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Secret of Range Validator in ASP.NET

Suppose you are using Range validator for a textbox for validating a range between 1 to 100 and you have written the code like:
 
Previous code :
<asp:TextBox ID="txtControl" runat="server" MaxLength="3" Width="30" /> 
 
<asp:RangeValidator ID="rv_txtControl" runat="server"
                    ControlToValidate="txtControl"
                    MinimumValue="1" MaximumValue="100"
                    Text="*" Display="Dynamic"
                    ErrorMessage="Range Exceeds">
</asp:RangeValidator>
 
<asp:Button ID="btnValidate" runat="server" Text="Validate" />

Now if I provide values like 0, 101, 200, it will show an error message which is the correct behaviour. But if I provide values like 001 or 002 then also it will show me error message which is not correct behaviour. So how we can handle this situation? You can use the following code instead of the above one.

 Changed Code :

 

<asp:TextBox ID="txtControl" runat="server" MaxLength="3" Width="30" /> 
<asp:RangeValidator ID="rv_txtControl" runat="server"
                    ControlToValidate="txtControl"
                    MinimumValue="001 MaximumValue="100" 
                    Text="*" Display="Dynamic"
                    ErrorMessage="Range Exceeds">
</asp:RangeValidator>
<asp:Button ID="btnValidate" runat="server" Text="Validate" />
The only change I have made is changing the MinimumValue from 1 to 001. From now the range validator will not show error message for values like 01, 001, 002.
 
This is a very simple thing but it is very useful while dealing with Range validator.

 

Devi Das , ASP.Net Programmer, Mindfire Solutions.
Related Tags: ASP.NET, Validator
Author : Devi Das

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