如何使用int循环进行搜索 [英] How To search using int loop

问题描述

我尝试从1到30列出int值，但直到现在它不起作用的是我的控制器

I try to listing int value from 1 till 30 but until now its not work here is my controller

var lis = new List<int>();
            lis.AddRange(Enumerable.Range(1, 30));
            ViewBag.listku = Enumerable.Range(1, 30).ToString();
            var lispeserta = from item in db.Klaim
                             select item;
            if(!string.IsNullOrEmpty(listku))
            {
                lispeserta = lispeserta.Where(x => x.NoPeserta == listku);
            }


            return View(lispeserta);

这是我的观点

and here is my view

@using (Html.BeginForm("Index", "Klaim", FormMethod.Get))
 { 
         <title>search</title> 
    @Html.DropDownList("listku","Semua") <input type="submit" value="Filter" />
}

错误消息显示具有密钥'listku'的ViewData项的类型为'System.String '但必须是'IEnumerable< SelectListItem>'类型。

我该怎么办？

the error message says "The ViewData item that has the key 'listku' is of type 'System.String' but must be of type 'IEnumerable<SelectListItem>'."
how should I do?

推荐答案

嗯，你可以尝试比较相同的数据类型！

假设 ViewBag.listku 和 listku 是一回事，它包含的值将是类的名称 - 它将沿着System.Linq.Enumerable +< rangeiterator> d__1的行而不是您期望的数字。

可能你想做这样的事情：

Well, you could try comparing the same datatypes!
Assuming that ViewBag.listku and listku are the same thing, the value it contains will be the name of the class - which is going to be along the lines of "System.Linq.Enumerable+<rangeiterator>d__1" rather than the numbers you expect.
Probably you want to do something like this:

var listku = Enumerable.Range(1, 30);
var lispeserta = from item in db.Klaim
                 select item;
    lispeserta = lispeserta.Where(x => listku.Contains(x.NoPeserta));
    return View(lispeserta);

尔加！再次降价！[/ edit]

[edit]Gah! Markdown again![/edit]

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