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25 Mar 2013 ... How to write a PDF editor ? iText ® is a library that allows you to create and manipulate PDF ... iText is available in Java as well as in C# . Once we ve covered the LINQ to XML axis methods, we ll take a look at how the axis methods can be combined with the standard query operators and LINQ query expressions to provide the powerful querying capabilities that we ve come to expect from LINQ In addition to looking into the LINQ to XML axis methods and standard query operators, we ll also show how to query LINQ to XML objects using XPath Finally, we ll switch gears and examine how we can use LINQ to XML to transform XML into alternate formats In a perfect world, the XML data we receive would already be in the exact format that we require, but sadly that s rarely the case. edit pdf file using itextsharp c#: Manipulating an existing PDF document - iText edit pdf file using itextsharp c# The C# PDF Library | Iron PDF
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C# ASP.NET VB.NET library to generate edit and parse PDF files. Library converts PDF to multiple formats including DOC, DOCX, XLS, XLSX, PPTX HTML and ... In order for us to use XML, we often need to transform it into alternate XML formats or into a format that can be displayed to a user, such as HTML By combining the powerful query capabilities offered with LINQ to XML with functional construction and/or XML literals, we can transform XML documents into alternate formats quickly and easily.. word to pdf c# itextsharp: C# convert word byte array to pdf byte array - Microsoft Dynamics ... edit pdf c# programming - Editing existing pdf files using C# | DaniWeb
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NET imaging application; Able to separate one PDF file into two PDF documents using C#.NET programming code; Free to extract page(s) from source PDF file ... In the LINQ to Objects and LINQ to SQL sections of this book, you ve seen how the standard query operators allow a common set of query expressions to be used against objects as well as relational data. In this chapter, we ll show how the same standard query operators enable the querying of XML. Before we get to the standard query operators, we need to dive into the LINQ to XML axis methods, since they re the key to enabling the standard query operators to work against XML data. Let s get started. Both of these methods use the lock keyword to ensure that the changes to the calculation state variable are atomic, so your application does not encounter a race condition. Both methods fire a status changed event to inform the UI that the calculation is starting or stopping. The calculation method is defined as follows. Ch8DataContext context = new Ch8DataContext(); Author authorToChange = (context.Authors).First(); authorToChange.FirstName = "Jim"; authorToChange.LastName = "Wooley"; context.SubmitChanges(); This results in the following SQL: [dbo].[Author] [LastName] = @p2, [FirstName] = @p3 [dbo].[Author] ([ID] = @p0) AND ([TimeStamp] = @p1) [t1].[TimeStamp] Get updated timestamp [dbo].[Author] AS [t1] ((@@ROWCOUNT) > 0) AND ([t1].[ID] = @p4) c# create editable pdf Open, edit , save pdf file c# | The ASP.NET Forums
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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 ... private string Calculation( int count ) { string result = ""; for ( int i = 0 ; i < count ; i++ ) { // Long calculation // Check for cancel. if ( _calcState == CalculationStatus.CancelPending ) break; // Update Progress FireProgressChangedEvent( count, i ); } return result; } PS C:\> [void][System.Reflection.Assembly]::LoadWithPartialName('Microsoft .VisualBasic') In addition to changing the standard optimistic concurrency by setting all fields to check always or using a timestamp, there are a couple of other concurrency models available The first option is to simply ignore any concurrent changes and always update the records, allowing the last update to be accepted In that case, set UpdateCheck to Never for all properties Unless you can guarantee that concurrency is not an issue, this is not a recommended solution In most cases, it is best to inform the user that there was a conflict and provide options to remedy the situation In some cases, it is fine to allow two users to make changes to different columns in the same table For example, in wide tables, we may want to manage different sets of columns with different objects or contexts In this case, set the UpdateCheck attribute to WhenChanged rather than Always. This is not recommended in all cases, particularly when multiple fields contribute to a calculated total For example, in a typical OrderDetail table, columns may appear for quantity, price, and total price If a change was made in either the quantity or price, the total price will need to be changed If one user changes the quantity while another changes the price, the total price would not be modified properly This form of automatic merge concurrency management does have its place Business demands should dictate if it is appropriate in any given situation With LINQ to SQL, concurrency checking can be set on a field-level basis The framework was designed to provide the flexibility to allow for various customized implementations The default behavior is to fully support optimistic concurrency So far, we ve identified how to recognize when there is a conflict. The second part of the equation is what we do with the knowledge that there was a concurrency exception.. In using the Always or WhenChanged options for UpdateCheck, it is inevitable that two users will modify the same values and cause conflicts. In those cases, the DataContext will raise a ChangeConflictException when the second user issues c# create editable pdf C# tutorial: add content to an existing PDF document
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