How to validate for a textbox 1 digit before decimal point and two digits after decimal point?

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1.00/5 (1 vote)

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I found a source where it is 6 digits before and two after but i do not know how to change

What I have tried:

<asp:TextBox ID="txtrate" runat="server" onkeypress="if(event.keyCode<48 || event.keyCode>57)event.returnValue=false;" MaxLength="9">

<asp:RegularExpressionValidator runat="server" ID="RegularExpressionValidator1"
ValidationExpression="^((\d{5})*|([1-9]\d{0,5}))(\.\d{0,2})?$"
ControlToValidate="txtrate" Text="Input must be 123456.78 format."
Display="Dynamic" />

Posted 6-Aug-16 5:26am

Member 12652110

Updated 6-Aug-16 6:06am

v3

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Patrice T · Accepted Answer · 2016-08-06T05:53:00

Try to state a question with a sentence telling what you want.
Use Improve question to update your question.

I guess you want to validate an input with another format than the example you found.
The tool used to do this is called Regular Expressions (RegEx)
Try this expression: ^\d\.\d{2}$
Here are tools to help you find what a RegEx is doing:
Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
Here is some documentation worth reading:
perlre - perldoc.perl.org[^]

OriginalGriff · Accepted Answer · 2016-08-06T05:46:00

Solution 1

Development isn't a process where you find something on the internet and paste it into your app: you are supposed to think about it and work out how it works (or better write it yourself).
In this case, you don't need anything that complex:

^\d\.\d\d$

Will do it.

Posted 6-Aug-16 5:46am

OriginalGriff

Comments

Member 12652110 6-Aug-16 11:54am

i tried
<asp:TextBox ID="txtrate" runat="server" onkeypress="if(event.keyCode<48 || event.keyCode>57)event.returnValue=false;" MaxLength="4">
<asp:RequiredFieldValidator id="RequiredFieldValidator5" runat="server" ErrorMessage="Rate is required!" ControlToValidate="txtrate" />
<asp:RegularExpressionValidator runat="server" ID="RegularExpressionValidator1"
ValidationExpression="^((\d{1})*|([1-9]\d{0,1}))(\.\d{0,2})?$"
ControlToValidate="txtrate" Text="Input must be 123456.78 format."
Display="Dynamic" />

Member 12652110 6-Aug-16 11:55am

but it wont show error message

Member 12652110 6-Aug-16 11:56am

could you help me out as i am a student and my deadline is tmr

BillWoodruff 6-Aug-16 12:12pm

And, who is responsible for your waiting until the last minute to study ?

Member 12652110 6-Aug-16 12:14pm

its not exam it was a project
I now realised that the flow was off for my validation thanks again if you could help