WPF datagrid 数据导出为 Excel 表格

 using System;

    
 using System.Collections.Generic;
    
 using System.Linq;
    
 using System.Text;
    
 using System.Threading.Tasks;
    
 using System.Windows.Controls;
    
  
    
 namespace AstroATE
    
 {
    
     class ExportToExcel
    
     {
    
     public bool Export(DataGrid dataGrid, string excelTitle)
    
     {
    
         System.Data.DataTable dt = new System.Data.DataTable();
    
         for (int i = 0; i < dataGrid.Columns.Count; i++)
    
         {
    
             if (dataGrid.Columns[i].Visibility == System.Windows.Vis