[转载]jqGrid + JSON + WebService 完整示例

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[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>

&nbsp;

[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 =&gt; 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:


完整示例代码:jqGrid_JSON_WebService_Sample.zip

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