I need to validate if a the ID number that the user typed in my site is a valid ID.
How do I check it?
Do I need to use RegularExpressionValidator?
More over, I also need to validate the credit card number, I found a few RegularExpressions for that in the net but each one is different from the other and I am not sure which one to use.. Does anyone know od a working expression that will suit all credit cards?
I want to validate complete Email address. I am not asking to match using pericular string. but suppose someone enter email id email@example.com then first the bnm should be validated and if such domain found then also it should check for such firstname.lastname@example.org is available or invalid.???
Please help to understand this RegEx statement in details. It's supposed to validate filename from ASP.Net FileUpload control to allow only jpeg and gif files. It was designed by somebody else and I do not completely understand it. It works fine in Internet Explorer 7.0 but not in Firefox 3.6.
area code should be entered in paranetheses is mandatory after area code there should be hypen and only three digit should be allowed to enter that is mandatory after 3 digit again hypen should be there that is mandatory and then 4 digit should be enter that is mandatory.
I'm trying to use the regular expression validator for a numeric ID field.The field needs to be a required field of any number.Currently, I'm using:
Shouldn't this make it so the user has to at least enter 1 digit?? If I hit the submit button with the field empty,it passes validation and posts back.But if I enter non-numeric characters, it errors fine. If I wanted zero or more occurrences,I'd use:
Why isn't this working? Do I need to use this in combination with a Required Field Validator? That would suck ><
I have been trying to figure out how to use <asp:requiredfieldvalidator> with ValidationExpression but am having a difficult time understanding the syntax of ValidationExpression. I'd like to make sure one textbox's number (1-12) is equal to or higher than the other textbox's (1-12) number. How is this accomplished and what's the syntax of ValidationExpression (hopefully I'm stating the question correctly).
I have a peculiar situation at hand in which I need to validate a pair of dates in an ASP.Net web app.This is how my page looks like : I have a "From Date" field which consists a set of three dropdownlists ( for Year , Month and Date) I have a "To Date" field which also consists a set of three dropdownlists ( for Year , Month and Date). There is a "Download Report" button on the screen ( which allows a user to download a report for the specified date range) All these six dropdownlists are wrapped in a user control. Now all the 6 dropdownlists have a default "please select" value. When a user lands on the page for the first time , all dropdownlists are set to "please select". The "Download" button is enabled only after valid 'From' and 'To' dates are selected. Now my requirement is that :
When a user lands on the page for the first time , no attempt to validate the dates should be made until he selects all the 6 dropdownlists at least once. When the 6th dropdownlist is selected , the From and To dates should be validated. Once a user has selected all 6 dropdowns once , subsequently on every dropdownlist postback , the dates should be validated. My Issue: What's the best way to track these 6 distinct postbacks ( for each of the dropdowns) before starting to validate the From and To Dates. I could maintain a flagin ViewState .. but is there a better way?
I have requirment to prevent enteries of same number occuring multiple times. Like 99999,1111111, 6666, are invalid. How can I acomplish this? Is there any general license validator funtion some one has writte?