blocks|key|289390|text|4个字母数字字符后面跟着6到7个小数位数的正则表达式是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|289391|var+regex+=+@"%5E\w{4}\d{6,7}$";|code-block|syntax|javascript|289392|请参阅：正则表达式语言-快速引用|offset|length|289393|Regex.Match法返回一个匹配对象。成功属性指示匹配是否成功。|289394|var+match+=+Regex.Match(input,+regex,+RegexOptions.IgnoreCase);

if+(!match.Success)
{
++++//+does+not+match
}|289395|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/az24scfc.aspx|1|http://msdn.microsoft.com/en-us/library/twcw2f1c.aspx|2|http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.match.aspx|3|http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.group.success.aspx^0|0|0|4|C|0|0|0|C|1|G|2|2|L|4|3|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@$I|15|J|16|1|17]]|A|$]]|$1|K|3|L|5|6|7|18|8|@]|9|@$I|19|J|1A|1|1B]|$I|1C|J|1D|1|1E]|$I|1F|J|1G|1|1H]]|A|$]]|$1|M|3|N|5|D|7|1I|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]|W|$5|R|S|T|A|$U|X]]|Y|$5|R|S|T|A|$U|Z]]|10|$5|R|S|T|A|$U|11]]]]

The regex for 4 alphanumeric characters follows by 6 to 7 decimal digits is:

<pre><code>var regex = @"^\w{4}\d{6,7}$";
</code></pre>

See: <a href="http://msdn.microsoft.com/en-us/library/az24scfc.aspx" rel="noreferrer">Regular Expression Language - Quick Reference</a>

<hr>

The <a href="http://msdn.microsoft.com/en-us/library/twcw2f1c.aspx" rel="noreferrer">Regex.Match Method</a> returns a <a href="http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.match.aspx" rel="noreferrer">Match</a> object. The <a href="http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.group.success.aspx" rel="noreferrer">Success Property</a> indicates whether the match is successful or not.

<pre><code>var match = Regex.Match(input, regex, RegexOptions.IgnoreCase);

if (!match.Success)
{
 // does not match
}
</code></pre>

blocks|key|113495|text|你的条件是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|113496|前四个字符必须是字母数字：[A-Za-z\d]{4}|ordered-list-item|offset|length|style|CODE|113497|后面跟着6或7个数值：\d{6,7}|113498|把它放在一起并锚定它：|113499|%5E[A-Za-z\d]{4}\d{6,7}\z|code-block|syntax|javascript|113500|这在一定程度上取决于你如何定义“字母数字”。另外，如果您使用的是忽略大小写标志，那么您可以从表达式中删除A-Z范围。|113501|entityMap^0|0|D|D|0|B|7|0|0|0|1G|3|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|W|8|@$E|X|F|Y|G|H]]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@$E|10|F|11|G|H]]|9|@]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|O|7|13|8|@]|9|@]|A|$P|Q]]|$1|R|3|S|5|6|7|14|8|@$E|15|F|16|G|H]]|9|@]|A|$]]|$1|T|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|U|$]]

Your conditions give:

<ol>
<li>The first four characters must be alphanumeric: <code>[A-Za-z\d]{4}</code></li>
<li>Followed by 6 or 7 numeric values: <code>\d{6,7}</code></li>
</ol>

Put it together and anchor it:

<pre><code>^[A-Za-z\d]{4}\d{6,7}\z
</code></pre>

Altho that depends a bit how you define "alphanumeric". Also if you are using ignore case flag then you can remove the <code>A-Z</code> range from the expression.

blocks|key|289427|text|尝试以下模式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|289428|@"%5E[A-za-z\d]{4}\d{6,7}$"|code-block|syntax|javascript|289429|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try the following pattern:

<pre><code>@"^[A-za-z\d]{4}\d{6,7}$"
</code></pre>

blocks|key|113546|text|下面的代码演示regex的用法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|113547|++++++++var+cc1+=+"FOOBAR";+//+should+fail.
++++++++var+cc2+=+"AAAA1111111";+//+should+succeed
++++++++var+r+=+new+Regex(@"%5E[0-9a-zA-Z]{4}\d{6,7}$");
++++++++if+(!r.IsMatch(cc2))
++++++++{
++++++++++++Console.WriteLine("cc2+doesn't+match");
++++++++}
++++++++if+(!r.IsMatch(cc1))
++++++++{
++++++++++++Console.WriteLine("cc1+doesn't+match");
++++++++}|code-block|syntax|javascript|113548|输出将是cc1+doesn't+match。|offset|length|style|CODE|113549|entityMap^0|0|0|4|H|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

The following code demonstrates the regex usage:

<pre><code> var cc1 = "FOOBAR"; // should fail.
 var cc2 = "AAAA1111111"; // should succeed
 var r = new Regex(@"^[0-9a-zA-Z]{4}\d{6,7}$");
 if (!r.IsMatch(cc2))
 {
 Console.WriteLine("cc2 doesn't match");
 }
 if (!r.IsMatch(cc1))
 {
 Console.WriteLine("cc1 doesn't match");
 }
</code></pre>

The output will be <code>cc1 doesn't match</code>.

I've written a Regular expression which should validate a string using the following rules:

<ol>
<li>The first four characters must be alphanumeric. </li>
<li>The alpha characters are followed by 6 or 7 numeric values for a total length of 10 or 11.</li>
</ol>

So the string should look like this if its valid:

<blockquote>
 CCCCNNNNNN or CCCCNNNNNNN
</blockquote>

C being any character and N being a number.

My expression is written: <code>@"^[0-9A-Za-z]{3}[0-9A-Za-z-]\d{0,21}$";</code>

My regex match code looks like this:

<pre><code>var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111111"; // should succeed

var regex = @"^[0-9A-Za-z]{3}[0-9A-Za-z-]\d{0,21}$";

Match match = Regex.Match( cc1, regex, RegexOptions.IgnoreCase );

if ( cc1 != string.Empty &amp;&amp; match.Success )
{
 //"The Number must start with 4 letters and contain no numbers.",
 Error = SeverityType.Error
}
</code></pre>

I'm hoping someone can take a look at my expression and offer some feedback on improvements to produce a valid match.

Also, am I use <code>.Match()</code> correctly? If <code>Match.Success</code> is <code>true</code>, then does that mean that the string is valid?

C# Regex Validation Rule using Regex.Match()

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我编写了一个正则表达式，它应该使用以下规则验证字符串：前四个字符必须是字母数字。alpha字符后面跟着6或7个数值，总长度为10或11。因此，如果字符串有效的话，该字符串应该如下所示：CCCCNNNNNN或CCCCNNNNNNC是任何字符，N是数字。我的表达式是写的：@"^[0-9A-Za-z]{3}[0-9A-Za-...

问使用C# ()的Regex.Match Regex验证规则
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