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6 Mar 2019 ... . NET OCR Library API for Text Recognition from Images in C# & VB . NET . ... Easy to extract text from PDF file and convert PDF to txt file in C# & VB . NET projects. Support PDF text extraction & PDF text conversion in . NET Class Library, ASP. NET web, . NET WinForms, Console applications. { if (emp.Territories == null) emp.Territories = new StringCollection(); object o = e.Element.Attributes["territorydescription"].Value; emp.Territories.Add(o.ToString()); } If the territory description is not expressed as an attribute, you can use the InnerText property of the terr element to get its value. Figure 11-3 shows the sample application in action. The application retrieves the data for a particular employee, copies the data into an instance of the Employee class, and then displays the data through the user interface. vb.net code to extract text from pdf: VS 2010 Read TEXT from PDF file-VBForums vb.net pdf read text PDF Document Reading in C#. net using itext sharp . - CodeProject
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VB . Net , Read PDF Line by Line as Displayed in Viewer Dear Forum ... Text = Counter & " - " & EmpNo ' show the number of processed file . The preceding ConvertToPositiveIntValue function is a simple example of control flow for exception handlers. The sequential CFDs in Figure 6-6 for the ConvertToPositiveIntValue function illustrate how control flow jumps around or to the appropriate exception handler. A block test that passes a string argument of whole numbers between 0 and 2147483647 will convert the string passed to the number parameter to an integer and exit the function, as illustrated by the first CFD in Figure 6-6. To test the exception handlers we require a minimum of two additional tests. For the second test, we pass a noninteger value (string, empty string, characters, and so forth) to the number parameter. Any noninteger value will cause a format exception error to be thrown and control jumps from A1 to A2 where the return value is set to -1 before control flow exits and returns to the calling function. The third test must exercise the overflow exception handler. A string argument representing a whole number larger than 2147483647 or any negative whole number results in an overflow exception within the try block A1 and control jumps to the overflow exception handler. itextsharp read pdf fields vb.net How to read pdf line by line and fetch the data in c# - C# Corner
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16 Aug 2018 ... Steps to extract text in PDF programmatically: Create a new C# console application project. Install the Syncfusion. Pdf .WinForms NuGet package as reference to your . NET Framework applications from NuGet.org. Include the following namespaces in the Program.cs file. Figure 11-3: Using the XML serializer to deserialize the output of a SQL Server XML query. Note The query used in this sample application restricts the output to at most one record so that the final XML output will be an XML document instead of an XML fragment. XML fragments are not read by the XML serializer. directory because it's now fully redistributable Do not install it into the %SYSTEMROOT%\System32 directory DBGHELPDLL is a part of Debugging Tools for Windows (that is, WinDBG), which is included with the sample files for this book To get the latest version of DBGHELPDLL, go to http://wwwmicrosoftcom/ddk/debugging/ and download Debugging Tools for Windows After you install everything, you can extract DBGHELPDLL from the Debugging Tools for Windows directory The next snippet of code is the prototype for MiniDumpWriteDump The parameters are generally self-explanatory, but I want to discuss a few highlights The first parameter, the handle to the process, must have read and query rights Since many of our programs are not running with full Administrator rights, you might need to do the security dance to ensure you have the rights to call MiniDumpWriteDump if you're doing impersonation or other cross user/rights programming. However, in all the different types of applications I've used MiniDumpWriteDump in, I've never needed to do any security work on the process handle BOOL MiniDumpWriteDump ( HANDLE hProcess , DWORD ProcessId , MINIDUMP_TYPE , PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam , PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam, PMINIDUMP_CALLBACK_INFORMATION CallbackParam ); The fourth parameter is the type of dump you want to write This enumeration seems to be updated with every release of Debugging Tools for Windows, so make sure you do a custom installation of Debugging Tools for Windows and install the SDK components to get the latest DBGHELPH header file What's not clear from the documentation is that you can OR together the various MINIDUMP_TYPE enumeration flags to request that additional bits of information be written to the dump No matter what you do, you'll always want to ensure MiniDumpWithHandleData is included so that you can get the handle information. Performance Considerations The first time you write test code that invokes the XML serializer, you'll notice that it takes a while to complete when compared to SOAP or binary serialization. When the serializer object is created, an unknown assembly is loaded. If you run the sample application and monitor the output window, you'll see something like this : 'Sql2Class_CS.exe': Loaded 'qsxgw21i', No symbols loaded. 416 Figure 6-6: Sequential control flow diagrams for ConvertToPositiveIntValue function. In the CFD, the statements int.Parse() and (int)Convert.ToUInt32() are represented by the single node A1 because it is not important to differentiate between the two statements for the purpose of block testing. However, testers must also realize that these two process statements set up specific input minimum and maximum boundary conditions for the number parameter. The int.Parse() function converts a string representation of a whole number to a signed integer value within the range of -2,147,483,648 to 2,147,483,647. The Convert. ToUInt32 function converts a System.String representation of a whole number to an integer value between 0 and 4,294,967,296. Although we require only one block test to evaluate control flow through the overflow exception handler, the professional tester also realizes that additional boundary testing is required for adequate evaluation of this function. If you're working with secure applications or have customers that are extremely concerned about protecting data, MiniDumpWriteDump can expose information in the dump that you DBGHELPDLL shouldn't see To protect users, Microsoft introduced two flags with 61171 and later versions: MiniDumpFilterMemory and MiniDumpFilterModulePaths The former removes private data unnecessary for stack walking, and the latter filters pathnames for usernames and important directory names Although useful, MiniDumpFilterModulePaths can make finding the modules in a minidump harder The final parameter of interest is the fifth, ExceptionParam You'll set this parameter to a pointer to an EXCEPTION_POINTERS structure to get the crash information added to the minidump For the final two parameters, you'll almost always pass NULL. However, if you do want to consider writing custom information the key program state, user preferences, object lists, or anything else your heart desires you can plop information into the 504 DumpType , HANDLE hFile. The name of the first assembly varies each time you create the XML serializer, a clear sign that it is a temporary assembly created on the fly. We'll examine the internal architecture of the XML serializer in the next section. For now, consider that each instantiation of the XmlSerializer class results in an ad hoc assembly being created and loaded. After that, the reading and writing performance you get from the XML serializer is not different from that of other types of reading/writing tools. The creation of the assembly takes several milliseconds probably several hundred milliseconds as compared to the one or two milliseconds that serializing a class might take. This means that using the XML serializer taxes you for about half a second each time you instantiate the XmlSerializer class. This book's sample files include a console application named Perf-Test that demonstrates the differences in performance you get when using XML serialization and ad hoc user code. The output is the same, but custom code runs significantly faster. On the other hand, the XML serializer saves you from writing and testing complex code for complex classes. Keep these issues in mind if you are using XML serialization and want to improve the overall performance. Note The full source code for the sample application demonstrating the deserialization of SQL Server XML queries to .NET Framework classes is available in this book's sample files. The application is named Sql2Class. The application demonstrates attribute overriding and works with FOR XML and FOR XML ELEMENTS queries. In addition, it compares the performance of the serializer and a piece of ad hoc code mapping XML data to the same class. Block testing is a common testing approach used for unit testing, and it is quite valuable to quickly evaluate the basic functionality of a function. It is also a valuable technique to design tests to exercise control flow of switch/case statements and exception handlers. However, block testing is a weak criterion for robust structural testing and can miss important branches of control flow. It is also very easy to overlook potential problems, especially if the only purpose of the testing is to achieve increased code coverage and not to carefully analyze the code under test. UserStreamParam parameter and get it written to the minidump file It'll be up to you to read the user streams out with MiniDumpReadDumpStream, but the good news is that you're limited only to your imagination regarding what you want to have in a minidump Pacifying MiniDumpWriteDump When I first looked at MiniDumpWriteDump, I immediately realized that I needed a wrapper function around it to accomplish two things: hiding the grunge of GetProcAddress because I wanted to ensure my code ran on a stock copy of Windows 2000; and avoiding having to open the file before every call to MiniDumpWriteDump After I'd done the first version of my simple wrapper, I realized I was never going to do more than set the ExceptionParam parameter to point to the EXCEPTION_POINTERS structure I was processing in a crash My minidump function for writing dumps in your crash handler function is CreateCurrentProcessCrashDump. read pdf file using itextsharp vb.net How to read PDF files in VB . net or convert PDF to word document in ...
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