1. 在ViewModel中使用Annotations进行验证：

public class MyViewModel
{
    [Range(1, 100, ErrorMessage = "Age must be between 1 and 100")]
    public int Age { get; set; }
}

2. 使用ModelState.IsValid属性进行验证：

[HttpPost]
public IActionResult MyAction(MyViewModel model)
{
    if (ModelState.IsValid)
    {
        //If the Model state is valid, do something
    }
    else
    {
        return View(model);
    }
}

3. 自定义错误信息：

services.AddMvc()
    .AddMvcOptions(options => options.ModelBindingMessageProvider.SetValueMustNotBeNullAccessor(
        () => "The field is required"));

4. 重新定义数字字段数据类型：

[Range(typeof(decimal), "0", "99.99")]
public decimal Age { get; set; }