ASP.NET MVC：多模型绑定

发布于 2024-08-18 07:26:57 字数 872 浏览 8 评论 0原文

是否可以使用某种 Multibinders，就像这样？

[Authorize]
[AcceptVerbs("POST")]
public ActionResult Edit([CustomBinder]MyObject obj)
{
   ///Do sth.
}

当我也配置了这样的默认活页夹时：

    protected void Application_Start()
    {
        log4net.Config.XmlConfigurator.Configure();
        RegisterRoutes(RouteTable.Routes);

        ModelBinders.Binders.DefaultBinder = new Microsoft.Web.Mvc.DataAnnotations.DataAnnotationsModelBinder();
    }

我想要的是拥有 DataAnnotationsBinder （它验证字符串长度、正则表达式等数据）以及另外设置字段值的自定义活页夹的好处。

我不能为此只编写 1 个活页夹，因为我使用 EntitiyFramework 并与 DataAnnotations 结合使用，它会产生如下结构：

   [MetadataType(typeof(MyObjectMetaData))]
   public partial class MyObject
   {
   }


   public class MyObjectMetaData
   {
    [Required]
    [StringLength(5)]
    public object Storename { get; set; }
   }

原文

is it possible to use some kind of Multibinders, like this?

[Authorize]
[AcceptVerbs("POST")]
public ActionResult Edit([CustomBinder]MyObject obj)
{
   ///Do sth.
}

When i ALSO have configured a default binder like this:

    protected void Application_Start()
    {
        log4net.Config.XmlConfigurator.Configure();
        RegisterRoutes(RouteTable.Routes);

        ModelBinders.Binders.DefaultBinder = new Microsoft.Web.Mvc.DataAnnotations.DataAnnotationsModelBinder();
    }

What i want is to have the benefits of the DataAnnotationsBinder ( which validates the data for stringlength, regexps, etc ) and additionally my custom binder which sets the field values.

I can't write only 1 binder for this, as iam using the EntitiyFramework and in combination with the DataAnnotations it results in contstruct like this:

   [MetadataType(typeof(MyObjectMetaData))]
   public partial class MyObject
   {
   }


   public class MyObjectMetaData
   {
    [Required]
    [StringLength(5)]
    public object Storename { get; set; }
   }

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傲影 2024-08-25 07:26:57

您可以尝试在自定义模型绑定器中调用默认模型绑定器。

public class CustomBinder : IModelBinder {
    public object BindModel(ControllerContext controllerContext, 
    ModelBindingContext bindingContext) {
         MyObject o = (MyObject)ModelBinders.Binders
             .DefaultBinder.BindModel(controllerContext, bindingContext);
         //Your validation goes here.
         return o;
    }
}

You can try calling the default model binder in your custom model binder.

public class CustomBinder : IModelBinder {
    public object BindModel(ControllerContext controllerContext, 
    ModelBindingContext bindingContext) {
         MyObject o = (MyObject)ModelBinders.Binders
             .DefaultBinder.BindModel(controllerContext, bindingContext);
         //Your validation goes here.
         return o;
    }
}

回复收藏 0 原文

本王不退位尔等都是臣 2024-08-25 07:26:57

为什么不直接继承 DataAnnotationsModelBinder 呢？

public class MyBinder : DataAnnotationsModelBinder
{
    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        MyModel obj = (MyModel)base.BindModel(controllerContext, bindingContext);
        //Do your operations
        return obj;
    }
}

ModelBinders.Binders[typeof(MyModel)] = new MyBinder();

Why don't you just inherit from DataAnnotationsModelBinder?

public class MyBinder : DataAnnotationsModelBinder
{
    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        MyModel obj = (MyModel)base.BindModel(controllerContext, bindingContext);
        //Do your operations
        return obj;
    }
}

ModelBinders.Binders[typeof(MyModel)] = new MyBinder();

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