Question

本文https://docs.microsoft.com/en-us/aspnet/core/mvc/models/model-binding?view=aspnetcore-3.0之后：

[Bind] attribute
Can be applied to a class or a method parameter. Specifies which properties of a model should be included in model binding.

In the following example, only the specified properties of the Instructor model are bound when any handler or action method is called:

C#

Copy
[Bind("LastName,FirstMidName,HireDate")]
public class Instructor
In the following example, only the specified properties of the Instructor model are bound when the OnPost method is called:

C#

Copy
[HttpPost]
public IActionResult OnPost([Bind("LastName,FirstMidName,HireDate")] Instructor instructor)
The [Bind] attribute can be used to protect against overposting in create scenarios. It doesn't work well in edit scenarios because excluded properties are set to null or a default value instead of being left unchanged.

我的模型定义为

public class Family
{
    public int ID { get; set; }
    public string Name { get; set; }

    public string Address { get; set; }
}

当我在Web Api控制器中使用此功能时，我期望输入模型仅具有name属性，而忽略address属性（空或空）。 PostMan Json身体：

 {
"Name": "Faimly1",
"Address":"Address1"
 }

    [HttpPost]
    public async Task<ActionResult<Family>> PostFamily([FromBody][Bind("Name")] Family family)
    {
        Console.WriteLine(family.Name); // Expect the string "Family1".
        Console.WriteLine(family.Address); // Should be empty even I have passed a string value.
    }

当我使用邮递员测试操作时，我仍然会获得“地址”值。我该怎么办？我在asp.net core 3.0和asp.net core 2.1中都进行了测试，并获得了相同的结果。

还是此绑定仅与标签助手一起使用？

Answer 1

您可以尝试在模型类中使用JsonIgnoreAttribute代替BindAttribute：

public class Family
{
    public int ID { get; set; }
    public string Name { get; set; }

    [JsonIgnore]
    public string Address { get; set; }
}

模型绑定在Asp.net Core 3.0中不起作用

1 个答案: