System.web.mvc.JsonResult 类
JsonResult ：代码简洁，返回的是与拼接一样的 json格式的数据
[HttpPost]
public JsonResult GetStoried(int ID)
{IList<BuildingNumber> buildingNumber = BuildingNumberBusiness.GetBuildingNumberByStreetalleyID( ID);
return Json(buildingNumber);
}
这种方式代码复杂，写起来花费时间相对也多些
[HttpPost]
[HttpPost]
public string GetStoried(int ID)
{
StringBuilder sbJson = new StringBuilder();
IList<BuildingNumber> buildingNumber = BuildingNumberBusiness.GetBuildingNumberByStreetalleyID( ID);
sbJson.Append("[");
sbJson.Append("{\"id\":\"" + "" + "\",\"text\":\"" + "--请选择--" + "\"},");
foreach (BuildingNumber list in buildingNumber)
{
sbJson.Append("{\"id\":\"" + list.BuildingNumberID.ToString() + "\",\"text\":\"" + list.BNName.Trim() + "\"},");
}
sbJson.Remove(sbJson.Length - 1, 1);//删除最后一个逗号
sbJson.Append("]");
return sbJson.ToString();
}