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app.config gelöscht. MainWindow mit Datenbank verbunden

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This commit is contained in:
Yongkang Zhang 2025-03-12 12:04:32 +01:00
parent 0105bf1025
commit fdf61b30df
3 changed files with 73 additions and 32 deletions
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55
PrototypWPFHAG/MainWindow.xaml
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@ -1,23 +1,32 @@
<mah:MetroWindow xmlns:mah="http://metro.mahapps.com/winfx/xaml/controls" x:Class="PrototypWPFHAG.MainWindow" <mah:MetroWindow xmlns:mah="http://metro.mahapps.com/winfx/xaml/controls"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" x:Class="PrototypWPFHAG.MainWindow"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:PrototypWPFHAG" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" xmlns:local="clr-namespace:PrototypWPFHAG"
Title="Prototype" mc:Ignorable="d"
Height="450" Title="Prototype"
Width="800" Height="450"
TitleCharacterCasing="Normal" Width="800"
WindowTitleBrush="Firebrick" TitleCharacterCasing="Normal"
Icon="pack://application:,,,/Images/databaseicon.png" WindowTitleBrush="Firebrick"
ResizeMode="CanResizeWithGrip"> Icon="pack://application:,,,/Images/databaseicon.png"
<Grid> ResizeMode="CanResizeWithGrip">
<Border BorderBrush="Firebrick" BorderThickness="3"> <Grid>
</Border> <Border BorderBrush="Firebrick" BorderThickness="3" Padding="20">
<StackPanel> <StackPanel VerticalAlignment="Center" HorizontalAlignment="Center">
<TextBlock Width="120" Margin="100" Background="AliceBlue"></TextBlock> <!-- 用户名标签和输入框 -->
<Button Height="25" Width="44" Content="Log in"/> <TextBlock Text="USERNAME" Margin="0,10,0,0" FontSize="14" FontWeight="Bold" />
</StackPanel> <TextBox Width="200" Height="30" Margin="0,5,0,0" x:Name="UsernameTextBox" />
</Grid>
</mah:MetroWindow> <!-- 密码标签和输入框 -->
<TextBlock Text="PASSWORD" Margin="0,10,0,0" FontSize="14" FontWeight="Bold" />
<PasswordBox Width="200" Height="30" Margin="0,5,0,0" x:Name="PasswordTextBox" />
<!-- 登录按钮 -->
<Button Height="30" Width="100" Content="Log in" Margin="0,20,0,0" Click="loginButton_Click" />
</StackPanel>
</Border>
</Grid>
</mah:MetroWindow>

43
PrototypWPFHAG/MainWindow.xaml.cs
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@ -23,10 +23,49 @@ public partial class MainWindow : MetroWindow
public MainWindow() public MainWindow()
{ {
InitializeComponent(); InitializeComponent();
// TestConnection();
// Console.ReadKey();
TestConnection(); }
Console.ReadKey();
private void loginButton_Click(object sender, RoutedEventArgs e)
{
// 从用户输入中获取用户名和密码
string username = UsernameTextBox.Text; // 获取用户名
string password = PasswordTextBox.Password; // 获取密码
// 调用 ValidateUser 方法验证用户凭据
if (ValidateUser(username, password))
{
MessageBox.Show("ok", "Login Successful", MessageBoxButton.OK, MessageBoxImage.Error);
}
else
{
// 如果验证失败，显示错误信息
MessageBox.Show("Invalid username or password.", "Login Failed", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
private bool ValidateUser(string username, string password)
{
// 获取数据库连接
using (var con = GetConnection())
{
con.Open(); // 打开数据库连接
string query = "SELECT COUNT(*) FROM USER WHERE UserName = @username AND Password = @password;";
using (var cmd = new NpgsqlCommand(query, con))
{
// 使用参数化查询防止 SQL 注入
cmd.Parameters.AddWithValue("@username", username);
cmd.Parameters.AddWithValue("@password", password);
// 执行查询并获取结果
int count = (int)cmd.ExecuteScalar();
return count > 0; // 如果匹配记录数量大于 0，返回 true
}
}
} }
private static void TestConnection() private static void TestConnection()

7
PrototypWPFHAG/app.config
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@ -1,7 +0,0 @@
<connectionStrings>
<add name="MyConnectionString"
providerName="Npgsql"
connectionString="Server=127.0.0.1;Port=7854;
Database=mydatabase;User Id=admin;Password=123456;" />
</connectionStrings>