Question

几个小时以来我一直陷入这个问题。当我单击“提交”按钮时，它没有响应。只是刷新页面。

索引控制器

public ActionResult Index()
{
    return View(db.Students.ToList());
}

[HttpGet,ActionName("Index")]
public ActionResult SearchIndex(string option, string search)
{
    if (option == "Name")
    {
        var a = db.Students.Where(x => x.StudentName == search || search == null);

        return View(a.ToList());
    }
    else if (option == "Gender")
    {
        return View(db.Students.Where(x => x.Gender == search).ToList());
    }
    else
    {
        return View(db.Students.Where(x => x.RegNo == search || search == null).ToList()) 
    }
}

索引视图

@using(Html.BeginForm("Index","Student",FormMethod.Get)){
    <div id="search">
        <b>Search By:</b>@Html.RadioButton("option","Name")<b>Name</b>
        @Html.RadioButton("option","Gender")<b>Gender</b>
        @Html.RadioButton("option","Dept")<b>Dept</b>
        @Html.RadioButton("option","RegNo")<b>RegNo</b>
        <input type="text" name="text" />
        <input type="submit"  name="submit" value="Search" class="btn btn-default"/>
    </div>
}

如何解决该问题？

Answer 1

我认为这段代码可以提供更多结果

public ActionResult SearchIndex(string search)
{
var students = from s in db.Students
                   select s;
    if (!String.IsNullOrEmpty(search))
    {
        students = students.Where(s => s.StudentName.Contains(search)
                               || s.Gender.Contains(search));
    }
return View(students.ToList());

}

我不知道您的要求，但是当您搜索数据到db时，您只需要这些数据中的一个或两个属性即可。

@using(Html.BeginForm("Index","Student",FormMethod.Get)){
    <div id="search">
        <input type="text" name="search" />
        <input type="submit"  name="submit" value="Search" class="btn btn-default"/>
    </div>
}

Answer 2

~~创建POST。 GET用于请求数据。您正尝试发送回数据（搜索参数），而这需要回发。~~

[HttpGet] public ActionResult SearchIndex() { return View(); } [HttpPost,ActionName("Index")] public ActionResult SearchIndex(string option, string search) { if (option == "Name") { var a = db.Students.Where(x => x.StudentName == search || search == null); return View(a.ToList()); } else if (option == "Gender") { return View(db.Students.Where(x => x.Gender == search).ToList()); } else { return View(db.Students.Where(x => x.RegNo == search || search == null).ToList()) } }

在使用中，还需要更新html以使用FormMethod.Post。

@using (Html.BeginForm("Index", "Student", FormMethod.Post, new { encType = "multipart/form-data" }))

编辑再次考虑，我认为您只需要将multipart / form-data添加到html中。

@using (Html.BeginForm("Index", "Student", FormMethod.Get, new { encType = "multipart/form-data" }))

为什么搜索操作在MVC中不起作用？

2 个答案: