js关于从数据库取数据动态给下拉框默认选择项赋值问题

2016-10-07 11:57:20 721 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Ubuntu升级遇到grub-efi-amd64-signed报错？3步搞定这个烦人的EFI目录问题本文详细解析了Ubuntu系统升级时遇到的“grub-efi-amd64-signed”报错及“cannot find EFI directory”问题。通过剖析UEFI启动机制与EFI系统分区原理，提供了从诊断到修复的三步解决方案，帮助用户快速解决因EFI目录未挂载导致的升级中断，确保系统引导正常。阅读详情

json数据如下：
{
"code": 200,
"msg": "执行成功！",
"data": {
"list_supply": [
{
"supply_id": "1",
"supply_name": "肉类供应商"
},
{
"supply_id": "2",
"supply_name": "果蔬供应商"
},
{
"supply_id": "12",
"supply_name": "优良食品有限公司"
}
],
"list_section": [
{
"section_id": "230",
"breif": "招标大米第一标段"

},
{
"section_id": "231",
"breif": "招标大米第二标段"

},
{
"section_id": "232",
"breif": "招标大米第三标段"
}
],
"list_supply_school": [
{
"supply_id": "1",
"section_id": "231",
"supply_name": "肉类供应商",
"section_name": "招标大米第二标段"
},
{
"supply_id": "2",
"section_id": "232",
"supply_name": "果蔬供应商",
"section_name": "招标大米第三标段"
},
{
"supply_id": "12",
"section_id": "230",
"supply_name": "优良食品有限公司",
"section_name": "招标大米第一标段"
}
],
"select_limit": 1
}
}
我的想法是做一个标段列表（列表数据在list_section里），每个标段可以选择供应商（选择供应商是下拉框形式选择，在list_supply数据里），这些都做出来了，但是现在我想，将标段选择供应商的默认选项是list_supply_school里对应的内容，也就是说section_id =231的默认选择是肉类供应商，求大神告知，谢谢！

下面是我写的代码：
<script>
var jsons = {
"code": 200,
"msg": "执行成功！",
"data": {
"list_supply": [{
"supply_id": "1",
"supply_name": "肉类供应商"
}, {
"supply_id": "2",
"supply_name": "果蔬供应商"
}, {
"supply_id": "12",
"supply_name": "优良食品有限公司"
}],
"list_section": [{
"section_id": "230",
"breif": "招标大米第一标段",
"dep_id": "86"

}, {
"section_id": "231",
"breif": "招标大米第二标段",
"dep_id": "86"

}, {
"section_id": "232",
"breif": "招标大米第三标段",
"dep_id": "86"
}],
"list_supply_school": [{
"supply_id": "1",
"section_id": "231",
"supply_name": "肉类供应商",
"section_name": "招标大米第二标段"
}, {
"supply_id": "2",
"section_id": "232",
"supply_name": "果蔬供应商",
"section_name": "招标大米第三标段"
}, {
"supply_id": "12",
"section_id": "230",
"supply_name": "优良食品有限公司",
"section_name": "招标大米第一标段"
}],
"select_limit": 1
}
};
var arr1 = [];
for(var i = 0, L = jsons.data.list_section.length; i < L; i++) {
var Breif = jsons.data.list_section[i].breif;
var section_id = jsons.data.list_section[i].id;
var dep_id = jsons.data.list_section[i].dep_id;
//alert(dep_id);
var arr2 = [];
for(var j = 0, K = jsons.data.list_supply.length; j < K; j++) {
var supply_name = jsons.data.list_supply[j].supply_name;
var supply_id = jsons.data.list_supply[j].supply_id;
//alert(supply_id);
arr2.push("<option value='" + supply_id + "'>" + supply_name + "</option>");
}

arr1.push("<ul class='mui-table-view mui-table-view-striped mui-table-view-condensed'><li class='mui-table-view-cell'><div class='mui-table'><div id='info' class='mui-table-cell mui-col-xs-10'><h4 class='mui-ellipsis'>" + Breif + "</h4><div class='mui-h5'>选供应商：</div><div class='mui-content-padded'><select id=" + section_id + " style='background-color: lightyellow;' name='section_info_school[ " + dep_id + "-" + section_id + "]' class='mui-btn mui-btn-block'><option value='' class='do' ></option>" + arr2 + "</select></div></div><div class='mui-table-cell mui-col-xs-2 mui-text-right'></div></div></li></ul>");
document.getElementById("opt").innerHTML = arr1.join('');
var sel = document.getElementById(section_id);
//alert(sel.options.length);
for(var m = 0; m < sel.options.length; m++) {
var list = jsons.data.list_supply_school; //
//console.log(list);
//alert(list.length);
for(var n = 0, L = list.length; n < L; n++) {
var temp_name = list[n].supply_name;
var temp_id = list[n].section_id;
if(temp_id == section_id) {
hidden = temp_name;
alert(hidden);
if(sel.options[m].innerHTML == hidden) {
sel.options[m].selected = "selected";
break;
}
}
} //
}
}
</script>

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