Html.Partial传递model和ViewDataDict

Html.Partial也可以传递多个数据
形如：@Html.Partial("Test", Model, new ViewDataDictionary { { "key", "object value" } });
1、contorller方法

public async Task<ActionResult> Create(string majorId="")
        {
            //取选择的专业
            var major = await _majorService.GetByIdAsync(majorId);
            ViewBag.Major = major;
            var nowYear = DateTime.Now.Year;
            List<SelectListItem> gradeList = new List<SelectListItem>();
            for (int i = -3; i <= 3; i++)
            {
                string grade = (nowYear + i).ToString();
                gradeList.Add(new SelectListItem(){Text=grade,Value=grade,Selected = (i==0)});
            }
            gradeList.Insert(0, new SelectListItem() { Text = "--请选择--",Value="",Selected = false});
            ViewBag.GradeList = gradeList;
            var model = new ClassInfoModel(){ MajorId = majorId };
            return View(model);
        }

2、视图

@model xxxxxx.ClassInfoModel

@{
    ViewBag.Title = "新增";
    Layout = "~/Views/Shared/_Layout.cshtml";
    var major = ViewBag.Major as MajorModel ?? new MajorModel();
    var gradeList = ViewBag.GradeList as List<SelectListItem> ?? new List<SelectListItem>();
}

@using (Html.BeginForm("Create", "ClassInfo", FormMethod.Post, new { @class = "cssClass" }))
{
    @Html.Partial("_CreateOrUpdate", Model, new ViewDataDictionary() { { "majorName", major.Name },{"gradeList",gradeList} })
}

3、在_CreateOrUpdate分部视图中使用数据

@model xxxxxx.ClassInfoModel

专业：@ViewData["majorName"].ToString()
年级：@Html.DropDownList("Grade", ViewData["gradeList"] as IEnumerable<SelectListItem>, new
                {
                    @class = "form-control",
                    data_required = "true"
                })

4、Html.RenderAction传递多个方法参数值

<div class="ccccc" id="publicView">
                                @{
                                    Html.RenderAction("actionName", "controllerName", new { CourseId = course.Id, TermId = term.Id });
                                }
                            </div>