向access数据库插入数据提示插入语法错误
protected void Button1_Click(object sender, EventArgs e)
{
string a, b;
a = this.TextBox1.Text;
b = this.TextBox2.Text;
string con = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="+Server.MapPath("bank.mdb");
OleDbConnection myConnection = new OleDbConnection(con);
OleDbCommand myCommand = new OleDbCommand("Insert into secret(user,passwd) values('"+a+"','"+b+"')",myConnection);
myConnection.Open();
myCommand.ExecuteNonQuery();
myConnection.Close();
}