原文链接：http://www.unitymanual.com/bbs/thread-198-1-1.html
最近几天在讨论游戏本地数据存储方式，考虑到跨平台性。最开始打算用xml，但是考虑到xml文件多而杂，而且后期游戏更新。也不是很方便，于是提出了采用sqlite，可是没想到的是原本信心满满的我却遭到了闭门羹，呵呵....
原来，不是用 以前做c#winform应用那套dll， unity 3d有自己对应的sqlite.dll分别需要三个文件1.Mono.Data.sqlite.dll
在unity安装文件“Unity\Editor\Data\MonoBleedingEdge\lib\mono”可以找到，注意mono文件夹下面 有对应版本号，可以根据自己的项目来决定选择。
2.System.Data.dll 同上位置一样可以找到 ，不过建议使用2.0版本
3.sqlite3.dll 就在\Unity\Editor下可以找到
除此之外，还需要把这3个文件放在你的项目的这个路径下面：\Assets\Plugins\，没有Plugins文件夹就必须创建这个文件夹，然后将这三个dll文件放在该文件夹下面。当然，如果你想能够在PC上面发布成可执行文件，还需要改动一些地方。在 unity3d 中的Play Setting ->Other Setting 中将Api Compatibility的等级改为.NET 2.0;那么这些操作做完了以后，如果你的代码写得没有 问题 ，那么你就可以成功了。
好啦 ，前面准工作完成 下面就直接看测试代码吧
首先是一个 sqlite的数据库操作类，该类是我改编的 网上也有很多，不过好像是js编写，于是自己动手改编成了c#希望能对大家有用，呵呵...
好了，上类sqliteDbHelper：
using UnityEngine; using System.Collections; using Mono.Data.sqlite;<span style="font-family: 'microsoft yahei';">//导入sqlite数据集，也就是Plugins文件夹下的那个dll文件</span> using System;<span style="font-family: 'microsoft yahei';">//数据集 是formwork2.0 用vs开发要自己引用框架中的System.Data</span> using System.Data;
public class sqliteDbHelper { /// <summary> /// 声明一个连接对象 /// </summary> private sqliteConnection dbConnection; /// <summary> /// 声明一个操作数据库命令 /// </summary> private sqliteCommand dbCommand; /// <summary> /// 声明一个读取结果集的一个或多个结果流 /// </summary> private sqliteDataReader reader; /// <summary> /// 数据库的连接字符串，用于建立与特定数据源的连接 /// </summary> /// <param name="connectionString">数据库的连接字符串，用于建立与特定数据源的连接</param> public sqliteDbHelper (string connectionString) { <span style="white-space:pre"> </span>OpenDB(connectionString); Debug.Log(connectionString); } public void OpenDB (string connectionString) { try { dbConnection = new sqliteConnection (connectionString); dbConnection.Open(); Debug.Log ("Connected to db"); } catch(Exception e) { string temp1 = e.ToString(); Debug.Log(temp1); } } /// <summary> /// 关闭连接 /// </summary> public void ClosesqlConnection () { if (dbCommand != null) { <span style="white-space:pre"> </span>dbCommand.Dispose(); } dbCommand = null; if (reader != null) { reader.Dispose (); } reader = null; if (dbConnection != null) { dbConnection.Close (); } dbConnection = null; Debug.Log ("Disconnected from db."); } /// <summary> /// 执行查询sqlite语句操作 /// </summary> /// <param name="sqlQuery"></param> /// <returns></returns> public sqliteDataReader ExecuteQuery (string sqlQuery) { dbCommand = dbConnection.CreateCommand (); dbCommand.CommandText = sqlQuery; reader = dbCommand.ExecuteReader (); return reader; } /// <summary> /// 查询该表所有数据 /// </summary> /// <param name="tableName">表名</param> /// <returns></returns> public sqliteDataReader ReadFullTable (string tableName) { string query = "SELECT * FROM " + tableName; return ExecuteQuery (query); } /// <summary> /// 动态添加表字段到指定表 /// </summary> /// <param name="tableName">表名</param> /// <param name="values">字段集合</param> /// <returns></returns> public sqliteDataReader InsertInto (string tableName,string[] values) { string query = "INSERT INTO " + tableName + " VALUES (" + values[0]; for (int i = 1; i < values.Length; ++i) { query += "," + values; } query += ")"; return ExecuteQuery (query); } /// <summary> /// 动态更新表结构 /// </summary> /// <param name="tableName">表名</param> /// <param name="cols">字段集</param> /// <param name="colsvalues">对于集合值</param> /// <param name="selectkey">要查询的字段</param> /// <param name="selectvalue">要查询的字段值</param> /// <returns></returns> public sqliteDataReader UpdateInto (string tableName,string []cols,string []colsvalues,string selectkey,string selectvalue) { string query = "UPDATE "+tableName+" SET "+cols[0]+" = "+colsvalues[0]; for (int i = 1; i < colsvalues.Length; ++i)
<span style="white-space:pre"> </span> {
query += "," +cols+" ="+ colsvalues;
}
query += " WHERE "+selectkey+" = "+selectvalue+" ";
return ExecuteQuery (query);
}
/// <summary>
/// 动态删除指定表字段数据
/// </summary>
/// <param name="tableName">表名</param>
/// <param name="cols">字段</param>
/// <param name="colsvalues">字段值</param>
/// <returns></returns>
public sqliteDataReader Delete(string tableName,string []colsvalues)
{
string query = "DELETE FROM "+tableName + " WHERE " +cols[0] +" = " + colsvalues[0];
for (int i = 1; i < colsvalues.Length; ++i)
{
query += " or " +cols+" = "+ colsvalues;
}
Debug.Log(query);
return ExecuteQuery (query);
}
/// <summary>
/// 动态添加数据到指定表
/// </summary>
/// <param name="tableName">表名</param>
/// <param name="cols">字段</param>
/// <param name="values">值</param>
/// <returns></returns>
public sqliteDataReader InsertIntoSpecific (string tableName,string[] cols,string[] values)
{
if (cols.Length != values.Length)
{
throw new sqliteException ("columns.Length != values.Length");
}
string query = "INSERT INTO " + tableName + "(" + cols[0];
for (int i = 1; i < cols.Length; ++i)
{
query += "," + cols;
}
query += ") VALUES (" + values[0];
for (int i = 1; i < values.Length; ++i)
{
query += "," + values;
}
query += ")";
return ExecuteQuery (query);
}
/// <summary>
/// 动态删除表
/// </summary>
/// <param name="tableName">表名</param>
/// <returns></returns>
public sqliteDataReader DeleteContents (string tableName)
{
string query = "DELETE FROM " + tableName;
return ExecuteQuery (query);
}
/// <summary>
/// 动态创建表
/// </summary>
/// <param name="name">表名</param>
/// <param name="col">字段</param>
/// <param name="colType">类型</param>
/// <returns></returns>
public sqliteDataReader CreateTable (string name,string[] col,string[] colType)
{
if (col.Length != colType.Length)
{
throw new sqliteException ("columns.Length != colType.Length");
}
string query = "CREATE TABLE " + name + " (" + col[0] + " " + colType[0];
for (int i = 1; i < col.Length; ++i)
{
query += "," + col + " " + colType;
}
query += ")";
Debug.Log(query);
return ExecuteQuery (query);
}
/// <summary>
/// 根据查询条件 动态查询数据信息
/// </summary>
/// <param name="tableName">表</param>
/// <param name="items">查询数据集合</param>
/// <param name="col">字段</param>
/// <param name="operation">操作</param>
/// <param name="values">值</param>
/// <returns></returns>
public sqliteDataReader SelectWhere (string tableName,string[] items,string[] operation,string[] values)
{
if (col.Length != operation.Length || operation.Length != values.Length)
{
throw new sqliteException ("col.Length != operation.Length != values.Length");
}
string query = "SELECT " + items[0];
for (int i = 1; i < items.Length; ++i)
{
query += "," + items;
}
query += " FROM " + tableName + " WHERE " + col[0] + operation[0] + "'" + values[0] + "' ";
for (int i = 1; i < col.Length; ++i)
{
query += " AND " + col + operation + "'" + values[0] + "' ";
}
return ExecuteQuery (query);
}
}
好了 sqlite数据操作类写好后：本来应该按照编码规范来写因为我本身以前做c#的所有一般使用三层架构
Modle实例化对象类 ，DAl数据处理类，IDal数据接口类，Bll业务逻辑类
但是呢，目前只为测试 因此我就不一一详细介绍代码内容了，相信会c#的人都会三层架构，呵呵
ok，言归正传，下面将贴出unity3d 使用上面 sqliteDbHelper 操作类
sqliteDbTest：
using UnityEngine; using System.Collections; using System; using Mono.Data.sqlite; using System.Data;
public class sqliteDbTest : MonoBehavIoUr { <span style="white-space:pre"> </span>sqliteDbHelper db ; <span style="white-space:pre"> </span>int id=1; void Start () { db = new sqliteDbHelper("Data Source=./sqlite.db"); Debug.Log(db.ToString()); /* sqliteDbAccess db = new sqliteDbAccess("data source=mydb1.db"); db.CreateTable("momo",new string[]{"name","qq","email","blog"},new string[]{"text","text","text"}); db.ClosesqlConnection(); */ }
<span style="white-space:pre"> </span>public string name = "";
public string emls = "";
void OnGUI()
{
if(GUILayout.Button("create table"))
{
db.CreateTable("mytable",new string[]{"id","name","email"},new string[]{"int","varchar(20)","varchar(50)"});
Debug.Log("create table ok");
}
if(GUILayout.Button("insert data"))
{
db.InsertInto("mytable",new string[] { "" + (++id),"'随风去旅行"+id+"'","'zhangj_live"+id+"@163.com'"});//),"'aaa"+id+"'","'aaa"+id+"@sohu.com'"});
Debug.Log("insert table ok");
}
if(GUILayout.Button("search database"))
{
IDataReader sqReader = db.SelectWhere("mytable",new string[]
{"name",new string[]{"id"},new string[]{"="},new string[]{"2"});
while (sqReader.Read())
{
//Debug.Log(
name= "name="+sqReader.GetString(sqReader.GetOrdinal("name"));// +
emls = "email=" + sqReader.GetString(sqReader.GetOrdinal("email"));
//);
}
}
if (name != "")
{
GUI.Label(new Rect(100,100,100),name);
GUI.Label(new Rect(100,200,emls);
// GUILayout.Label(emls);
}
if(GUILayout.Button("close database"))
{
db.ClosesqlConnection();
Debug.Log("close table ok");
}
}
}
上面的代码很简单 ，相信稍微懂点unity3d的，都能看懂 因此就小偷懒一般 没写注释了，呵呵
原文链接：https://www.f2er.com/sqlite/199231.html
