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creating a pdf editor like application in c# - Stack Overflow
This may get handy,. How to write a PDF editor? iText ® is a library that allows you to create and manipulate PDF documents. It enables ...

If you re interested in keeping your element around but removing all of its content, you can use the Value property. To delete the content of the author element ( Steve Eichert ) in the following XML:

books.Element("book").Element("author").Value = String.Empty;

Which results in the following XML:

public enum CalculationStatus { NotCalculating, Calculating, CancelPending }



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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 ...

Several of the methods mentioned in this section can also be used to update XML. We explore their use within that context next. Before moving on, let s take a deep breath. We ve been covering a lot of ground and realize that you may be getting tired. Luckily we only have two more sections before we re finished with our introduction to the LINQ to XML API. Let s move on to take a look at how we can update XML content using LINQ to XML.

direct approach is to use the SetElementValue method defined on XElement. SetElementValue allows simple content of child elements to be replaced. Let s replace Steve Eichert as the author of this book with someone a little more prominent. Let s first take a look at the XML we ll be updating.





edit pdf file using itextsharp c#

PDF Editor to Edit PDF files in ASP.NET Application - YouTube
Jun 24, 2014 · PDF Editor Application to edit the PDF files online using Aspose.Pdf for .NET. Complete ...Duration: 4:27 Posted: Jun 24, 2014

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PowerShell has two other key security measures that are in effect at all times, and that should not be modified. First, the .PS1 filename extension (which is what the shell uses to identify PowerShell scripts) isn t considered an executable file type by Windows. Double-clicking a .PS1 file will normally open it in Notepad for editing, rather than attempting to execute it. This configuration is intended to help prevent users from unknowingly executing a script, even if the execution policy would allow it. Second, you can t run a script within the shell by simply typing its name. The shell never searches the current directory for scripts, so if you have a script named test.ps1, simply changing to its folder and typing test or test.ps1 won t run the script. Here s an example:

To update the <author/> element, we navigate to the first book element using the Element axis method. Once we re positioned on the <book/> element, we call SetElementValue and pass the name of the element that we want to update (author), as well as the new value.

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The Task class provides two events: one to inform the UI about calculation status events, and the other to inform the UI about calculation progress. The delegate signatures are defined as well as the events themselves. The two events are fired in the helper methods. These methods check the type of the target; if the target s type is derived from the Control class, they fire the events by using the Invoke method on the control class. Therefore, for UI event sinks, the event is guaranteed to be called on the UI thread. The following example shows the code for firing the event.

XElement books = new XElement("books.xml"); books.Element("book").SetElementValue("author", "Bill Gates");

After calling SetElementValue, the value of the author element has been updated to Bill Gates:

It s important to remember that SetElementValue only supports simple content. If we try to pass more advanced content, SetElementValue will attempt to convert the content to a string using the GetStringValue method on XContainer. For example, if we update our code to pass an XElement as the value for our author element instead of the string, like so:

books.Element("book").SetElementValue("author", new XElement("foo"));

private void FireStatusChangedEvent( CalculationStatus status ) { if( CalculationStatusChanged != null ) { CalculationEventArgs args = new CalculationEventArgs( status ); if ( CalculationStatusChanged.Target is System.Windows.Forms.Control ) { Control targetForm = CalculationStatusChanged.Target as System.Windows.Forms.Control; targetForm.Invoke( CalculationStatusChanged, new object[] { this, args } ); } else { CalculationStatusChanged( this, args ); } } }

we ll end up with an exception being thrown by XContainer, since it does not accept anything that inherits from XObject to be used as content. To handle more complex content, the ReplaceNodes method that is defined on XContainer should be used. ReplaceNodes supports passing in all different types of content and provides overloads for passing in a variable number of content items. If we update our code to use ReplaceNodes instead of SetElementValue, we end up with the results we re after. The following code:

books.Element("book").Element("author").ReplaceNodes(new XElement("foo"));

c# create editable pdf

Editing pdf in C#.net - C# Corner
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