asp.net – SqlConnection localhost用户名失败

我的数据库在我的计算机上(localhost),当我点击“提交”按钮时它会抛出异常：

SQLException was unhandled by user code. Login failed for user “.

protected void Register_Click(object sender,EventArgs e)
    {
        SqlConnection connection = new SqlConnection("server = localhost ;uid=; Password= database = Movies;");
        connection.Open();
        //FirstName***********
        string firstName = UsernameTextBox.Text;
        string sqlquery = ("INSERT INTO [Movie] (FirstName) VALUES (' " +FirstNameTextBox.Text + " ' ");

        SqlCommand command = new SqlCommand(sqlquery,connection);
        command.Parameters.AddWithValue("FirstName",firstName);

由于服务器在我的电脑上,我没有任何用户名,对吧？！