增删改查
using System;
using System.IO;
using MySql.Data;
using System.Data;
using UnityEngine;
using System.Collections;
using MySql.Data.MySqlClient;
public class SqlAccess
{
public static MySqlConnection dbConnection;
//如果只是在本地的话，写localhost就可以。
// static string host = "localhost";
//如果是局域网，那么写上本机的局域网IP
static string host = "192.168.1.106";
static string id = "root";
static string pwd = "1234";
static string database = "xuanyusong";
public SqlAccess()
{
OpenSql();
}
public static void OpenSql()
{
try
{
string connectionString = string.Format("Server = {0};port={4};Database = {1}; User ID = {2}; Password = {3};", host, database, id, pwd, "3306");
dbConnection = new MySqlConnection(connectionString);
dbConnection.Open();
}
catch (Exception e)
{
throw new Exception("服务器连接失败，请重新检查是否打开MySql服务。" + e.Message.ToString());
}
}
public DataSet CreateTable(string name, string[] col, string[] colType)
{
if (col.Length != colType.Length)
{
throw new Exception("columns.Length != colType.Length");
}
string query = "CREATE TABLE " + name + " (" + col[0] + " " + colType[0];
for (int i = 1; i < col.Length; ++i)
{
query += ", " + col[i] + " " + colType[i];
}
query += ")";
return ExecuteQuery(query);
}
public DataSet CreateTableAutoID(string name, string[] col, string[] colType)
{
if (col.Length != colType.Length)
{
throw new Exception("columns.Length != colType.Length");
}
string query = "CREATE TABLE " + name + " (" + col[0] + " " + colType[0] + " NOT NULL AUTO_INCREMENT";
for (int i = 1; i < col.Length; ++i)
{
query += ", " + col[i] + " " + colType[i];
}
query += ", PRIMARY KEY (" + col[0] + ")" + ")";
Debug.Log(query);
return ExecuteQuery(query);
}
//插入一条数据，包括所有，不适用自动累加ID。
public DataSet InsertInto(string tableName, string[] values)
{
string query = "INSERT INTO " + tableName + " VALUES (" + "'" + values[0] + "'";
for (int i = 1; i < values.Length; ++i)
{
query += ", " + "'" + values[i] + "'";
}
query += ")";
Debug.Log(query);
return ExecuteQuery(query);
}
//插入部分ID
public DataSet InsertInto(string tableName, string[] col, string[] values)
{
if (col.Length != values.Length)
{
throw new Exception("columns.Length != colType.Length");
}
string query = "INSERT INTO " + tableName + " (" + col[0];
for (int i = 1; i < col.Length; ++i)
{
query += ", " + col[i];
}
query += ") VALUES (" + "'" + values[0] + "'";
for (int i = 1; i < values.Length; ++i)
{
query += ", " + "'" + values[i] + "'";
}
query += ")";
Debug.Log(query);
return ExecuteQuery(query);
}
public DataSet SelectWhere(string tableName, string[] items, string[] col, string[] operation, string[] values)
{
if (col.Length != operation.Length || operation.Length != values.Length)
{
throw new Exception("col.Length != operation.Length != values.Length");
}
string query = "SELECT " + items[0];
for (int i = 1; i < items.Length; ++i)
{
query += ", " + items[i];
}
query += " FROM " + tableName + " WHERE " + col[0] + operation[0] + "'" + values[0] + "' ";
for (int i = 1; i < col.Length; ++i)
{
query += " AND " + col[i] + operation[i] + "'" + values[0] + "' ";
}
return ExecuteQuery(query);
}
public DataSet 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)
{
query += ", " + cols[i] + " =" + colsvalues[i];
}
query += " WHERE " + selectkey + " = " + selectvalue + " ";
return ExecuteQuery(query);
}
public DataSet Delete(string tableName, string[] cols, string[] colsvalues)
{
string query = "DELETE FROM " + tableName + " WHERE " + cols[0] + " = " + colsvalues[0];
for (int i = 1; i < colsvalues.Length; ++i)
{
query += " or " + cols[i] + " = " + colsvalues[i];
}
Debug.Log(query);
return ExecuteQuery(query);
}
public void Close()
{
if (dbConnection != null)
{
dbConnection.Close();
dbConnection.Dispose();
dbConnection = null;
}
}
public static DataSet ExecuteQuery(string sqlString)
{
if (dbConnection.State == ConnectionState.Open)
{
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());
}
finally
{
}
return ds;
}
return null;
}
}
demo:
using System;
using System.IO;
using MySql.Data;
using System.Data;
using UnityEngine;
using System.Collections;
using MySql.Data.MySqlClient;
public class NewBehaviourScript : MonoBehaviour
{
string Error = null;
void Start()
{
try
{
SqlAccess sql = new SqlAccess();
sql.CreateTableAutoID("momo", new string[] {
"id", "name", "qq", "email", "blog" }, new string[] {
"int", "text", "text", "text", "text" });
//sql.CreateTable("momo",new string[]{"name","qq","email","blog"}, new string[]{"text","text","text","text"});
sql.InsertInto("momo", new string[] {
"name", "qq", "email", "blog" }, new string[] {
"xuanyusong", "289187120", "[email protected]", "xuanyusong.com" });
sql.InsertInto("momo", new string[] {
"name", "qq", "email", "blog" }, new string[] {
"ruoruo", "34546546", "[email protected]", "xuanyusong.com" });
DataSet ds = sql.SelectWhere("momo", new string[] {
"name", "qq" }, new string[] {
"id" }, new string[] {
"=" }, new string[] {
"1" });
if (ds != null)
{
DataTable table = ds.Tables[0];
foreach (DataRow row in table.Rows)
{
foreach (DataColumn column in table.Columns)
{
Debug.Log(row[column]);
}
}
}
sql.UpdateInto("momo", new string[] {
"name", "qq" }, new string[] {
"'ruoruo'", "'11111111'" }, "email", "'[email protected]'");
sql.Delete("momo", new string[] {
"id", "email" }, new string[] {
"1", "'[email protected]'" });
sql.Close();
}
catch (Exception e)
{
Error = e.Message;
}
}
// Update is called once per frame
void OnGUI()
{
if (Error != null)
{
GUILayout.Label(Error);
}
}
}
依赖dll文件：zxing.unity 是画二维码的，连数据库是不需要用的；
