private static void DataTableToSQLServer( DataTable dt)
        {
            string connectionString = GetConnectionString();

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

                using (SqlBulkCopy bulkCopy =new SqlBulkCopy(destinationConnection))
                {


                    try
                    {

                        bulkCopy.DestinationTableName = "T_EIInformation";//要插入的表的表明
                        bulkCopy.ColumnMappings.Add("Email", "Email");//映射字段名 DataTable列名 ,数据库 对应的列名
                        bulkCopy.ColumnMappings.Add("author", "author");
                        bulkCopy.ColumnMappings.Add("Title", "Title");
                        bulkCopy.ColumnMappings.Add("Type", "Type");
                        bulkCopy.ColumnMappings.Add("confName", "confName");
                        bulkCopy.ColumnMappings.Add("Language", "Language");
                        bulkCopy.ColumnMappings.Add("Publicationyear", "Publicationyear");
                        bulkCopy.ColumnMappings.Add("Conferencelocation", "Conferencelocation");
                        bulkCopy.WriteToServer(dt);
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                    }
                    finally
                    {
                        // Close the SqlDataReader. The SqlBulkCopy
                        // object is automatically closed at the end
                        // of the using block.
                       
                    }
                }

       
            }
            
        }