Save and Load Game in C#

Archived Forums Questions & Answers
1

I have a save and load script like this:

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Text;
using System.IO;

public class GameManager : MonoBehaviour {
	
	private List<GameObject> Players = new List<GameObject>();
	private string path;
	public string mapName;
	public Camera myCam;
	private GameObject previousPlayer;
	
	void Start () {
		GameObject[] allPlayers = new GameObject[GameObject.FindGameObjectsWithTag("Player").Length];
		allPlayers = GameObject.FindGameObjectsWithTag("Player");
		for(int i = 0; i < allPlayers.Length; i++)
		{
			//getting all players that needs to be stored in xml
			Players.Add(allPlayers*);*

  •  }*

  • }*

  • void Update () {*

  •  if(Input.GetMouseButtonDown(0))*

  •  {*

  •  	Ray ray = myCam.ScreenPointToRay (Input.mousePosition);*

  •  	RaycastHit hit;*

  •  	if (Physics.Raycast (ray, out hit, Mathf.Infinity)) {*

  •  		if(hit.collider.tag == "Player")*

  •  		{*

  •  			Player playerScript = hit.collider.gameObject.GetComponent<Player>();*

  •  			playerScript.canControl = true;*

  •  			if(previousPlayer == null)*

  •  			{*

  •  				previousPlayer = hit.collider.gameObject;*

  •  			}*

  •  			else if(previousPlayer.transform != hit.collider.transform)*

  •  			{*

  •  				Player previousPlayerScript = previousPlayer.GetComponent<Player>();*

  •  				previousPlayerScript.canControl = false;*

  •  				previousPlayer = hit.collider.gameObject;*

  •  			}*

  •  		}*

  •  	}*

  •  }*

  • }*

  • void OnGUI()*

  • {*

  •  if(GUI.Button(new Rect(0,0,100,50),"Save"))*

  •  {*

  •  	Save();*

  •  }*

  •  if(GUI.Button(new Rect(110,0,100,50),"Load"))*

  •  {*

  •  	Load();*

  •  }*

  • }*

  • void Load()*

  • {*

  •  path = Application.dataPath + "/XmlDocs/"+mapName+".xml";*

  •  XmlReader reader = XmlReader.Create(path);*

  •  XmlDocument xmlDoc = new XmlDocument();*

  •  xmlDoc.Load(reader);*

  • 	XmlNodeList Data = xmlDoc.GetElementsByTagName("Data");*

  •  for(int i = 0; i < Data.Count;i++)*

  •  {*

  •  	// getting data*

  •  	XmlNode DataChilds = Data.Item(i);* 

  •  	// getting all gameObjects stored inside data*

  •  	XmlNodeList allGameObjects = DataChilds.ChildNodes;*

  •  	for(int j = 0; j < allGameObjects.Count ; j++)*

  •  	{*

  •  		XmlNode game_Objects = allGameObjects.Item(j);*

  •  		//Finding the player, if he is present than loading its position and rotation*

  •  		GameObject player = GameObject.Find(game_Objects.Name);*

  •  		if(player)*

  •  		{*

  •  			XmlNodeList GameObjects_Position_Rotation = game_Objects.ChildNodes;*

  •  			//First element have the position stored inside it* 

  •  			XmlNode GameObjects_Position = GameObjects_Position_Rotation.Item(0);*

  •  			string[] split_position = GameObjects_Position.InnerText.Split(',');*

  •  			player.transform.position = new Vector3(float.Parse(split_position[0]),float.Parse(split_position[1]),float.Parse(split_position[2]));*

  •  			//Second element have the rotation stored inside it* 

  •  			XmlNode GameObjects_Rotation = GameObjects_Position_Rotation.Item(1);*

  •  			string[] split_rotation = GameObjects_Rotation.InnerText.Split(',');*

  •  			player.transform.rotation = new Quaternion(float.Parse(split_rotation[0]),float.Parse(split_rotation[1]),float.Parse(split_rotation[2]),float.Parse(split_rotation[3]));*

  •  		}*

  •  	}*

  •  }*

  •  reader.Close();*

}

  • void Save(){*

  •  path = Application.dataPath + "/XmlDocs/"+mapName+".xml";*

  •  XmlDocument xmlDoc = new XmlDocument();*

  •  XmlElement elmRoot = xmlDoc.CreateElement("Data");*

  • xmlDoc.AppendChild(elmRoot);*

  •  for(int i = 0; i < Players.Count; i++)*

  • {*

  •  	//Creating an xml element with player name*

XmlElement Player_Object = xmlDoc.CreateElement(Players*.name);
_ //Creating an xml element for saving player position*_
* XmlElement Player_Position = xmlDoc.CreateElement(“Position”);
_ //Combining player position x,y and z value into a single string separeted by commas*_
Player_Position.InnerText = Players.transform.position.x+“,”+Players_.transform.position.y+“,”+Players*.transform.position.z;
//Creating an xml element for saving player rotation*
* XmlElement Player_Rotation = xmlDoc.CreateElement(“Rotation”);*
* //Combining player rotation x,y,z and w value into a single string separeted by commas*
Player_Rotation.InnerText = Players.transform.rotation.x+“,”+Players.transform.rotation.y+“,”+Players.transform.rotation.z+“,”+Players*.transform.rotation.w;_
Player_Object.AppendChild(Player_Position);
Player_Object.AppendChild(Player_Rotation);
elmRoot.AppendChild(Player_Object);
_ }*_

* StreamWriter outStream = System.IO.File.CreateText(path);*

* xmlDoc.Save(outStream);*
* outStream.Close();*
* }*
}

The script above is just can save and load a current game, so if I want to save and load the game in different name I have to change the game name manually.
How can I save and load many games in different name automatically?
Please help me :slight_smile:

1 Answer

1
2

Add a parameter for the save name/number to both the load() and save() routines. e.g.

void Load(int saveFileNumber)
{...

Then, in both of your Load() and Save() routines add that name or number to the file name. Using my above example, some thing like this:

path = Application.dataPath + "/XmlDocs/"+mapName+ saveFileNumber +".xml";