基于另一个属性的范围验证

Currently I have the model FooModel

目前我有模型FooModel

public class FooModel
{
    [Range(0.001, 10000, ErrorMessage = "{0} must be a decimal/number between {1} and {2}.")]
    [RangeValidator("BarMax")]
    public decimal? Bar { get; set; }

    public decimal BarMax { get; set; }
}

Following suggestions I created a custom range validator

根据建议，我创建了一个自定义范围验证器

public class RangeValidator : ValidationAttribute
{
    private readonly string dependentPropery;

    public RangeValidator(string dependentpropery)
        : base()
    {
        this.dependentPropery = dependentpropery;
    }

    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        System.Reflection.PropertyInfo property = validationContext.ObjectType.GetProperty(this.dependentPropery);
        if (property == null)
        {
            return new ValidationResult(string.Format("Unknown Property {0}", this.dependentPropery));
        }

        var value1 = property.GetValue(validationContext.ObjectInstance, null) as decimal?;
        if (!value1.HasValue)
        {
            return null;
        }

        decimal actualValue;

        if (value == null)
        {
            return new ValidationResult("Value can not be empty.");
        }

        decimal.TryParse(value.ToString(), out actualValue);
        if (actualValue <= 0)
        {
            return new ValidationResult(string.Format("{0} Value can not be empty.", this.dependentPropery));
        }

        return actualValue > value1.Value ? new ValidationResult(string.Format("Value cannot exceed {0} {1}.", this.dependentPropery, value1.Value)) : null;
    }
} 

1 个解决方案

#1

You can't in the range attribute, but you could add the MVC Foolproof Validation library. Then you can set your range to be the max that your storage or primitive type will hold, then use foolproof's lessthan to constrain it to the BarMax property.

您不能在range属性中，但可以添加MVC Foolproof Validation库。然后，您可以将范围设置为存储或基本类型将保留的最大范围，然后使用万无一失的小于将其约束到BarMax属性。