Question

ajax读取json显示undefined

function AjaxGetData(index, size) {
　　 $.ajax({
　　 url: "<%=basePath%>Inventory/depotWarnlistajax",
　　 type: "get",
　　 data: "pagenum=" + index + "&pagesize=" + size,
　　 //dataType: "json",
//contentType: "application/JSON",
　　 success: function (warns) {
alert(warns);　
　 var html = "";
warns=eval("(" + warns + ")");
　　 for(var i=0;i<warns.length;i++){
　　 html += "<tr>";
　　 html += "<td>"+warns[i].Prod_No+"</td>";
　　 html += "<td>"+warns[i].Prod_Name+"</td>";
　　 html += "<td>"+warns[i].Prot_Name+"</td>";
　　 html += "<td>"+warns[i].Prod_Model+"</td>";
　 html += "<td>"+warns[i].Prod_Unit+"</td>";
　　 html += "<td>"+warns[i].Inventory_Num+"</td>";
　　 html += "<td>"+warns[i].ProMin+"</td>";
html += "<td>"+warns[i].ProMax+"</td>";
　　 html += "</tr>";
　　 }
warns中的数据如下：
[{"supp_Id":"2","prod_No":"1","prod_Name":"钢笔","prod_Model":"小型","prod_Unit":"往往外","proT_ID":"1","proMin":"2","proMax":"6","prod_Status":"0","prod_Remark":"2","prod_Ucers":"2","prod_Prices":2,"prot_Name":"圆珠笔","inventory_Num":"1.0"},{"supp_Id":"2","prod_No":"2","prod_Name":"1","prod_Model":"1","prod_Unit":"1","proT_ID":"1","proMin":"2","proMax":"8","prod_Status":"0","prod_Remark":"2","prod_Ucers":"2","prod_Prices":2,"prot_Name":"圆珠笔","inventory_Num":"10.0"}]

说明json中是有值的，可是warns[i].Prod_No为undefined。这是为什么呢。

Answer 1

<script type="text/javascript">
var a = '[{"supp_Id":"2","prod_No":"1","prod_Name":"钢笔","prod_Model":"小型","prod_Unit":"往往外","proT_ID":"1","proMin":"2","proMax":"6","prod_Status":"0","prod_Remark":"2","prod_Ucers":"2","prod_Prices":2,"prot_Name":"圆珠笔","inventory_Num":"1.0"},{"supp_Id":"2","prod_No":"2","prod_Name":"1","prod_Model":"1","prod_Unit":"1","proT_ID":"1","proMin":"2","proMax":"8","prod_Status":"0","prod_Remark":"2","prod_Ucers":"2","prod_Prices":2,"prot_Name":"圆珠笔","inventory_Num":"10.0"}]';

var b = eval('(' + a + ')');

for(var i=0;i<b.length;i++){
    alert(b[i].prod_No);
}
</script>

我测试了你的代码，确实是可以alert出值的，和大小写有没有关系呢，因为我发现你的json数据和处理函数的大小写不一样。