trouble saving/loading Texture

Unity Engine
1

hey I have an itemSystem editor extension where i convert a texture2D retrieved with AssetPreview.GetAssetPreview to a png with EncodeToPNG() and then File.WriteAllBytes(…). strange thing is that the png is in my windows folder, but it doesn’t seem to updated my asset folder automatically to appear in unty? it is only there after I opened the windows folder or refresh?
so i added an AssetDataBase.Refresh(); to the code but still can’t get it to load as item.Icon in my instance that also gets created as an asset…

if this makes any sense

here’s my code:

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.IO;

public class ItemSystem : EditorWindow 
{
	 [MenuItem ("MyGame/Add ItemSystem")]
	static void Init ()
	{
		EditorWindow.GetWindow<ItemSystem>();		
	}
	
	public enum ItemType 
	{
		item
	}
	
	public ItemType typeToCreate = ItemType.item;
	public string itemName;
	public int itemValue;
	public string description;
	public GameObject itemObj;
	public Texture2D icon;
	public int amount;
	
	int index;
	ItemManager itemManager;
	
	void OnEnable()
	{
		GameObject go=GameObject.Find("ItemManager");
		if(go==null)
		{
			Debug.Log("ceating IM");
			go=new GameObject();
			go.AddComponent<ItemManager>();
			go.name="ItemManager";
		}
		itemManager=go.GetComponent<ItemManager>()as ItemManager;		
	}
	void OnGUI()
	{
		itemName = EditorGUILayout.TextField("Name : ", itemName);
		itemValue = EditorGUILayout.IntField("Value : ", itemValue);
		description = EditorGUILayout.TextField("Description : ", description);
		amount = EditorGUILayout.IntField("Amount : ", amount);
		itemObj = EditorGUILayout.ObjectField(itemObj,typeof(GameObject),true)as GameObject;
		if(itemObj!=null)icon = EditorGUILayout.ObjectField(AssetPreview.GetAssetPreview(itemObj), typeof(Texture2D),true,  GUILayout.MaxWidth(50),  GUILayout.MaxHeight(50))as Texture2D;
		typeToCreate= (ItemType)EditorGUILayout.EnumPopup(typeToCreate);

		if(itemName != null  itemObj != null)
		{
			switch(typeToCreate)
			{
				case ItemType.item:
					if(GUILayout.Button("Create Item", GUILayout.Width(150)))
					{
						Item item = ScriptableObject.CreateInstance<Item>();
						item.ItemName = itemName;
						item.ItemValue = itemValue;
						item.Description = description;
						item.ItemObj = itemObj;
						item.Amount = amount;
						itemManager.itemList.Add(item);
						index = itemManager.itemList.IndexOf(item );
						item.ID = index;
						byte[] bytes=icon.EncodeToPNG();
						File.WriteAllBytes(Application.dataPath + "/Icons/"+index+"_"+item.ItemName+"_icon.png", bytes);
						AssetDatabase.Refresh();
						item.Icon= AssetDatabase.LoadAssetAtPath(Application.dataPath +"/Icons/"+index+"_"+item.ItemName+"_icon.png", typeof(Texture2D))as Texture2D;
						//icon = AssetDatabase.LoadAssetAtPath(Application.dataPath +"/Icons/"+index+"_"+item.ItemName+"_icon.png", typeof(Texture2D))as Texture2D;
						//item.Icon=icon;
						AssetDatabase.CreateAsset(item, "Assets/Items/"+item.ID+"_"+item.ItemName+"_item.prefab");
						Create(index);
					}
				break;
			}
		}
	}
	void Create(int index)
	{
		GameObject clone = Instantiate(itemObj, new Vector3(Camera.main.transform.position.x, 0, Camera.main.transform.localPosition.z+2), itemObj.transform.rotation)as GameObject;
		clone.name = itemName;
		EditorUtility.SetDirty(itemManager);
	}
}
2

with this it seems to work…

icon= Resources.Load("Icons/"+index+"_"+item.ItemName+"_icon")as Texture2D;
item.Icon=icon;

one more thing i don’t want to save duplicate icons… any ideas how i can check before doing this

byte[] bytes=icon.EncodeToPNG();

File.WriteAllBytes(Application.dataPath + "/Icons/"+index+"_"+item.ItemName+"_icon.png", bytes);

tried something like:

foreach(Item i in itemManager.itemList)
{
	if(item.ItemObj != i.ItemObj)
	{
		byte[] bytes=icon.EncodeToPNG();
		File.WriteAllBytes(Application.dataPath + "/Resources/Icons/"+index+"_"+item.ItemName+"_icon.png", bytes);
		AssetDatabase.Refresh();
	}
}

but that doesn’t cut it…

3

solved it like this

//to prevent making duplicate icons we check if this item.ItemObj is unique
					for(int i=0; i<itemManager.itemList.Count; i++)
					{
					    if(item.ItemObj == itemManager.itemList[i].ItemObj)
					    {
							unique=false;
					    }						
					}
					//add the item to the itemManager, we do this after we check the unique state for the icon otherwise it would always be false
					itemManager.itemList.Add(item);
					index = itemManager.itemList.IndexOf(item );
					item.ID = index;
					//if unique create a new icon
					if(unique)
					{
						byte[] bytes=icon.EncodeToPNG();
						File.WriteAllBytes(Application.dataPath + "/Resources/Icons/"+item.ItemObj.name+"_icon.png", bytes);
						AssetDatabase.Refresh();
					}
					//set the items icon
					item.Icon=Resources.Load("Icons/"+item.ItemObj.name+"_icon")as Texture2D;;
					AssetDatabase.CreateAsset(item, "Assets/Items/"+item.ID+"_"+item.ItemName+"_item.prefab");
					//create the acctual gameObject by index
					Create(index);