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private void but_login_Click(object sender, EventArgs e)
{
string constring = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\\³ÌÐòÁ·Ï°\\database\\data.accdb;Persist Security Info=False ";
OdbcCommand comm = new OdbcCommand();
OdbcConnection conn = new OdbcConnection();
conn.ConnectionString = constring;
comm.Connection = conn;
conn.Open();
comm.CommandText = "select * from user where user_name="+teb_username.Text +"and user_password="+teb_password.Text;
OdbcDataReader reader = new OdbcDataReader();
reader = comm.ExecuteReader();
if (reader.HasRows)
.........
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