C#如何从PasswordBox获取文本值

在C#中，要从PasswordBox获取文本值，我们可以使用PasswordBox的Password属性。PasswordBox是一种用于输入密码的控件，它会将用户输入的密码隐藏以保护用户的隐私。

csharp
using System;
using System.Security;
class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("请输入密码：");
        PasswordBox passwordBox = new PasswordBox();
        string password = GetPassword(passwordBox);
        Console.WriteLine("您输入的密码是：" + password);
    }
    static string GetPassword(PasswordBox passwordBox)
    {
        SecureString securePassword = passwordBox.Password;
        IntPtr passwordPtr = IntPtr.Zero;
        string password = "";
        try
        {
            passwordPtr = System.Runtime.InteropServices.Marshal.SecureStringToBSTR(securePassword);
            password = System.Runtime.InteropServices.Marshal.PtrToStringBSTR(passwordPtr);
        }
        finally
        {
            if (passwordPtr != IntPtr.Zero)
            {
                System.Runtime.InteropServices.Marshal.ZeroFreeBSTR(passwordPtr);
            }
        }
        return password;
    }
}