ASP.NET MVC easyUI-datagrid 分页

本文写的是最简单的 按照API文档来写的分页。就是插件自带的分页效果。

一、html代码：field就是代表你后台数据的对应的列名。

  <table id="dg" class="easyui-datagrid" style="width: 100%; height: 400px;" data-options="nowrap:false">
                 <thead>
                     <tr>
                         <th data-options="field:'DeviceId',checkbox:true"></th>
                         <th data-options="field:'DeviceName', width:120,align:'center'" >名称</th>
                         <th data-options="field:'DeviceUnitName', width:80,align:'center'">单位</th>
                         <th data-options="field:'MakePlace', width:120,align:'center'">产地</th>
                         <th data-options="field:'BuyTime', width:120,align:'center'">购置日期</th>

                     </tr>
                 </thead>
             </table>

二丶JS代码：在js写easyUI-datagrid读取数据时候，要分页就加上 pagination: true,pageSize:10,pageList[10,20,30],表示grid要分页，每页10条，但可选10,20或者30条每页。

 $(".easyui-datagrid").datagrid({
                 rownumbers: true,
                 singleSelect: false,
                 fitColumns: false,
                 idField: 'DeviceId',
                 method: 'post',
                 url: '/Admin/Report/DeviceDetialListSearch',
                 remoteSort: false,
                 multiSort: false,
                 pagination: true,
                 pageSize: ,
                 pageList: [,,],
                 queryParams: {
                     'DeviceIdList':"",
                 'DeviceName':$("#DeviceName").combobox('getValue'),

                 },
                 onLoadSuccess: function () {
                     //$("#dg").datagrid('clearChecked');//清除复选框
                     //$("#dg").datagrid('load');
                 }
             });

三丶Controller后台读取数据 DeviceDetialListSearch()函数: Request["rows"]代表当前页面有多少行，Request["page"]代表当前页，这两个是easyUI-datagrid自带的只要用到分页，就会有这两个，不需要顾虑。recordCount代表搜索到的数据总数，这个会在Model里求出。并可在这里调用。

 public ActionResult DeviceDetialListSearch()
         {
             FADeviceInfoModel deviceInfoModel = new FADeviceInfoModel();
             int pageSize = int.Parse(Request["rows"]);
             int nowPage = int.Parse(Request["page"]);
             int recordCount = ;  //搜索条件下的总记录数量
             DataTable  dtDeviceInfo = deviceInfoModel.SearchForDetail(pageSize, nowPage,out recordCount, Request["DeviceName"], Request["startTime"], Request["endTime"]);
             return Content(MyJson.DataTableToJsonByPage(dtDeviceInfo, recordCount, ""));
         }

四、Model里SearchForDetail()函数

  public DataTable SearchForDetail(int pageSize, int nowPage, out int recordCount,string DeviceName,  string startTime, string endTime)
         {
             string sqlCondition = " ";
             if (startTime != null && !startTime.Equals(""))
                 sqlCondition += " and FADeviceInfo.ReleaseTime >= '" + startTime + " 00:00:01' ";
             if (endTime != null && !endTime.Equals(""))
                 sqlCondition += " and FADeviceInfo.ReleaseTime <= '" + endTime + " 23:59:59' ";
             if (DeviceName != null && !DeviceName.Equals(""))
                 sqlCondition += " and (FADeviceInfo.DeviceName like '%" + DeviceName + "%' or FADeviceInfo.DeviceInputCode like '%" + DeviceName + "%')";

             string sqlOrder = " order by DeviceId desc ";
             string sqlResult = " DeviceId,DeviceStatus,DeviceCode,DeviceName,DepartmentName,DeviceSpec,DeviceUnitName,OriginalValue,MakePlace,BuyTime,FinancialCode ";

             string sqlSon = "(select top " + (nowPage - ) * pageSize + " DeviceId from FADeviceInfo " + sqlOn + " where 1 = 1 " + sqlCondition + sqlOrder + ")";
             string sql = " select top " + pageSize + sqlResult + " from FADeviceInfo  " + sqlOn + " where DeviceId not in " + sqlSon + sqlCondition + sqlOrder;
             string sqlCount = "select count(*) from FADeviceInfo " + sqlOn + " where 1 = 1 " + sqlCondition;

             DataTable dataTable = new DataTable();
             dataTable = db.MyExecuteQuery(sql);
             recordCount =db.GetCount(sqlCount);
             return dataTable;
         }

五、table转Json的函数DataTableToJsonByPage()，最下面添加Footer，如果你用不到页脚，就是统计总合计的，可以设置参数footer=“”,就OK了。

  public static string DataTableToJsonByPage(DataTable dt, int total, string footer)
         {
             StringBuilder jsonBuilder = new StringBuilder();
             //添加表格总行数
             jsonBuilder.Append("{\"total\":" + total + ",\"rows\":");
             //添加行数据
             jsonBuilder.Append("[");
             for (int i = ; i < dt.Rows.Count; i++)
             {
                 jsonBuilder.Append("{");
                 for (int j = ; j < dt.Columns.Count; j++)
                 {
                     jsonBuilder.Append("\"");
                     jsonBuilder.Append(dt.Columns[j].ColumnName);
                     jsonBuilder.Append("\":\"");
                     jsonBuilder.Append(dt.Rows[i][j].ToString());
                     jsonBuilder.Append("\",");
                 }
                 jsonBuilder.Remove(jsonBuilder.Length - , );
                 jsonBuilder.Append("},");
             }
             if (dt.Rows.Count != )
             {
                 jsonBuilder.Remove(jsonBuilder.Length - , );
             }
             jsonBuilder.Append("]");
             //添加Footer
             jsonBuilder.Append(",\"footer\":[");
             jsonBuilder.Append(footer);
             jsonBuilder.Append("]}");

             jsonBuilder = jsonBuilder.Replace("\n", "").Replace("\r", "");
             return jsonBuilder.ToString();
         }