如何在RegularExpression属性上添加多行选项? [英] How to add multiline option on RegularExpression attribute?

问题描述

我正在使用:

[RegularExpression(@"^(""|\[)?[a-zA-Z0-9']{1,125}(""|\])?$")]

确保多行文本框的每一行都正确匹配.但是，我无法弄清楚如何添加全局标志和多行标志选项.用MVC不可能吗?我还有什么其他选择?

to make sure each line of a multiline textbox is properly matched. I cannot however figure out how to add the global flag and multline flag options. Is it impossible with MVC? What other options do I have?

推荐答案

它看起来不像

It doesn't look like the RegularExpressionAttribute supports passing options, so here's one that allows it (compile checked but not tested):

[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter, 
                         AllowMultiple = false)]
public class RegExAttribute : ValidationAttribute
{
    public string Pattern { get; set; }
    public RegexOptions Options { get; set; }

    public RegExAttribute(string pattern) : this(pattern, RegexOptions.None) { }
    public RegExAttribute(string pattern, RegexOptions options)
    {
        Pattern = pattern;
        Options = options;
    }

    public override bool IsValid(object value)
    {
        return Regex.IsMatch(value.ToString(), Pattern, Options);
    }
}

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