• 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}", "100px" },
        { field: "UnitsInStock", title: "Units In Stock", "100px" },
        { field: "Discontinued", "100px" },
        { command: ["edit", "destroy"], title: "&nbsp;", "160px" }]
        });
      });
    </script>
    </div>

    <style type="text/css">
    .customer-photo {
    display: inline-block;
    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

     

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  • 原文地址:https://www.cnblogs.com/ajilisiwei/p/6481914.html
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