jQuery中ajax调用当前页面方法

$.ajax({
type: 'POST',
url: 'AddressManager.aspx/GetProvince',//AddressManager.aspx当前页面
data: '{cache:0}',
dataType: 'json',
contentType: 'application/json; charset=utf-8',
cache: false,
async: false,
success: function (data) {
var arr = data.d;
$("#selProvince").empty();
$("#selProvince").append("<option selected='selected' value=''>省</option>");
for (var i = 0; i < arr.length ; i++) {
$("#selProvince").append($("<option></option>").val(arr[i]).html(arr[i]));
}
$("#selCity").empty();
$("#selArea").empty();
$("#selCity").append("<option selected='selected' value=''>市</option>");
$("#selArea").append("<option selected='selected' value=''>区</option>");
},
error: function (event, request, settings) {
// window.location.reload();
}
});

[WebMethod]
public static List<string> GetProvince(int cache)
{
ProvinceCityAreaBLL provinceCityAreaBLL = new ProvinceCityAreaBLL();
DataSet ds = provinceCityAreaBLL.GetProvince();
List<string> list = ds.Tables[0].AsEnumerable().Select(x => x.Field<string>("province")).ToList();
return list;
}