如何在控制器上使用ActionResult在dropdownlist上使用jQuery change事件填充另一个dropdownlist [英] How to use jQuery change event on dropdownlist to populate another dropdownlist using an ActionResult in the Controller

问题描述

我正在尝试使用下拉列表的change事件在控制器中调用ActionResult以便填充另一个下拉列表.

I am trying to use the change event of a dropdown to call an ActionResult in my controller in order to populate another dropdown.

这是我尝试过的jQuery:

Here is the jQuery that I've tried:

 $(function () {
        $('#CertificationId').change(function () {
            var data = {
                certificationId: $('#CertificationId').val()

            };

            var certificationId = $('#CertificationId').val();
//            $.post('@Url.Action("AjaxGetCourseOptions", "WorkerCertifications")', {certificationId : certificationId}, $(this).parents('form:first').serialize(), function (data) {
//                //$('#form').children().remove().append(data);
//            }, 'html');

//            var url = '@Url.Action("AjaxGetCourseOptions", "WorkerCertifications")';
//            var certificationId = $('#CertificationId').val();
//            $.post(url, { certificationId: certificationId }, function (result) {
//                alert('success');
//            });

//            $.getJSON('/WorkerCertifications/AjaxGetCourseOptions/SysAdmin/Worker/Certifications/14843/', data, function (result) {
//                alert(result.message);
//            });

            $.getJSON('@Url.Action("AjaxGetCourseOptions", "WorkerCertifications")', data, function (result) {
                alert(result.message);
            });

//            $.getJSON(this.href, data, function (result) {
//                alert(result.message);
//            });
            return false;
        });
    });

这是控制器中的代码:

public ActionResult AjaxGetCourseOptions( string certificationId )
    {
        var viewData = new WorkerCertificationViewModel
        {
            //CourseOptions = ScheduledCourse.GetActive().ToSelectList(x => x.Id, x => x.Id),
            CourseOptions = ScheduledCourse.GetAvailableCourses(Convert.ToInt64(certificationId)).ToSelectList(x => x.Id, x => x.Id)

        };

        viewModel.CourseOptions = viewData.CourseOptions;

        return Json( new {message = "Test"},
                     JsonRequestBehavior.AllowGet
            );
    }

我似乎无法获得jQuery来调用Controller中的代码.我该怎么做?

I can't seem to get the jQuery to call the code in the Controller. How can I accomplish this?

我仍然无法解决此问题.这是更改事件触发下拉菜单之前页面的URL， http ://mylocalhost.com/camms/WorkerCertifications/Insert/SysAdmin/Worker/Certifications/14843

I am still having an issue getting this to work. This is the url of the page before the change event fires for the dropdown http://mylocalhost.com/camms/WorkerCertifications/Insert/SysAdmin/Worker/Certifications/14843

在change事件触发后，我有一个硬编码的(现在)URL，我想发布到该URL，但是它被追加到当前URL后面.任何想法如何解决这个问题?这是它尝试发布到的URL:

After the change event fires, I have a hard coded (for now) url that I want to post to but it's getting appended to the current url. Any idea how to fix this? This is the url that it is trying to post to: http://mylocalhost.com/camms/WorkerCertifications/Insert/SysAdmin/Worker/Certifications/camms/WorkerCertifications/AjaxGetCourseOptions/SysAdmin/Worker/Certifications/14843/?certificationId=10916

该网址应如下所示: http ://mylocalhost.com/camms/WorkerCertifications/AjaxGetCourseOptions/SysAdmin/Worker/Certifications/14843/?certificationId = 10916

我必须删除本地主机和端口才能保存此更新.

I had to remove the local host and port in order to save this update.

推荐答案

我是通过以下方式实现的:

I accomplished this by the following:

jQuery:

$(function () {
    $('#CertificationId').change(function (evt) {
        var data = {
            certificationId: $('#CertificationId').val()

        };

        var certificationId = $('#CertificationId').val();
        $.ajax({
            //url: "/camms/WorkerCertifications/GetCourseOptions/SysAdmin/Worker/Certifications/14843",
            url: window.location.href.replace('Insert', 'GetCourseOptions'),
            type: 'POST',
            data: { certificationId: certificationId },
            success: function (courseOptions) {
                // courseOptions is your JSON array
                var $select = $('#CourseId');
                $select.children().remove();
                if (courseOptions.length > 0) {
                    var listItems = [];
                    for (var i = 0; i < courseOptions.length; i++) {
                        listItems.push('<option value="' +
                            courseOptions[i].Value + '">' + courseOptions[i].Text + '</option>');
                    }
                    $select.append(listItems.join(''));
                }

                //                    $.each(courseOptions, function (i, option) {
                //                        $('<option>', {
                //                            value: option.Id
                //                        }).html(option.Id).appendTo($select);
                //                    });
            }
        });

        return false;
    });
});

在控制器中:

[HttpPost]
    public JsonResult GetCourseOptions( string certificationId = "0")
    {
        var list = ScheduledCourse.GetAvailableCourses(Convert.ToInt64(certificationId)).ToSelectList(x => x.ScheduledCourseId, x => x.ScheduledCourseId);

        var result = new JsonResult();

        result.Data = list.ToList();

        return result;
    }

这篇关于如何在控制器上使用ActionResult在dropdownlist上使用jQuery change事件填充另一个dropdownlist的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！