'regular expression not to allow zero

regular expression not to allow zero

it should allow 0.0000001 as value but should not allow to enter 0.

I need validator not javascript

Solution 1:^[1]

I think all you need is this ^(?=.*[1-9])\d*\.?\d*$

But, you could get fancy and allow only a single leading zero if its before a decimal point.
^(?=.*[1-9])(?:[1-9]\d*\.?|0?\.)\d*$

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" 
     ControlToValidate="TextBox1" ErrorMessage="Input is not valid." 
     ValidationExpression="^(?=.*[1-9])(?:[1-9]\d*\.?|0?\.)\d*$"></asp:RegularExpressionValidator>
<asp:Button ID="Button1" runat="server" Text="Button" />

Solution 2:^[2]

a regexp like that?

       ([1-9](\.[0-9]+)?)|(0\.[0-9]*[1-9])

looks like working ;-)

if you remove the braces it looks more understandable:

       [1-9](\.[0-9]+)? | 0\.[0-9]*[1-9]

Solution 3:^[3]

If you want to allow both Positive or Negative numbers but not 0:

^(-?.*[1-9])\d*\.?\d*$

Sources

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Source: Stack Overflow

Solution	Source
Solution 1
Solution 2
Solution 3	sptramp

'regular expression not to allow zero

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]

Solution 3:^[3]