I am trying to validate below property using annotation, either it should be true or false
public bool Info { get; set; }
I will get a invalid data validation error if i pass json like below
{
"info": trues
}
But strange if i pass like below, no data validation.
{ "info": 12345 }
I had tried with ValidationAttribute
like below, but value is always true even if val is 12345
public class IsBoolAttribute : ValidationAttribute
{
//public override bool RequiresValidationContext => true;
public override bool IsValid(object value)
{
if (value == null) return false;
if (value.GetType() != typeof(bool)) return false;
return (bool)value;
}
}
If you use Newtonsoft.Json in Startup.cs , it seems to convert the random integer to true
by design . You could write a custom JsonConverter like below:
public class CustomBoolConverter : JsonConverter
{
public override bool CanConvert(Type objectType)
{
return true;
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var value = reader.Value;
if (value.GetType() != typeof(bool))
{
throw new JsonReaderException("The JSON value could not be converted to System.Boolean.");
}
return value;
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
serializer.Serialize(writer, value as string);
}
}
Startup.cs
services.AddControllers()
.AddNewtonsoftJson();
Alternative method , you could use System.Text.Json
which is by default since ASP.NET Core 3.0 , Startup.cs like below:
services.AddControllers();
//.AddNewtonsoftJson();
It will return the below error when you input incorrect value:
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