通用类 对象Excel互转

 public class ExcelHelper
     {

         public void Demo(string filePath)
         {
             if (File.Exists(filePath)) File.Delete(filePath);
          var   RootElement = new XLWorkbook();
             var   workSheet = RootElement.AddWorksheet("Demo");
             RootElement.SaveAs(filePath);
         }
         public void CreatNewFile(string filePath,string workSheetName)
         {
             if (File.Exists(filePath)) File.Delete(filePath);
             var RootElement = new XLWorkbook();
             var workSheet = RootElement.AddWorksheet(workSheetName);
             RootElement.SaveAs(filePath);
         }

         public List<T> ReadeExcel<T>(string filePath) where T:new()
         {
             if (!File.Exists(filePath)) throw new Exception("目标文件不存在");
             bool result = true;
             int index = ;
             string Identity = "";
             XLWorkbook RootElement = new XLWorkbook(filePath);
             List<T> list = new List<T>();
             IXLWorksheet workSheet = RootElement.Worksheet();
             Dictionary<int, string> keys = new Dictionary<int, string>();
             while (result)
             {
                 Identity = (workSheet.Cell(, index).Value + "").Trim();
                 if (string.IsNullOrEmpty(Identity))result = false;
                 else keys.Add(index, Identity);index++;
             }
             result = true;
             index = ;
             while (result)
             {
                 Identity = workSheet.Cell(index, ).Value + "";
                 if (string.IsNullOrEmpty(Identity))
                 {
                     result = false;
                 }
                 else
                 {
                     var model = new T();
                     var t = model.GetType();
                     foreach (var item in t.GetProperties())
                     {
                         var proper = keys.FirstOrDefault(p => p.Value == item.Name);
                         if (proper.Value == null)
                         {
                             item.SetValue(model, "", null);
                         }
                         else
                         {
                             item.SetValue(model, workSheet.Cell(index, proper.Key).Value + "", null);
                         }
                     }
                     list.Add(model);
                     index++;
                 }

             }

             return list;
         }

         public bool WriteExcel<T>(List<T> source,string filePath)
         {
             var type = typeof(T);
             CreatNewFile(filePath, type.Name);
             XLWorkbook RootElement = new XLWorkbook(filePath);
             List<T> list = new List<T>();
             IXLWorksheet workSheet = RootElement.Worksheet(type.Name);
             int i = ;

             Dictionary<int, string> keys = new Dictionary<int, string>();
             foreach (var item in type.GetProperties())
                 keys.Add(i++, item.Name);

             i = ;
             foreach (var key in keys)
                 workSheet.Cell(i, key.Key).Value = key.Value;

             foreach (var item in source)
             {
                 i++;
                 type = item.GetType();
                 foreach (var key in keys)
                 {
                     var vaue = type.GetProperty(key.Value);
                     if (vaue != null)
                         workSheet.Cell(i, key.Key).Value = vaue.GetValue(item);
                     else
                         workSheet.Cell(i, key.Key).Value = "";
                 }
             }
             RootElement.Save();

             return true;
         }

     }