ExcelDatalProcessor.cs

using System.IO;
using Excel;
using UnityEditor;
using UnityEngine;

public class ExcelDatalProcessor : AssetPostprocessor
{
  
	//出力先.
	private static readonly string exportPath = "Assets/Terasurware/App Data xlsx.asset";
	
	// 入力元.
	private static readonly string filePath = "Assets/Terasurware/app data.xls";

	// ①．Excelファイルインポート時に反応する.

	static void OnPostprocessAllAssets (
					string[] importedAssets, 
					string[] deletedAssets, 
					string[] movedAssets, 
					string[] movedFromAssetPaths)
	{
		foreach (string asset in importedAssets) {
			
			if (!filePath.Equals (asset))
				continue;
			
			// ②．データの形状に対応するScriptableObjectを生成する。既存の物があれば使用;

			FileData data = (FileData)AssetDatabase.LoadAssetAtPath (exportPath, typeof(FileData));

			if (data == null) {
				data = ScriptableObject.CreateInstance<FileData> ();
				AssetDatabase.CreateAsset ((ScriptableObject)data, exportPath);
			}
			
			// ③．Excelを解析し、２で取得したScriptableObjectに流しこむ.
			
			data.dataList.Clear ();
			
			using (FileStream stream = File.Open (filePath, FileMode.Open, FileAccess.Read)) {
				
				IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader (stream);
				excelReader.NextResult ();
				
				excelReader.Read ();
				
				while (excelReader.Read()) {
					
					Debug.Log (excelReader.GetString (0));
					
					FileData.Data d = new FileData.Data ();
					d.version = excelReader.GetInt32 (1);
					d.url = excelReader.GetString (2);
					
					data.dataList.Add (d);
				}
			
				excelReader.Close ();
			}
			
			// ④．変更を確定する.

			ScriptableObject obj = AssetDatabase.LoadAssetAtPath (exportPath, typeof(ScriptableObject)) as ScriptableObject;
			obj.hideFlags = HideFlags.NotEditable;
			EditorUtility.SetDirty (obj);
		}
	}
}

FileData.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class FileData : ScriptableObject
{
  
	public List<Data> dataList;
	
	[System.Serializable]
	public class Data
	{
		public string url;
		public int version;
	}	
}

thx share the good tips.