Asp.net 如何将接口绑定到Razor窗体

我有一个剃刀形式（来自脚手架），绑定到接口：

public class CreateModel : PageModel
{
    private readonly ImageStorm.DB.Core.ImagestormContext _context;

    public CreateModel(ImageStorm.DB.Core.ImagestormContext context)
    {
        _context = context;
    }

    public IActionResult OnGet()
    {
        return Page();
    }

    [BindProperty]
    public IImaging Imaging { get; set; } = new Imaging();

    // To protect from overposting attacks, please enable the specific properties you want to bind to, for
    // more details see https://aka.ms/RazorPagesCRUD.
    public async Task<IActionResult> OnPostAsync()
    {
        if (!ModelState.IsValid)
        {
            return Page();
        }

        _context.Imagings.Add((Imaging)Imaging);
        await _context.SaveChangesAsync();

        return RedirectToPage("./Index");
    }
}

这对SCA折叠索引页非常有用

但是，当我将此方法用于创建页面时，在保存时会出现以下错误：

InvalidOperationException:无法创建“ImageStorm.DB.Core.IImaging”类型的实例。模型绑定的复杂类型不能是抽象类型或值类型，并且必须具有无参数构造函数。或者，在“ImageStorm.Client.CreateModel”构造函数中将“Imaging”属性设置为非空值。

Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ComplexTypeModelBinder.CreateModel(ModelBindingContext bindingContext)
Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ComplexTypeModelBinder.BindModelCoreAsync(ModelBindingContext bindingContext, int propertyData)
Microsoft.AspNetCore.Mvc.ModelBinding.ParameterBinder.BindModelAsync(ActionContext actionContext, IModelBinder modelBinder, IValueProvider valueProvider, ParameterDescriptor parameter, ModelMetadata metadata, object value)
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageBinderFactory+<>c__DisplayClass2_0+<<CreatePropertyBinder>g__Bind|0>d.MoveNext()
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.BindArgumentsCoreAsync()
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.InvokeInnerFilterAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ComplexTypeModelBinder.CreateModel（ModelBindingContext）
Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ComplexTypeModelBinder.bindModelCoreAscync（ModelBindingContext bindingContext，int-propertyData）
Microsoft.AspNetCore.Mvc.ModelBinding.ParameterBinder.BindModelAsync（ActionContext ActionContext、IModelBinder modelBinder、IValueProvider valueProvider、ParameterDescriptor参数、ModelMetadata元数据、对象值）
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageBinderFactory+c\uu DisplayClass2\u 0+d.MoveNext（）
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.BindArgumentsCoreAsync（）
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.InvokeInnerFilterAsync（）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g_|24_0（ResourceInvoker invoker，Task lastTask，State next，Scope Scope，object State，bool isCompleted）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow（ResourceExecutedContextSealed上下文）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next（ref状态Next、ref作用域、ref对象状态、ref bool已完成）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync（）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g|u waiting | 17|0（ResourceInvoker invoker，Task Task，IDisposable作用域）
Microsoft.AspNetCore.Routing.EndpointMiddleware.g_uwaitRequestTask | 6_0（端点端点、任务请求任务、ILogger记录器）
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke（HttpContext上下文）
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke（HttpContext上下文）

是否有变通方法或更好的方法

如何将接口绑定到Razor窗体

你没有。

Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ComplexTypeModelBinder.CreateModel(ModelBindingContext bindingContext)
Microsoft.AspNetCore.Mvc.ModelBinding.Binders.ComplexTypeModelBinder.BindModelCoreAsync(ModelBindingContext bindingContext, int propertyData)
Microsoft.AspNetCore.Mvc.ModelBinding.ParameterBinder.BindModelAsync(ActionContext actionContext, IModelBinder modelBinder, IValueProvider valueProvider, ParameterDescriptor parameter, ModelMetadata metadata, object value)
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageBinderFactory+<>c__DisplayClass2_0+<<CreatePropertyBinder>g__Bind|0>d.MoveNext()
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.BindArgumentsCoreAsync()
Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.PageActionInvoker.InvokeInnerFilterAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

错误信息很清楚

模型绑定复杂类型不能是抽象类型或值类型，并且必须具有无参数构造函数

重点矿山

使用具体的实现

public class CreateModel : PageModel {
    private readonly ImageStorm.DB.Core.ImagestormContext _context;

    public CreateModel(ImageStorm.DB.Core.ImagestormContext context) {
        _context = context;
    }

    public IActionResult OnGet() {
        return Page();
    }

    [BindProperty]
    public Imaging Imaging { get; set; } = new Imaging();//<-- NOTE USE OF IMPLEMENTATION 

    public async Task<IActionResult> OnPostAsync() {
        if (!ModelState.IsValid) {
            return Page();
        }

        _context.Imagings.Add(Imaging);
        await _context.SaveChangesAsync();

        return RedirectToPage("./Index");
    }
}

公共类CreateModel:PageModel{
私有只读ImageStorm.DB.Core.ImagestormContext\u上下文；
公共CreateModel（ImageStorm.DB.Core.ImagestormContext上下文）{
_上下文=上下文；
}
公共IActionResult OnGet（）{
返回页（）；
}
[BindProperty]
公共映像映像{get；set；}=new Imaging（）；//错误消息很清楚
模型绑定的复杂类型不能是抽象类型或值类型，并且必须具有无参数构造函数。
使用具体的实现。如果在EF.Core类上设置各种属性并绑定它们，它就会工作。但是，当我更新模型时，所有这些编辑都会丢失。是否有策略避免他的？