我目前正在尝试修改默认MVC项目的注册组件，以便为我的项目提供更多功能。我修改了RegisterModel，Register.aspx和AccountController这样做。我可以很好地查看寄存器视图，但是当我提交时，我会在标题中看到错误，并且它在问题源自何处的方式上几乎没有任何帮助。有人可以指导我正确的方向让我解决这个问题吗？
更新： 我已添加了内部异常
更新2： 我修改了代码以更好地形成Mystere Man的建议。我为表单创建了一个ViewModel，以便将模型与逻辑分开。我仍然收到同样的错误。
这是模型，视图和控制器代码：
RegisterModel：
[PropertiesMustMatch("Password", "ConfirmPassword", ErrorMessage = "The password and confirmation password do not match.")]
public class RegisterModel
{
[Required]
[DisplayName("First Name")]
public string FirstName { get; set; }
[Required]
[DisplayName("Last Name")]
public string LastName { get; set; }
[DisplayName("Phone")]
[DataType(DataType.PhoneNumber)]
public string Phone { get; set; }
[DisplayName("Fax")]
[DataType(DataType.PhoneNumber)]
public string Fax { get; set; }
[Required]
[DisplayName("User name")]
public string UserName { get; set; }
[Required]
[DataType(DataType.EmailAddress)]
[DisplayName("Email address")]
public string Email { get; set; }
[Required]
[ValidatePasswordLength]
[DataType(DataType.Password)]
[DisplayName("Password")]
public string Password { get; set; }
[Required]
[DataType(DataType.Password)]
[DisplayName("Confirm password")]
public string ConfirmPassword { get; set; }
}
的AccountController：
public ActionResult Register()
{
ViewData["PasswordLength"] = MembershipService.MinPasswordLength;
return View(new UserFormModel());
}
[HttpPost]
public ActionResult Register(UserFormModel model)
{
ClaritySharetrackEntities db = new ClaritySharetrackEntities();
if (ModelState.IsValid)
{
// Attempt to register the user
MembershipCreateStatus createStatus = MembershipService.CreateUser(model.RegisterModel.UserName, model.RegisterModel.Password, model.RegisterModel.Email);
if (createStatus == MembershipCreateStatus.Success)
{
MembershipUser user = Membership.GetUser(model.RegisterModel.UserName);
int userid = Convert.ToInt32(user.ProviderUserKey);
Profile profile = new Profile()
{
UserID = userid,
FirstName = model.RegisterModel.FirstName,
LastName = model.RegisterModel.LastName,
Phone = model.RegisterModel.Phone,
Fax = model.RegisterModel.Fax
};
db.Profiles.AddObject(profile);
db.SaveChanges();
//FormsService.SignIn(model.UserName, false /* createPersistentCookie */);
return RedirectToAction("Welcome", "Home");
}
else
{
ModelState.AddModelError("", AccountValidation.ErrorCodeToString(createStatus));
}
}
// If we got this far, something failed, redisplay form
ViewData["PasswordLength"] = MembershipService.MinPasswordLength;
return View(model);
}
Register.aspx：
<asp:Content ID="registerContent" ContentPlaceHolderID="MainContent" runat="server">
<h2>Create a New Account</h2>
<p>
Use the form below to create a new account.
</p>
<p>
Passwords are required to be a minimum of <%: ViewData["PasswordLength"] %> characters in length.
</p>
<% using (Html.BeginForm()) { %>
<%: Html.ValidationSummary(true, "Account creation was unsuccessful. Please correct the errors and try again.") %>
<div>
<fieldset>
<legend>Account Information</legend>
<div class="editor-label">
<%: Html.LabelFor(m =>m.RegisterModel.FirstName) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(m =>m.RegisterModel.FirstName)%>
<%: Html.ValidationMessageFor(m =>m.RegisterModel.FirstName)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m =>m.RegisterModel.LastName) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(m =>m.RegisterModel.LastName)%>
<%: Html.ValidationMessageFor(m =>m.RegisterModel.LastName)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m =>m.RegisterModel.Phone) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(m =>m.RegisterModel.Phone)%>
<%: Html.ValidationMessageFor(m =>m.RegisterModel.Phone)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m =>m.RegisterModel.Fax) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(m =>m.RegisterModel.Fax)%>
<%: Html.ValidationMessageFor(m =>m.RegisterModel.Fax)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m =>m.RegisterModel.UserName) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(m =>m.RegisterModel.UserName)%>
<%: Html.ValidationMessageFor(m =>m.RegisterModel.UserName)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m =>m.RegisterModel.Email)%>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(m =>m.RegisterModel.Email)%>
<%: Html.ValidationMessageFor(m =>m.RegisterModel.Email)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m =>m.RegisterModel.Password)%>
</div>
<div class="editor-field">
<%: Html.PasswordFor(m =>m.RegisterModel.Password) %>
<%: Html.ValidationMessageFor(m =>m.RegisterModel.Password)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m =>m.RegisterModel.ConfirmPassword)%>
</div>
<div class="editor-field">
<%: Html.PasswordFor(m =>m.RegisterModel.ConfirmPassword)%>
<%: Html.ValidationMessageFor(m =>m.RegisterModel.ConfirmPassword)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m => m.RoleList) %>
</div>
<div class="editor-field">
<%: Html.DropDownListFor(m => m.RoleList, Model.RoleList) %>
<%: Html.ValidationMessageFor(m => m.RoleList)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m => m.ActiveList) %>
</div>
<div class="editor-field">
<%: Html.DropDownListFor(m => m.RoleList, Model.ActiveList)%>
<%: Html.ValidationMessageFor(m => m.ActiveList)%>
</div>
<div class="editor-label">
<%: Html.LabelFor(m => m.CompanyList) %>
</div>
<div class="editor-field">
<%: Html.DropDownListFor(m => m.RoleList, Model.CompanyList)%>
<%: Html.ValidationMessageFor(m => m.CompanyList)%>
</div>
<p>
<input type="submit" value="Register" />
</p>
</fieldset>
</div>
<% } %>
</asp:Content>
UserFormModel：
public class UserFormModel
{
private ClaritySharetrackEntities entities = new ClaritySharetrackEntities();
public RegisterModel RegisterModel { get; private set; }
public SelectList ActiveList { get; private set; }
public SelectList CompanyList { get; private set; }
public SelectList RoleList { get; private set; }
public UserFormModel()
{
SetActiveList();
SetCompanyList();
SetRoleList();
}
private void SetActiveList()
{
var activeList = new List<SelectListItem>{ new SelectListItem{Text = "Yes", Value = "True"},
new SelectListItem{Text = "No", Value = "False"},
};
ActiveList = new SelectList(activeList, "Value", "Text");
}
private void SetCompanyList()
{
CompanyRepository companyRepository = new CompanyRepository();
var companies = companyRepository.GetAllCompanies().Select(c => new { Text = c.CompanyName, Value = c.CompanyID });
this.CompanyList = new SelectList(companies, "Value", "Text");
}
private void SetRoleList()
{
string[] roles = Roles.GetAllRoles();
List<SelectListItem> roleList = new List<SelectListItem>();
foreach (string str in roles)
{
SelectListItem listItem = new SelectListItem() { Text = str, Value = str };
roleList.Add(listItem);
}
RoleList = new SelectList(roleList, "Value", "Text");
}
}
内部例外：
[MissingMethodException: No parameterless constructor defined for this object.]
System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98
System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241
System.Activator.CreateInstance(Type type, Boolean nonPublic) +69
System.Activator.CreateInstance(Type type) +6
System.Web.Mvc.DefaultModelBinder.CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) +403
System.Web.Mvc.DefaultModelBinder.BindSimpleModel(ControllerContext controllerContext, ModelBindingContext bindingContext, ValueProviderResult valueProviderResult) +544
System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +479
System.Web.Mvc.DefaultModelBinder.GetPropertyValue(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor, IModelBinder propertyBinder) +45
System.Web.Mvc.DefaultModelBinder.BindProperty(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor) +658
System.Web.Mvc.DefaultModelBinder.BindProperties(ControllerContext controllerContext, ModelBindingContext bindingContext) +147
System.Web.Mvc.DefaultModelBinder.BindComplexElementalModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Object model) +98
System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +2504
System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +548
System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +473
System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +181
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +830
System.Web.Mvc.Controller.ExecuteCore() +136
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +111
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +39
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__4() +65
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +44
System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +42
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +141
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +54
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +40
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +52
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +38
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +690
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +194
答案 0 :(得分：2)
我知道你现在有这个工作 - 这很棒。
只想在此处发布注释：在模型中使用SelectList时要小心。您的模型将期望一个SelectList，但您的操作可能返回所选对象的id - 这将抛出
System.MissingMethodException：未定义无参数构造函数 对于这个对象。
您可以按照以下方式处理：
[Bind(Exclude = "List")] public class UserFormModel { public SelectList List { get; set; } public int SelectedItem { get; set; } }
很容易错过并且可能会令人沮丧地追逐参数构造函数错误 - 所以我想在这里注意。
答案 1 :(得分：0)
首先，在模型中进行数据访问是个坏主意。模特应该是愚蠢的，他们不应该填充自己。可以在构造函数中创建空列表等，但不要进行数据访问。
其次，在进行数据访问的地方，你不会处理上下文。你应该在那里有一个using语句来自动调用上下文中的Dispose。
第三，不要使用“PropertiesMustMatch”属性，而是使用ConfirmPassword属性上的Compare属性。
这些东西都不应该导致你看到的错误，虽然我不确定属性。尝试删除它，看看它是否有效。