c# - 单击按钮时如何调用 Controller ？

Question

我想在 View 中单击按钮时调用 Controller 。我如何在 MVC 中执行此操作？

这是我的第一个 Controller 。

public ActionResult DetailForm()
{
    graduandModel model = new graduandModel();

    var ceremonyList = _ceremonyService.GetAllCeremonyByDate(DateTime.Now);

    if (ceremonyList.Count == 0)
    {
        return Content("No ceremony can be loaded");
    }
    else
    {
        foreach (var c in ceremonyList)
        {
            model.AvailableCeremony.Add(new SelectListItem() { 
                Text = "Ceremony at " + c.ceremony_date.ToString(), 
                Value = c.ceremony_id.ToString() });
        }
        return View(model);
    }               
}

这是我的看法。

@{
    Layout = "~/Views/Shared/_ColumnsThree.cshtml";
}

@model graduandModel
@using Nop.Web.Models.Hire;
@using Nop.Web.Framework;
@using Telerik.Web.Mvc.UI;
@using System.Linq;

<table>
    <tr>
        <td>
            @Html.LabelFor(model => model.ceremony_id)
        </td>
        <td>
            @Html.DropDownListFor(model => model.ceremony_id, Model.AvailableCeremony)
        </td>
    </tr>
    <tr>
        <td>
            @Html.LabelFor(model => model.first_name):
        </td>
        <td>
            @Html.EditorFor(model => model.first_name)       
        </td>
    </tr>  
    <tr>
        <td>
            @Html.LabelFor(model => model.middle_name):
        </td>
        <td>
            @Html.EditorFor(model => model.middle_name)
        </td> 
    </tr>
    <tr>
        <td>
            @Html.LabelFor(model => model.last_name):
        </td>
        <td >
            @Html.EditorFor(model => model.last_name)
        </td>
    </tr>
    <tr>
        <td>
            @Html.LabelFor(model => model.student_id):
        </td>
        <td>
            @Html.EditorFor(model => model.student_id)  
        </td>
    </tr>    
    <tr>
        <td colspan="2" class="buttons">
            <input type="submit" id="btnsearchgraduand" name="btnsearch" 
                class="searchbutton" value="@T("Search")" />
        </td>
    </tr>
</table>

然后，当我单击搜索按钮时，我想检查输入数据。我应该像这样写新的 Controller 吗

public ActionResult CheckDegreeDetails()
{
    graduandModel model = new graduandModel();

    var degreeList = _graduandService.GetGraduandByStudent(
        model.ceremony_id, model.first_name, 
        model.middle_name, model.last_name);
    return View(model);
}

或者...

我不知道如何在点击按钮时调用 Controller ...

Answer 1

您想将用户输入字段和提交按钮包装在一个表单中。您可以使用 html 帮助程序，它还可以让您指定要调用的 Controller 操作。所以修改你的观点:

...
@model graduandModel
@using Nop.Web.Models.Hire;
@using Nop.Web.Framework;
@using Telerik.Web.Mvc.UI;
@using System.Linq;

@using(Html.BeginForm("DetailForm", "ControllerName", FormMethod.Post, new {enctype="multipart/form-data"})
{
<table  >

 <tr>
    <td >
        @Html.LabelFor(model => model.ceremony_id)
    </td>
...

//code omitted for brevity

...

<input type="submit" id="btnsearchgraduand" name="btnsearch" class="searchbutton" value="@T("Search")" />

})

然后在您的 Controller 中，您需要添加方法来“捕获”此表单。您已经在使用强类型 View ，因此捕获数据很容易

[HttpPost]
public ActionResult DetailForm (graduandModel model)
{
//do what you need to do with the data here
//the model passed into this method's parameter should 
//contain all the data from the editor templates in the view
}