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This is true by default; setting it to false reverts to the pre-.NET 4 behavior. With this option switched on, Example 14-6 is equivalent to Example 14-7, because the EF will call Load for us when we first try to use the navigation property. (The collection ignores calls to Load if the entities are already loaded, so requesting multiple loads is not a problem.) In either case, the EF has to make an extra trip to the database. The call to Single will fetch the customer from the database before returning, which means that a second request is required when we later ask it (either explicitly or implicitly) to fetch the related rows, because the EF didn t know we were going to use these items until we asked for them. This might not be a problem, but in general, the more trips you make to the database, the slower things go. java gs1-128 Generating a GS1 - 128 (formerly EAN - 128 ) barcode using ZXing ...
ZXing does support GS1 - 128 (formerly called EAN - 128 ) but ... is an open source Java barcode generator which supports EAN - 128 / GS1 - 128 . java gs1 128 Generate, print GS1 128 ( EAN 128 ) in Java with specified data ...
Generate high quality GS1 128 ( EAN 128 ) images in Java by encoding GS1 128 ( EAN 128 ) valid data set and valid data length, such as start and stop letters. Be wary of enabling lazy loading, because it can sometimes result in a lot of unnecessary database requests. For example, one author was involved with a project that had some diagnostic code that helpfully wrote a snapshot of certain objects into a log, including the value of all their properties. Unfortunately, this code was recursive if a property referred to another object, it would display that too, and if a property referred to a collection of objects, it would show all of them. This logging code had cycle detection, so it wouldn t get stuck in an infinite loop, but otherwise it wouldn t stop until it had showed every object reachable from the starting point. Unfortunately, lazy loading was enabled, so when this code was given an entity, it ended up fetching all entities that were related, no matter how distantly, to the first object at hand, so it hammered the database with thousands of requests each time a log entry was generated. Modern databases are surprisingly fast it s possible for this sort of problem to go unnoticed on development machines with their own local database instance. But you probably don t want it happening on a busy live server. java barcode ean 128 Java EAN - 128 / GS1 - 128 - Barcode SDK
Java EAN - 128 / GS1 - 128 Generator is a mature and time-tested barcode generating library for Java developers. It will help users generate EAN - 128 / GS1 - 128 ... java gs1 128 Generating a GS1 - 128 (formerly EAN - 128 ) barcode using ZXing ...
ZXing does support GS1 - 128 (formerly called EAN - 128 ) but ... is an open source Java barcode generator which supports EAN - 128 / GS1 - 128 . To get consistent results you d want to make sure the initial query and subsequent lazy loads happen as part of a transaction (as shown later), but to ensure scalability in a busy system you want to minimize the number of requests made in any single transaction. So you can tell the EF that you want certain related entities to be fetched at the same time as the main result. You do this with the Include method shown in Example 14-8, which is available on any of the entity sets provided by the context. java ean 128 Generate, print GS1 128 ( EAN 128 ) in Java with specified data ...
Generate high quality GS1 128 ( EAN 128 ) images in Java by encoding GS1 128 ( EAN 128 ) valid data set and valid data length, such as start and stop letters. java gs1 128 Java GS1 128 (UCC/EAN-128) Barcode Generator, Barcode ...
Java EAN-128 generator is a mature and reliable Java barcode generation component for creating EAN-128 barcodes in Java, Jasper Reports, iReport, and ... The install command can be useful if you have a newer module for a hardware driver that you want to load in place of the one included in the kernel It s also useful when you are testing a module to verify that it is actually loaded by modprobe The remove command is similar to the install command, but the custom commands are executed first in place of the removal of the target module using the r flag of modprobe The remove command uses the following syntax: remove module_name your_commands where module_name is the name of the module on which to run the set of shell commands in your_commands when unloading the module. var customersWithOrderDetails = dbContext.Customers. Include("SalesOrderHeaders.SalesOrderDetails"); Customer myCustomer = customersWithOrderDetails.Single( cust => cust.CustomerID == 29531); Console.WriteLine(myCustomer.SalesOrderHeaders.Count); This call to Include asks to load related entities available through the Customer entity s SalesOrderHeaders property. (These will be loaded regardless of the lazy loading setting.) It also says that for each of those related entities, the EF should load any related entities visible through the SalesOrderDetails property. In other words, this tells the EF that we would like it to fetch all of the orders for this customer and all of the details for those orders. It will generate a single query that fetches all of the necessary information in one request. Altering the earlier custom install command for ide-cd to display messages when unloading it results in this command: remove ide-cd echo "IDE-CD module being unloaded" ; rmmod ide-cd ; echo "IDE-CD module unloaded" If you want to add module files or configuration files other than those in /etc/modprobed, use the include command, which has the syntax include target where target can be a directory or a file that modprobe can use Assuming you have created a custom modprobe configuration file called pentablettestload to load a new pen tablet driver you just compiled, you will use this command:. If you re wondering why it doesn t just prefetch all related items all of the time, consider the performance implications. In some circumstances, aggressively prefetching all related items might amount to attempting to copy a significant fraction of your database into memory! But even in more circumscribed cases, fetching more data than you need can slow your system down or reduce scalability. So far we have seen only so-called one-to-many relationships one customer can be related to many orders, one order can be related to many order details. But there are other kinds of relationships. java ean 128 Generate, print GS1 128 ( EAN 128 ) in Java with specified data ...
Generate high quality GS1 128 ( EAN 128 ) images in Java by encoding GS1 128 ( EAN 128 ) valid data set and valid data length, such as start and stop letters. java gs1 128 tmattsson/gs1utils: Utilities for GS1 barcodes - GitHub
Java library for GS1 data structures commonly used in barcodes , such as GTIN, GLN, SSCC ... Provides parsing of element strings used in GS1 - 128 barcodes .
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