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Read the pdf Documents line by line and search the data then fetch the data. ... using iTextSharp .text. pdf .parser;; PdfReader reader = new ... Table 15-2: Predefined Section Handlers Class Description DictionarySectionHandler Reads name/value pairs and groups them in a hash table object The SystemConfiguration classes ignore IgnoreSectionHandler the sections marked with this handler because their contents will be processed by other components This handler is an alternative to using and declaring custom handlers Reads name/value pairs from a file NameValueFileSectionHandler referenced in the <appSettings> section and groups them in a NameValueCollection object Reads name/value pairs and groups them NameValueSectionHandler in a NameValueCollection object SingleTagSectionHandler Reads settings from attributes stored in a single XML node The data is returned as a hash table In the NET Framework, the classes in the SystemConfiguration namespace are responsible for parsing the contents of the configuration files These classes are designed to process the entire contents of the configuration files. itextsharp read pdf fields vb.net vb . net form fill | Adobe Community - Adobe Forums
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hello i have 40 PDF files... how can i read text from it one by one....? ram. ... VBForums - Visual Basic and VB .NET Discussions and More! ... Re: how to read pdf files. You might find this thread useful: Displaying PDF's in VB6. One key point to remember is that the x86 CPUs are very flexible and provide you with many ways to carry out similar operations. Fortunately for us, the Microsoft compilers do a good job of picking the fastest way to do an operation and reusing that construct wherever applicable, so recognizing what a section of code is doing is easier. In the following sections, I'll cover the most commonly used instructions you'll see in assembly language. If you're interested in all the assembly-language instructions, you can consult the Intel manuals. Registers The first topic I want to cover is the registers. Because every bit of data that your application handles passes through the registers at one time or another, knowing the purpose of each register can help you recognize code gone awry. x86 CPUs have eight general-purpose registers (EAX, EBX, ECX, EDX, ESI, EDI, ESP, and EBP), six segment registers (CS, DS, ES, SS, FS, and GS), an instruction pointer (EIP), and a flags register (EFLAGS). The CPU has other registers as well, such as the debug and machine control registers, but they're special-purpose registers and you won't encounter them in normal user-mode debugging. Figure 7-9 shows the layout of a general-purpose register. The thing to remember is that some of the registers allow mnemonics to access different portions of the complete 32-bit register. The complete breakdown of all generalpurpose registers is listed in Table 7-6. The only segment register of interest for this discussion is the FS register, which holds the thread information block (TIB) that describes the currently executing thread. The other segment registers are used, but the operating system configures them in such a way that they're transparent to normal operation. The instruction pointer holds the address of the currently executing instruction. Figure 7-9: General.purpose register layout The flags register, EFLAGS, contains the status flags and the control flags. Various instructions set bits in EFLAGS to indicate the result of those instructions. For example, the ZF (Zero Flag) bit is set to 1 when the result of an instruction is 0. In 4, I described setting the CPU to single-step mode, which involved setting the TF (Trap Flag) in the EFLAGS register. Figure 7-10 shows the Registers window from the Visual Studio .NET debugger. The Registers window displays the EFLAGS register as EFL. Notice that I'm not showing floating-point registers or any of the other special registers such as MMX or 3DNow! in the Registers window. You can choose the registers you want to see by rightclicking in the Registers window and selecting the registers you're interested in from the context menu. Log something like: The classes also throw an exception when a configuration section lacks a corresponding entry in the <configSections> block and when the layout of the data does not match the declaration Of the five section handlers, we have examined NameValueSectionHandler and NameValueFileSectionHandler The DictionarySectionHandler class is very similar; it differs only in that it stores settings in a hash table instead of in a NameValueCollection object Collection objects are more efficient if they are used to store a small number of items (ideally fewer than 10), whereas a hash table provides better performance with large collections of items The IgnoreSectionHandler and SingleTagSectionHandler classes deserve a bit more attention, and we'll look at them next The IgnoreSectionHandler Section Handler A few subsystems in the NET Framework store configuration data in the machineconfig file but process the data themselves, without relying on the services provided by the SystemConfiguration classes. Table 7-6: General.Purpose Registers 32-Bit Register 16-Bit Acces s Low-Byte Access (Bits 0 7) HighByte Access (Bits 8 15) AH BH CH DH Loop instruction counters use this register for counting. The high 32 bits of 64-bit values are stored here. In memory move or compare instructions, the source address is stored here. In memory move or compare instructions, the destination address is stored here. The stack pointer. This register is changed implicitly when calling functions, returning from functions, making room on the stack for local variables, and cleaning up the stack. Base/frame pointer. This register holds the stack frame for a procedure. Special Uses Figure 7-10: The Visual Studio .NET Registers window Table 7-7 lists the flag values shown in the Registers window. The Visual Studio .NET documentation doesn't mention what the flag values in the Registers window mean, so you might never have seen these values before. Unfortunately, the mnemonics Visual Studio .NET uses for these flags don't correspond to the Intel mnemonics, so you'll have to translate when referring to the Intel documentation. However, one nice change to the Registers window with Visual Studio .NET is that the actual flag values change to red when they change. Previous editions of Visual Studio never highlighted the changed flag fields in any way, so it was very hard to determine what had changed. Fortunately, for essentially 100 percent of your native debugging, you'll never need to watch the flags. For example, the machineconfig file contains remoting and startup information that is processed outside the configuration engine To prevent the configuration file from parsing exceptions, you can use a dummy section handler IgnoreSectionHandler This handler handles sections of configuration data rather than relying on the classes in SystemConfiguration It could be argued that such data should be stored in a system configuration file, like the machineconfig file, or in a custom file Looking at the following excerpt from the machineconfig file, you can see that remoting configuration settings are processed by the remoting classes, whereas HTTP run-time configuration settings are processed by a custom handler: <!-- Tell the NET Framework to ignore these sections --> <section name="systemruntimeremoting" type="SystemConfigurationIgnoreSectionHandler, System, Version=1033000, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> 518. Test Failed Win32BoolAPI with arguments Arg1, Arg2, Arg3 returned 0 and set the last error to 0x57, expected 1 and 0x0 Table 7-7: Registers Window Flag Values Registers Window Flag Meaning Intel Manual Mnemoni c OF DF Notes <!-- Employ a custom section handler --> <section name="httpRuntime" type="System.Web.Configuration.HttpRuntimeConfigurationHandler, System.Web, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> In both cases, configuration settings need a customized and more sophisticated layout than name/value pairs. In the first scenario, the handler is embedded in the remoting subsystem; in the second scenario, the handler conforms to the configuration guidelines but is simply not one of the predefined handlers. As mentioned, because by design the configuration classes read through all the contents of a configuration file and throw exceptions whenever they encounter something wrong, custom settings handled outside the configuration namespace must have a section handler, although one that does nothing the IgnoreSectionHandler handler. The SingleTagSectionHandler Section Handler The SingleTagSectionHandler class supports a simpler schema for storing configuration settings. Unlike NameValueSectionHandler, which supports name/value pairs defined within <add> nodes, the SingleTagSectionHandler class uses a single XML node with as many attributes as needed. Each attribute maps to a setting, and the name of the attribute is also the key to access the value. In other words, the SingleTagSectionHandler class provides an attribute-based view of the configuration settings, whereas the NameValueSectionHandler class (and DictionarySectionHandler as well) provides an element-based representation. The following code shows the way in which settings are stored by a single tag section handler: <configuration> <configSections> <section name="MyCountries" type="System.Configuration.SingTagSectionHandler" /> </configSections> <MyCountries country1="USA" country2="Italy" country3="Iceland" /> </configuration> Under the Hood of Section Handlers As mentioned, a configuration section handler is simply a managed class that implements the IConfigurationSectionHandler interface. The classes that implement the IConfigurationSectionHandler interface define the rules for transforming pieces of XML configuration files into usable objects. The created objects can be of an arbitrary type. The following code shows the interface signature: public interface IConfigurationSectionHandler { object Create(object parent, object configContext, XmlNode section); } 519 vb.net adobe pdf reader component Read text from PDF using iTextSharp
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