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How to show pdf page in picturebox field: ... the pdf in that. The webbrowser will use AcrobatReader to open the file in the WebBrowser control. This test was fun to watch, but the only bug it ever found was a slight memory leak (which is a critical bug on embedded systems). The drawback of monkey tests is that they are generally difficult to debug. Finding the exact combination of commands that led to the memory leak required that I write some additional tests. In this case, it was a leak in the Clipboard functionality, so a targeted test on cut, copy, and paste would have found the bug sooner. Grammar Models Another common form of MBT is testing with a grammar model. A grammar model describes the characteristics and structure of data such as an e-mail address, name, or text. Regular expressions are an example of an implementation of a grammar model. A common use of asp.net open pdf file in web browser using c# vb.net: How can you view a PDF in a picture box - CodeProject vb.net pdfreader class NuGet Gallery | Spire.PDFViewer 4.5.1
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27 Oct 2017 ... NET PDF Viewer for WebForms is a FREE ASP . NET component which enables your web applications to display and interact with PDF files. In situations in which the URL can't be determined unequivocally or might change on a per-user basis or because of other run-time factors, you can ask the wsdlexe utility not to hard-code the URL in the source By using the /urlkey command-line switch, you instruct the utility to dynamically read the Web service URL from the application's configuration file If you use a switch such as /urlkey:ActualUrl, the proxy class constructor changes as follows: using SystemConfiguration; public NorthwindInfoService() { String urlSetting ConfigurationSettingsAppSettings["ActualUrl"]; if ((urlSetting != null)) thisUrl = urlSetting; else // Defaults to the URL used to build the proxy thisUrl "http://server/salesreport/salesreportserviceasmx"; } ConfigurationSettingsAppSettings is a special property that provides access to the application settings defined in the <appSettings> section of the configuration file Configuration files are XML files that allow you to change settings without recompiling the application. read pdf file using itextsharp vb.net: VS 2010 Read TEXT from PDF file-VBForums vb.net webbrowser control open pdf VB.NET: Adobe PDF Viewer Use in Visual Studio - YouTube
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Finally, several test programs are included with DeadlockDetection, which comes with this book's sample files All of them are included in the main DeadlockDetectionTests solution, and all link against DEADLOCKDETECTIONDLL, so you can use them to see how DeadlockDetection operates What's Next for DeadlockDetection DeadlockDetection is a fairly complete utility, and I've used it successfully to track down quite a few multithreaded deadlocks As always, however, I encourage you to look for ways that you can extend DeadlockDetection to make it more useful Here are some of my ideas for enhancements to DeadlockDetection: Create a stand-alone application to manipulate the DEADLOCKDETECTIONINI file Your program could be even nicer if it allowed you to set the DeadDetExt DLL and validated that the selected DeadDetExt DLL exported the correct functions You could optimize the hook functions better if they weren't doing any logging. regular expressions is to search text. If I wanted to find all occurrences of my name (Alan) across a large set of documents, I could use a search tool to find instances of Alan in the text. However, if I want to search for alternate spellings such as Allen and Allan at the same time, I could build a model using regular expressions to search for all three at the same time. For example, a search for Alan|Allan|Allen (the model) would find all instances of all three spellings of my first name. The model language of regular expressions also allows me to simplify (although some would argue) the model to (A|Al)l(a|e)n. [2] A model for the former pattern is in Listing 8-2 Listing 8-2: Regular Expression Model Configuration files also allow administrators to apply security and restriction policies that affect how applications run on various machines (We'll cover configuration files in 15) The name and location of the configuration file depends on the nature of the application For ASPNET pages and Web services, the file is named webconfig and is located in the root directory of the application You can also have other webconfig files located in child directories Child configuration files inherit the settings defined in configuration files located in parent directories For Windows Forms applications, the configuration file takes the name of the executable plus a config extension Such a file must be resident in the same folder as the main executable. In that case, not all the register values need to be copied Right now, DeadlockDetection just skips hooking a couple of DLLs that it knows about A mechanism for specifying on a program-by-program basis which DLLs to skip would be nifty Debugging War Story: Uncommitted Transactions with Pooled COM Objects The Battle My good friend Peter Ierardi told me about an interesting multithreading bug he encountered He was working on a large DCOM project that used a multithreaded DCOM service to coordinate database transactions The DCOM service managed the transactions by creating a pool of database-centric in-process COM objects, which were used to write data into and read data from his relational database management system (RDBMS) The component-to-component communication took place through Microsoft Message Queue Server (MSMQ) Even though there were explicit, transactional commits, the data didn't seem to be written to the database. The DCOM service would retry three to five times, and the data would finally appear, as if by magic Obviously, the excessive retries were taking a toll on the application's performance, and the fact that the data wasn't being written to the database was cause for alarm The Outcome After some heavy debugging sessions, Peter found that the DCOM service was performing the reads and writes on separate, nonsynchronized threads The read occurred before a separate instance of the database COM object had written the data This behavior wasn't evident during debugging sessions because the debugger was forcing the proper timing and synchronization He eventually uncovered the problem through appropriate labeling of object instances in the event log. Grammar models are great for creating test data. Let's say that you are testing Microsoft Windows Live Hotmail and want to send 10,000 e-mail messages covering a variety of different inputs (assume that you have ample test accounts and sufficient automation to accomplish this). The first thing you might do is create a model of the data you care about for the message. The model can look like Listing 8-3 and generate the data in Table 8-3: Listing 8-3: Grammar Model for E-Mail Fields Issuing Calls to the Web Service Once a client application is linked to the Web service, it simply creates a new instance of the proxy class and calls its methods Consider that calling into a Web service is a potentially lengthy operation that might take a few seconds to complete If you find that the method call is too long, go for an asynchronous call This book's sample files include a Windows Forms application that uses the Web service proxy to get data from the site Surprisingly enough, the code is nearly identical to the related application we built in 12 as a remoting client (See the following listing) The key difference is in the name of the class to call In addition, with a Web service you don't need to initialize the class in the form's Load event because the proxy class is statically linked to the project. The Lesson The big lesson Peter said he learned from this bug was that in a large-scale distributed application such as the one he was working on, you can't assume that the debug environment will accurately represent the release environment He solved the problem by adding appropriate synchronization code and wrapping the component-to-component communications, which originally went through MSMQ individually, into the same transaction along with the database writes such that the messages would be sent only upon transactional commits.. NorthwindSalesReportWebService service; service = new NorthwindSalesReportWebService(); string img = serviceGetSalesReportBarChart(theYear); 474 = =. What was happening in Peter's bug was that the MSMQ reads/writes, not surprisingly, were cycling much faster than the database reads/writes. Even though Peter and his team had walked through and planned all the multithreading carefully, they were still bitten by some initial misunderstanding about how much faster certain operations outside their project would take in the real world. Summary Multithreaded programming is difficult and the area in which you'll encounter some of the hardest bugs you'll ever have to solve. This chapter presented tips, techniques, and key points that should help you avoid deadlocks from the beginning of your project. As I stressed early in the chapter, in multithreaded programming, up-front planning is vital, and you must make sure to allot your team enough time and resources to plan multithreaded applications carefully and correctly. Once you're faced with the inevitable multithreaded deadlocks, however, there's no need to panic: this chapter also covered DeadlockDetection, a utility that will allow you to figure out which threads deadlocked on which synchronization object. Finally and I can't stress this point enough if you're doing multithreaded programming, you must be developing, running, and testing your projects on multiprocessor computers. If you're not, you probably shouldn't be doing multithreaded programming because you're leaving yourself open to some extremely serious bugs. <To> <Cc> <Bcc> <Subject> <Body> ::= ::= ::= ::= ::= <Valid <Valid <Valid <Empty <Empty Address | Invalid Address> Address | Invalid Address> Address | Invalid Address> | Not Empty> | Not Empty> vb.net adobe pdf reader component VB Helper: HowTo: Open a PDF file in an Adobe Reader control ...
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