javascript - 为什么在动态加载数据时 jqGrid 不显示第二页？

Question

我准备了一个 jsFiddle，它模拟从回显页面将数据加载到 jqGrid 中。这是示例:

jqGrid Paging Example (click to run)

$(function() {
  var gridSampleData = [
      { id: 10, firstName: "Jane", lastName: "Doe1"},
      { id: 20, firstName: "Justin", lastName: "Time1" },
      { id: 30, firstName: "Jane", lastName: "Doe2"},
      { id: 40, firstName: "Justin", lastName: "Time2" },
      { id: 11, firstName: "Jane", lastName: "Doe3"},
      { id: 21, firstName: "Justin", lastName: "Time3" },
      { id: 31, firstName: "Jane", lastName: "Doe4"},
      { id: 41, firstName: "Justin", lastName: "Time4" }
    ];
  var rowsPerPage = 4;
  var numRows = gridSampleData.length;
  var pagedData = {
    page:1, total:numRows/rowsPerPage, records: numRows, rows: gridSampleData
  }

  // simulate AJAX request: use echoUrl instead of real web service 
  var jsonData = JSON.stringify(pagedData);
  var echoUrl = '/echo/js/?js=' + jsonData; 

  $("#Grid4").jqGrid({ scroll: false, gridview: true,
    pager: '#pagerGrid4', rowNum: rowsPerPage, viewrecords: true,  
    height: 90, width: 400,
    colNames: ['First name', 'Last name'],
    colModel: [{name: "firstName"}, {name: "lastName"}],
    datatype: "json",
        jsonReader: {
      page: "page",
      total: "total",
      records: "records",
      root: "rows",
      repeatitems: false
        },
    mtype: 'POST',
    url: echoUrl
  });
});

HTML:

<meta charset="utf-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<title>Canonical jqGrid example</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.4/themes/redmond/jquery-ui.min.css"/>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/free-jqgrid/4.15.2/css/ui.jqgrid.min.css"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/free-jqgrid/4.15.2/jquery.jqgrid.min.js"></script>


<table id="Grid4"></table>
<table id="pagerGrid4"></table>

一切看起来都很好，直到您单击导航按钮 - 它不会显示第二页。为什么是这样？如果您静态加载数据，如 this example 中的网格 #4| , 它工作正常。

注意:我必须使用 jsFiddle，因为 StackOverflow currently does not support an echo page在片段编辑器中。

Answer 1

这是因为在您的示例中，您将返回所有数据行，但始终发送 page: 1。网格发出的每个请求都被告知它正在获取第 1 页的数据，它永远不会获取第 2 页的数据。为了使您的示例正常工作，您可以将属性 loadonce 设置为 true ，就像我在 fork 中所做的那样你的原始代码。 Example Fiddle

或者您可以重新编写代码以发送前 4 行和 page: 1，当请求第 2 页时发送最后 4 行和 page: 2