Validation for mastercard

Tan Kai Kai

13y2.7kVisual Basic .NET

Need help Validation for Credit Card in asp.net for C#

6 Replies

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Jignesh Trivedi13y ago
hi,
there is regex validation control in asp.net, this can be use to validate Master card number.
in Regex validation control, you must put your regex in ValidationExpression property.
Please refer following link to know more about it.
http://msdn.microsoft.com/en-us/library/ff650303.aspx
hope this will help you.
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Tan Kai Kai13y ago
I still can can you teach me how do I put those in?
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Vulpes13y ago
Here's some C# code which shows how you can do simple validation of a MasterCard number:

using System;
using System.Text.RegularExpressions;

class Test
{
static void Main()
{
string ccn = "5145 0023 5345 7812";
bool isValid = Validate(ccn); // True
Console.WriteLine(isValid);
Console.ReadKey();
}

static bool Validate(string ccn)
{
// get rid of any spaces
ccn = ccn.Replace(" ", "");
string regExp = "^5[1-5][0-9]{14}$";
return Regex.IsMatch(ccn, regExp);
}
}

However, in addition to this, you can further reduce the chances that it's an invalid card number by checking that it's consistent with the LUHN algorithm.

See the link below for how to do this:

http://www.superstarcoders.com/blogs/posts/luhn-validation-for-asp-net-web-forms-and-mvc.aspx

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Sanjeeb Lenka13y ago
check this link

http://www.w3resource.com/javascript/form/credit-card-validation.php
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Tan Kai Kai13y ago
Do you have any link that teach e step by setp how to do?
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Vulpes13y ago
The following regular expression should validate a credit card number as being a potential MasterCard number as these always begin with 51 to 55 and then have 14 other digits:

string regExp = "^5[1-5][0-9]{14}$";
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