Question

Need Validation Expression for over $10000

Asked by: DotNetChano

I need help building a validation expression that requires the textbox to have an amount equal to or greater than $10,000. I would like to be able to use it in the asp:regularexpressionvalidator rather than having it in the code behind.

Thanks

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Asked On
2009-11-05 at 09:48:28ID24875314
Tags

asp.net

,

validation expression

,

c#

Topics

Programming for ASP.NET

,

C# Programming Language

Participating Experts
4
Points
500
Comments
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Answers

 

by: BalkisBrPosted on 2009-11-05 at 10:46:48ID: 25752541

Hi,

I believe it would be better if you use a RangeValidator (or CustomValidator) to validate what you want.

You must be very creative to come up with a regex that validates the bottom limit of a value.

 

by: MRomaniPosted on 2009-11-05 at 10:51:44ID: 25752594

heres an example of how to use the regular expression regulator (see attached code).

For your case, just put whatever validation you want here:

 ValidationExpression="([0-9A-Z]{0,5})"



<div>
 
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>&nbsp;
 
<asp:Button ID="Button1" runat="server" Text="Button" />
 
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox1"
 
ErrorMessage="RegularExpressionValidator" ValidationExpression="([0-9A-Z]{0,5})"></asp:RegularExpressionValidator>
 
</div>
                                              
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by: MRomaniPosted on 2009-11-05 at 10:54:04ID: 25752628

if you wanna use a range validator, heres sample code:

So you can specify a min of 10000 which will ensure that nothing bellow that is accepted...

<asp:RangeValidator id="RangeValidator" runat="server" ErrorMessage="This Number Is Not In The Range" ControlToValidate="txtValidated" MaximumValue="10" MinimumValue="1" Type="Integer"></asp:RangeValidator><BR>
                                              
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by: DotNetChanoPosted on 2009-11-05 at 12:13:36ID: 25753437

Thanks for your help. I think what I am looking for is a little more complex. I want the user to be able to enter:
$10,000.00
$10000.00
$10000
10,000.00
10000.00
10000

but not enter any format of anything 9999 or below

with the dollar sign included i cant make it accept integers only can I?

 

by: MRomaniPosted on 2009-11-05 at 12:18:19ID: 25753479

i think a range validator would work fine, you set your min at 9999.99 and they wont be able to enter anything below that #...

 

by: DotNetChanoPosted on 2009-11-05 at 12:25:21ID: 25753567

what if they enter a $ sign?

 

by: jhshuklaPosted on 2009-11-05 at 12:35:38ID: 25753700

how about this regex: ${0,1}0*[1-9]+[0-9]{4,}\.{0,1}[0-9]*
${0,1} = optional $ sign
0* = allows leading zeros
[1-9]+[0-9]{4,} = 10000 or more
\.{0,1}[0-9]* = optional digits after decimal point

Note that above regex does not take care of thousands separator.

 

by: MRomaniPosted on 2009-11-05 at 12:35:49ID: 25753703

then you can also use (as an extra) the ValidationExpression,
ex:

ValidationExpression="([0--9])"> which will indicate that only numbers are allowed, no other characters.

 

by: MRomaniPosted on 2009-11-05 at 12:36:37ID: 25753713

yea, i agree with jhshukla, thats a nice way to do it.

 

by: DotNetChanoPosted on 2009-11-05 at 13:01:14ID: 25753979

jshukla

what do you mean that it does not take care of thousands separator? Does it allow it, not allow it, or is indifferent to it? Im new to asp.net and these validators.

Thanks

 

by: jhshuklaPosted on 2009-11-05 at 16:40:23ID: 25755730

it does not allow thosands separator. the problem with making it optional is that you have make sure it is either present at every valid place or none at all. regexes do not allow you to do that. BNF grammar does.

you can make a complicated one by combining two regexes -- one that does not allow and one that requires. let's call them A & B. you final regex would be (A)|(B). A is already defined in my previous post. I tried to write B but could not get it right. I will try again.

 

by: Kyle_BCBSLAPosted on 2009-11-06 at 05:19:45ID: 25758794

@DotNetChano

However, if you do use the regular expression and a user attempts to enter a comma it will not allow it.  This forces the user to enter just numerics.  If you have your datatype set up right on the back end, such as a datatype Money, then when the value is displayed to the screen after submission it can then show the dollar sign and commas.  

Otherwise, you can use javascript or jquery to track the # of characters entered and after every 3 numerics have client side javascript enter a comma.  Nonetheless, your database will not like commas so even if they are displayed to your user, prior to submission, you will have to strip them away again.  That is just messy........

20120131-EE-VQP-002

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