid调用.
      (1)用Scott Guthrie提供的生产JSON格式的类,这篇文章可以访问:http://weblogs.asp.net/scottgu/archive/2007/10/01/tip，它的译文请访问:http://blog.joycode.com/scottgu/archive/2007/10/10/109268.aspx
      建一个类文件JSONHelper.cs,代码如下：

using System;
2

using System.Collections.Generic;
3

using System.Text;
4

using System.Web.Script.Serialization;
5

namespace Web.Components
6

{
7

public static class JSONHelper
8

{
9

public static string ToJSON(this object obj)
10

{
11

JavaScriptSerializer serializer = new JavaScriptSerializer();
12

return serializer.Serialize(obj);
13

}
14

public static string ToJSON(this object obj, int recursionDepth)
16

{
17

JavaScriptSerializer serializer = new JavaScriptSerializer();
18

serializer.RecursionLimit = recursionDepth;
19

return serializer.Serialize(obj);
20

}
21

}
22

}
23

(2)利用LINQ读取数据记录，关于LINQ方面的文章参考Scott Guthrie的LINQ to SQL系列文章
为了方便ExtJS AJAX方式的调用，这里建一个ASPX页面，起名为：ProjectBaseInfo.aspx，代码如下：

using System;
2

using System.Data;
3

using System.Configuration;
4

using System.Collections;
5

using System.Linq;
6

using System.Web;
7

using System.Web.Security;
8

using System.Web.UI;
9

using System.Web.UI.WebControls;
10

using System.Web.UI.WebControls.WebParts;
11

using System.Web.UI.HtmlControls;
12

using System.Xml.Linq;
13

using BusinessObject.Projects; //dbml文件的引用
14

using System.Data.OracleClient;
15

using Database;
16

using Web.Components;
17

namespace Web.Projects.JsonDataSource
18

{
19

public partial class ProjectBaseInfo : System.Web.UI.Page
20

{
21

protected string strJsonSource=string.Empty;
22

protected void Page_Load(object sender, EventArgs e)
23

{
24

int start=int.Parse(Request.Form["start"]+""); //分页需要limit,start是mysql里用的（或取当页开始的记录标识编号）
25

int limit = int.Parse(Request.Form["limit"] + ""); //或取每页记录数
26

string sort = Request.Form["sort"] + ""; //或取排序方向
27

string dir = Request.Form["dir"] + ""; //或取所要排序的字段名
28

GetJsonSouceString(start,limit,sort,dir);
29

}
30

private void GetJsonSouceString(int start,int limit,string sort,string dir)
32

{
33

ProjectBaseInfoDataContext db = new ProjectBaseInfoDataContext();
34

var query = from p in db.PROJECT_BASE_INFOs
35

select new { p.PROJECT_NO, p.PROJECT_NAME, p.PROJECT_DEPT_NO, p.PROJECT_MANAGER, p.PROJECT_CURRENT_STATUS, PROJECT_START_DATE = p.PROJECT_START_DATE + "", PROJECT_FINISH_DATE = p.PROJECT_FINISH_DATE + "", PROJECT_REAL_START_DATE = p.PROJECT_REAL_START_DATE + "", PROJECT_REAL_FINISH_DATE = p.PROJECT_REAL_FINISH_DATE + "", p.PROJECT_ALIAS, p.PROJECT_TYPE, p.PROJECT_LEADER, p.PROJECT_MEMO }; //类似PROJECT_REAL_FINISH_DATE=p.PROJECT_REAL_FINISH_DATE+"的处理了Grid中日期格式显示的问题
36

#region 排序字段和排序方向
37

if (sort != "" && dir != "")
38

{
39

switch (sort)
40

{
41

case "PROJECT_NO":
42

if (dir == "ASC")
43

{
44

query = query.OrderBy(p => p.PROJECT_NO);
45

}
46

else
47

{
48

query = query.OrderByDescending(p => p.PROJECT_NO);
49

}
50

break;
51

case "PROJECT_NAME":
52

if (dir == "ASC")
53

{
54

query = query.OrderBy(p => p.PROJECT_NAME);
55

}
56

else
57

{
58

query = query.OrderByDescending(p => p.PROJECT_NAME);
59

}
60

break;
61

case "PROJECT_DEPT_NO":
62

if (dir == "ASC")
63

{
64

query = query.OrderBy(p => p.PROJECT_DEPT_NO);
65

}
66

else
67

{
68

query = query.OrderByDescending(p => p.PROJECT_DEPT_NO);
69

}
70

break;
71

case "PROJECT_MANAGER":
72

if (dir == "ASC")
73

{
74

query = query.OrderBy(p => p.PROJECT_MANAGER);
75

}
76

else
77

{
78

query = query.OrderByDescending(p => p.PROJECT_MANAGER);
79

}
80

break;
81

case "PROJECT_CURRENT_STATUS":
82

if (dir == "ASC")
83

{
84

query = query.OrderBy(p => p.PROJECT_CURRENT_STATUS);
85

}
86

else
87

{
88

query = query.OrderByDescending(p => p.PROJECT_CURRENT_STATUS);
89

}
90

break;
91

case "PROJECT_START_DATE":
92

if (dir == "ASC")
93

{
94

query = query.OrderBy(p => p.PROJECT_START_DATE);
95

}
96

else
97

{
98

query = query.OrderByDescending(p => p.PROJECT_START_DATE);
99

}
100

break;
101

case "PROJECT_FINISH_DATE":
102

if (dir == "ASC")
103

{
104

query = query.OrderBy(p => p.PROJECT_FINISH_DATE);
105

}
106

else
107

{
108

query = query.OrderByDescending(p => p.PROJECT_FINISH_DATE);
109

}
110

break;
111

case "PROJECT_REAL_START_DATE":
112

if (dir == "ASC")
113

{
114

query = query.OrderBy(p => p.PROJECT_REAL_START_DATE);
115

}
116

else
117

{
118

query = query.OrderByDescending(p => p.PROJECT_REAL_START_DATE);
119

}
120

break;
121

case "PROJECT_REAL_FINISH_DATE":
122

if (dir == "ASC")
123

{
124

query = query.OrderBy(p => p.PROJECT_REAL_FINISH_DATE);
125

}
126

else
127

{
128

query = query.OrderByDescending(p => p.PROJECT_REAL_FINISH_DATE);
129

}
130

break;
131

default:
132

break;
133

}
134

}
135

#endregion
136

137

int iCount = query.Count(); //所要记录数
138

int PageNum = start / limit; //共有页数
139

int PageSize = limit;
140

query = query.Skip(PageSize * PageNum).Take(PageSize); //当前页记录
141

string JsonSource= query.ToJSON(); //当前页记录转成JSON格式
142

strJsonSource = @"{""totalCount"":"""+iCount+"";
143

strJsonSource = strJsonSource + @""",""data"":" + JsonSource + "}"; //Grid的分页区显示所有记录数增加totalCount信息
144

}
145

}
146

}
147

ProjectBaseInfo.aspx中的代码为：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ProjectBaseInfo.aspx.cs" Inherits="Web.Projects.JsonDataSource.ProjectBaseInfo" %>
<%=strJsonSource %>

    至此，已完成了取数据源。
   2.页面客户端
     (1)下载ExtJS库，请访问：http://extjs.com/。
     (2)在你的WEB工程中建一个ExtJS目录。把下载的包里的目录都COPY进来（为了简便起见）。
     (3)建一个ProjectLists.html页面，代码如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2

<html xmlns="http://www.w3.org/1999/xhtml">
3

<head runat="server">
4

<title>项目一览表</title>
5

8

9

11

19

body .x-panel
21

{
22

margin-bottom: 20px;
23

}
24

.icon-grid
25

{
26

}
28

#button-grid .x-panel-body
29

{
30

border: 1px solid #99bbe8;
31

border-top: 0 none;
32

}
33

.add
34

{
35

}
37

.search
38

{
39

}
41

.remove
42

{
43

}
45

.save
46

{
47

}
49

.ext-mb-save
50

{
51

background: transparent url(../Images/download.gif) no-repeat top left;
52

height: 46px;
53

}
54

</style>
55

</head>
56

<body>
58

</body>
59

</html>

（注：请注意JS引用的路径）
(1)新建GridForProjectLists.js文件（这个才是核心

）
代码如下：

/*
2

* Ext JS Library 2.0 Beta 1
3

* Copyright(c) 2006-2007, Ext JS, LLC.
4

* licensing@extjs.com
5

*
6

* http://extjs.com/license
7

*/
8

Ext.onReady(function(){
9

var win;
10

var newwin;
11

Ext.QuickTips.init();
12

// create the Data Store
13

var ds = new Ext.data.GroupingStore({
14

// load using script tags for cross domain, if the data in on the same domain as
15

// this page, an HttpProxy would be better
16

proxy: new Ext.data.HttpProxy({
17

url: '../Projects/JsonDataSource/ProjectBaseInfo.aspx'
18

}),
19

// create reader that reads the project records
21

reader: new Ext.data.JsonReader({
22

root: 'data',
23

totalProperty: 'totalCount'
24

}, [
25

{name:'PROJECT_NO', type:'string'},
26

{name:'PROJECT_NAME', type:'string'},
27

{name:'PROJECT_ALIAS', type:'string'},
28

{name:'PROJECT_DEPT_NO', type:'string'},
29

{name:'PROJECT_MANAGER', type:'string'},
30

{name:'PROJECT_LEADER', type:'string'},
31

{name:'PROJECT_CURRENT_STATUS', type:'string'},
32

{name:'PROJECT_START_DATE', type:'date'},
33

{name:'PROJECT_FINISH_DATE', type:'date'},
34

{name:'PROJECT_REAL_START_DATE', type:'date'},
35

{name:'PROJECT_REAL_FINISH_DATE',type:'date'},
36

{name:'PROJECT_MEMO', type:'string'}
37

]),
38

//groupField:'PROJECT_DEPT_NO',
39

remoteSort: true
40

});
41

ds.setDefaultSort('PROJECT_NAME', 'desc');
42

// pluggable renders
44

function renderProject(value, p, record){
45

return String.format(
47

'<img border=0 src="../Images/icons/application_view_list.png" id="btnView_{0}" style="cursor:hand" alt="浏览">    <a href="ProjectDetail.aspx?ProjectNo={0}" target="_blank"><img border=0 src="../Images/icons/application_view_list.png" style="cursor:hand" alt="编辑"></a>    <a href="ProjectDetail.aspx?ProjectNo={0}" target="_blank"><img border=0 src="../Images/icons/cross.gif" style="cursor:hand" alt="删除"></a>',
48

record.data.PROJECT_NO);
49

}
50

// the column model has information about grid columns
52

// dataIndex maps the column to the specific data field in
53

// the data store
54

var nm = new Ext.grid.RowNumberer();
55

var sm = new Ext.grid.CheckboxSelectionModel(); // add checkbox column
56

var cm = new Ext.grid.ColumnModel([nm,sm,
57

{id:'PROJECT_NO',header:"项目编号",dataIndex: 'PROJECT_NO', width: 40, align:'center'},
58

{header:"项目名称",dataIndex: 'PROJECT_NAME', width: 100,align:'left' },//,renderer: renderProject},
59

{header:"项目简称",dataIndex: 'PROJECT_ALIAS', width: 50, align:'left'},
60

{header:"部门",dataIndex: 'PROJECT_DEPT_NO', width: 50, align:'center'},
61

{header:"项目经理", dataIndex: 'PROJECT_MANAGER', width: 40, align:'center'},
62

{header:"开发经理", dataIndex: 'PROJECT_LEADER', width: 40, align:'center'},
63

{header:"当前状态",dataIndex: 'PROJECT_CURRENT_STATUS',width: 40, align:'center'},
64

{header:"预计开始日期",renderer: Ext.util.Format.dateRenderer('Y-m-d'),dataIndex: 'PROJECT_START_DATE',width: 50, align:'center'},
65

{header:"预计结束日期",renderer: Ext.util.Format.dateRenderer('Y-m-d'),dataIndex: 'PROJECT_FINISH_DATE',width: 50, align:'center'},
66

{header:"实际开始日期",renderer: Ext.util.Format.dateRenderer('Y-m-d'),dataIndex: 'PROJECT_REAL_START_DATE',width: 50, align:'center'},
67

{header:"实际结束日期",renderer: Ext.util.Format.dateRenderer('Y-m-d'),dataIndex: 'PROJECT_REAL_FINISH_DATE',width: 50, align:'center'},
68

{header:"备注",dataIndex: 'PROJECT_MEMO',width: 50, align:'left'},
69

{id:'PROJECT_NO',header:"操作",dataIndex: 'PROJECT_NO', width: 60, align:'center',renderer:renderProject,sortable: false}
70

]);
71

//hide column
73

cm.setHidden(4, !cm.isHidden(4)); //隐藏项目简称列
74

cm.setHidden(7, !cm.isHidden(7)); //隐藏开发经理列
75

cm.setHidden(13, !cm.isHidden(13)); //隐藏备注列
76

// by default columns are sortable
77

cm.defaultSortable = true;
78

var gdProjects = new Ext.grid.GridPanel({
79

frame:true,
80

collapsible: true,
81

animCollapse: false,
82

//el:'projects-grid',
83

width :965,
84

height:530,
85

title:'项目一览表',
86

iconCls: 'icon-grid',
87

renderTo: document.body,
88

store: ds,
89

cm: cm,
90

sm: sm,
91

trackMouseOver:true,
92

loadMask: {msg:'正在加载数据，请稍侯……'},
93

//loadMask: true,
94

viewConfig: {
95

forceFit:true,
96

enableRowBody:true,
97

getRowClass : function(record, rowIndex, p, ds){
98

return 'x-grid3-row-collapsed';
99

}
100

},
101

view: new Ext.grid.GroupingView({
102

forceFit:true,
103

groupTextTpl: '{text} ({[values.rs.length]}条记录)'
104

}),
105

bbar: new Ext.PagingToolbar({
106

pageSize: 25,
107

store: ds,
108

displayInfo: true,
109

displayMsg: '当前显示 {0} - {1}条记录 /共 {2}条记录',
110

emptyMsg: "无显示数据"
111

}),
112

// inline toolbars
113

tbar:[{
114

id:'btnAdd',
115

text:'新增',
116

tooltip:'新增',
117

iconCls:'add',
118

handler: showAddPanel
119

}, '-', {
120

text:'查询',
121

tooltip:'查询',
122

iconCls:'search'
123

}, '-', {
124

text:'批量删除',
125

tooltip:'删除',
126

iconCls:'remove',
127

handler:showDelDialog
128

}]
129

130

});
131

132

});

展示成果：

posted on 2008-05-05 16:06 游子阅读(1369) 评论(1) 编辑收藏举报

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