Below is a behavior script I designed for handling data persistence in a simple manner. This could be greatly expanded and customized, but will work for simple game saving needs out of the box.
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Xml;
using System.IO;
public class DataManager : MonoBehaviour
{
private bool _IsLoaded;
private bool _IsNew;
private DataSet _DS;
private DataTable _TblSimpleProperty;
private DataColumn _ColSimplePropertyKey;
private string _XmlPath = Application.dataPath + @"/DataManager.xml";
private string _DSName = @"DataManagerData";
private string _TableName = @"SimpleProperty";
private string _KeyColName = @"Key";
private string _BoolValueColName = @"BoolValue";
private string _IntValueColName = @"IntValue";
private string _FloatValueColName = @"FloatValue";
private string _StringValueColName = @"StringValue";
public bool IsLoaded
{
get { return _IsLoaded; }
}
public bool IsNew
{
get { return _IsNew; }
}
public DataSet DS
{
get{ return _DS; }
}
void Awake()
{
DontDestroyOnLoad(this);
_IsLoaded = false;
_IsNew = false;
_DS = new DataSet(_DSName);
}
// Use this for initialization
void Start()
{
}
// Update is called once per frame
void Update()
{
if (!_IsLoaded)
{
// make sure data has been loaded by this time
Load();
}
}
void OnApplicationQuit()
{
if (_IsLoaded ( _DS.HasChanges() || _IsNew))
{
Save();
_DS.AcceptChanges();
Debug.Log("DataManager: Data Saved!");
}
}
private DataRow FindPropertyRow(string key)
{
DataRow retRow = null;
int propRowIdx = _TblSimpleProperty.DefaultView.Find(new object[] { key });
if (propRowIdx >= 0)
{
DataRowView propRow = _TblSimpleProperty.DefaultView[propRowIdx];
retRow = propRow.Row;
}
return retRow;
}
public bool Exists(string key)
{
return (FindPropertyRow(key) != null);
}
public SimpleProperty GetSimpleProperty(string key)
{
SimpleProperty retProp = null;
DataRow propRow = FindPropertyRow(key);
if(propRow != null)
{
retProp = new SimpleProperty(key);
retProp.BoolValue = (bool)propRow[_BoolValueColName];
retProp.IntValue = (int)propRow[_IntValueColName];
retProp.FloatValue = (float)propRow[_FloatValueColName];
retProp.StringValue = (string)propRow[_StringValueColName];
}
return retProp;
}
public List<SimpleProperty> GetSimpleProperties(List<string> keyList)
{
List<SimpleProperty> propList = new List<SimpleProperty>();
foreach (string key in keyList)
{
propList.Add(GetSimpleProperty(key));
}
return propList;
}
public void SetSimpleProperty(SimpleProperty prop)
{
DataRow propRow = FindPropertyRow(prop.Key);
if (propRow == null)
{
// not in the table so create a new row and add it
propRow = _TblSimpleProperty.NewRow();
propRow[_KeyColName] = prop.Key;
_TblSimpleProperty.Rows.Add(propRow);
}
// update the column values
propRow[_BoolValueColName] = prop.BoolValue;
propRow[_IntValueColName] = prop.IntValue;
propRow[_FloatValueColName] = prop.FloatValue;
propRow[_StringValueColName] = prop.StringValue;
}
public void DeleteSimpleProperty(string key)
{
DataRow propRow = FindPropertyRow(key);
propRow.Delete();
}
public SimpleProperty SetPropertyValue(string key, bool boolValue)
{
SimpleProperty prop = GetSimpleProperty(key);
prop.BoolValue = boolValue;
SetSimpleProperty(prop);
return prop;
}
public SimpleProperty SetPropertyValue(string key, int intValue)
{
SimpleProperty prop = GetSimpleProperty(key);
prop.IntValue = intValue;
SetSimpleProperty(prop);
return prop;
}
public SimpleProperty SetPropertyValue(string key, float floatValue)
{
SimpleProperty prop = GetSimpleProperty(key);
prop.FloatValue = floatValue;
SetSimpleProperty(prop);
return prop;
}
public SimpleProperty SetPropertyValue(string key, string stringValue)
{
SimpleProperty prop = GetSimpleProperty(key);
prop.StringValue = stringValue;
SetSimpleProperty(prop);
return prop;
}
public void Load()
{
FileInfo xmlFile = null;
StreamReader reader = null;
xmlFile = new FileInfo(_XmlPath);
if (xmlFile != null xmlFile.Exists)
{
// load the dataset if the file is there
_IsNew = false;
reader = xmlFile.OpenText();
_DS.ReadXml(reader,XmlReadMode.ReadSchema);
_TblSimpleProperty = _DS.Tables[_TableName];
_ColSimplePropertyKey = _TblSimpleProperty.Columns[_KeyColName];
_TblSimpleProperty.DefaultView.Sort = _KeyColName;
_DS.AcceptChanges();
Debug.Log("DataManager: Data Loaded!");
}
else
{
_IsNew = true;
Debug.Log("DataManager: " + _XmlPath + " does not exist, initializing data.");
InitializeSchema();
}
_IsLoaded = true;
}
public void Save()
{
_DS.WriteXml(_XmlPath, XmlWriteMode.WriteSchema);
}
void InitializeSchema()
{
//Create the default data table for storing our simple properties
_TblSimpleProperty = new DataTable(_TableName);
_ColSimplePropertyKey = new DataColumn(_KeyColName, typeof(string));
_ColSimplePropertyKey.AllowDBNull = false;
_TblSimpleProperty.Columns.Add(_ColSimplePropertyKey);
_TblSimpleProperty.PrimaryKey = new DataColumn[] { _ColSimplePropertyKey };
_TblSimpleProperty.Columns.Add(new DataColumn(_BoolValueColName, typeof(bool)));
_TblSimpleProperty.Columns.Add(new DataColumn(_IntValueColName, typeof(int)));
_TblSimpleProperty.Columns.Add(new DataColumn(_FloatValueColName, typeof(float)));
_TblSimpleProperty.Columns.Add(new DataColumn(_StringValueColName, typeof(string)));
_TblSimpleProperty.DefaultView.Sort = _KeyColName;
_DS.Tables.Add(_TblSimpleProperty);
Debug.Log("DataManager: Schema Initialized.");
}
// This embedded class is the object for the simple property objects
// stored in the SimpleProperty data table.
public class SimpleProperty
{
public string Key;
public bool BoolValue;
public int IntValue;
public float FloatValue;
public string StringValue;
public SimpleProperty(string key)
{
Key = key;
BoolValue = false;
IntValue = 0;
FloatValue = 0f;
StringValue = null;
}
public SimpleProperty(string key, bool boolValue, int intValue, float floatValue, string stringValue) : this(key)
{
BoolValue = boolValue;
IntValue = intValue;
FloatValue = floatValue;
StringValue = stringValue;
}
public SimpleProperty(string key, bool boolValue)
: this(key)
{
BoolValue = boolValue;
}
public SimpleProperty(string key, int intValue)
: this(key)
{
IntValue = intValue;
}
public SimpleProperty(string key, float floatValue)
: this(key)
{
FloatValue = floatValue;
}
public SimpleProperty(string key, string stringValue)
: this(key)
{
StringValue = stringValue;
}
}
}
264580–9520–$datamanager_109.cs (8.05 KB)
