Question

我对MVC和C＃很新，我发现自己陷入了这个问题。

我有3个表： UserCredentials ， BusinessCredentials 和 BusinessDetails 。我创建了3个ViewModel：

UserBusinessListingViewModel

[Display(Name = "User Id:")]
public int User_Id { get; set; }

public IEnumerable<BusinessCredentialsViewModel> BusinessCredentialsViewModels {get; set;}

BusinessCredentialsViewModel

[Display(Name = "Business Id:")]
public int Id { get; set; }

[Display(Name = "Name:")]
public string Name { get; set; }

public IEnumerable<BusinessDetailsViewModel> BusinessDetailsViewModels { get; set; }

BusinessDetailsViewModel 即可。

[Display(Name = "Id:")]
public int Id { get; set; }

[Display(Name = "Category:")]
public string Category { get; set; }

[Display(Name = "Rating:")]
public float Rating { get; set; }

[Display(Name = "Country:")]
public string Country { get; set; }

[Display(Name = "State:")]
public string State { get; set; }

[Display(Name = "City:")]
public string City { get; set; }

主视图模型是 UserBusinessListingViewModel ;它必须显示上面所有3个表中的信息。

在控制器中我有

UserCredential businessSectionUserCredential = 
    _unitOfWork.UserCredentials
            .Include("BusinessCredentials")
            .Include("BusinessCredentials.BusinessDetails")
            .First(p => p.Id == WebSecurity.CurrentUserId);

var userBusinessListingViewModel = new UserBusinessListingViewModel();
userBusinessListingViewModel.User_Id = businessSectionUserCredential.Id;

我被困在这里。

userBusinessListingViewModel.BusinessCredentialsViewModels

没有属性。我该如何映射？

谢谢。

我想实现这样的目标。之前已完成此操作，但这很简单，因为我只有一个视图模型：

var profileViewModel = new ProfileViewModel();

UserCredential userCredential = _unitOfWork.UserCredentials.Include(p => p.UserDetail).First(p => p.Id == WebSecurity.CurrentUserId);
UserDetail userDetail = userCredential.UserDetail;

profileViewModel.UserCredentials_Id = userCredential.Id;
profileViewModel.Email = userCredential.Email;
profileViewModel.FirstName = userDetail.FirstName;
profileViewModel.LastName = userDetail.LastName;
return PartialView("_ProfilePartial", profileViewModel);

我正在使用

@model BusinessListing.ViewModels.UserBusinessListingViewModel
<div class="col-md-8">
    <p class="p-custom-bg">@Model.User_Id</p>
</div>

显示此内容。

Answer 1

Add您没有BusinessCredentialsViewModels或类似的任何方法，因为它是IEnumerable。但是，你已经为它定义了一个getter和setter，所以你可以这样做：

userBusinessListingViewModel.BusinessCredentialsViewModels = array;

在不知道更多代码的情况下，我无法告诉您要编写的确切代码。但是说UserCredential的属性BusinessCredientials是IEnumerable<BusinessCredential>，您可以这样做：

userBusinessListingViewModel.BusinessCredentialsViewModels
    = userCredential.BusinessCredentials.Select(
        x => new BusinessCredentialsViewModel
            {
                Id = x.Id,
                /* etc, etc */
            });

Answer 2

userBusinessListingViewModel.BusinessCredentialsViewModels是IEnumerable，因此您看不到属性。

创建BusinessCredentialsViewModel的对象，然后为其属性指定值。为对象的所有属性分配值后，将其添加到userBusinessListingViewModel.BusinessCredentialsViewModels。例如：

var businessCredentialsViewModel = new BusinessCredentialsViewModel();    
businessCredentialsViewModel.Name = "SomeName";    userBusinessListingViewModel.BusinessCredentialsViewModels.Add(businessCredentialsViewModel);

ViewModel中的ViewModel

2 个答案: