c#的sql查询demo

一、今天写了个c#的sql查询，记录一下
二、代码如下：
private void dbService( string sql)
{
MySqlConnection sqlCon = new MySqlConnection("Database=caretop;Data Source=127.0.0.1;User Id=root;Password=asd123");
MySqlCommand cmd = new MySqlCommand(sql, sqlCon);
MySqlDataReader reader = null;
try
{
//打开连接
sqlCon.Open();
//执行查询，并将结果返回给读取器
reader = cmd.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
string rlt = "工号：" + reader[0].ToString() + "\t姓名：" + reader[1].ToString() + "\r\n";
this.rlt.Items.Add(rlt);
}
}else
{
MessageBox.Show("Error =" + "查无此人，请确认查询参数！");
}
}
catch (Exception ex) {
MessageBox.Show("Error =" + ex.Message.ToString());
}
finally
{
reader.Close();
sqlCon.Close();
}
}