RangeValidator alwayr returns false

[jiznena]

i wanna use RangeValidator but it always returns false,even i give the right numbers

<asp:RangeValidator ID="RangeValidator1" runat="server" ControlToValidate="TextBox1"
ErrorMessage="Tc kimlik no 11 rakamlı olmalı" ForeColor="White" MaximumValue="11"
MinimumValue="11" Type="Double">*</asp:RangeValidator>

someone to help me on this matter?

[kenobewan]

Welcome to TSDN. Not sure why you are using rv to check one number?

[jiznena]

Welcome to TSDN. Not sure why you are using rv to check one number?

I have web form, on which i should do some controls like; checking if given string only contains numbers and the string length should be 11. Also i should check if given string only has letters in it. I'm writing in C# .net and tried to do the controls with RangeValidator but it doesnt work. Searched little on google and found out that validation controls can be also done with javascipt, but dont know anything about javascript. Can u help me on this matter?

[kenobewan]

I suggest you use JS, probably with regular expressions:
Regular Expressions in JavaScript

[rohitbce]

at the design time only u put the max length and minimum lengh property of ranfg validator