Disable auto model validation in ASP.NET Core 7 Web API?

Question

I have a ASP.NET Core 7 Web API project with one action method. This action method accepts a model from request body like this:

public class ActionModel
{
    [Required]
    [MaxLength(3)]
    [RegularExpression("[a-zA-Z]+[a-zA-Z]*")]
    public string Name { get; set; }
    public Guid ProfileId { get; set; }
}

Assume that this is my action method:

[HttpPost("extra-data")]
public async Task<ActionResult> MyAction([FromBody] ActionModel requestDto)
{
    if (ModelState.IsValid)
    {
        _logger.LogError("Try to do some thing");
    }

    _logger.LogError($"{ModelState.ErrorCount}");
    return Ok();
}

I expect that the execution goes through the action method body, but the request is validated by some other middleware before reaching the action method. How can I disable this default auto-validation middleware?

Do you want to disable model validation for all actions or specific action? For all actions: Correct way to disable model validation in ASP.Net Core 2 MVC, for specific action: Disable model validation for single .NET Core API action — Yong Shun
– Yong Shun, Commented Sep 15, 2023 at 15:46
If you send invalidated data to your endpoint, the request will not hit the endpoint but just return 400 directly, So you don't wanna this happen? I am not sure if I get your point. — Xinran Shen
– Xinran Shen, Commented Sep 18, 2023 at 2:35

Heemanshu Bhalla · Accepted Answer · 2025-05-22 05:58:29Z

I Used below code for disabling Model validations in my WebAPI Project

At Entity Level -

 [ValidateNever]
 public class Usermodel
 {
     public string Username { get; set; }
     
     public string Password { get; set; }
     
     public string EmailAddress { get; set; }
     
     public string Role { get; set; }
     
     public string UserId { get; set; }
     
     public DateTime DateofJoining { get; set; }
     
     public string Status { get; set; }
 }

At Single Property Level -

 public class Usermodel
 {
     [Required]
     public string Username { get; set; }

     [Required]
     public string Password { get; set; }

     [ValidateNever]
     public string EmailAddress { get; set; }

     [ValidateNever]
     public string Role { get; set; }

     [ValidateNever]
     public string UserId { get; set; }

     [ValidateNever]
     public DateTime DateofJoining { get; set; }

     [ValidateNever]
     public string Status { get; set; }
 }

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