[英]Customize regular expression to allow alphabets and dots in textbox
Hello friends In my application I want to customize regular expression in such a way that it will allow character and dot only. 朋友您好在我的应用程序中,我希望以仅允许使用字符和点的方式自定义正则表达式。 For eg.
例如。 I could be be able to enter MCA or MCA any of these.
我可以输入以下任意一项的MCA或MCA。 For this task how to customize regular expression?
对于此任务,如何自定义正则表达式? I tried [a-zA-Z] followed by\\ and dot in side bracket but is not working.
我尝试了[a-zA-Z],后跟\\,并在方括号中加了点,但没有用。 I also tried [ABCD] just for testing but it shows invalid text for ABC.
我还尝试了[ABCD]只是为了进行测试,但是它显示了ABC无效的文本。 What might be the reason????
可能是什么原因???? Thanks to all...
谢谢大家...
You will need to escape the dot as in regex it normally means 'any character' 您需要像正则表达式中那样转义该点,通常表示“任何字符”
[a-zA-Z\.]+
in c# you will need to deinfe the regex string as follows: 在C#中,您需要按如下所示定义正则表达式字符串:
var r = @"[a-zA-Z\.]+";
Edit based on comment: 根据评论进行编辑:
<asp:TextBox ID="qualificationBox" runat="server" Width="250px"></asp:TextBox>
<asp:RegularExpressionValidator ID="NameRequiredValidator" runat="server"
ErrorMessage="Please Enter Name" ControlToValidate="qualificationBox"
ValidationExpression="[a-zA-Z\.]+"></asp:RegularExpressionValidator>
您可能需要加倍转义反斜杠:
[a-zA-Z\\.]+
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