asp.net-mvc-3 - 仅适用于 MVC 应用程序的一个领域的自定义模型绑定(bind)器

Question

我使用了在 Global.asax 文件中配置的自定义模型绑定(bind)器。是否可以仅在应用程序的某些区域下使用此模型绑定(bind)器？

public class CreatorModelBinder : IModelBinder
{

    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        //what logic can i put here so that this only happens when the controller is in certain area- and when it's not in that area- then the default model binding would work
        var service = new MyService();
        if (System.Web.HttpContext.Current != null && service.IsLoggedIn)
            return service.Creator;
        return new Creator {};
    }
}

Answer 1

如果你想调用默认模型绑定(bind)器，你应该从 DefaultModelBinder 派生。而不是直接实现 IModelBinder界面。

接着:

public class CreatorModelBinder : DefaultModelBinder
{
    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        var area = controllerContext.RouteData.Values["area"] as string;
        if (string.Equals(area, "Admin"))
        {
            // we are in the Admin area => do custom stuff
            return someCustomObject;
        }

        // we are not in the Admin area => invoke the default model binder
        return base.BindModel(controllerContext, bindingContext);
    }
}