【C# MySQL】第一次使用C#對MySQL進行操作的心得

花了2個多小時，終于成功的使用C#完成對MySQL的操作，查詢、修改和删除，不知道是該高興呢，還是悲傷呢（竟然花了2個小時），總之還是有必要寫下一點經驗，防止以後再走同樣的彎路：

1. SQL語句的格式非常重要，比如Table名應使用`Table`符号，不是普通的單引号，如果不清楚如何敲出，建議使用MySQL圖形化工具（如phpMyAdmin）自動生成，然後拷貝，eg: string sql = "SELECT * FROM `365232` WHERE `PICS ID` LIKE 'A.4.1-1/1'";  "INSERT INTO `picsdic`.`365232` (`PICS ID` ,`PICS Description` ,`Ref.` ,`Release` ,`Mnemonic` ,`Comments`)VALUES ('A.1/2', 'test', 'test', 'test', 'test', 'test');" string sqlDelete = "DELETE FROM `picsdic`.`365232` WHERE `365232`.`PICS ID` = 'A.1/3'";
2. 不用盲目在internet上導出搜尋，先認真看下官方的文檔，很多時候internet上都是翻譯官方文檔，而且不是很全面
3. MSDN和ConnectorNET.chm幫了不少忙，至少比Internet上的資料靠譜多了

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using MySql.Data.MySqlClient;

namespace MySQLConnection
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

                string connStr = "server=127.1.1.1;user=root;database=PICSDic;port=3306;password=HONGXING;";
                MySqlConnection conn = new MySqlConnection(connStr);
                try
                {
                    //Console.WriteLine("Connecting to MySQL...");
                    Label1.Text = "Connecting to MySQL...";
                    conn.Open();
                    // Perform database operations
                    //Query
                    string sql = "SELECT * FROM `365232` WHERE `PICS ID` LIKE 'A.4.1-1/1'";
                    MySqlCommand cmd = new MySqlCommand(sql, conn);
                    MySqlDataReader rdr = cmd.ExecuteReader();

                    while (rdr.Read())
                    {
                        txt1.Text = rdr[0] + " -- " + rdr[1];
                    }
                    rdr.Close();
                    //Insert
                    string sqlInsert = "INSERT INTO `picsdic`.`365232` (`PICS ID` ,`PICS Description` ,`Ref.` ,`Release` ,`Mnemonic` ,`Comments`)VALUES ('A.1/3', 'test', 'test', 'test', 'test', 'test');";
                    MySqlCommand cmdInsert = new MySqlCommand(sqlInsert, conn);
                    cmdInsert.ExecuteNonQuery();
                    //Delete
                    //string sqlDelete = "DELETE FROM `picsdic`.`365232` WHERE `365232`.`PICS ID` = 'A.1/2' AND `365232`.`PICS Description` = 'test' AND `365232`.`Ref.` = 'test' AND `365232`.`Release` = 'test' AND `365232`.`Mnemonic` = 'test' AND `365232`.`Comments` = 'test' LIMIT 1";
                    string sqlDelete = "DELETE FROM `picsdic`.`365232` WHERE `365232`.`PICS ID` = 'A.1/3'";
                    MySqlCommand cmdDelete = new MySqlCommand(sqlDelete, conn);
                    cmdDelete.ExecuteNonQuery();
                }