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Now I have tree ideas to make a pdf reader :* The first is with use component of Adobe Reader,but the probleme is we need always An Adobe ... // A proper assertion that explicitly checks against what the value // is supposed to be void UpdateListEntries ( int nCount ) { ASSERT ( nCount > 0 ) ; } The incorrect sample essentially checks only whether nCount isn't 0, which is just half of the information that needs to be asserted By explicitly checking the acceptable values, you guarantee that your assertion is self-documenting, and you also ensure that your assertion catches corrupted data What to Assert Now that you're armed with an idea of how to assert, we can turn to exactly what you need to be asserting throughout your code If you haven't guessed from the examples I've presented so far, let me clarify that the first mandatory items to assert are the parameters coming into the method Asserting parameters is especially critical with module interfaces and class methods that others on your team call. visual basic read pdf: Pdf Reader in Vb . net - MSDN - Microsoft vb.net read pdf fields Displaying a PDF File in a VB . NET Form - ThoughtCo
7 Jul 2018 ... This Quick Tip shows you how to display a PDF with VB . NET . ... to create applications that can read and write PDF files without having to pay ... vb.net pdf read How to Read PDF document in Vb . net ????? - MSDN - Microsoft
Hello,. As Ashish Pandey pointed out that libraries such as iTextSharp are the best way to read PDF documents (see licensing) . You could ... One of the most unique roles at Microsoft is that of the Director of Test Excellence. In some ways, the role is simply to be the manager in charge of the Test Excellence team, but it also has a tremendous amount of scope and opportunity to influence testers across the entire company. Not surprisingly, it's a role that all three authors of this book have held. Currently, the Director of Test role is tied to the Director of Test Excellence role, but originally it was just a senior test position responsible for advancement of the testing profession at Microsoft. The following people have all held the Director of Test position: Dave Moore (Director of Development and Test), 1991 1994 vb.net print pdf file silently: VB . NET PDF Print Library: Print PDF documents ... - RasterEdge.com vb.net pdfreader class [ VB . NET ] Extract Pages and Split Pdf Files Using iTextSharp -VBForums
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8 Apr 2014 ... In this tutorial, we will create a program that read PDF file using an Acrobat software in vb . net . Now, let's start this tutorial! Because those gateway functions are the entry points into your code, you want to make sure that each parameter and assumption is valid As I pointed out in the debugging war story earlier in this chapter, "A Career-Limiting Move," assertions never take the place of normal error handling As you move inside your module, the parameters of the module's private methods might not require as much checking, depending mainly on where the parameters originated Much of the decision about which parameters to validate comes down to a judgment call It doesn't hurt to assert every parameter of every method, but if a parameter comes from outside the module, and if you fully asserted it once, you might not need to again By asserting each parameter on every function, however, you might catch some errors internal to your module I sit right in the middle of the two extremes. vb.net pdfreader class How to read PDF files in VB . net or convert PDF to word document in ...
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But you can also use Adobe reader or other application to open pdf file , The following code sets up a command that returns XML information about all the employees in the Northwind database: string nwind = "DATABASE=northwind;SERVER=localhost;UID=sa;"; string query = "SELECT * FROM Employees FOR XML AUTO, ELEMENTS"; SqlConnection conn = new SqlConnection(nwind); SqlCommand cmd = new SqlCommand(query, conn); In general, an ADONET command can be run using a variety of execute methods, including ExecuteNonQuery, ExecuteReader, and ExecuteScalar These methods differ in the format in which the result set is packed The SQL Server 2000 ad hoc command class SqlCommand supplies a fourth execute method, ExecuteXmlReader, which simply returns the result set as an XML reader You use the ExecuteXmlReader method as a special type of constructor for an XmlTextReader object, as shown here: connOpen(); XmlTextReader reader = (XmlTextReader) cmdExecuteXmlReader(); ProcessXmlData(reader); readerClose(); conn. Deciding how many parameter assertions are right for you just takes some experience As you get a feel for where you typically encounter problems in your code, you'll figure out where and when you need to assert parameters internal to your module One safeguard I've learned to use is to add parameter assertions whenever a bad parameter blows up my code That way, the mistake won't get repeated because the assertion will catch it Another area that's mandatory for assertions is method return values because the return values tell you whether methods succeeded or failed One of the biggest problems I see in debugging other developers' code is that they simply call methods without ever checking the return value. Roger Sherman (Director of Test), 1994 1997 James Tierney (Director of Test), 1997 2000 Barry Preppernau (Director of Test), 2000 2002 William Rollison (Director of Test), 2002 2004 Ken Johnston (Director of Test Excellence), 2004 2006 James Rodrigues (Director of Test Excellence), 2006 2007 Alan Page (Director of Test Excellence), 2007-present Because this is a full-time position managing a small strategy team the role also functions as the connection between the TLT and the TAG with an emphasis on working closely with the chairs of the two organizations. Close(); The ExecuteXmlReader method executes the command and returns an instance of an XmlTextReader object to access the result set Of course, ExecuteXmlReader fails, throwing an InvalidOperationException exception, if the command does not return an XML result 294. I have seen so many cases in which I've looked for a bug, only to find out that some method early on in the code failed but no one bothered to check its return value Of course, by the time you realize the culprit, the bug is manifested, so the program dies or corrupts data some 20 minutes later By asserting return values appropriately, you at least know about a problem when it happens Keep in mind that I'm not advocating asserting on every single possible failure Some failures are expected in code, and you should handle them appropriately Having an assertion fire each time a lookup in the database fails will likely drive everyone to disabling assertions in the project Be smart about it, and assert on return values when it's something 67. The Microsoft Test Leadership Team, Test Architect Group, and Test Excellence organizations fill a vital role in the development and maintenance of the test culture at Microsoft, as shown in Figure 16-2. In each of these organizations is a leadership position chartered to work for the discipline and across the teams. In the case of the TLT chair and the TAG chair, these are virtual teams and the chairmanship is an extra duty for the individual in that role. For the Director of Test Excellence it is a full-time position. serious Handling good data throughout your program should never cause an assertion to trigger Finally, I recommend that you use assertions when you need to check an assumption For example, if the specifications for a class require 3 MB of disk space, you should check this assumption with a conditional compilation assertion inside that class to ensure the callers are upholding their end of the deal Here's another example: if your code is supposed to access a database, you should have a check to see whether the required tables actually exist in the database That way you'll know immediately what's wrong instead of wondering why you're getting weird return values from other methods in the class In both of the preceding examples, as with most assumption assertions, you can't check the assumptions in a general assertion method or macro. The SqlCommand class performs no preliminary check on the structure of the T-SQL command being executed to statically determine whether the command returns XML data. This means that any error that invalidates the operation is detected on the server. A client-side check could verify that the command text incorporates a correct FOR XML clause prior to sending the text to the database. However, such a test would also catch as erroneous a perfectly legitimate situation: selecting XML data from a text or a BLOB field. So while performing a preliminary check could still make sense for some user applications, it would be ineffective if done from within the command class. Note Although the ExecuteXmlReader method returns a generic XmlReader object, the true type of the returned object is always XmlTextReader. You can use this object at will for example, to create a validating reader. Bear in mind, however, that the more you use the XML reader, the longer the connection stays open. In these situations, the conditional compilation technique that I indicated in the last paragraph should be part of your assertion toolkit Because the code executed in the conditional compilation works on live data, you must take extra precautions to ensure that you don't change the state of the program To avoid the serious problems that can be created by introducing code with side effects, I prefer to implement these types of assertions in separate methods, if possible By doing so, you avoid changing any local variables inside the original method Additionally, the conditionally compiled assertion methods can come in handy in the Watch window, as you'll see in 5 when we talk about the Microsoft Visual Studio NET debugger Listing 3-1 shows a conditionally compiled method that checks whether a table exists so that you'll get the assertion before you start any heavy access. Figure 16-2: Three key leadership positions in the three test support organizations. Lister and Tom DeMarco, Peopleware: Productive Projects and Teams (New York: Dorset House, 1987). Note that this test method assumes that you've already validated the connection string and can fully access the database AssertTableExists ensures the table exists so that you can validate this assumption instead of looking at an odd failure message from deep inside the bowels of your code Listing 3-1: AssertTableExists checks whether a table exists [Conditional("DEBUG")] static public void AssertTableExists ( string ConnStr , string TableName ) { SqlConnection Conn = new SqlConnection ( ConnStr ) ; StringBuilder sBuildCmd = new StringBuilder ( ) ; sBuildCmdAppend ( "select * from dbosysobjects where " ) ; sBuildCmdAppend ( "id = object_id('" ) ; sBuildCmdAppend ( TableName ) ; sBuildCmdAppend ( "')" ) ; // Make the command SqlCommand Cmd = new SqlCommand ( sBuildCmdToString ( ) , Conn ) ; try { // Open the database 68. read pdf file using itextsharp vb.net PDF Viewer SDK Control - Visual Studio Marketplace
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