實現功能的核心程式碼

SqlConnection destinationConnection = new SqlConnection(connectionString);
destinationConnection.Open();

SqlBulkCopy bulkCopy = new SqlBulkCopy(destinationConnection);

bulkCopy.DestinationTableName = "checkinout";//要插入的表的表名
bulkCopy.BulkCopyTimeout = 600;
bulkCopy.BatchSize = dt.Rows.Count;
bulkCopy.ColumnMappings.Add("ID", "ID");//對映欄位名 DataTable列名 ,資料庫 對應的列名  
bulkCopy.ColumnMappings.Add("TIME", "TIME");                      
bulkCopy.WriteToServer(dt);