模型绑定不适用于复杂对象

Question

这是我要查看的视图 post:

@model WelcomeViewModel
@using (Html.BeginForm("SignUp", "Member", new { ReturnUrl = ViewBag.ReturnUrl }, FormMethod.Post))
{

    ....
    <div class="form-group">
        @Html.EditorFor(model => model.SignUp.CompanyName, new {htmlAttributes = new {@class = "form-control" }})
    </div>
    <div class="form-group">
        @Html.EditorFor(model => model.SignUp.RegisteredNo, new {htmlAttributes = new {@class = "form-control" } })
    </div>
    ....
    <button type="submit" name="signup" class="btn">Register</button>
}

视图模型：

public class WelcomeViewModel
{
    public SignInViewModel LogOn { get; set; }
    public SignUpViewModel SignUp { get; set; } 
}

操作方法：

[HttpPost, AllowAnonymous, ValidateAntiForgeryToken]
public virtual async Task<ActionResult> SignUp(SignUpViewModel model)
{
    if (!ModelState.IsValid)
        return View("SignIn", new WelcomeViewModel { SignUp = model });

    // other code
    return View();
}

当我 post 数据时，模型变为空。我知道输入将生成如下：

<input id="SignUp_CompanyName" name="SignUp.CompanyName">

但是模型活页夹接受这个：

<input id="SignUp_CompanyName" name="CompanyName">

现在我想知道如何删除该前缀？我知道我可以为每个输入显式添加名称：

@Html.TextBoxFor(model => model.SignUp.CompanyName, new { Name = "CompanyName" })

但我想用强类型的方式来做。

Answer 1

也许最简单的方法是应用 [Bind] 属性并将其 Prefix 设置为 "SignUp":

public async Task<ActionResult> SignUp([Bind(Prefix="SignUp")] SignUpViewModel model)

见MSDN

模型绑定不适用于复杂对象

Model binding doesn't work for complex object

asp.net-mvc

model-binding