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// lots of code above here - (void)applicationDidFinishLaunching:(UIApplication *)application { // Set up our foods database as the databaseName databaseName = @"foods.db"; // Get the path to the documents directory and append the database name NSArray *documentPaths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDir = [documentPaths objectAtIndex:0]; databasePath = [documentsDir stringByAppendingPathComponent:databaseName]; // Check for existing database and create if necessary [self checkAndCreateDatabase]; // Query the database for all foods and populate the array [self readFoodsFromDatabase]; // more code follows We use several built-in features to find the foods.db SQLite file in the project. NSSearchPathForDirectoriesInDomains, NSDocumentDirectory, and NSUserDomainMask are all constants provided by the iOS SDK to find the paths within the running environment. In this case, these lines are effectively a shortcut to the current application s location, wherever that may be. We end up with the location of the foods.db file in the databasePath variable. Our logic then splits into code that handles locating the database (or creating it afresh from the project) and code to query our database. The code for locating the database is not really SQLite specific, covering simple file-handling operations. See the iSeinfeldAppDelegate.m file included with the source code for how this works. Opening the database and using our SQLite APIs to query the data is where the action is at. Our readFoodsFromDatabase function does this work, so let s review it in detail. -(void) readFoodsFromDatabase { // Setup the database object sqlite3 *database; // Initialize the foods Array foods = [[NSMutableArray alloc] init]; // Open the database if(sqlite3_open_v2([databasePath UTF8String], &database) == SQLITE_OK) { // Setup the SQL Statement and compile it for faster access const char *sqlStatement = "select count(foods_episodes.episode_id) popularity, min(foods_episodes.episode_id) first_seen, foods.name from foods inner join foods_episodes on foods.id = foods_episodes.food_id group by foods.name order by popularity desc, name limit 50 "; winforms upc-a reader Packages matching Tags:"UPC-A" - NuGet Gallery
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Oct 26, 2012 · Sample WinForms app that uses Barcode Reader SDK to recognize, read and decode most popular linear (1D) barcodes from digital images, ... Figure 3-7. Merged child items with assignment information Perhaps business logic could be added to properties to throw exceptions if they were called from an inappropriate context. But the obvious complexity of this sort of logic should give you pause. The problem is that one object is trying to handle more than one responsibility. Such a scenario means that the object model is flawed. Going down such a path will lead to complex, hard-to-maintain code. word qr code font, microsoft word ean 13, birt data matrix, birt pdf 417, birt code 128, download barcode 128 font word winforms upc-a reader Drawing UPC-A Barcodes with C# - CodeProject
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NET WinForms or web program, you can directly use all linear barcode reading features it provide, such as reading UPC-A barcode from rotated image (180 ... But in the service-oriented world, where the supporting infrastructure is vastly more intricate and decoupled, you cannot have such a high level of faith that calls will always go through Recall that XML messages are the gold currency of service requests Messages can experience trouble at many steps along the way Trouble in the transport channel can prevent them from being delivered Trouble in the service s server or firewall can prevent the service from ever responding to a received message Furthermore, messages may be tampered with, so that they are malformed or suspect when they do reach their intended target SOA accommodates all of these many potential problems using a set of technologies that maintain the integrity of a service request even if things go wrong along the way. Historically, this sort of complex code was referred to as spaghetti code. It turns out that with improper object design, it is very possible to end up with spaghetti code in business objects. The result is terrible and is exactly what good object design is intended to prevent. winforms upc-a reader .NET UPC-A Barcode Reader/Scanner Control | How to Scan UPC ...
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Compatible with GS1 Barcode Standard for linear UPC-A encoding in .NET applications; Generate and create linear UPC-A in .NET WinForms, ASP.NET and . sqlite3_stmt *compiledStatement; if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { // Loop through the results and add them to the foods array while(sqlite3_step(compiledStatement) == SQLITE_ROW) { // Read the data from the result row NSString *aFreq = [NSString stringWithUTF8String: (char *)sqlite3_column_text(compiledStatement, 0)]; NSString *aPop = [NSString stringWithUTF8String: (char *)sqlite3_column_text(compiledStatement, 1)]; NSString *aName = [NSString stringWithUTF8String: (char *)sqlite3_column_text(compiledStatement, 2)]; // Create a new food object with the data from the database Food *food = [[Food alloc] initWithName:aName first_episode:aFreq popularity:aPop]; // Add the food object to the foods Array [foods addObject:food]; } [food release]; It should be quite clear at this point that merging the two collections or their child objects into a single set of objects isn t the right answer. They have different responsibilities, so they should be separate objects. But this leaves one glaring issue: what about the common properties and any common business logic they might require How can two objects use the same data without causing duplication of business logic winforms upc-a reader UPC-A .NET WinForms Library - UPC-A barcode image generator ...
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