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C# Marshal.ZeroFreeGlobalAllocAnsi方法代码示例

本文整理汇总了C#中System.Runtime.InteropServices.Marshal.ZeroFreeGlobalAllocAnsi方法的典型用法代码示例。如果您正苦于以下问题:C# Marshal.ZeroFreeGlobalAllocAnsi方法的具体用法?C# Marshal.ZeroFreeGlobalAllocAnsi怎么用?C# Marshal.ZeroFreeGlobalAllocAnsi使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在System.Runtime.InteropServices.Marshal的用法示例。


在下文中一共展示了Marshal.ZeroFreeGlobalAllocAnsi方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: Main

//引入命名空间
using System;
using System.Runtime.InteropServices;
using System.Security;

class Example
{
    static void Main()
    {
        IntPtr unmanagedRef = IntPtr.Zero;

        // Ask the user for a password.
        Console.Write("Please enter your password: ");
        SecureString passWord = GetPassword();

        Console.WriteLine("Copying and decrypting the string to unmanaged memory...");
        // Copy the Secure string to unmanaged memory (and decrypt it).
        unmanagedRef = Marshal.SecureStringToGlobalAllocAnsi(passWord);
        passWord.Dispose();
        
        if (unmanagedRef != IntPtr.Zero) {
            Console.WriteLine("Zeroing out unmanaged memory...");
            Marshal.ZeroFreeGlobalAllocAnsi(unmanagedRef);
        }
        Console.WriteLine("Done.");
    }

    public static SecureString GetPassword()
    {
        SecureString password = new SecureString();

        // get the first character of the password
        ConsoleKeyInfo nextKey = Console.ReadKey(true);

        while (nextKey.Key != ConsoleKey.Enter) {
            if (nextKey.Key == ConsoleKey.Backspace) {
                if (password.Length > 0) {
                    password.RemoveAt(password.Length - 1);

                    // erase the last * as well
                    Console.Write(nextKey.KeyChar);
                    Console.Write(" ");
                    Console.Write(nextKey.KeyChar);
                }
            }
            else {
                password.AppendChar(nextKey.KeyChar);
                Console.Write("*");
            }

            nextKey = Console.ReadKey(true);
        }
        Console.WriteLine();

        // lock the password down
        password.MakeReadOnly();
        return password;
    }
}
开发者ID:.NET开发者,项目名称:System.Runtime.InteropServices,代码行数:59,代码来源:Marshal.ZeroFreeGlobalAllocAnsi

输出:

Please enter your password: ********
Copying and decrypting the string to unmanaged memory...
Zeroing out unmanaged memory...
Done.


注:本文中的System.Runtime.InteropServices.Marshal.ZeroFreeGlobalAllocAnsi方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。