asp.net mvc Model Binder

1.Modelにバインドされている値を次の順序で検索します。

Request.Form

RouteData.Values

Request.QueryString

Request.Files

2 Model Binding方式を呼び出す

2.1オートコール

public ActionResult DisplayAddress(Address address) {
    return View(address);
}

2.2手動呼び出し

public ActionResult DisplayAddress() {
   IList
 addresses = new List
();
   UpdateModel(addresses);//  UpdateModel    ，         
   TryUpdateModel(addresses);//  TryUpdateModel    ，          
    return View(address);
}

3、作用範囲（Includeで例を挙げる）

3.1方法上

public ActionResult DisplayAddress([Bind(Include = "Country")]Address address) {
    return View(address);
}

3.2アプリケーション

    //Model Address
    [Bind(Include = "Country")]
    public class Address {
          public string City { get; set; }
          public string Country { get; set; }
    }

4、バインドには属性が含まれていません

//
public ActionResult DisplayAddress([Bind(Exclude = "Country")]Address address) {
    return View(address);
}

5、固定属性のバインド

public ActionResult DisplayAddress([Bind(Include = "Country")]Address address) {
    return View(address);
}

7、接頭辞の追加

//
public ActionResult DisplayAddress([Bind(Prefix="HomeAddress")]Address address) {
    return View(address);
}

8、カスタムModel Binder

8.1定義

//  IModelBinder
public class AddressBinder : IModelBinder {
    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) {
        Address model = (Address)bindingContext.Model ?? new Address();
        model.City = GetValue(bindingContext, "City");
        model.Country = GetValue(bindingContext, "Country");
        return model;
    }

    private string GetValue(ModelBindingContext context, string name) {
        name = (context.ModelName == "" ? "" : context.ModelName + ".") + name;
        ValueProviderResult result = context.ValueProvider.GetValue(name);
        if (result == null || result.AttemptedValue == "") 
            return "";
        else 
            return (string)result.AttemptedValue;
    }
}

8.2登録

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();
    ModelBinders.Binders.Add(typeof(Address), new AddressBinder());
}