使用方法 'mysql_native_password' 对用户 'root' 的主机 'localhost' 进行身份验证失败并显示消息（使用密码：否）

Question

Can you help me guys for my thesis and this is one of my problem in my system.

MySqlConnection cn2 = new MySqlConnection(cn.ConnectionString);
cn2.Open();-->>> Authentication to host 'localhost' for user 'root' using method 'mysql_native_password' failed with message: Access denied for user 'root'@'localhost' (using password: NO)

listView1.Items.Clear();
string sql = "Select * from tblrecord where DateTime between '" + dateTimePicker1.Value + "' and '" + dateTimePicker2.Value + "'";
cm = new MySqlCommand(sql);
//cm = new MySqlCommand(sql, cn1);
dr = cm.ExecuteReader();
dr.Read();
if (dr.HasRows)

Answer 1

只需在连接字符串中添加密码，因为您尚未在连接中添加密码。