利用闲暇时间帮一个亲戚做一个库存管理系统，由于是一个C/S应用，于是用WPF来做，也是第一次用WPF真正意义上的实践吧，下面是登录窗口相关代码：
<Window x:Class="David.WPF.Login"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="登录"
WindowStartupLocation="CenterScreen"
AllowsTransparency="True"
Background="Transparent"
WindowStyle="None"
ShowInTaskbar="False"
SizeToContent="WidthAndHeight"
FocusManager.FocusedElement="{Binding ElementName=txtUserName}">
<Window.Resources>
<Style TargetType="Label">
<Setter Property="Margin"
Value="4"></Setter>
</Style>
<Style TargetType="TextBox">
<Setter Property="Margin"
Value="4"></Setter>
<Setter Property="MinWidth"
Value="200"></Setter>
<Setter Property="HorizontalAlignment"
Value="Left"></Setter>
</Style>
<Style TargetType="PasswordBox">
<Setter Property="Margin"
Value="4"></Setter>
<Setter Property="MinWidth"
Value="200"></Setter>
<Setter Property="HorizontalAlignment"
Value="Left"></Setter>
</Style>
<Style TargetType="Button">
<Setter Property="Margin"
Value="6"></Setter>
<Setter Property="Padding"
Value="4"></Setter>
<Setter Property="MinWidth"
Value="50"></Setter>
</Style>
</Window.Resources>
<Border CornerRadius="10"
BorderBrush="Gray"
BorderThickness="3"
Background="Beige"
Margin="24"
Padding="4">
<Border.Effect>
<DropShadowEffect Color="Gray"
Opacity=".50"
ShadowDepth="16" />
</Border.Effect>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="60" />
<ColumnDefinition Width="100" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel Grid.Column="0"
Grid.Row="0"
Grid.RowSpan="4">
<Image x:Name="imgKey"
Margin="8"
Source="/David.WPF;component/skin/Key.jpg" Height="155">
<Image.Effect>
<DropShadowEffect Color="Gray"
Opacity=".50"
ShadowDepth="8" />
</Image.Effect>
</Image>
</StackPanel>
<Label Grid.Column="1"
Grid.Row="0"
Grid.ColumnSpan="2"
FontSize="18.667"
Margin="10,10,58,10" FontWeight="Bold" FontFamily="Microsoft YaHei" HorizontalAlignment="Center" VerticalAlignment="Center" Content="合肥佳诚物资库存管理系统V1.0" Foreground="#FFFF003A"/>
<Label Grid.Column="1"
Grid.Row="1" Margin="36,4,4,4" FontFamily="Microsoft YaHei" FontSize="13.333" FontWeight="Bold" Content="用户名 :"/>
<TextBox Grid.Column="2"
Grid.Row="1"
ToolTip="请输入用户名"
Name="txtUserName" Margin="4,4,0,4" Width="161.851" />
<Label Grid.Column="1"
Grid.Row="2" Margin="34,4,2,4" Content="密 码 :" FontSize="13.333" FontFamily="Microsoft YaHei" FontWeight="Bold"/>
<PasswordBox Grid.Column="2"
Grid.Row="2"
ToolTip="请输入密码"
Name="txtPassword" Margin="4,4,0,0" Width="161.851" />
<StackPanel Grid.Column="2"
Grid.Row="3"
Margin="10"
HorizontalAlignment="Center"
Orientation="Horizontal">
<Button Name="btnLogin"
IsDefault="True"
Content="登 录"
Click="btnLogin_Click" Foreground="#FF006E2A" FontFamily="Microsoft YaHei" FontWeight="Bold" Cursor="Hand">
<Button.Effect>
<DropShadowEffect Color="Gray"
Opacity=".50"
ShadowDepth="8" />
</Button.Effect>
</Button>
<Button x:Name="btnCancel"
IsCancel="True"
Content="退 出"
Click="btnCancel_Click" RenderTransformOrigin="2.64,0.164" Foreground="Red" FontFamily="Microsoft YaHei" FontWeight="Bold" Cursor="Hand">
<Button.Effect>
<DropShadowEffect Color="Gray"
Opacity=".50"
ShadowDepth="8" />
</Button.Effect>
</Button>
</StackPanel>
</Grid>
</Border>
</Window>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using Syit.Model;
using Syit.BLL;
using System.Data;
namespace David.WPF
{
/// <summary>
/// Login.xaml 的交互逻辑
/// </summary>
public partial class Login : Window
{
public Login()
{
InitializeComponent();
}
private void btnLogin_Click(object sender, RoutedEventArgs e)
{
string uname = this.txtUserName.Text.Trim();
string password = this.txtPassword.Password;
tb_UsersBLL bll = new tb_UsersBLL();
DataTable dt = bll.GetData(" UserName='" + uname + "'", "");
if (dt.Rows.Count > 0)
{
//用户名存在
if (dt.Rows[0]["UserPwd"].ToString().TrimEnd() == password)
{
//密码正确
MainWindow mw = new MainWindow(dt.Rows[0]["UserID"].ToString().TrimEnd());
this.Close();
mw.Show();
}
else
{
//密码不正确
MessagePopup.Show(this, "密码错误,请重新输入!",250);
}
}
else
{
//用户名不存在
MessagePopup.Show(this, "用户名不存在,请重新输入!", 250);
}
}
private void btnCancel_Click(object sender, RoutedEventArgs e)
{
//退出系统
this.Close();
Environment.Exit(0); //强制终止应用程序进程
}
}
}
这里使用了一个弹出提示窗口的操作类，调用方法是：
MessagePopup.Show(this, "用户名不存在,请重新输入!", 250);
该MessagePopup类代码如下：
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;
using System.Windows.Threading;
namespace David.WPF
{
public sealed class MessagePopup
{
public static void Show(UIElement parent, string message,double width)
{
parent.Dispatcher.Invoke(DispatcherPriority.Background, new Action(() =>
{
Popup popup = new Popup();
popup.StaysOpen = true;
popup.PlacementTarget = parent;
popup.Placement = PlacementMode.Center;
Border aroundBorder = new Border();
aroundBorder.BorderThickness = new Thickness(2);
aroundBorder.BorderBrush = Brushes.SteelBlue;
StackPanel aroundStackPanel = new StackPanel();
aroundStackPanel.MinWidth = width;
aroundStackPanel.MinHeight = 120;
aroundStackPanel.MaxWidth = 480;
aroundStackPanel.Background = Brushes.White;
aroundStackPanel.Orientation = Orientation.Vertical;
aroundStackPanel.FlowDirection = FlowDirection.LeftToRight;
DockPanel headDockPanel = new DockPanel();
headDockPanel.VerticalAlignment = VerticalAlignment.Top;
headDockPanel.Background = Brushes.SteelBlue;
TextBlock headTextBlock = new TextBlock();
headTextBlock.Margin = new Thickness(10, 0, 0, 0);
headTextBlock.Text = "提示";
headTextBlock.Height = 26;
headTextBlock.HorizontalAlignment = HorizontalAlignment.Left;
headTextBlock.VerticalAlignment = VerticalAlignment.Center;
headTextBlock.FontSize = 16;
headTextBlock.Focusable = false;
headTextBlock.IsHitTestVisible = false;
headTextBlock.Background = Brushes.SteelBlue;
headTextBlock.Foreground = Brushes.White;
TextBlock messageTextBlock = new TextBlock();
messageTextBlock.Text = message;
messageTextBlock.Margin = new Thickness(20, 20, 20, 10);
messageTextBlock.MinHeight = 28;
messageTextBlock.VerticalAlignment = VerticalAlignment.Top;
messageTextBlock.HorizontalAlignment = HorizontalAlignment.Left;
messageTextBlock.TextWrapping = TextWrapping.Wrap;
Button okButton = new Button();
okButton.Content = "OK";
okButton.Margin = new Thickness(0, 0, 20, 10);
okButton.Padding = new Thickness(25, 3, 25, 3);
okButton.HorizontalAlignment = HorizontalAlignment.Right;
okButton.Click += delegate
{
popup.IsOpen = false;
parent.IsEnabled = true;
};
headDockPanel.Children.Add(headTextBlock);
aroundStackPanel.Children.Add(headDockPanel);
aroundStackPanel.Children.Add(messageTextBlock);
aroundStackPanel.Children.Add(okButton);
aroundBorder.Child = aroundStackPanel;
popup.Child = aroundBorder;
parent.IsEnabled = false;
popup.IsOpen = true;
}));
}
}
}
