jqgrid 分页（基于ashx）

1:数据库表创建并往中插入200000条数据：

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CREATE TABLE [dbo].[T_School](

[ID] [int] IDENTITY(1,1) NOT NULL,

[SchoolName] [nvarchar](255) COLLATE Chinese_PRC_CI_AS NULL,

[BuildDate] [datetime] NULL,

[Address] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL,

[IsSenior] [bit] NULL,

[StudentNum] [int] NULL,

CONSTRAINT [PK_T_School] PRIMARY KEY CLUSTERED

(

[ID] ASC

)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

) ON [PRIMARY]

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2:myJqgrid.js封装后的JqGird代码：

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* 返回json格式中最好默认带有ID列

默认显示 20列

* 列表id = "gridTable"

列表url = 'Handler.ashx?action=page'

列表datatype = 'json'

列表colNames = ['ID', "名称", '性别', '手机', '邮箱']

列表colModel = 。。。

列表标题 caption = "用户列表"

列表修改URL editurl = "Handler.ashx?action=oper"

列表默认排序 sortname = "ID";

页码ID gridPagerID = "gridPager"

//最后选中的行

var lastsel;

function myJqGrid(id, url, datatype, colNames, colModel, caption, editurl, sortname, gridPagerID) {

var myGrid = $("#" + id);

myGrid.jqGrid({

url: url,

datastr: "data.json",

datatype: datatype,

rowNum: 20,

rowList: [10, 20, 50],

colNames: colNames,

colModel: colModel,

jsonReader: {

repeatitems: false,

root: function (obj) { return obj.rows; },

page: function (obj) { return obj.pageindex; },

total: function (obj) { return obj.pagecount; },

records: function (obj) { return obj.total; }

prmNames: {

page: 'PageIndex',

rows: 'PageSize',

sort: 'Order',

order: 'Sort'

hidegrid: false,

rownumbers: true,

loadonce: false,

sortname: sortname,

sortorder: 'desc',

pager: "#" + gridPagerID,

viewrecords: true,

caption: caption,

toolbar: [true, "top"],

altRows: true,

//最后选中的行

onSelectRow: function (id) {

if (id && id !== lastsel) {

grid.jqGrid('restoreRow', lastsel);

lastsel = grid.jqGrid('getRowData', id)[sortname];

}

editurl: editurl

});

}

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其中要注意这两部分的参数，其中pagecount-json中代表页码总数的数据,total-json中代表数据行总数的数据,pageindex-json中代表当前页码的数据;prmNames则是重命名传到后台的分页参数名称；

传到后台的URL:GET /CountryHandler.ashx?_search=false&nd=1397394772871&PageSize=20&PageIndex=1&Order=ID&Sort=desc

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jsonReader: {

repeatitems: false,

root: function (obj) { return obj.rows; },

page: function (obj) { return obj.pageindex; },

total: function (obj) { return obj.pagecount; },

records: function (obj) { return obj.total; }

prmNames: {

page: 'PageIndex',

rows: 'PageSize',

sort: 'Order',

order: 'Sort'

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3:Html代码及JS代码：

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$(document).ready(function () {

showJqGrid();

});

function showJqGrid() {

var id = "gridTable";

var url = "CountryHandler.ashx";

var datatype = "json";

var colNames = ["ID", "名称","地址"];

var colModel = [

{ name: "ID", index: "ID"},

{

name: "SchoolName", index: "SchoolName", width: 200, align: "center"

{

name: "Address", index: "Address", width: 250, align: "center"

}

];

var caption = "学校列表";

var editurl = "CountryHandler.ashx";

var sortname = "ID";

var gridPagerID = "gridPager";

myJqGrid(id, url, datatype, colNames, colModel, caption, editurl, sortname, gridPagerID);

//initToolbar(id, gridPagerID);

}

</script>

</head>

<body>

</table>

</p>

</form>

</body>

</html>

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4:后台的一般处理文件CountryHandler.ashx代码：

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using System.Web.Script.Serialization;

using ClassLibrary1;

using DAL;

namespace WebApplication1

{

/// <summary>

/// CountryHandler 的摘要说明

/// </summary>

public class CountryHandler : IHttpHandler

{

public void ProcessRequest(HttpContext context)

{

DAL.TestDbEntities contexts = new TestDbEntities();

context.Response.ContentType = "text/plain";

var quey = from School in contexts.T_School select School;

GridDatas model = new GridDatas();

int PageIndex= RequstString("PageIndex").Length == 0 ? 1 : int.Parse(RequstString("PageIndex"));

int PageSize=RequstString("PageSize").Length == 0 ? 20 : int.Parse(RequstString("PageSize"));

int TotalCount=quey.Count<T_School>();

model.pagecount = (TotalCount/PageSize).ToString();

model.pageindex = PageIndex.ToString();

model.total = TotalCount.ToString();

model.rows = quey.OrderBy(t=>t.ID).Skip((PageIndex - 1) * PageSize).Take(PageSize).ToList();

JavaScriptSerializer serializer = new JavaScriptSerializer();

string Resul = serializer.Serialize(model);

context.Response.Write(Resul);

}

public static string RequstString(string sParam)

{

return (HttpContext.Current.Request[sParam] == null ? string.Empty

: HttpContext.Current.Request[sParam].ToString().Trim());

}

public bool IsReusable

{

get

{

return false;

}

public class GridDatas

{

public string pageindex { set; get; }

public string pagecount { get; set; }

public string total { get; set; }

public List<T_School> rows { get; set; }

}

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注意：同样借实体类GridDatas来实同JqGrid要求的JSON格式；转化成后的Json代码如下:

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{"pageindex":"1","pagecount":"10000","total":"200000","rows":[{"RelationshipManager":{},"ID":1,"SchoolName":"中学教育0","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":2,"SchoolName":"中学教育1","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":3,"SchoolName":"中学教育2","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":4,"SchoolName":"中学教育3","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":5,"SchoolName":"中学教育4","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":6,"SchoolName":"中学教育5","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":7,"SchoolName":"中学教育6","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":8,"SchoolName":"中学教育7","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":9,"SchoolName":"中学教育8","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":10,"SchoolName":"中学教育9","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":11,"SchoolName":"中学教育10","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":12,"SchoolName":"中学教育11","BuildDate":"\/Date

(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":13,"SchoolName":"中学教育踏浪帅

12","BuildDate":"\/Date(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":355},{"RelationshipManager":{},"ID":14,"SchoolName":"中学教育

13","BuildDate":"\/Date(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":15,"SchoolName":"中学教育

14","BuildDate":"\/Date(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":16,"SchoolName":"中学教育

15","BuildDate":"\/Date(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":17,"SchoolName":"中学教育

16","BuildDate":"\/Date(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390},{"RelationshipManager":{},"ID":18,"SchoolName":"中学教育

17","BuildDate":"\/Date(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":456},{"RelationshipManager":{},"ID":19,"SchoolName":"中学教育踏

浪帅18","BuildDate":"\/Date(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":456},{"RelationshipManager":{},"ID":20,"SchoolName":"中学教

育19","BuildDate":"\/Date(1393940972000)\/","Address":"厦门软件园","IsSenior":true,"StudentNum":390}]}

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