如果.Net核心3.1控制器结果为空且未请求，则忽略某些属性

public class MyModel
{
    public string Property1 { get; set; }
    
    [BindNever]
    public string Property2 { get; set; }
}

public class MyModelBinder : IModelBinder
{
    public Task BindModelAsync(ModelBindingContext bindingContext)
    {
        var model = new MyModel();
        
        // 绑定除Property2以外的属性
        bindingContext.ModelMetadata.Properties
            .Where(p => p.PropertyName != "Property2")
            .ToList()
            .ForEach(p => p.Model = bindingContext.ValueProvider.GetValue(p.PropertyName).FirstValue);
        
        bindingContext.Result = ModelBindingResult.Success(model);
        return Task.CompletedTask;
    }
}

[HttpPost]
public IActionResult MyAction([ModelBinder(typeof(MyModelBinder))] MyModel model)
{
    // ...
}

public class MyModelValidator : IModelValidator
{
    public IEnumerable<ModelValidationResult> Validate(ModelValidationContext validationContext)
    {
        var model = (MyModel)validationContext.Model;
        
        // 忽略Property2的验证
        if (string.IsNullOrEmpty(model.Property2))
        {
            yield return new ModelValidationResult("", "Property2 is required.");
        }
    }
}

[HttpPost]
public IActionResult MyAction([CustomValidator(typeof(MyModelValidator))] MyModel model)
{
    // ...
}