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You can create test certificates through the makecert.exe command. This command creates a certificate in the personal store of the local machine: makecert -ss my -sr LocalMachine -n "CN=Mario, CN=Szpuszta" You have to import the System.Security.Cryptography.X509Certificates namespace when using the classes shown previously. As soon as you have the certificate from the store in place, you can use it when sending requests through SSL to a server that requires certificate authentication, as follows: ' Now create the web request Dim Request As HttpWebRequest = CType(WebRequest.Create(url), HttpWebRequest) Request.ClientCertificates.Add(Certificate) Dim Response As HttpWebResponse = CType(Request.GetResponse(), HttpWebResponse) ' ... Another useful example of security is a class for generating cryptographically strong random numbers. This class is important for generating random key values or salt values when you want to store salted password hashes. A salted password hash is a hash created from a password and a so-called salt. A salt is a random value. This ensures that even if two users select the same passwords, the results stored in the back-end store will look different, as the random salt value is hashed with the password. It also requires you to store the salt value in a separate field together with the password, because you c# pdf editor How to replace specific word in pdf using itextsharp C#.net ...
Close(); } } catch (Exception ex) { } } //Create a PDF from existing and with a template private void CreatePDFTemplateMSnew(string strSource) ... how to edit pdf file in asp.net c# Create, Read, Fill, Update, Delete Pdf Form Fields in C#.NET - Fill ...
C# demo to guide how to create and insert form fields to pdf, read Pdf form fields data, fill and update form fields data in C# language. The point of this chapter was to demystify the garbage collection process. As you have seen, the garbage collector will only run when it is unable to acquire the necessary memory from the managed heap (or when a given AppDomain unloads from memory). When a collection does occur, you can rest assured that Microsoft s collection algorithm has been optimized by the use of object generations, secondary threads for the purpose of object finalization, and a managed heap dedicated to hosting large objects. This chapter also illustrated how to programmatically interact with the garbage collector using the System.GC class type. As mentioned, the only time you will really need to do so is when you are building finalizable or disposable class types that operate on unmanaged resources. convert excel to pdf using c# windows application, convert pdf to tiff using ghostscript c#, pdf to tiff converter c#, winforms ean 13 reader, vb.net qr code reader free, convert pdf to word c# code itextsharp edit existing pdf 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 ... will need it for password validation. You will learn more about salted hash values when creating a custom membership provider in 26. For now, this shows how you can create random number values with the System.Security.Cryptography.RandomNumberGenerator class: Dim RandomValue As New Byte(15) {} Dim RndGen As RandomNumberGenerator = RandomNumberGenerator.Create() RndGen.GetBytes(RandomValue) ResultLabel.Text = Convert.ToBase64String(RandomValue) For more information about the random number generator, refer to the Cryptographic Service Provider documentation of Windows, as this class is just a wrapper around the native implementation (http://msdn.microsoft.com/library/default.asp url=/library/en-us/seccrypto/security/ cryptographic_service_providers.asp). how to edit pdf file in asp net c# Create pdf adding images and changing font on pdf c# itextsharp ...
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As already mentioned in comments: What you essentially need is a SimpleTextExtractionStrategy replacement which not only returns text but ... Recall that finalizable types are classes that have overridden the virtual System.Object.Finalize() method to clean up unmanaged resources at the time of garbage collection. Disposable objects, on the other hand, are classes (or structures) that implement the IDisposable interface, which should be called by the object user when it is finished using said object. Finally, you learned about an official disposal pattern that blends both approaches. We wrapped up this chapter with a look at a new .NET 4.0 generic class named Lazy<>. As you have seen, you can use this class to delay the creation of an expensive (in terms of memory consumption) object until the caller actually requires it. By doing so, you can help reduce the number of objects stored on the managed heap, and therefore ease the stress on the runtime garbage collector. Before you can perform cryptography in NET, you need to understand a little more about the underlying plumbing The NET encryption classes are divided into three layers The first layer is a set of abstract base classes; these classes represent an encryption task These include the following: AsymmetricAlgorithm: This class represents asymmetric encryption, which uses a public/private key pair Data encrypted with one key can be decrypted only with the other key SymmetricAlgorithm: This class represents symmetric encryption, which uses a shared secret value Data encrypted with the key can be decrypted using only the same key HashAlgorithm: This class represents hash generation and verification Hashes are also known as one-way encryption algorithms, as you can only encrypt but not decrypt data You can use hashes to ensure that data is not tampered with The second level includes classes that represent a specific encryption algorithm. Finally, the NetMsmqBinding and MsmqIntegrationBinding bindings are of immediate interest if you want to integrate with a Microsoft MSMQ server. This chapter will not examine the details of using MSMQ bindings, but Table 25-5 documents the basic role of each. Table 25-5. The MSMQ-Centric WCF Bindings c# pdf editor C# PDF Library SDK to view, edit, convert, process PDF file for C# ...
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