Character Casing in a Password Textbox

[benschol]

Please how I can to validate or determine the Character Casing in a Password Textbox in Vb.Net (NOT Asp.NET) when the Application compare the Text write by the User with the Password in a DataBase?

Thanks!

 

[kulrom]

I'm not sure (maybe someone know better) but as much as i know for vb.net case sensitivity (there is no just simple solution) it would be a loop...obviously. actually you will have to pass each char through loop and compare with that certain from DB.


Cheers

 

[jmcilhinney]

When using the "=" operator to compare strings, it depends on whether Option Compare is set to Binary or Text. If it is set to Binary, using "=" performs a case-sensitive comparison. If it is set to Text, "=" performs a case-insensitive comparison.

You can use String.Compare to perform either type of comparison regardless of the value of Option Compare. String.Compare(string1, string2, True) will perform a case-insensitive comparison and return zero if the two strings match, e.g.

String.Compare("HELLO", "hello", True)

would return zero. Change the third argument to False to perform a case-sensitive comparison. Do a help search on "string.compare" for the details of all overloads.

 

[kulrom]

well that will return only 1, 0, -1 ... but what if you want to check where the difference is? What are the letters that don't match that from DB?

Cheers

 

[jmcilhinney]

well that will return only 1, 0, -1 ... but what if you want to check where the difference is? What are the letters that don't match that from DB?

Cheers

Quite true, but I thought we were validating a password here. Generally a password is simply valid or not, without regard for where the differences are.

 

[benschol]

Thanks very much to both Moderators for the fast and good replies!! Now I have a very clear idea about the problem and solution. Regards!!