问题描述
我正在尝试在MVC中使用自定义模型绑定程序,该绑定程序需要从IoC容器中解析.我遇到的问题是,在添加MVC服务时无法访问我的容器,因为还没有构建我的容器(并且我需要在构建容器之前添加MVC).感觉就像是鸡/蛋问题,我敢肯定我错过了一个简单的解决方案.
I am trying to use a custom model binder in MVC that I want resolved from my IoC container. The issue I am having is that I can't access my container while I am adding the MVC service, because my container isn't built yet (and I need to add MVC before building my container). Feels like a chicken/egg issue, and I am sure I am missing a simple solution.
示例:
services.AddMvc().AddMvcOptions(options =>
{
options.ModelBinders.Add(serviceProvider.Resolve<CustomModelBinder>());
});
我的自定义模型活页夹看起来像这样:
My custom model binder looks like this:
public class CustomModelBinder : IModelBinder
{
private IServiceProvider serviceProvider;
public CustomModelBinder(IServiceProvider serviceProvider)
{
this.serviceProvider = serviceProvider;
}
public Task<ModelBindingResult> BindModelAsync(ModelBindingContext bindingContext)
{
var model = serviceProvider.GetService(bindingContext.ModelType);
bindingContext.Model = model;
var binder = new GenericModelBinder();
return binder.BindModelAsync(bindingContext);
}
}
推荐答案
在此发布文章: https ://github.com/aspnet/Mvc/issues/4167
要直接回答您的问题,请使用:
To answer your question directly, use:
bindingContext.OperationBindingContext.ActionContext.HttpContext.RequestServices
另一方面,您还可以选择使用[FromServices]
为您解决该问题.
On a side note, you also have the option of using [FromServices]
to resolve it for you.
这篇关于如何使用支持ASP.NET Core中的依赖项注入的自定义模型绑定器?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!