The first is the Plugins folder,
and then write two classes to call mysql. The premise is that the computer must be connected to call mysql. If not, how can Baidu download mysql and the like.
Then the most important ones are the SqlAccess class and NewBehaviourScript
```csharp
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using UnityEngine;
public class NewBehaviourScript : MonoBehaviour
{
// Start is called before the first frame update
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);
}
}
}
```csharp
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using MySql.Data.MySqlClient;
using System;
using System.Data;
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 = "192.168.0.2";
static string id = "root";
static string pwd = "1234";
static string database = "game";
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;
}
}
That's about it, after all, blogging is to record what I've learned