Email validation regular expression do not work

Issue:
The dumb users copy email addresses with a space after and past to the email text box in a web form. They then found that they cannot submit the form. The email looks ok, but because there is a space behind the standard email validation regular expression declare it as wrong email.

Solution:
Standard Email validation regular expression is,
^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$

Add an extra space behind the standard regular expression to support dumb users,
^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z\s]{2,9})$

Resources:
http://msdn.microsoft.com/en-us/library/ms998267.aspx
http://msdn.microsoft.com/en-us/library/hs600312.aspx
http://www.regular-expressions.info/tutorial.html
http://regexlib.com/CheatSheet.aspx

How to use a network domain account for an ASP.NET applications which gets the logged on user name from the computer?

1.  In IIS 6 set the following in the application pool for the website.

 

 

2. Create the website and assign the above application pool.

3. Add the domain service account to the IIS WPG group on the hosting server.

 

 

 

4. In the web.config of the application add the following connection string

<add name=“Connection Name“ connectionString=“Data Source=ServerName;Initial Catalog=DatabaseName;Integrated Security=True” providerName=“System.Data.SqlClient“ />

5. In the web.config also add identity tag

<system.web> <identity impersonate=“true“ userName=“DomainName\DomainAccountName“ password=“DomainAccontPassword“/> <system.web>

6. Now in you code if you use the code below it will show the logged on user name

ASP.NET

<div class=”group”>
    <asp:Label ID=”lblSearchUserName” runat=”server”>User Name : </asp:Label> <asp:TextBox ID=”txtSearchUserName” CssClass=”Search” MaxLength=”10″                ValidationGroup=”vgSearchForm” runat=”server” /> (Eg.<%=Replace(Trim(Request.ServerVariables.Item(“LOGON_USER”).ToLower), “domainName\”, “”)%>) <br />
</div>

 

VB.NET

If (Not String.IsNullOrEmpty(Request.ServerVariables.Item(“LOGON_USER”))) Then Dim LogonUserName As String = Trim(Request.ServerVariables.Item(“LOGON_USER”).ToLower)

 ~~

 ~~

 Else             
             Response.Redirect(“Resources/Error/LogOnNameError.htm”)
End If ‘LOGON_USER

Reference:

http://msdn.microsoft.com/en-us/library/72wdk8cc.aspx