Add github action script and fixbug

Extensions/ExcelWorksheetExtension.cs

@@ -0,0 +1,19 @@
+using OfficeOpenXml;
+using System;
+using System.Collections.Generic;
+
+namespace BMA.EHR.Recruit.Service.Extensions
+{
+    public static class ExcelWorksheetExtension
+    {
+        public static string[] GetHeaderColumns(this ExcelWorksheet sheet, int row = 1)
+        {
+            List<string> columnNames = new List<string>();
+            foreach (var firstRowCell in sheet.Cells[row, sheet.Dimension.Start.Column, 1, sheet.Dimension.End.Column])
+                columnNames.Add(firstRowCell.Text);
+            return columnNames.ToArray();
+        }
+
+
+    }
+}