Jquery树形网格（jqgrid）子项的xml结构

Question

谁能告诉我 jqgrid 使用的子项目的 XML 结构。 我已阅读文档，但它没有清楚地解释如何创建包含子项的树视图。 基本上我有一个 2 列网格，3 个级别。

Answer 1

来自演示：
http://www.trirand.com/jqgrid35/jqgrid.html

（根据新在版本 3.3-> 树网格中）

它使这个 ajax 调用作为一个帖子：
http://www.trirand.com/jqgrid35/server.php?q=树

post参数看起来像：

_search: false
n_left: 1
n_level: 0
n_right: 8
nd: 1241000465087
nodeid: 1
page: 1
rows: 20
sidx    
sord: asc

它返回的正是这样的：

<?xml version='1.0' encoding='utf-8'?>
<rows>
<page>1</page>
<total>1</total>
<records>1</records>
<row><cell>1</cell><cell>Cash</cell><cell>100</cell><cell>400.00</cell<cell>250.00</cell><cell>150.00</cell><cell>0</cell><cell>1</cell><cell>8</cell><cell>false</cell><cell>false</cell></row>
<row><cell>5</cell><cell>Bank's</cell><cell>200</cell><cell>1500.00</cell><cell>1000.00</cell><cell>500.00</cell><cell>0</cell><cell>9</cell><cell>14</cell><cell>false</cell><cell>false</cell></row>
<row><cell>8</cell><cell>Fixed asset</cell><cell>300</cell><cell>0.00</cell<cell>1000.00</cell><cell>-1000.00</cell><cell>0</cell><cell>15</cell><cell>16</cell><cell>true</cell><cell>false</cell></row>
</rows>

对于每个子行，它都会进行另一个ajax调用。 第一个“单元格”元素指定行号。 当下一行 id 之前有一个间隙时，它知道它有子项，并将为该行放置一个扩展器。 当用户选择扩展器时，它会进行另一个 ajax 调用，并返回以下内容：

<?xml version='1.0' encoding='utf-8'?>
<rows>
<page>1</page>
<total>1</total>
<records>1</records>
<row><cell>2</cell><cell>Cash 1</cell><cell>1</cell><cell>300.00</cell><cell>200.00</cell><cell>100.00</cell><cell>1</cell><cell>2</cell><cell>5</cell><cell>false</cell><cell>false</cell></row>
<row><cell>4</cell><cell>Cash 2</cell><cell>2</cell><cell>100.00</cell><cell>50.00</cell><cell>50.00</cell><cell>1</cell><cell>6</cell><cell>7</cell><cell>true</cell><cell>false</cell></row>
</rows>

查看源代码，它指定列名称，并期望它们按顺序返回。 我很确定您可以编写此代码而不期望特定的顺序，但这就是映射的设置方式。 这几乎是 ext 做事方式的克隆，这是一个很好的遵循方式，因为他们做得很好。

jQuery("#treegrid").jqGrid({
    url: 'server.php?q=tree',
    treedatatype: "xml",
    mtype: "POST",
    colNames:["id","Account","Acc Num", "Debit", "Credit","Balance"],
    colModel:[
        {name:'id',index:'id', width:1,hidden:true,key:true},
        {name:'name',index:'name', width:180},
        {name:'num',index:'acc_num', width:80, align:"center"},
        {name:'debit',index:'debit', width:80, align:"right"},      
        {name:'credit',index:'credit', width:80,align:"right"},     
        {name:'balance',index:'balance', width:80,align:"right"}        
    ],
    height:'auto',
    pager : jQuery("#ptreegrid"),
    imgpath: gridimgpath,
    treeGrid: true,
    ExpandColumn : 'name',
    caption: "Treegrid example"
});

并且，为了完整起见，让我们包括 PHP 源示例（经历了这么多麻烦，不妨结束它！）：

$node = (integer)$_REQUEST["nodeid"];
// detect if here we post the data from allready loaded tree
// we can make here other checks
if( $node >0) {
    $n_lft = (integer)$_REQUEST["n_left"];
    $n_rgt = (integer)$_REQUEST["n_right"];
    $n_lvl = (integer)$_REQUEST["n_level"];

    $n_lvl = $n_lvl+1;
    $SQL = "SELECT account_id, name, acc_num, debit, credit, balance, level, lft, rgt FROM accounts WHERE lft > ".$n_lft." AND rgt < ".$n_rgt." AND level = ".$n_lvl." ORDER BY lft";
} else { 
    // initial grid
    $SQL = "SELECT account_id, name, acc_num, debit, credit, balance, level, lft, rgt FROM accounts WHERE level=0 ORDER BY lft";
}
$result = mysql_query( $SQL ) or die("Couldn t execute query.".mysql_error());
if ( stristr($_SERVER["HTTP_ACCEPT"],"application/xhtml+xml") ) {
header("Content-type: application/xhtml+xml;charset=utf-8"); } else {
header("Content-type: text/xml;charset=utf-8");
}
$et = ">";
echo "<?xml version='1.0' encoding='utf-8'?$et\n";
   echo "<rows>";
echo "<page>1</page>";
echo "<total>1</total>";
echo "<records>1</records>";
// be sure to put text data in CDATA
while($row = mysql_fetch_array($result,MYSQL_ASSOC)) {
    echo "<row>";           
    echo "<cell>". $row[account_id]."</cell>";
    echo "<cell>". $row[name]."</cell>";
    echo "<cell>". $row[acc_num]."</cell>";
    echo "<cell>". $row[debit]."</cell>";
    echo "<cell>". $row[credit]."</cell>";
    echo "<cell>". $row[balance]."</cell>";
    echo "<cell>". $row[level]."</cell>";
    echo "<cell>". $row[lft]."</cell>";
    echo "<cell>". $row[rgt]."</cell>";
    if($row[rgt] == $row[lft]+1) $leaf = 'true';else $leaf='false';
    echo "<cell>".$leaf."</cell>";
    echo "<cell>false</cell>";
    echo "</row>";
}
echo "</rows>";