Question

我在mvc中搜索排序和分页演示，演示工作正常，我指定默认页面大小为5，我应该使用dropdownlist动态更改页面大小？部分代码： -

控制器操作： -

  public ActionResult Index(string searchBy,string search,int? Page,string sortBy)
    {

        ViewBag.SortNameParameter = string.IsNullOrEmpty(sortBy) ? "Name desc" : "";
        ViewBag.SortGenderParameter = sortBy == "Gender" ? "Gender desc" : "Gender";

        var employees = db.Employees.AsQueryable();

        if(searchBy == "Gender")
        {
           employees =  employees.Where(x => x.EmpGender == search || search == null);
        }
        else
        {
            employees = employees.Where(x => x.EmpName.StartsWith(search) || search == null);
        }

        switch(sortBy)
        {
            case "Name desc":
                    employees = employees.OrderByDescending(x=>x.EmpName);
                    break;

            case "Gender desc":
                    employees = employees.OrderByDescending(x=>x.EmpGender);
                    break;

            //case "Gender ":
            //employees = employees.OrderByDescending(x=>x.EmpGender);
            //break;

            default:
            employees = employees.OrderByDescending(x=>x.EmpName);
            break;

        }

        return View(employees.ToPagedList(Page ?? 1, 5));

    }

我在视图结尾添加了pagedlistpager，如下所示： -

@Html.PagedListPager(Model, Page => Url.Action("Index", new  { Page, searchBy = Request.QueryString["searchBy"], search = Request.QueryString["search"], sortBy = Request["sortBy"] }),
new PagedListRenderOptions() { Display = PagedListDisplayMode.IfNeeded, DisplayPageCountAndCurrentLocation = true, DisplayItemSliceAndTotal = true })

Answer 1

嗨很简单，只需使用jquery在dd change事件中将页面大小作为dd值发送。最后在控制器动作方法中，将该参数传递给ToPagedList（）方法。

例如：

public ActionResult Index(string searchBy,string search,int? Page,string sortBy,int ddpagesize)
    {

        ViewBag.SortNameParameter = string.IsNullOrEmpty(sortBy) ? "Name desc" : "";
        ViewBag.SortGenderParameter = sortBy == "Gender" ? "Gender desc" : "Gender";

        var employees = db.Employees.AsQueryable();

        if(searchBy == "Gender")
        {
           employees =  employees.Where(x => x.EmpGender == search || search == null);
        }
        else
        {
            employees = employees.Where(x => x.EmpName.StartsWith(search) || search == null);
        }

        switch(sortBy)
        {
            case "Name desc":
                    employees = employees.OrderByDescending(x=>x.EmpName);
                    break;

            case "Gender desc":
                    employees = employees.OrderByDescending(x=>x.EmpGender);
                    break;

            //case "Gender ":
            //employees = employees.OrderByDescending(x=>x.EmpGender);
            //break;

            default:
            employees = employees.OrderByDescending(x=>x.EmpName);
            break;

        }

        return View(employees.ToPagedList(Page ?? 1, ddpagesize));

    }

对于dropdownchange事件，本文将有所帮助：http://www.c-sharpcorner.com/blogs/drop-down-list-selected-index-changed-event-in-mvc

由于

KARTHIK

使用mvc中的下拉列表更改页面大小

1 个答案: