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Simply integrate into Visual C# project, supporting easy deployment and distribution in .NET Framework 2.0 above. Able to edit PDF document high-efficiently in ... select new { Publisher = publisher.Name, TotalPrice = books.TotalPrice() }; We re likely to use the same kind of join clause in every query each time we want to access a publisher s books. It could be useful to create a utility query operator to perform this operation. The operator in listing 12.5 selects a publisher s books from a sequence of books. Listing 12.5 Books custom query operator (CustomQueryOperators.cs) Dim myFile As StreamReader myFile = New StreamReader("C:\\ReadMe.Txt") Try String contents = myFile.ReadToEnd() '... use the contents of the file Finally myFile.Close() End Try pdf editor in c#: ASP.NET PDF Text Edit Control: online edit PDF text content using ... pdf xchange editor c# Free .NET PDF Library - Visual Studio Marketplace
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Hi All, I have a windows application in which am displaying the PDF file in PDF viewer(Adobe Acrobat or Via WebBrowser control). I have EDIT ... static public IEnumerable<Book> Books(this Publisher publisher, IEnumerable<Book> books) { return books.Where(book => book.Publisher == publisher); } This new Books operator can be used to simplify our previous query expression as follows: You can accept one kind of information through the pipeline. This might be computer names, processes, or any other single kind of information. Whatever you accept through the pipeline can come as a single object, or multiple objects can be piped in. You ll write one (or many) commands that execute against each piped-in object, no matter how many there are. You can designate additional parameters for other input elements. The values provided to these parameters will be used for each execution of your commands. from publisher in SampleData.Publishers select new { Publisher = publisher.Name, TotalPrice = publisher.Books(SampleData.Books).TotalPrice() }; docx to pdf c#: Free .NET Word API - CodePlex Archive edit pdf c# C# tutorial: add content to an existing PDF document
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That's not how PDF files work. All of the calculations that take place in the layout stage are done and finalised (this sets PDF apart from ... Note: In C# and C++, Finalize methods are implemented as destructors. In Visual Basic .NET, the Finalize method is implemented as an override of the Finalize subroutine on the Object base class. Of course this operator can be reused in other queries as well, which makes it easy to filter books by publisher. This is also an interesting example of what should be avoided! The code that uses the join clause and not our Books operator will be more efficient in most cases because it uses the GroupJoin operator behind the scenes. GroupJoin is optimized to join sequences, and in our case it will loop on books only once to find their publisher. The version of the code that uses our Books operator will loop on the collection of books for each publisher. This example should help you to understand that while it s easy to create new query operators, it s not always the most efficient option. The choice is yours. Always consider the implications. Before we move on to other kinds of extensibility, let s consider one more example of a domain-specific query operator. c# edit pdf The C# PDF Library | Iron PDF
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No information is available for this page. · Learn why Book.IsExpensive The last operator in this section will show you how query operators can be used to code a specific concept only once. The sample operator in listing 12.6 takes a book as a parameter and returns whether or not it is expensive. Provide Finalize and Dispose methods if you hold unmanaged resources across client calls. If you create an object that accesses unmanaged resources in public or protected method calls, then the application needs to control the lifetime of the unmanaged resources. In Figure 8.1, the first case is a call to unmanaged resources where the resource is opened, fetched, and closed. In this case, your object does not need to provide Finalize and Dispose methods. In the second case, the unmanaged resource is held across method calls; therefore, your object should provide Finalize and Dispose methods so that the client can explicitly release the resource as soon as the client has finished using the object. Listing 12.6 IsExpensive custom query operator (CustomQueryOperators.cs) public static Boolean IsExpensive(this Book book) { if (book == null) throw new ArgumentNullException("book"); return (book.Price > 50) || ((book.Price / book.PageCount) > 0.10M); } That ll all probably make more sense with an example. We ll start with the same function in listing 19.5, but I ll dress it up slightly to make it a filtering function, shown next. The IsExpensive operator defined in the listing can be used in LINQ queries each time we need to know whether a book is expensive. Here is a sample query that uses this operator: Don t provide Finalize & Dispose Client GetData() Opens connection Fetches data from unmanaged resource Closes connection pdf xchange editor c# Free .NET PDF Library - Visual Studio Marketplace
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