c# .net core barcode generator

c# .net core barcode generator

c# .net core barcode generator

c# .net core barcode generator

c# .net core barcode generator,

c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,

c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,

c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,

When using the Apple-provided preference editors, all of the settings on a single page are managed as a group. This is important to remember, especially when managing certain preferences Once. Recall that if you make changes to a group of preferences managed Once, they are applied once again. Here is a specific example. In Figure 12-12, we managed the Home Sync settings Once. We specified ~ as the sync folder, and we had a list of exclusions. If we apply these preferences Once, the users are able to alter the list of folders to sync. Perhaps they decide they don t want to sync the entire home folder, and use the Mobile Accounts Preferences dialog (shown in Figure 12-13) to set synchronization only for their Desktop and Documents folders. Later we determine that we need to add an item to the Home Sync exclusion list: we have an application that creates lock files for its documents, and the names of these lock files end with .lockfile . If we add this exclusion to the exclusion list, as seen in Figure 12-14, and then apply these changes, the user who had set a list of synced folders to only the Desktop and Document folders will find the list reset to sync the entire home folder.

Called by data binding to add an item to the end of the collection; an ItemAdded type ListChanged event is raised by the collection Inserts an item into the collection; an ItemAdded type ListChanged event is raised by the collection Removes an item from the collection; an ItemDeleted type ListChanged event is raised by the collection

pthread_mutex_destroy(&share->mutex); my_free((gptr)share->table_name, MYF(0)); } pthread_mutex_unlock(&spartan_mutex); DBUG_RETURN(0); } Now would be a good time to compile and check for errors. When you re done, you can begin on the modifications for the index methods. The first thing that needs to be done is to go back through the open, create, close, write, update, delete, and rename methods and add the calls to the index class to maintain the index. The code to do this involves identifying the field that is the key and then saving the key and its position to the index for retrieval later. The open method must open both the data and index files together. The only extra step is to load the index into memory. Locate the open() method in the class file and add the calls to the index class for opening the index and loading the index into memory. Listing 7-39 shows the method with the changes. Listing 7-39. Changes to the open() Method in ha_spartan.cc int ha_spartan::open(const char *name, int mode, uint test_if_locked) { DBUG_ENTER("ha_spartan::open"); char name_buff[FN_REFLEN]; if (!(share = get_share(name, table))) DBUG_RETURN(1); share->data_class->open_table(fn_format(name_buff, name, "", SDE_EXT, MY_REPLACE_EXT|MY_UNPACK_FILENAME)); share->index_class->open_index(fn_format(name_buff, name, "", SDI_EXT, MY_REPLACE_EXT|MY_UNPACK_FILENAME)); share->index_class->load_index(); current_position = 0; thr_lock_data_init(&share->lock,&lock,NULL); DBUG_RETURN(0); } The create method must create both the data and index files together. Locate the create() method in the class file and add the calls to the index class for creating the index. Listing 7-40 shows the method with the changes. Listing 7-40. Changes to the create() Method in ha_spartan.cc int ha_spartan::create(const char *name, TABLE *table_arg, HA_CREATE_INFO *create_info) { DBUG_ENTER("ha_spartan::create"); char name_buff[FN_REFLEN];

A ListChanged event is raised when the user adds or removes an item from the original collection. This event must be handled and sometimes reraised by the view. This is illustrated in Figure 5-2. Figure 5-2 shows the simple case, in which both the original collection and the view are bound to separate controls on the UI, and an update to the original collection is made. However, when the user adds or removes an item through the view, the view raises a ListChanged event as well as updating the original collection. Of course, updating the original collection triggers its ListChanged event. If you re not careful, this could result in duplicate events being raised, as shown in Figure 5-3. In this case, the UI control bound to the sorted view gets the ListChanged event twice, which is wasteful. But when the change is applied to the original collection, its event could flow back to the view and then to the UI.

if (!(share = get_share(name, table))) DBUG_RETURN(1); if (share->data_class->create_table(fn_format(name_buff, name, "", SDE_EXT, MY_REPLACE_EXT|MY_UNPACK_FILENAME))) DBUG_RETURN(-1); if (share->index_class->create_index(fn_format(name_buff, name, "", SDI_EXT, MY_REPLACE_EXT|MY_UNPACK_FILENAME), 128)) DBUG_RETURN(-1); share->index_class->close_index(); share->data_class->close_table(); DBUG_RETURN(0); } The close method must close both the data and index files together. However, since the index class uses an in-memory structure to store all changes, it must be written back to disk. Locate the close() method in the class file and add the calls to the index class for saving, destroying the in-memory structure and closing the index. Listing 7-41 shows the method with the changes. Listing 7-41. Changes to the close() Method in ha_spartan.cc int ha_spartan::close(void) { DBUG_ENTER("ha_spartan::close"); share->data_class->close_table(); share->index_class->save_index(); share->index_class->destroy_index(); share->index_class->close_index(); DBUG_RETURN(free_share(share)); } Now let s make the changes to the writing and reading methods. However, since it is possible that no keys will be used, the method must check that there is a key to be added. To make things easier to work with, I ve written two helper methods: get_key(), which finds the key field and returns its value or 0 if there are no keys, and get_key_len(), which returns the length of the key. Listing 7-42 shows these two helper methods. Go ahead and add those methods now to the ha_spartan.cc file. Listing 7-42. Additional Helper Methods in ha_spartan.cc byte *ha_spartan::get_key() { byte *key = 0; DBUG_ENTER("ha_spartan::get_key");