列头存在大写字母就报错的bug修改

performance/Performance.Services/DownloadService.cs

@@ -245,7 +245,7 @@ public string AllComputerDown(sys_hospital hospital, List<dynamic> dynamics, str
                         {
                             var temp = data.ElementAt(row);
                             var low = temp.Keys.ToString().ToLower();
-                            var value = temp[headList[col].Name.ToLower()];
+                            var value = temp.GetValue(headList[col].Name, "");
 
                             worksheet.Cells[row + 3, col + 1].Value = value;
                         }