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C# Split and Merge files - YouTube
Apr 10, 2018 · ... LInk donwload: http://laptrinhvb.net/bai-viet/chuyen-de-csharp/---Csharp----Huong-dan ...Duration: 0:49 Posted: Apr 10, 2018

The SecurityPermission attribute and class both use a SecurityAction enumeration to determine the action you are requesting. Depending on your needs, you can demand (request) a permission, deny a permission, or assert that you have the permission. The examples that follow illustrate possible uses of these security actions. For all of these examples, assume that we need to call an unmanaged function that is implemented like this: //function for testing of security permissions int GetStringLength(char* aString) { //just return the length of the string return (int)strlen(aString); } We will develop three separate wrapper classes that call this function, each one illustrating a different security action. The first wrapper demands the UnmanagedCode permission and is implemented like this: [SecurityPermission(SecurityAction.Demand, Flags=SecurityPermissionFlag.UnmanagedCode)] class UnmanagedCallsAllowed { [DllImport("FlatAPILib.DLL")] private static extern int GetStringLength(string aString); /// <summary> /// Call the unmanaged function /// </summary> /// <param name="aString"></param> /// <returns></returns> public static int CallGetStringLength(string aString) { return GetStringLength(aString); } } The demand causes the .NET runtime to examine the permissions of all callers in the stack, verifying that the requested permission (UnmanagedCode) has been granted to each caller. If any caller in the stack does not have the permission, a SecurityException is thrown. The second wrapper asserts the UnmanagedCode permission: [SecurityPermission(SecurityAction.Assert, Flags=SecurityPermissionFlag.UnmanagedCode)] class UnmanagedCallsAsserted { [DllImport("FlatAPILib.DLL")] private static extern int GetStringLength(string aString); /// <summary> /// Call the unmanaged function /// </summary>

leave it up to the host computer to figure out that SHIFT has been depressed, but not yet released, at the time the next character is pressed. For example, consider the sequence of typing a lowercase letter a followed by an uppercase letter A. It s not just two codes sent from the keyboard, but is rather more complex and goes something like this: 1. 2. 3. You press the A key. The keyboard sends scancode 0x1C, which represents a make (keydown) event on the A key. You release the A key. The keyboard sends scancode 0xF01C, which represents a break (keyup) event on the A key. You depress the SHIFT key. The keyboard sends scancode 0x12 (if it s the left SHIFT key) or 0x59 (if it s the right SHIFT key) to represent a make event on SHIFT. You depress the A key. The keyboard sends scancode 0x1C (make on A). You release the A key. The keyboard sends scancode 0xF01C (break on A). You release the SHIFT key. They keyboard sends scancode 0xF012 (break on SHIFT).

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Windows Operate PDF files in C#—How to merge and split PDF files ...
Mar 1, 2018 · C# How to convert Excel to multiple formats file via free .NET library. ... In this sample, we will see how to merge multiple PDF files and split PDF file into multiple ones using a totally FREE 3rd party library Free Spire.PDF for .NET in C#. ... Controls, C#, ASP.NET, Class Library, How ...

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Split PDF file from C# / VB.NET applications - GemBox
Shows how to split PDF file with GemBox.Pdf in C# and VB.NET.

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