c#wpf 登录界面代码

以下是一个简单的登录界面的 C# WPF 代码示例：

XAML 文件：

<Window x:Class="LoginApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Login" Height="250" Width="300">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <Label Grid.Row="0" Grid.Column="0" Content="Username:" Margin="5"/>
        <TextBox Grid.Row="0" Grid.Column="1" x:Name="txtUsername" Margin="5"/>
        <Label Grid.Row="1" Grid.Column="0" Content="Password:" Margin="5"/>
        <PasswordBox Grid.Row="1" Grid.Column="1" x:Name="txtPassword" Margin="5"/>
        <Button Grid.Row="2" Grid.Column="1" x:Name="btnLogin" Content="Login" Margin="5" Click="btnLogin_Click"/>
        <Label Grid.Row="3" Grid.Column="1" x:Name="lblStatus" Content="" Margin="5"/>
        <Button Grid.Row="4" Grid.Column="1" x:Name="btnRegister" Content="Register" Margin="5" Click="btnRegister_Click"/>
    </Grid>
</Window>

C# 代码文件：

using System.Windows;

namespace LoginApp
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void btnLogin_Click(object sender, RoutedEventArgs e)
        {
            string username = txtUsername.Text;
            string password = txtPassword.Password;

            // TODO: 在此处编写验证登录逻辑

            if (username == "admin" && password == "123456")
            {
                lblStatus.Content = "登录成功！";
            }
            else
            {
                lblStatus.Content = "用户名或密码不正确！";
            }
        }

        private void btnRegister_Click(object sender, RoutedEventArgs e)
        {
            // TODO: 在此处编写打开注册窗口的逻辑
        }
    }
}

这个示例登录界面包括用户名和密码输入框、登录按钮、注册按钮和状态标签。点击登录按钮将会进行简单的用户名和密码验证，如果验证通过，状态标签将会显示登录成功，否则将会显示用户名或密码不正确。点击注册按钮将会触发打开注册窗口的逻辑，你需要在相应的函数中实现。