JSON 回调未被调用
以下代码在 v1.3 中有效，但在 1.4 中无效，我似乎无法弄清楚问题是什么。我正在从省份 ddl 中选择构建一个城市 ddl。我正在使用 ASP.NET MVC 2
服务器上的函数被调用并构建正确的列表，但当它返回时，它永远不会进入回调函数。我已经设置了一些警报，但没有接到电话。除了 getJSON 之前的那个
有人知道我做错了什么吗？
$(函数(){
var provinces = $("#ProvinceId");
var cities = $("#CityId");
provinces.change(function () {
cities.find('option').remove();
alert("hello outside JSON call");
$.getJSON('<%= Url.Content("~/HomeController/Cities") %>', { province: provinces.val(), includeAllPlaceholder : true }, function (data) {
alert("hello");
$(data).each(function () {
alert("hello 2");
$("<option value=" + this.Value + ">" + this.Text + "</option>").appendTo(cities);
alert(this.Value + ":" + this.Text);
});
});
});
});
在控制器中
public JsonResult Cities(string province, bool includeAllPlaceholder)
{
List<SelectListItem> items = new List<SelectListItem>();
int provinceId;
if (int.TryParse(province, out provinceId))
{
var values = ReferenceTableService.CitiesInProvince(provinceId).Where(f => includeAllPlaceholder || (includeAllPlaceholder == false && f.IsAllPlaceholderEntry == false)).ToList();
values.Sort();
items.Add(new SelectListItem { Value = "", Text = Resources.Global.Generic.ddlSelectValue });
items.AddRange(values.Select(f => new SelectListItem { Value = f.Id.ToString(), Text = f.Name }));
}
return Json(items);
}
感谢
TR
The following code has worked in v1.3 but not 1.4 I can't seem to figure out what the issue is. I'm building a cities ddl from a selection from the province ddl. I'm using ASP.NET MVC 2
The function on the server gets called and it builds up the correct list, but when it returns it never steps into the callback function. I've put in some alerts, and the don't get called. except for the one before the getJSON
Anyone know what I'm doing wrong?
$(function () {
var provinces = $("#ProvinceId");
var cities = $("#CityId");
provinces.change(function () {
cities.find('option').remove();
alert("hello outside JSON call");
$.getJSON('<%= Url.Content("~/HomeController/Cities") %>', { province: provinces.val(), includeAllPlaceholder : true }, function (data) {
alert("hello");
$(data).each(function () {
alert("hello 2");
$("<option value=" + this.Value + ">" + this.Text + "</option>").appendTo(cities);
alert(this.Value + ":" + this.Text);
});
});
});
});
in the controller
public JsonResult Cities(string province, bool includeAllPlaceholder)
{
List<SelectListItem> items = new List<SelectListItem>();
int provinceId;
if (int.TryParse(province, out provinceId))
{
var values = ReferenceTableService.CitiesInProvince(provinceId).Where(f => includeAllPlaceholder || (includeAllPlaceholder == false && f.IsAllPlaceholderEntry == false)).ToList();
values.Sort();
items.Add(new SelectListItem { Value = "", Text = Resources.Global.Generic.ddlSelectValue });
items.AddRange(values.Select(f => new SelectListItem { Value = f.Id.ToString(), Text = f.Name }));
}
return Json(items);
}
thanks
TR
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来自 api.jquery.com
From api.jquery.com
感谢大家的帮助。事实证明我需要将
JsonRequestBehavior.AllowGet添加到我的返回语句中*叹息
thanks for all the help folks. turns out I needed to add in
JsonRequestBehavior.AllowGetto my return statement*sigh