^[-+]?\d{0,2}(\.\d{1,2})?$
ex:可以使用RegularExpressionValidator來進行前端javascript的判斷
<WebControl:RegularExpressionValidator ID="RegularExpressionValidator1"
runat="server" ControlToValidate="txtRate"
ValidationExpression="^[-+]?\d{0,2}(\.\d{1,2})?$"
ErrorMessage="所輸入的值不可超過100,小數為數最多兩位">*</WebControl:RegularExpressionValidator>














