asp.net-mvc DataAnnotation 验证属性的 Int 或 Number DataType
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Int or Number DataType for DataAnnotation validation attribute
提问by Antonin Jelinek
On my MVC3 project, I store score prediction for football/soccer/hockey/... sport game. So one of properties of my prediction class looks like this:
在我的 MVC3 项目中，我存储了足球/足球/曲棍球/...体育比赛的得分预测。所以我的预测类的属性之一如下所示：
[Range(0, 15, ErrorMessage = "Can only be between 0 .. 15")]
[StringLength(2, ErrorMessage = "Max 2 digits")]
[Remote("PredictionOK", "Predict", ErrorMessage = "Prediction can only be a number in range 0 .. 15")]
public int? HomeTeamPrediction { get; set; }
Now, I need also change error message for a data type, intin my case. There is some default one used - "The field HomeTeamPrediction must be a number.". Need to find a way how to change this error message. This validation message also seem to take prediction for Remote validation one.
现在，就我而言，我还需要更改数据类型的错误消息int。使用了一些默认值 - “HomeTeamPrediction 字段必须是一个数字。”。需要找到一种方法来更改此错误消息。此验证消息似乎也对远程验证进行了预测。
I've tried [DataType]attribute but this does not seem to be plain number in system.componentmodel.dataannotations.datatypeenumeration.
我试过[DataType]属性，但这似乎不是system.componentmodel.dataannotations.datatype枚举中的普通数字。
回答by Dilip0165
For any number validation you have to use different different range validation as per your requirements :
对于任何数字验证，您必须根据您的要求使用不同的不同范围验证：
For Integer
对于整数
[Range(0, int.MaxValue, ErrorMessage = "Please enter valid integer Number")]
for float
浮动
[Range(0, float.MaxValue, ErrorMessage = "Please enter valid float Number")]
for double
双人
[Range(0, double.MaxValue, ErrorMessage = "Please enter valid doubleNumber")]
回答by Goran ?uri
Try one of these regular expressions:
尝试以下正则表达式之一：
// for numbers that need to start with a zero
[RegularExpression("([0-9]+)")]
// for numbers that begin from 1
[RegularExpression("([1-9][0-9]*)")]
hope it helps :D
希望它有帮助：D
回答by Sathish
Use regex in data annotation
在数据注释中使用正则表达式
[RegularExpression("([0-9]+)", ErrorMessage = "Please enter valid Number")]
public int MaxJsonLength { get; set; }
回答by Stefan Turcanu
Try this attribute :
试试这个属性：
public class NumericAttribute : ValidationAttribute, IClientValidatable {
public override bool IsValid(object value) {
return value.ToString().All(c => (c >= '0' && c <= '9') || c == '-' || c == ' ');
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context) {
var rule = new ModelClientValidationRule
{
ErrorMessage = FormatErrorMessage(metadata.DisplayName),
ValidationType = "numeric"
};
yield return rule;
}
}
And also you must register the attribute in the validator plugin:
您还必须在验证器插件中注册该属性：
if($.validator){
$.validator.unobtrusive.adapters.add(
'numeric', [], function (options) {
options.rules['numeric'] = options.params;
options.messages['numeric'] = options.message;
}
);
}
回答by stuartdotnet
public class IsNumericAttribute : ValidationAttribute
{
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (value != null)
{
decimal val;
var isNumeric = decimal.TryParse(value.ToString(), out val);
if (!isNumeric)
{
return new ValidationResult("Must be numeric");
}
}
return ValidationResult.Success;
}
}
回答by Laz Ziya
almost a decade passed but the issue still valid with Asp.Net Core 2.2 as well.
将近十年过去了，但这个问题在 Asp.Net Core 2.2 中仍然有效。
I managed it by adding data-val-numberto the input field the use localization on the message:
我通过将data-val-number消息的使用本地化添加到输入字段来管理它：
<input asp-for="Age" data-val-number="@_localize["Please enter a valid number."]"/>
