Asp.net MVC 控制器扩展方法实现jsonp
项目需要,在使用KendoUI,又涉及到jsonp数据格式的处理,网上看到这样一种实现方法,在此小记一下(其实是因为公司里只能上博客园等少数网站,怕自己忘了,好查看一下,哈哈哈)
1. 新建控制器扩展类 ContollerExtensions.cs
public static class ContollerExtensions
{
public static JsonpResult Jsonp(this Controller controller, object data)
{
JsonpResult result = new JsonpResult()
{
Data = data,
JsonRequestBehavior = JsonRequestBehavior.AllowGet
};
return result;
}
}
2.新建JsonpResult类,并继承JsonResult
public class JsonpResult : JsonResult
{
private static readonly string JsonpCallbackName = "callback";
private static readonly string CallbackApplicationType = "application/json";
public override void ExecuteResult(ControllerContext context)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if ((JsonRequestBehavior == JsonRequestBehavior.DenyGet) &&
String.Equals(context.HttpContext.Request.HttpMethod, "GET"))
{
throw new InvalidOperationException();
}
var response = context.HttpContext.Response;
if (!String.IsNullOrEmpty(ContentType))
response.ContentType = ContentType;
else
response.ContentType = CallbackApplicationType;
if (ContentEncoding != null)
response.ContentEncoding = this.ContentEncoding;
if (Data != null)
{
String buffer;
var request = context.HttpContext.Request;
var serializer = new JavaScriptSerializer();
if (request[JsonpCallbackName] != null)
buffer = String.Format("{0}({1})", request[JsonpCallbackName], serializer.Serialize(Data));
else
buffer = serializer.Serialize(Data);
response.Write(buffer);
}
}
}
3.在控制器中使用
public class ProductsController : Controller
{
private static List<Product> products = new List<Product>()
{
new Product(){ProductID=10,ProductName="testPro1",UnitPrice=12,UnitsInStock=12,Discontinued=false},
new Product(){ProductID=11,ProductName="testPro2",UnitPrice=1,UnitsInStock=12,Discontinued=false},
new Product(){ProductID=12,ProductName="testPro3",UnitPrice=17,UnitsInStock=12,Discontinued=true},
new Product(){ProductID=13,ProductName="testPro4",UnitPrice=22,UnitsInStock=12,Discontinued=false}
};
public ActionResult Index()
{
return View();
}
public JsonResult List()
{
return this.Jsonp(products);
}
}
4.对应的视图,这里用了kendui的grid接收数据
@{
ViewBag.Title = "Grid Demo1";
}
<link href="~/Content/kendoui/examples-offline.css" rel="stylesheet" />
<link href="~/Content/kendoui/styles/kendo.common.min.css" rel="stylesheet" />
<link href="~/Content/kendoui/kendo.rtl.min.css" rel="stylesheet" />
<link href="~/Content/kendoui/styles/kendo.default.min.css" rel="stylesheet" />
<script src="~/Content/kendoui/js/jquery.min.js"></script>
<script src="~/Content/kendoui/js/kendo.view.min.js"></script>
<script src="~/Content/kendoui/console.js"></script>
<script src="~/Content/kendoui/js/kendo.all.min.js"></script>
<div id="example">
<div id="grid"></div>
<script>
$(document).ready(function () {
$("#grid").kendoGrid({
dataSource: {
type: "jsonp",
transport: {
read: "/Products/List"
},
pageSize: 20,
schema: {
model: {
id: "ProductID",
fields: {
ProductID: { editable: false, nullable: true },
ProductName: { validation: { required: true } },
UnitPrice: { type: "number", validation: { required: true, min: 1 } },
Discontinued: { type: "boolean" },
UnitsInStock: { type: "number", validation: { min: 0, required: true } }
}
}
}
},
height: 550,
groupable: true,
sortable: true,
pageable: {
refresh: true,
pageSizes: true,
buttonCount: 5
},
columns: [
{ field: "ProductName", title: "Product Name" },
{ field: "UnitPrice", title: "Unit Price", format: "{0:c}", width: "100px" },
{ field: "UnitsInStock", title: "Units In Stock", width: "100px" },
{ field: "Discontinued", width: "100px" },
{ command: ["edit", "destroy"], title: " ", width: "160px" }]
});
});
</script>
</div>
<style type="text/css">
.customer-photo {
display: inline-block;
width: 32px;
height: 32px;
border-radius: 50%;
background-size: 32px 35px;
background-position: center center;
vertical-align: middle;
line-height: 32px;
box-shadow: inset 0 0 1px #999, inset 0 0 10px rgba(0,0,0,.2);
margin-left: 5px;
}
.customer-name {
display: inline-block;
vertical-align: middle;
line-height: 32px;
padding-left: 3px;
}
</style>
5.结果如下