如果我的视图中有此内容:
If I have this in my View:
@using (Html.BeginForm("Sum","Student")) { <p> Number1: @Html.TextBox("num1") </p> <P> Number2: @Html.TextBox("num2") </P> <input type="submit" value="Calculate"/> }这在我的控制器中:
public void Sum(FormCollection values) { var num11 = Convert.ToInt32(values["num1"]); var num21 = Convert.ToInt32(values["num2"]); int result = num11 + num21; //How return result back to view and show it in a textbox }如何将结果返回到视图并显示在文本框中?
How can I return the result back to the view and show it in a textbox?
编辑:我按照建议尝试了以下代码,但随后将我重定向到另一个视图,但没有任何结果.我想在将数据发送到sum方法的同一视图中显示结果:
Edit: I tried the following code as suggested but it then redirect me to another view without any result. I want to show the result in the same view that I send the data to the sum method:
public void Sum(FormCollection values) { .... ViewBag.result = result; }并且:
.... <input type="submit" value="Calculate"/> string str = (string)ViewBag.Res; @Html.TextBox("Result",str) 推荐答案我建议您使用表单模型而不是仅使用命名字符串.它可以让您以更漂亮的方式做更多的事情.
I would suggest you to use form-model instead of just named strings. It will allow you to do much more in much more beautiful way.
Views/Test/Index.cshtml
Views/Test/Index.cshtml
@model MyForm @using (Html.BeginForm("Index", "Test")) { <div>@Html.TextBoxFor(m => m.Num1)</div> <div>@Html.TextBoxFor(m => m.Num2)</div> <div>@Html.TextBoxFor(m => m.Result)</div> <input type="submit" value="Calculate" /> }Myform.cs
Myform.cs
public class MyForm { public int Num1 { get; set; } public int Num2 { get; set; } public long Result => Num1 + Num2; }TestController.cs
TestController.cs
public class TestController : Controller { [HttpGet] public ActionResult() { return View(new MyForm()); } [HttpPost] public ActionResult Index(MyForm form) { return View(form); } }已更新
好像我们在这里谈论AJAX请求一样.尽管我认为在MVC上使用AjaxHelper是一种不好的做法(在具有层次结构的大型项目中),但在这种情况下,它可能会很好地工作.
Looks like we're talking about AJAX requesting here. Although i consider using AjaxHelper at MVC a bad practice (in a large projects with hierarchycal structure), in this case it might work just fine.
@using (Ajax.BeginForm("Calculate", "Test", new AjaxOptions { HttpMethod = "GET", InsertionMode = InsertionMode.Replace, UpdateTargetId = "Result" })) { <div>@Html.TextBox("num1")</div> <div>@Html.TextBox("num2")</div> <div id="Result"></div> <input type="submit" value="Calculate" /> }和方法
public ActionResult Calculate(FormCollection values) { var num1 = Convert.ToInt32(values["num1"]); var num2 = Convert.ToInt32(values["num2"]); return Content(num1 + num2); }别忘了引用js
<script src="@Url.Content("~/Scripts/jquery.unobtrusive-ajax.js")" type="text/javascript"></script>更多推荐
如何将结果发送回同一视图?
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