asp-for輸入不綁定到ViewModel

我有一個使用asp-for屬性的簡單表單。asp-for輸入不綁定到ViewModel

@using System.Threading.Tasks 
@using MyApp.Controllers 
@using MyApp.Models.Login 
@model MyApp.Models.Login.LoginModel 

<form asp-controller="Login" asp-action="Login" asp-route-returnUrl="@ViewBag.ReturnUrl" method="post" class="form-horizontal" role="form"> 
    <div class="form-group"> 
    <label class="col-md-2 control-label">UserName</label> 
    <div class="col-md-6"> 
     <input asp-for="Username" class="form-control"/> 
     <span asp-validation-for="Username" class="text-danger"></span> 
    </div> 
    </div> 
    <div class="form-group"> 
    <label class="col-md-2 control-label">Password</label> 
    <div class="col-md-6"> 
     <input asp-for="Password" type="password" class="form-control"/> 
     <span asp-validation-for="Password" class="text-danger"></span> 
    </div> 
    </div> 
    <div class="form-group"> 
    <div class="col-md-offset-2 col-md-1"> 
     <button type="submit" class="btn btn-primary">Log in</button> 
    </div> 
    <div class="col-md-offset-2 col-md-3"> 
     <a href="/ForgotPassword" class="pull-right">Forgot password?</a> 
    </div> 
    </div> 
</form>

我的控制器有一個操作，它接受LoginModel，但當我單擊提交時，屬性爲空。

[AllowAnonymous] 
[HttpPost("/Login")] 
public async Task<IActionResult> Login(LoginModel lm, string returnUrl) 
{ 
    //lm.Username and lm.Password are null 
    //... 
}

這裏是LoginModel：

public class LoginModel 
{ 
    [Required(ErrorMessage = "Username is required", AllowEmptyStrings = false)] 
    public string Username { get; set; } 

    [Required(ErrorMessage = "Password is required", AllowEmptyStrings = false)] 
    public string Password { get; set; } 
}

我使用ASP.NET 1.0的核心RTM。這是我的project.json：

"buildOptions": { 
    "emitEntryPoint": true, 
    "preserveCompilationContext": true 
}, 
"dependencies": { 
"EspritWeb.Services": "1.0.0-*", 
"Microsoft.AspNetCore.Authentication.Cookies": "1.0.0", 
"Microsoft.AspNetCore.Authorization": "1.0.0", 
"Microsoft.AspNetCore.Diagnostics": "1.0.0", 
"Microsoft.AspNetCore.Hosting": "1.0.0", 
"Microsoft.AspNetCore.Hosting.Abstractions": "1.0.0", 
"Microsoft.AspNetCore.Http.Extensions": "1.0.0", 
"Microsoft.AspNetCore.Localization": "1.0.0", 
"Microsoft.AspNetCore.Mvc": "1.0.0", 
"Microsoft.AspNetCore.Routing": "1.0.0", 
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0", 
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0", 
"Microsoft.AspNetCore.Session": "1.0.0", 
"Microsoft.AspNetCore.StaticFiles": "1.0.0", 
"Microsoft.Extensions.Caching.SqlServer": "1.0.0", 
"Microsoft.Extensions.Logging.Console": "1.0.0", 
"Microsoft.Extensions.Logging.Debug": "1.0.0", 
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0" 
}, 

"frameworks": { 
    "netcoreapp1.0": { 
     "dependencies": { 
      "Microsoft.NETCore.App": { 
      "type": "platform", 
      "version": "1.0.0" 
      } 
     } 
    } 
}, 

"runtimes": { 
    "win10-x64": {} 
}

任何想法，爲什麼我得到這種行爲？謝謝！

來源

2016-09-13 johnluke.laue

你已經註冊了_ViewImports.cshtml的taghelpers？ @addTagHelper *，Microsoft.AspNetCore.Mvc.TagHelpers –

@JoeAudette做到了！謝謝！！！ –

太棒了，我已將我的評論發佈爲答案，以便您可以接受答案 –

確保您在瀏覽/共享文件夾有_ViewImports.cshtml並在該文件確保您註冊taghelpers

@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

來源

2016-09-13 20:50:20

asp-for輸入不綁定到ViewModel

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