场景
我有一个自定义规则来验证订单的运费:
public class OrderValidator : BaseValidator<Order>
{
private string CustomInfo { get; set; }
public OrderValidator()
{
//here I call the custom validation method and I try to add the CustomInfo string in the message
RuleFor(order => order.ShippingCost).Cascade(CascadeMode.StopOnFirstFailure).NotNull().Must(
(order, shippingCost) => CheckOrderShippingCost(order, shippingCost)
).WithMessage("{PropertyName} not set or not correct: {PropertyValue}." + (String.IsNullOrEmpty(CustomInfo) ? "" : " " + CustomInfo));
}
//this is the custom validation method
private bool CheckOrderShippingCost(Order o, decimal shippingCost)
{
bool res = false;
try
{
/*
* check the actual shippingCost and set the res value
*/
}
catch (Exception ex)
{
CustomInfo = ex.ToString();
res = false;
}
return res;
}
}
如果出现异常,我将异常信息存储到 CustomInfo 私有(private)成员中,并将其添加到验证消息中。
然后我运行验证器:
OrderValidator oVal = new OrderValidator();
oVal.Results = oVal.Validate(order);
if (!oVal.Results.IsValid)
oVal.Results.Errors.ForEach(delegate(ValidationFailure error) {
Console.WriteLine(error.ErrorMessage);
});
问题
一切正常,在异常情况下 CustomInfo 被正确设置为 ex.ToString() 值。但最终显示在控制台中的错误消息并没有显示 CustomInfo,而是只显示了消息的第一部分:
"Shipping Cost not set or not correct: 5.9"
问题
为什么自定义消息不包含CustomInfo字符串? 是否可以通过其他方式将异常信息添加到自定义消息中?
最佳答案
你应该使用
.WithMessage("{PropertyName} not set or not correct: {PropertyValue}. {0}", order => order.CustomInfo);
这将要求您的 CustomInfo 在 Order 类级别,而不是您的验证器类
编辑
你可以使用:
public static class OrderExtensions
{
private static IDictionary<Order,string> customErrorMessages;
public static void SetError(this Order order, string message) {
if (customErrorMessages == null) {
customErrorMessages = new Dictionary<Order,string>();
}
if (customErrorMessages.ContainsKey(order)) {
customErrorMessages[order] = message;
return;
}
customErrorMessages.Add(order, message);
}
public static string GetError(this Order order) {
if (customErrorMessages == null || !customErrorMessages.ContainsKey(order)) {
return string.Empty;
}
return customErrorMessages[order];
}
}
对您的验证器进行一些小改动
public class OrderValidator : BaseValidator<Order>
{
public OrderValidator()
{
//here I call the custom validation method and I try to add the CustomInfo string in the message
RuleFor(order => order.ShippingCost).Cascade(CascadeMode.StopOnFirstFailure).NotNull().Must(
(order, shippingCost) => CheckOrderShippingCost(order, shippingCost)
).WithMessage("{PropertyName} not set or not correct: {PropertyValue}. {0}", order => order.GetError()));
}
//this is the custom validation method
private bool CheckOrderShippingCost(Order o, decimal shippingCost)
{
bool res = false;
try
{
/*
* check the actual shippingCost and set the res value
*/
}
catch (Exception ex)
{
order.SetError(ex.ToString());
res = false;
}
return res;
}
}
关于c# - 流利验证 : set custom message on custom validation,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25135658/