Security :: Password Validation And Allow Special Characters?

May 31, 2010

i need a regular expression validator for password that should not allow some of the special characters like % ' " ; *. give me the expression such that it should allow special characters except the above and a numeric a capital letter and a small letter ...

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I need to construct a regular expression for the password textbox which shouldn't accept special characters($,@,!,etc).Even whitespaces,tabs. I tried the below this accepts special characters.

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I've built a web application that employees sign on to and take tests, get certifications, etc. My client wants all employees set up so that their user name is their real name, in the format of "Lastname, Firstname". It doesn't look like MembershipProvider will allow commas or spaces in the user name. Am I going to have to store this in a separate column in another table, or is there a way to tell the provider to accept those characters...

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I gave an option to user to change password but the text boxes are taking - / @ (special characters). How to check at runtime that user may not enter these characters?

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I've got a program that in a nutshell reads values from a SQL database and writes them to a tab-delimited text file.

The issue is that some of the values in the database have special characters (TM, dash, ellipsis, etc.) When written to the text file, the formatting is lost and they come across as junk "â„ or â€" etc"

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I'm fairly new to ASP.NET and have the following problem:

I add data to an Access database through a form on a aspx.-page. Now my problem is, if the user enters characters like " or & the syntax of the SQL command i send to access changes and the whole thing crashes. :-(

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Seconde question:

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System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +869
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System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +175
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565

The equvivalent error message appears when I klick on the "Edit"-Button...
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[Code]....

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buildLetter.Append("</head>").AppendLine();
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I want to use a regular expression validator but no idea what to write?

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I have to replace XML characters that are being sent to me like this:

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I want to make sure I have an exhaustive list of all possible characters, so we don't find one later after my programming change.

I was told to do these (by a developer at the client site who is passing me the xml as he gets it from the database and wants me to parse it):

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