<Window x:Class="login.MainWindow"

         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

         Title="MainWindow" Height="200" Width="400">

     <Grid>

         <Grid.RowDefinitions>

             <RowDefinition></RowDefinition>

             <RowDefinition></RowDefinition>

             <RowDefinition></RowDefinition>

         </Grid.RowDefinitions>

         <Grid.ColumnDefinitions>

             <ColumnDefinition></ColumnDefinition>

             <ColumnDefinition></ColumnDefinition>

         </Grid.ColumnDefinitions>

         <!--默认在第0行0列-->

         <!--HorizontalAlignment:水平方向对齐   VerticalAlignment：垂直方向对齐-->

         <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Text="username:"></TextBlock>

         <TextBox Grid.Column="1" Name="uid" Margin="5"></TextBox>

         <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Text="password:" Grid.Row="1"></TextBlock>

         <PasswordBox Grid.Column="1" Name="pwd"   Margin="5" Grid.Row="1"></PasswordBox>

         <Button Content="login" Grid.Row="2" Margin="10" Click="Button_Click_1"></Button>

         <Button Content="cancer" Grid.Row="2" Margin="10" Grid.Column="1"></Button>

     </Grid>

 </Window>

 <Window x:Class="toolbar.MainWindow"

         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

         Title="MainWindow" Height="350" Width="525">

     <Grid>

         <DockPanel>

             <Menu DockPanel.Dock="Top">

                 <MenuItem Header="打开">

                     <MenuItem Header="删除"></MenuItem>

                 </MenuItem>

                 <MenuItem Header="编辑"></MenuItem>

             </Menu>

             <ToolBar DockPanel.Dock="Top">

                 <Button>

                     <Button.Content>

                         <Image Source="s.png" Width="16"></Image>

                     </Button.Content>

                 </Button>

                 <Button>

                     <Button.Content>

                         <Image Source="c.png" Width="16"></Image>

                     </Button.Content>

                 </Button>

                 <CheckBox>

                     <Image Source="cc.png"  Width="16"></Image>

                 </CheckBox>

             </ToolBar>

             <TextBox DockPanel.Dock="Bottom"></TextBox>

         </DockPanel>

     </Grid>

 </Window>