登陆界面Login

最终界面：

XMAL 代码：

  <Grid >
            <Grid.RowDefinitions>
                <RowDefinition />
                <RowDefinition />
            </Grid.RowDefinitions>
            <Image Source="Image\AiMeiLi.jpg"  Margin="5"/>
            <Grid Grid.Row="1">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition  Width="Auto"/>
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions >
                    <RowDefinition />
                    <RowDefinition />
                    <RowDefinition />
                </Grid.RowDefinitions>
                <TextBlock Text="用户名" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="2"/>
                <TextBox  Grid.Column="1"  VerticalAlignment="Center" Name="tbxLoginName"  Margin="2"/>
                <TextBlock Text="密码"  Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="2"/>
                <PasswordBox   Grid.Column="1" Grid.Row="1"  VerticalAlignment="Center"  Name="tbxLoginPasswords"  Margin="2"  />
                <StackPanel Grid.Row="2" Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Right"  >
                    <Button Content="登陆" Name="btnLogin" Margin="2" Click="btnLogin_Click" />
                    <Button  Content="取消"  Name="btnCancle" Margin="2" Click="btnCancle_Click" />
                </StackPanel>
            </Grid>
        </Grid>

后台代码：

private void btnLogin_Click(object sender, RoutedEventArgs e)
        {
            using (OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\AiMeiLi.accdb"))
           {
                string sqlText = @"select count(*) from [User] where UserName='" + tbxLoginName.Text + "' and UserPasswords='" + tbxLoginPasswords.Password + "'";
                using (OleDbCommand cmd=new OleDbCommand (sqlText, conn))
                {
                    if (conn.State == System.Data.ConnectionState.Closed)
                    {
                        conn.Open();
                    }
                    int n=System.Convert.ToInt32( cmd.ExecuteScalar());
                    if (n > )
                    {
                        MainWindow mainW = new MainWindow();
                        mainW.Show();
                        this.Close();
                    }
                    else
                    {
                        MessageBox.Show("用户名或密码错");
                    }
                }
           }
        }

        private void btnCancle_Click(object sender, RoutedEventArgs e)
        {
            Application.Current.Shutdown();
        }

数据库：access 数据库

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" 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