使用不同的行使用Linq

Question

我使用linq分組數據，從以下代碼中可以看到，組我希望在組數據上交換並添加到另一個表。

但我只得到InvoiceHeader.Key，我不知道如何獲得其他領域

 DataTable VendorInvoiceStagingTable; 
     DataTable VendorInvoiceTable; 
     VendorInvoiceStagingTable = new Program().ReadExcelFile(@"C:\Users\huzaifa.gain\Desktop\Vendor invoice import - sample data set.xlsx", "Sheet2"); 
     var InvoiceHeadercollection = from row in VendorInvoiceStagingTable.AsEnumerable() 
          group row by row.Field<string>(VendInvoice.Number) into grp 
          select grp; 




     VendorInvoiceTable = new Program().CreateHeader(); 
     foreach (var InvoiceHeader in InvoiceHeadercollection) 
     { 

     VendorInvoiceTable.Rows.Add(InvoiceHeader.Key, ..... 


     } 

Answer 1

由於InvoiceHeader是IGrouping它實現IEnumerable你可以簡單地枚舉組中的項目，所以你可以使用foreach循環：

foreach (var InvoiceHeader in InvoiceHeadercollection) 
{ 
    foreach(var row in InvoiceHeader) 
     VendorInvoiceTable.Rows.Add(row); 
}