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我一生都无法弄清楚为什么这个 ajax 调用不断返回错误。(我是网络世界的新手,所以我猜我在这里遗漏了一些简单的东西:S)

在我的 cshtml 中,我有一个包含标签的 Select2 多值选择框。然后,当我尝试通过对控制器进行 ajax 调用来删除标签时,即使我的操作成功完成,它也会返回错误:

  $(function () {
        $('#tagSelector').select2({
            placeholder: 'Select a tag...',
            multiple: true,
            ajax: {
                url: '@Url.Action("SearchTags", "UnitDetails")',
                dataType: 'json',
                data: function (term, page) {
                    return {
                        searchTerm: term
                    };
                },
                results: function (data, page) {
                    return { results: data };
                }
            },
            createSearchChoice: function (term) {
                return {id: term, text: term};
            }
        }).on("removed", function(e) {
            var url = '@Url.Content("~/UnitDetails/UnTagUnit/" + Model.ViewUnitContract.Id)';
            var id = e.val;
            var tagName = e.choice.text;
            console.log(id + " : " + tagName);

            $.ajax({
                url: url,
                data: { selectedItem: tagName },
                type: 'GET',
                dataType: 'json',
                success: function() {
                    toastr.options = {
                        "closeButton": true,
                        "debug": false,
                        "positionClass": "toast-top-right",
                        "onclick": null,
                        "showDuration": "300",
                        "hideDuration": "1000",
                        "timeOut": "3000",
                        "extendedTimeOut": "1000",
                        "showEasing": "swing",
                        "hideEasing": "linear",
                        "showMethod": "fadeIn",
                        "hideMethod": "fadeOut"
                    };
                    toastr.success("Tag deleted from unit.", "Success!");
                },
                error: function() {
                    toastr.options = {
                        "closeButton": true,
                        "debug": false,
                        "positionClass": "toast-top-right",
                        "onclick": null,
                        "showDuration": "300",
                        "hideDuration": "1000",
                        "timeOut": "3000",
                        "extendedTimeOut": "1000",
                        "showEasing": "swing",
                        "hideEasing": "linear",
                        "showMethod": "fadeIn",
                        "hideMethod": "fadeOut"
                    };
                    toastr.error("Could not delete tag from unit.", "Oops!");
                }
            });
        });

在我的控制器中,UnTagUnit(int id, string selectedItem)看起来像这样:

[HttpGet]
public JsonResult UnTagUnit(int id, string selectedItem)
{
    try
    {
        UnitClient.UnTagUnit(id, selectedItem);

        // what to return if success?
    }
    catch (Exception e)
    {
        // Log and handle
        // what to return if error?
    }
}

如前所述,该方法运行良好,我的意思是UnTagUnit(id, selectedItem)成功完成该部分(wcf 服务)。

所以,我想我要么错过了什么,要么做了一些根本错误的事情。还尝试了不同的方法,如返回new Json(new { success = true} )

4

1 回答 1

3

JsonRequestBehavior.AllowGet由于您使用的是GET方法,因此您需要在操作中使用 return ,

[HttpGet]
public JsonResult UnTagUnit(int id, string selectedItem)
{
    try
    {
        UnitClient.UnTagUnit(id, selectedItem);

        // what to return if success?
        return   Json(data, JsonRequestBehavior.AllowGet)
    }
    catch (Exception e)
    {
        // Log and handle
        // what to return if error?
        //you can throw error here .. 
        throw ("Un tag failed "+e.Message);
       ///or return it as a message
         return   Json( new { success = false,message="Un tag failed "+e.Message} , JsonRequestBehavior.AllowGet)
    }
}
于 2013-10-24T06:53:59.817 回答