MVC4 JsTree将所选节点传递给控制器

时间:2013-09-25 23:48:31

标签: c# javascript asp.net-mvc-4 jstree

我在视图中有以下javascript来构建TreeView并从服务器获取数据:

  $(function () {

    $("#EquipmentTree").jstree({

        "json_data": {
            "ajax": {
                "url": "/Helper/GetEquipTreeViewData",
                "type": "POST",
                "data": function () {$("#EquipmentTree").jstree('get_selected').attr('id');},
                "dataType": "json",
                "contentType": "application/json charset=utf-8"
            }
        },

        "themes": {
            "theme": "default",
            "dots": true,
            "icons": true,
            "url": "Scripts/jstree-v.pre1.0/themes/default/style.css"
        },

        "plugins": ["themes", "json_data"],

        "core": { "animation": 100 }
    });
});

我的控制器有:

public ActionResult GetEquipTreeViewData(string nodeId)

    {
        do some stuff

        return Json (data);

    }

Everthing工作正常,但我从未获得所选节点。我总是在nodeId得到NULL。即使我改为:

"data": { nodeId : "TEST" }

我仍然得到null或一些Javascript错误。这让我感到疯狂。我也试过了:

"data" : JSON.stringfy(nodeId);

继续发送null。

它应该是一个普通的AJAX调用,但它不是。我只需要将选定的treenode传递给控制器​​,根据用户选择重新加载结果页面。

感谢您的帮助。

[编辑] 我对测试变体的结果:

TEST1:

var selected_node = $("#EquipmentTree").jstree('get_selected').attr('id');
    $("#EquipmentTree").jstree({

        "json_data": {
            "ajax": {
                "url": "/Helper/GetEquipTreeViewData",
                "type": "POST",
                "data": { nodeId : selected_node },
                "dataType": "json",
                "contentType": "application/json; charset=utf-8"
            }
        },

        "themes": {
            "theme": "default",
            "dots": true,
            "icons": true,
            "url": "Scripts/jstree-v.pre1.0/themes/default/style.css"
        },

        "plugins": ["themes", "json_data"],

        "core": { "animation": 100 }
    });
});

浏览器出错: 无效的Jason Primitive:nodeId

[TEST2]

代码:

 $(function () {

        var selected_node = $("#EquipmentTree").jstree('get_selected').attr('id');
        $("#EquipmentTree").jstree({

            "json_data": {
                "ajax": {
                    "url": "/Helper/GetEquipTreeViewData",
                    "type": "POST",
//                    "data": { nodeId : selected_node },
                    "data": JSON.stringify ("nodeId : " + selected_node),
                    "dataType": "json",
                    "contentType": "application/json; charset=utf-8"
                }
            },

            "themes": {
                "theme": "default",
                "dots": true,
                "icons": true,
                "url": "Scripts/jstree-v.pre1.0/themes/default/style.css"
            },

            "plugins": ["themes", "json_data"],

            "core": { "animation": 100 }
        });
    });

在控制器上调用该函数,但收到null。浏览器数据:

Request URL:http://localhost:7767/Helper/GetEquipTreeViewData
Request Method:POST
Status Code:200 OK
Request Headersview parsed
POST /Helper/GetEquipTreeViewData HTTP/1.1
Host: localhost:7767
Connection: keep-alive
Content-Length: 24
Accept: application/json, text/javascript, */*; q=0.01
Origin: http://localhost:7767
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36
Content-Type: application/json; charset=UTF-8
Referer: http://localhost:7767/MasterDataAdminEquipment
Accept-Encoding: gzip,deflate,sdch
Accept-Language: pt-BR,pt;q=0.8,en-US;q=0.6,en;q=0.4
Cookie: ASP.NET_SessionId=yuf1omlottf0xb4aklvfr4wg

Request Payload view source
nodeId : EquipmentTree
No Properties

修复具有“无属性”的请求有效负载。通常情况下,我们会有一个表格数据,其中包含“参数”和“价值”对的字典....这是我尝试的第n个组合。很奇怪......

3 个答案:

答案 0 :(得分:1)

请改为尝试:

public JsonResult GetEquipTreeViewData(string nodeId)

    {
        do some stuff

        return Json (data, JsonRequestBehavior.DenyGet);

    }

答案 1 :(得分:1)

在我的代码中我使用:

"contentType": "application/json; charset=utf-8"

(注意';')

除此之外,当ajax调用返回时,您应该返回JSON格式的响应:您是否尝试使用Chrome Developer工具进行检查?你收到回复吗?

最后但同样重要的是,如果您得到正确的回复,默认情况下不会选择任何节点,因此查询get_selected将返回undefined

答案 2 :(得分:0)

行。这就是我解决它的方式(实际上我改为将数据传递给视图):

    $(function () {

        var selected_node = $("#EquipmentTree").jstree('get_selected').attr('id');
        var link = '@Url.Action("GetEquipTreeViewData", "Helper", new { nodeId = "-1" })';
        link = link.replace("-1", selected_node);

        $("#EquipmentTree").jstree({

            "json_data": {
                "ajax": {
                    "url": link,
                    "type": "POST",
                    "dataType": "json",
                    "contentType": "application/json; charset=utf-8"
                }
            },

            "themes": {
                "theme": "default",
                "dots": true,
                "icons": true,
                "url": "Scripts/jstree-v.pre1.0/themes/default/style.css"
            },

            "plugins": ["themes", "json_data"],

            "core": { "animation": 100 }
        });
    });

基本上我退出了javascript并去找帮助者(他们来这里是为了帮助)...... Javascript很好,功能强大,但仍缺乏一个好的IDE环境/调试工具,以避免与逗号,半音和其他小事相关的这些类型的故障。请记住我原来的纯C ++时代(我的意思是纯cc编译器,根本没有IDE)。

希望这有助于某人!

的Rds!