当我发回到控制器时，模型的所有值都为空

Question

我将模型切回了一个领域：

//模型

public class LetterViewModel

{

    public string LetterText;

}

//控制器

public ActionResult Index()

{

    var model = new LetterViewModel();

    model.LetterText = "Anything";

    return View(model);

}

[HttpPost]

public ActionResult Index(LetterViewModel model)

{ 

    //model.LetterText == null

    return View(model);

}

//视图

@model Test.Models.LetterViewModel

@{

    Layout = "~/Views/Shared/_Layout.cshtml";

    ViewBag.Title = "Create a Letter";

}

@using (Html.BeginForm())

{

    <div id="Bottom">

        @Html.TextAreaFor(m => m.LetterText)

        <input type="submit" value="Ok" class="btn btn-default" />

    </div>

}

当我在开发工具中检查“网络”选项卡时，它显示输入的值已包含在请求中。但是，当HttpPost控制器被激发时，该字段为空。

Answer 1

您需要在参数之前添加[FromBody]到操作[HttpPost]public ActionResult Index([FromBody]LetterViewModel model){&nbsp;&nbsp; &nbsp; //model.LetterText == null&nbsp; &nbsp; return View(model);}