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C# code:
using MySql.Data.MySqlClient;
public static bool IsExist(string username)
{
string myconnectionstring = "server=192.168.1.208;User Id=root;password=123;Database=dressroom";
MySqlConnection myconnection = new MySqlConnection(myconnectionstring);
M ......

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<?php
$link=mysql_connect("localhost","root","");
if(!$link) echo "ʧ°Ü!";
else echo "³É¹¦!";
mysql_close();
?>
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