您只需将 MaxLength = 10 赋予文本框txtMobileNumber.

您可以使用 RegularExpression [ javascript [

You just give MaxLength=10 to the textbox txtMobileNumber.

You can use RegularExpression[^] or javascript[^]

Do customizations based on your need, that''s all.

为此，您可以使用仅包含数字的正则表达式.
有关详细信息，请看看

For that, you can use regular expressions, that takes onl y numbers.
For details, Have a look

您可以使用RegularExpression查找文本是否为数字.
下面是代码

You can use RegularExpression to find whether the text is number.
Below is the code

System.Text.RegularExpressions.Regex regularExpression = new System.Text.RegularExpressions.Regex("^-[0-9]+