在ASP.NET web api中使用属性上的必需属性时出现协议webexception错误 [英] Protocol webexception error comes when using required attribute on property in ASP.NET web api

问题描述

I have created ASP.NET Web API and calling the post method using json from client side and it's working fine :

< br $> b $ b

public class ValueController : ApiController
{
    public void Post([FromBody]model value)
    {

    }
}

public class model
{
    public decimal value { get; set; }
}

string JSONString = "{\"value\":\"999.99\"}";

but when I use the [Required] attribute in the value property, 

public class model
{
    [Required]
    public decimal value { get; set; }
}

开始提供协议错误



我尝试了什么：



试图改变JSON字符串的格式

喜欢：

string JSONString ={\value \：999.99};



但是没有工作...

start giving protocol Error

What I have tried:

Tried to change the format of JSON string
like:
string JSONString = "{\"value\":999.99}";

but did not work it...

推荐答案

Since decimal is a Value type and if we use the Required attribute to a value type, it will cause an error.. it will always have a value (the default of 0) if the incoming request does not provide the value.

Now I am using [DataMember(isRequired=true)] instead of [Required] attribute

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