/*
在Unity3d中连接数据库常用脚本

1.C#代码：
*/
using UnityEngine;
using System;
using System.Collections;
using System.Data;
using MySql.Data.MySqlClient;
public class CMySql : MonoBehaviour {
// Global variables
public static MySqlConnection dbConnection;//Just like MyConn.conn in StoryTools before
static string host = "192.168.1.100";
static string id = "mysql";//这里是你自己的数据库的用户名字，我一开始想用root，发现不行，后来添加了新的用户才可以
static string pwd = "123456";
static string database = "test";
static string result = "";

private string strCommand = "Select * from Unity3d_test ORDER BY id;";
public static DataSet MyObj;
void OnGUI()
{
host = GUILayout.TextField( host, 200, GUILayout.Width(200));
id = GUILayout.TextField( id, 200, GUILayout.Width(200));
pwd = GUILayout.TextField( pwd, 200, GUILayout.Width(200));
if(GUILayout.Button("Test"))
{
string connectionString = string.Format("Server = {0}; Database = {1}; User ID = {2}; Password = {3};",host,database,id,pwd);
openSqlConnection(connectionString);

MyObj = GetDataSet(strCommand);
}
GUILayout.Label(result);
}
// On quit
public static void OnApplicationQuit() {
closeSqlConnection();
}

// Connect to database
private static void openSqlConnection(string connectionString) {
dbConnection = new MySqlConnection(connectionString);
dbConnection.Open();
result = dbConnection.ServerVersion;
//Debug.Log("Connected to database."+result);
}

// Disconnect from database
private static void closeSqlConnection() {
dbConnection.Close();
dbConnection = null;
//Debug.Log("Disconnected from database."+result);
}

// MySQL Query
public static void doQuery(string sqlQuery) {
IDbCommand dbCommand = dbConnection.CreateCommand();
dbCommand.CommandText = sqlQuery;
IDataReader reader = dbCommand.ExecuteReader();
reader.Close();
reader = null;
dbCommand.Dispose();
dbCommand = null;
}
#region Get DataSet
public DataSet GetDataSet(string sqlString)
{
//string sql = UnicodeAndANSI.UnicodeAndANSI.UnicodeToUtf8(sqlString);


DataSet ds = new DataSet();
try
{
MySqlDataAdapter da = new MySqlDataAdapter(sqlString, dbConnection);
da.Fill(ds);

}
catch (Exception ee)
{

throw new Exception("SQL:" + sqlString + "n" + ee.Message.ToString());
}
return ds;

}
#endregion
}

using UnityEngine;
using System;
using System.Collections;
using System.Data;
public class DataBaseTest : MonoBehaviour {
public GUISkin myGUISkin = new GUISkin();
string strID = "";
string strName = "";
string strSex = "";
int Index = 1;
// Use this for initialization
void Start () {
}
void OnGUI()
{
GUI.skin = myGUISkin;
if (GUI.Button(new Rect(100,320,100,100),"Click Me"))
{
foreach(DataRow dr in CMySql.MyObj.Tables[0].Rows)
{
if (Index.ToString() == dr["ID"].ToString())
{
strID = dr["ID"].ToString();
strName = dr["Name"].ToString();
strSex = dr["Sex"].ToString();

break;
}
}
Index++;
if(Index > 5)
{
Index = 1;
}

}
GUI.Label(new Rect(320,100,150,70),"DataBaseTest");
GUI.Label(new Rect(300,210,150,70),strID);
GUI.Label(new Rect(300,320,150,70),strName);
GUI.Label(new Rect(300,430,150,70),strSex);

}
}

2.導入dll
同先前的帖子 , 將MySql.data.dll Import至Assets底下 , 然後再到UnityEditorDataFrameworksMono.framework 中
將System.Data.dll 也一起Import至Assets內 , 當然 , 如果想顯示中文的話 , 請參考中文視頻教學 , 建立一個GUISkin與字型

3.建立數據庫內容
主要是因為代碼中的這段內容
static string host = "192.168.1.100";
static string id = "mysql";
static string pwd = "123456";
static string database = "test";
private string strCommand = "Select * from Unity3d_test ORDER BY id;";
其中host ,id , pwd 請自行設定 , 簡單的說就是連進你的MySQL啦~
然後建立一個名為test的Database , 在這個test下建立一張table , 取名為 Unity3d_test ,
接下來就為這張Unity3d_test建立3個欄位 : ID , Name , Sex (記得將ID設定為primary key 且默認值為1)
再來自行填入5筆資料(5筆資料的原因是腳本那邊是設定成5筆資料一個循環 , 使用者可以自行更改腳本試試)

4.建立GameObject
建立完GameObject後將上面兩個腳本掛上去 , 如果有建立GUISkin , 記得指定GUISkin

5.執行
執行後先按Test按鈕來連接數據庫 , 然後再按"Click Me"來顯示數據庫內的內容