xaml
<Window x:Class="WpfApp5.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApp5"
mc:Ignorable="d"
Title="留言板" Height="240" Width="400" FontSize="15" MinHeight="200"
MinWidth="340" MaxHeight="400" MaxWidth="600" WindowStartupLocation="CenterScreen">
<Grid Margin="10">
<Grid.RowDefinitions>
<RowDefinition Height="25"/>
<RowDefinition Height="4"/>
<RowDefinition Height="*"/>
<RowDefinition Height="4"/>
<RowDefinition Height="25"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="80"/>
<ColumnDefinition Width="4"/>
<ColumnDefinition Width="80"/>
</Grid.ColumnDefinitions>
<TextBlock Text="请选择您的部门并留言:" Grid.Column="0" Grid.Row="0" VerticalAlignment="Center"/>
<ComboBox Grid.Column="1" Grid.Row="0" Grid.ColumnSpan="4"/>
<TextBox Grid.Column="0" Grid.Row="2" Grid.ColumnSpan="5" BorderBrush="Black"/>
<Button Content="提交" Grid.Column="2" Grid.Row="4"/>
<Button Content="清除" Grid.Column="4" Grid.Row="4"/>
<!--Button Grid.RowSpan="1" Content="btn1" Width="100" Height="50"/>
<Button Grid.ColumnSpan="2" Content="btn2" Width="100" Height="50"/>
<Button Grid.Column="3" Grid.Row="3" Content="btn3" Width="100" Height="50"/-->
</Grid>
</Window>