Unrecognized escape sequence in C# SQL

I 've faced an problem in SQL server database connectivity from C# its all because my server name consist of  "\" ,C# read \ as n escape sequence to resolve this problem  use "@" symbol before the connectivity statement.

("Server=DIVI-PC\SQLEXPRESS;database=project")

Here is the problem there is "\" after the DIVI-PC C# reads its as an escape sequence so it is not possible to connect with sql  to Solve this problem add "@"

(@"Server=DIVI-PC\SQLEXPRESS;database=project")

Now it 'll work .

NOTE : Don't forget to add username and passwords

Suggestions are always welcome !!

PHP to email

PHP uses email function to send email from php code . To send email u must need to create header . Before that First create an HTML form .

First Name * :

Last Name * :

Email Address * :

Company Name :

Designation :

Phone :

Mobile :

Messange * :

After clicking the Submit button send_form_email.php page will be called

if(isset($_POST['email'])) {

$email_to = "yourname@maildomain.com"; //change to ur mail id

$email_subject = "Enquiry";

function died($error)

{

echo "These errors appear below.

";

echo $error."

";

echo "Please go back and fix these errors.

";

die();

}

// validation expected data exists

if(!isset($_POST['first_name']) ||

!isset($_POST['last_name']) ||

!isset($_POST['email']) ||

!isset($_POST['telephone']) ||

!isset($_POST['comments'])) {

died('There is an Error in ur Filled form');

}

$first_name = $_POST['first_name']; // required

$last_name = $_POST['last_name']; // required

$email_from = $_POST['email']; // required

$company = $_POST['company'];// not required

$designation = $_POST['designation'];// not required

$telephone = $_POST['telephone']; // not required

$mobile = $_POST['mobile']; //not required

$comments = $_POST['comments']; // required

$error_message = "";

$email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';

if(!preg_match($email_exp,$email_from)) {

$error_message .= 'The Email Address you entered does not appear to be valid.
';

}

$string_exp = "/^[A-Za-z .'-]+$/";

if(!preg_match($string_exp,$first_name)) {

$error_message .= 'The First Name you entered does not appear to be valid.
';

}

if(!preg_match($string_exp,$last_name)) {

$error_message .= 'The Last Name you entered does not appear to be valid.
';

}

if(strlen($comments) < 2) {

$error_message .= 'The Comments you entered do not appear to be valid.
';

}

if(strlen($error_message) > 0) {

died($error_message);

}

$email_message = "Form details below.\n\n";

function clean_string($string) {

$bad = array("content-type","bcc:","to:","cc:","href");

return str_replace($bad,"",$string);

}

$email_message .= "First Name: ".clean_string($first_name)."\n";

$email_message .= "Last Name: ".clean_string($last_name)."\n";

$email_message .= "Email: ".clean_string($email_from)."\n";

$email_message .= "Company Name: ".clean_string($company)."\n";

$email_message .= "Designation : ".clean_string($designation)."\n";

$email_message .= "Telephone: ".clean_string($telephone)."\n";

$email_message .= "Mobile: ".clean_string($mobile)."\n";

$email_message .= "Comments: ".clean_string($comments)."\n";

// create email headers

$headers = 'From: '.$email_from."\r\n".

'Reply-To: '.$email_from."\r\n" .

'X-Mailer: PHP/' . phpversion();

mail($email_to, $email_subject, $email_message, $headers);

?>

How to Validate only Numbers in Textbox

To validate only numbers in text box.

Step 1: Desing a Textbox in asp.net .

Step 2 : Goto Coding side of the page .

Step 3: Post the following coding

<asp:regularexpressionvalidator controltovalidate="TextBox9" errormessage="Please Enter Numbers Only " id="RegularExpressionValidator2" runat="server" validationexpression="^\d+$" validationgroup="check"></asp:regularexpressionvalidator>

How to Validate E-Mail address in Asp.net Text box

To validate E-mail address in asp.net Text box .

Step 1: Design a Textbox and post in web page.

Step 2: Enter in to the Coding mode .

Step3: Below the Textbox coding enter the following expression coding.

   <asp:RegularExpressionValidator id="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox10"
  ErrorMessage="You must enter an email address"
  ValidationExpression="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*">
</asp:RegularExpressionValidator>

Step 4: Press F5 and validate the text box.