Javascript 从json转换为数组
我正在尝试获取要在表中显示的数据。我不知道我做错了什么,但是当我从我的页面中获取数据时,它是一个由单个字符组成的数组。我可以自己分析,但我更想知道我做错了什么 我有这个php来获取数据:Javascript 从json转换为数组,javascript,php,json,Javascript,Php,Json,我正在尝试获取要在表中显示的数据。我不知道我做错了什么,但是当我从我的页面中获取数据时,它是一个由单个字符组成的数组。我可以自己分析,但我更想知道我做错了什么 我有这个php来获取数据: function BuildViewerCombo($autocomplete) { $wholeNumberCombo = array(); $dbhandle = DB_Connect(); $result = QueryForward($dbhandle, SQL
function BuildViewerCombo($autocomplete) {
$wholeNumberCombo = array();
$dbhandle = DB_Connect();
$result = QueryForward($dbhandle, SQL_WholeNumbersPartial($autocomplete));
while($wholeNumber = sqlsrv_fetch_array($result))
{
$wholeNumberCombo[] = array($wholeNumber['DocumentNbr'] => 'Number', $wholeNumber['DocumentRevision'] => 'Revision');
}
//close the connection
sqlsrv_close($dbhandle);
return $wholeNumberCombo;
}
这是从本页调用的
<?PHP
include "Scripts/DB_Functions.php5" ;
include "Scripts/SQL_Viewer.php5" ;
$wholeNumber = $_GET['wholeNumber'];
echo json_encode(BuildViewerCombo($wholeNumber));
?>
通过调用此函数:
function GetData(getType, param) {
var http = new XMLHttpRequest();
http.open("GET", 'ViewerWholeNumbers.php?wholeNumber=' + param, false);
http.setRequestHeader("Content-type","application/json");
http.onload = function() {
}
http.send('wholeNumber=' + param);
return http.responseText;
}
返回的数据是:
[{"SS3999":"Number","A":"Revision"},{"SS3999":"Number","11":"Revision"},
{"SS3999":"Number","11":"Revision"},{"SS3999":"Number","11":"Revision"},
{"SS3999":"Number","":"Revision"},{"SS3999":"Number","11":"Revision"},
{"SS3999":"Number","":"Revision"},{"SS3999":"Number","11":"Revision"},
{"SS3999":"Number","11":"Revision"},{"SS3999":"Number","A":"Revision"},
{"SS3999":"Number","11":"Revision"},{"SS3999":"Number","A":"Revision"},
{"SS3999":"Number","11":"Revision"},{"SS3999":"Number","A":"Revision"},
{"SS3999":"Number","":"Revision"}]
但是
alert('WN='+wholeNumberData.length)
返回546,当我尝试在数组中循环时,每个元素都会得到一个字符,而不是值。首先,关联数组会翻转。你需要改变
array($wholeNumber['DocumentNbr'] => 'Number', $wholeNumber['DocumentRevision'] => 'Revision');
到
为了访问JSON的元素,您需要它。然后,在循环中,使用wholeNumberData[i].Number
获取数字,使用wholeNumberData[i].Revision
获取修订
更新:
如前所述,您需要JSON.parse()
将返回字符串转换为JSON。在GetData
函数中,将return
替换为以下内容:
return JSON.parse(http.responseText);
您可以使用json_decode()函数将json转换为arrayYeah我同意,返回的数据是颠倒的。它应该是{“Number”:“SS3999”…而不是相反around@Sel:json_decode是一个php函数,我需要javascript中的数据。您需要
json.parse()
来解析字符串并将其转换为javascript中的对象数组。谢谢,我翻转了它。但是,当尝试访问这样的成员时,我会得到“未定义”:警报('Number='+wholeNumberData[1].Number);
array('Number' => $wholeNumber['DocumentNbr'], 'Revision' => $wholeNumber['DocumentRevision']);
return JSON.parse(http.responseText);