Question

ModelState.IsValid的问题始终为true，并在提交时插入

时出错

她是我的ViewModel（CompaniesViewModel.cs）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;

namespace kambi4.Models
{
    public class CompaniesViewModel
    {
        [Required(ErrorMessage = "A Company Name is required")]
        [Display(Name = "Company Name: ")]
        public string Company { get; set; }

        [Required(ErrorMessage = "A Company Legal ID is required")]
        [Display(Name = "Company Legal ID: ")]
        public string LegalId { get; set; }

        [Required(ErrorMessage = "A Contact Email is required")]
        [DataType(DataType.EmailAddress, ErrorMessage = "Please insert a valid Email")]
        [Display(Name = "Contact Email: ")]
        public string ContactEmail { get; set; }

        [Required(ErrorMessage = "A Contact Name is required")]
        [Display(Name = "Contact Name: ")]
        public string ContactName { get; set; }

        [Required(ErrorMessage = "A Contact Phone is required")]
        [Display(Name = "Contact Phone: ")]
        public string ContactPhone { get; set; }
    }
}

这是控制器（或控制器的功能，我有问题）（CompanyController.cs）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using System.ComponentModel.DataAnnotations;

namespace kambi4.Controllers
{
    public class CompanyController : Controller
    {
        //
        // GET: /Company/
        Models.EADBDataContext dc = new Models.EADBDataContext();

        public ActionResult Index()
        {
            return View();
        }

        [HttpGet]
        public ActionResult RegisterCompany()
        {
            return View();
        }

        [HttpPost]
        public ActionResult RegisterCompany(Models.CompaniesViewModel company)
        {
            if (ModelState.IsValid) //<- Is always true here
            {
                var a = new Models.companies();

                a.company = company.Company;
                a.companycode = (new Guid()).ToString();
                a.email = company.ContactEmail;
                a.contactname = company.ContactName;
                a.contactphone = company.ContactPhone;
                a.legalid = company.LegalId;
                a.RegisterDate = DateTime.Now;
                a.status = 3;

                dc.companies.InsertOnSubmit(a);
                dc.SubmitChanges();
            }
            else
            {
                var errors = ModelState.Values.SelectMany(v => v.Errors);
                ModelState.AddModelError("", "Save Failed. Check the fields for errors");
            }
            return View(company);
        }

        [HttpGet]
        public ActionResult RegisterClient()
        {
            return View();
        }

        [HttpPost]
        public ActionResult RegisterClient(Models.ClientModel Client)
        {
            if (ModelState.IsValid)
            {

            }
            else
            {
                ModelState.AddModelError("", "Save Failed. Check the fields for errors");
            }
            return View();
        }

    }
}

最后但并非最不重要的是我的View（RegisterCompany.cshtml）

@model kambi4.Models.CompaniesViewModel

@{
    ViewBag.Title = "Register as Service Company";
    Layout = "~/Views/Shared/_Layout.cshtml";
}


@using (Html.BeginForm())
{
    @Html.ValidationSummary(true, "Create Company Failed. Check your fields");                                                                         
    <div>
    <fieldset>
    <legend>Register as Service Company</legend>
    <table id="RegisterCompany">
    <tr>
        <td align="right">@Html.LabelFor(u => u.Company)</td>
        <td align="left">@Html.TextBoxFor(u => u.Company, new { @class = "k-input" })</td>
        <td align="left"><span class="error">@Html.ValidationMessageFor(u => u.Company)</span></td>
    </tr>
    <tr>
        <td align="right">@Html.LabelFor(u => u.LegalId)</td>
        <td align="left">@Html.TextBoxFor(u => u.LegalId, new { @class = "k-input" })</td>
        <td align="left"><span class="error">@Html.ValidationMessageFor(u => u.LegalId)</span></td>
    </tr>
    <tr>
        <td align="right">@Html.LabelFor(u => u.ContactName)</td>
        <td align="left">@Html.TextBoxFor(u => u.ContactName, new { @class = "k-input" })</td>
        <td><span class="error">@Html.ValidationMessageFor(u => u.ContactName)</span></td>
    </tr>
    <tr>
        <td align="right">@Html.LabelFor(u => u.ContactPhone)</td>
        <td align="left">@Html.TextBoxFor(u => u.ContactPhone, new { @class = "k-input" })</td>
        <td align="left"><span class="error">@Html.ValidationMessageFor(u => u.ContactPhone)</span></td>
    </tr>
    <tr>
        <td align="right">@Html.LabelFor(u => u.ContactEmail)</td>
        <td align="left">@Html.TextBoxFor(u => u.ContactEmail, new { @class = "k-input" })</td>
        <td align="left"><span class="error">@Html.ValidationMessageFor(u => u.ContactEmail)</span></td>
    </tr>
    <tr>
        <td></td>
        <td colspan="2"><input type="submit" value="Create" /></td>
    </tr>
    </table>
    </fieldset>
    </div>
}

任何帮助将不胜感激，总是进入保存模型，显然是给我一个空引用错误，当我提交一个空白表格。

Answer 1

您遇到的至少一个问题是MVC会自动验证CompanyViewModel（并且您在那里发布的数据构成有效的CompanyViewModel），然后手动将其映射到Company，这是无效的（我无法说明原因，因为你没有提供该类定义）。

您可以手动调用在回发中构建的Company对象上的验证，或者您可以让MVC将发布的值绑定到Company，这将导致它执行自动验证，如你期待。

如果你走这条路，你还需要编写一个方法来将Company对象转换为CompanyViewModel对象。

    [HttpPost]
    public ActionResult RegisterCompany(company.Company company)
    {
        if (ModelState.IsValid)
        {
            company.companycode = (new Guid()).ToString();
            company.RegisterDate = DateTime.Now;
            company.status = 3;

            dc.companies.InsertOnSubmit(company);
            dc.SubmitChanges();
        }
        else
        {
            var errors = ModelState.Values.SelectMany(v => v.Errors);
            ModelState.AddModelError("", "Save Failed. Check the fields for errors");
        }

        var companyViewModel = GetViewModel(company);  //transform left as an exercise to the author
        return View(companyViewModel );
    }

ModelState.IsValid的问题始终为true，并在提交时插入时出错

1 个答案: