[转载]jqGrid + JSON + WebService 完整示例 – 瑞雪年 – 博客园.
真没找到这样的例子,于是自已写了个,分享出来。
第一步,首先在WebService上,添加[System.Web.Script.Services.ScriptService]属性标签,让WebServer支持JSON.
namespace jqGrid_JSON_WebService_Sample.Services { /// <summary> /// Summary description for WebServiceGrid /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. [System.Web.Script.Services.ScriptService] public class WebServiceGrid : System.Web.Services.WebService { } }
接着,添加ajax调用的后端代码,获取数据,返回JSON对象:
[WebMethod] public object Grid(bool? _search, string nd, int page, int rows, string sidx, string sord, string searchField, string searchString, string searchOper) { int count; var data = dc.Query(string.IsNullOrWhiteSpace(searchField) ? null : new string[] { searchField }, new string[] { searchOper }, new object[] { searchString }, null, new string[] { string.IsNullOrWhiteSpace(sidx) ? "IssueID" : sidx }, new string[] { sord }, (page - 1) * rows, rows, out count); return (new { total = Math.Ceiling((float)count / (float)rows), page = page, records = count, rows = data.Select(item => new { id = item.IssueID, cell = new object[] { item.IssueID, item.Title, item.Description, item.Progress, item.CreateTime, item.Locked } }) }); }
第二步,添加前台页面,首先添加各种的js,css引用,然后添加jqGrid所需的
和js代码:
<script type="text/javascript" src="/Scripts/jquery-1.7.1.min.js"></script><script type="text/javascript" src="/Scripts/jquery-ui-1.8.11.min.js"></script> <script type="text/javascript" src="/Scripts/i18n/grid.locale-en.js"></script><script type="text/javascript" src="/Scripts/jquery.jqGrid.min.js"></script> <script type="text/javascript">// <![CDATA[ $(function () { $("#list #grid").jqGrid( { url: '/Services/WebServiceGrid.asmx/Grid', mtype: 'POST', ajaxGridOptions: { contentType: 'application/json; charset=utf-8' }, serializeGridData: function (postData) { if (postData.searchField === undefined) postData.searchField = null; if (postData.searchString === undefined) postData.searchString = null; if (postData.searchOper === undefined) postData.searchOper = null; return JSON.stringify(postData); }, jsonReader: { root: "d.rows", page: "d.page", total: "d.total", records: "d.records" }, datatype: "json", colNames: [ 'IssueID', 'Title', 'Description', 'Progress', 'CreateTime', 'Locked' ], colModel: [ { name: 'IssueID', width: 100, index: 'IssueID' }, { name: 'Title', width: 100, index: 'Title' }, { name: 'Description', width: 300, index: 'Description' }, { name: 'Progress', width: 150, index: 'Progress' }, { name: 'CreateTime', width: 100, index: 'CreateTime', formatter:'date', sorttype:'datetime', datefmt:'M d h:i' }, { name: 'Locked', width: 100, index: 'Locked' } ], rowNum: 10, rowList: [10, 15, 20, 25, 40], pager: '#pager', viewrecords: true, sortorder: "desc", width: 900, height: 240, }); $("#list #grid").jqGrid('navGrid', '#pager', { edit: false, add: false, del: false }); }); // ]]></script> </div> <div id="list"> <div id="pager"></div>
注意jqGrid函数据前面的部分代码:
url: '/Services/WebServiceGrid.asmx/Grid', mtype: 'POST', ajaxGridOptions: { contentType: 'application/json; charset=utf-8' },
通过url指定WebService方法,mtype指定使用POST方法,contentType指定为json,这样WebService才会返回json对象。
可是,返回的数据是放在一个属性名为d的对象里,所以还要添加 jsonReader,来作数据映射:
jsonReader: { root: "d.rows", page: "d.page", total: "d.total", records: "d.records" },
最后,为了保证查询时能够POST正确的参数,还要对POST的参数值进行检查:
serializeGridData: function (postData) { if (postData.searchField === undefined) postData.searchField = null; if (postData.searchString === undefined) postData.searchString = null; if (postData.searchOper === undefined) postData.searchOper = null; return JSON.stringify(postData); },
到此,一个完整的jqGrid示例就完成了,成果展示: