如何使用数据注释验证验证给定数量不大于某个数量？

Question

我有一个class

Public class Transaction{

[Required]
//[RegularExpression(@"\d{1, 5}\.\d{1,2}", ErrorMessage = "Amount has to be 
positive and upto 2 decimal places")]
[Range(0, 20000, ErrorMessage = "Maximum transaction amount can not exceed 
20000.")]
[RegularExpression(@"^[0-9]*(\.[0-9]{1,2})?$", ErrorMessage = "Amount has to 
be positive and upto 2 decimal places")]
public float Amount { get; set; }

}

我不希望用户输入大于 20K 的金额，并且在任何时候都只能保留两位小数。

我已经写了上面的验证，但是当我输入一个大数字时，比如 1453668789564565656。看起来范围验证抛出异常 "value was either too large or too small for an int32."

有人可以在这里指导我吗？我怎样才能完成这项工作？

Answer 1

您需要使用带双参数的构造函数，即

[Range(0.0, 20000.0, ErrorMessage = "Maximum transaction amount can not exceed 20000.")]

如何使用数据注释验证验证给定数量不大于某个数量？

How to validate that a given amount is not greater than some amount using Data annotation validations?

c#

asp.net-mvc

validation

data-annotations