从MVC 3中的ActionResult类型方法返回一个JSon数组到$ .ajax

我有一个TreeView帮助器，它包含类别列表及其链接。 我这样做了

@helper TreeView(FavouriteLinksXmlMVC3.Controllers.HomeController cat) { cat = new FavouriteLinksXmlMVC3.Controllers.HomeController(); try { foreach(FavouriteLinksXmlMVC3.Models.CategoriesControl list_category in cat.Categories) { 
 @list_category.Name @if(list_category.hasChild) { 
 @foreach(var links in list_category.Links) { 
@links.Name
 } 
 } 
 } } catch(Exception e) { Response.Write( e.ToString() ); } } 

好。 它的工作就像一个魅力。

我做了一个函数，它使用JQuery获取链接信息：

  $(".file").click(function () { $.ajax({ url: '@Url.Action("GetLinkInfo")', data: { cat_name: $(this).attr("categ_name"), url: $(this).attr("id") }, type: "GET", success: function (data) { //alert(data.Name + " " + data.Url + " " + data.Description); var make = "
Name:
" + data.Name + "
Url:
" + data.Url + "
Description
" + data.Description + "
"; $("#details").html(make); } }); }); 

和GetLinkInfo

 [HttpGet] public ActionResult GetLinkInfo( string cat_name, string url ) { if ( string.IsNullOrEmpty( cat_name ) ) throw new ArgumentNullException( "GetLinkInfo cat_name" ); if ( string.IsNullOrEmpty( url ) ) throw new ArgumentNullException( "GetLinkInfo url" ); var c = this.Categories.Find( x => x.Name == cat_name ); string name1="", url1="", descr1=""; bool done = false; if ( c != null ) { foreach ( var p in c.Links ) { if ( p.Url == url ) { name1 = p.Name; url1 = p.Url; descr1 = p.Description; done = true; break; } } } if ( done ) { return Json( new { Name = name1, Url = url1, Description = descr1 }, JsonRequestBehavior.AllowGet ); } else { return View(); } } 

我解决了这个问题

 [HttpGet] //controller public JsonResult GetCategoryInfo( string cat_name ) { if ( string.IsNullOrEmpty( cat_name ) ) throw new ArgumentNullException( "GetCategoryInfo cat_name" ); var c = this.Categories.Find( x => x.Name == cat_name ); if ( c != null ) { List lk = null; if ( c.hasChild ) { lk = new List(); foreach ( var p in c.Links ) { lk.Add( p ); } } else { lk = new List( 0 ); } return this.Json(lk,JsonRequestBehavior.AllowGet); } else { return this.Json(new List( 0 ),JsonRequestBehavior.AllowGet); } } 

和JQuery

 $(".folder").click(function() { var find_id = $(this).attr("id"); $.ajax({ type: "GET", url: '@Url.Action("GetCategoryInfo")', dataType : 'json', data: { cat_name: find_id }, success: function (response) { // $("#details").html(response.toString()); var make = ""; make += ""; $.each(response, function (index, lk) { make += ""; }); make += "
Name
Url
Description
" + lk.Name + "
" + lk.Url + "
" + lk.Description + "
"; $("#details").html(make); } }); }); 

Answer 1

尝试将public ActionResult GetCategoryInfo()更改为public JsonResult GetCategoryInfo()

我想ActionResult返回类型可能会导致问题，但这只是一种预感！