Application Design in .NET

Encoder QR Code ISO/IEC18004 in .NET Application Design
Application Design
QR Code 2d Barcode Decoder In VS .NET
Using Barcode Control SDK for .NET framework Control to generate, create, read, scan barcode image in Visual Studio .NET applications.
Use a programming language, such as Java, that hides memory allocation and size matching problems from the developers. Java applications don t suffer from random results caused by buffer overflow or index values out of bounds because these structures are handled opaquely and dynamically.
QR Code Generator In Visual Studio .NET
Using Barcode generation for .NET framework Control to generate, create QR Code image in .NET framework applications.
EXPECT THE UNEXPECTED
QR Code 2d Barcode Reader In .NET Framework
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
Opening slide from a USENIX talk: /* not reached */ is the surest way to be sure that piece of code will be executed. If there s a code path that can only be reached through the right combination of bizarre inputs, corner cases, and ill-advised user actions, it will happen. Test this combination, and see how the application behaves; at the least make sure it complains nicely and produces diagnostics. Hal
Draw Bar Code In .NET
Using Barcode encoder for .NET Control to generate, create bar code image in Visual Studio .NET applications.
Boundary checking from a technical perspective requires that you understand how an application will handle or mishandle the entire range of inputs and index values. There is also a business aspect to boundary checking is the application doing something that makes sense The second aspect of boundary condition checking is to add these business-rule-driven checks, sometimes called value-based security checks.
Read Barcode In .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in VS .NET applications.
Value-Based Security
Draw QR Code ISO/IEC18004 In Visual C#.NET
Using Barcode encoder for .NET Control to generate, create QR Code 2d barcode image in .NET framework applications.
Assume you have an inventory application that lets you move from 1 to 1,000 widgets at a time between warehouses. The lower bound is simple logic; the upper bound is set by the size of a truck or the number of widgets in a packing crate. What if a user requests a transfer of 547 widgets, but only 13 remain in the source warehouse The request is perfectly well formed, but it doesn t make sense in the business context. As an application developer, you have no insight into these business rules. As someone charged with improving reliability and predictability, you need to capture these rules and cast them as simple boundary condition checks that can be added to the application.
Printing QR In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
13
Quick Response Code Drawer In VB.NET
Using Barcode encoder for .NET Control to generate, create QR Code image in .NET framework applications.
THE $300,000 LETTER
EAN-13 Maker In VS .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create GTIN - 13 image in .NET applications.
Several years ago, a Wall Street trading firm received some negative press for processing a perfectly valid trade for the wrong security. A trader had written a ticket for several thousand shares of Verizon-predecessor NYNEX, ticker symbol NYN, but, probably due to sloppy handwriting, it was read as symbol NVN during trade entry. NVN was another valid symbol, only instead of a high-volume, well-known utility stock, it was a small bond fund that traded only a few hundred shares a day. The resulting sell order for NVN sent the stock into a downward spiral, until someone noticed that the order size and average volume simply didn t make sense. The firm found the error, corrected it by buying back the NVN and properly selling the NYN, but not until a number of holders of NVN had the color drain from their faces. Net effect: several hundred thousands of dollars in slippage as prices had moved while the trades were unwound. How do you fix something like this Checking the size on a ticket versus the average volume is a start and is now standard practice for trading floors. Wall Street adopts the exceptions and corner cases as standard practice quickly to prevent the same mistake from being made twice. Hal
Make Barcode In .NET Framework
Using Barcode printer for VS .NET Control to generate, create barcode image in .NET framework applications.
Typical business rules that need to be included in application logic include checks for quantity desired versus quantity on hand, or average size versus requested size; time and sequence problems; and dollar amount or value of a transaction versus the permitted or valid amount for that user. Some of the more complex uses of value-based security entail adding authentication checks for certain transaction types, such that first-level employees cannot move millions of dollars, or employees below VP level cannot adjust salaries more than 15 percent without additional authorization. Typically, value-based security can be enforced by a database, using stored procedures or triggers to run additional checks on the records about to be inserted or modified, but it can also be done at the application logic level.
UPC-A Maker In VS .NET
Using Barcode drawer for .NET framework Control to generate, create GTIN - 12 image in Visual Studio .NET applications.
Painting 2/5 Industrial In .NET Framework
Using Barcode encoder for .NET Control to generate, create Industrial 2 of 5 image in VS .NET applications.
Barcode Creation In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create barcode image in ASP.NET applications.
Barcode Creation In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create bar code image in ASP.NET applications.
Printing Bar Code In Java
Using Barcode creation for Java Control to generate, create bar code image in Java applications.
Making EAN / UCC - 13 In Visual Basic .NET
Using Barcode generation for .NET Control to generate, create EAN13 image in Visual Studio .NET applications.