WPF自定义窗口基类

WPF自定义窗口基类时，窗口基类只定义.cs文件，xaml文件不定义。继承自定义窗口的类xaml文件的根节点就不再是<Window>，
而是自定义窗口类名（若自定义窗口与继承者不在同一个命名空间，还得加上命名空间），继承自定义窗口类后台代码也得修改为继承自自定义窗口
exp:

//继承Window类的自定义窗口类
namespace WPF_Study.Entity
{
using System.Windows;

public class WindowBase:Window
{
private const int Fixed_Width = 540;
private const int Fixed_Height = 350;

public WindowBase() : base()
{
this.MaxWidth = Fixed_Width;
this.MaxHeight = Fixed_Height;
this.MinWidth = Fixed_Width;
this.MinHeight = Fixed_Height;
}
}
}

//继承自定义窗口
//xaml文件
<localEntity:WindowBase x:Class="WPF_Study.TestWindowBase"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:localEntity="clr-namespace:WPF_Study.Entity"
Title="TestWindowBase" >
<Grid>
<Grid.Resources>
<Style TargetType="{x:Type Button}">
<Setter Property="Width" Value="60"/>
<Setter Property="Height" Value="30"/>
<Setter Property="Margin" Value="5"/>
</Style>
</Grid.Resources>
<Grid.RowDefinitions>
<RowDefinition Height="40*"/>
<RowDefinition Height="221*"/>
</Grid.RowDefinitions>
<WrapPanel Grid.Row="0" Grid.Column="0">
<Button Content="查询" x:Name="btnSearch"></Button>
<Button Content="新增" x:Name="btnAdd"></Button>
<Button Content="修改" x:Name="btnAmend"></Button>
<Button Content="删除" x:Name="btnDelete"></Button>
</WrapPanel>
<DataGrid x:Name="dataGrid" AutoGenerateColumns="False" Grid.Row="2" Grid.Column="0" CanUserAddRows="False">
<DataGrid.Columns>
<DataGridTextColumn Header="窗口编号" Binding="{Binding Win}"/>
<DataGridTextColumn Header="评价器地址" Binding="{Binding Evalutor}"/>
<DataGridTextColumn Header="条屏地址" Binding="{Binding StripeScreen}"/>
<DataGridTextColumn Header="IP" Binding="{Binding IP}"/>
<DataGridTextColumn Header="注册设备号" Binding="{Binding RegNum}"/>
<DataGridTextColumn Header="描述" Binding="{Binding Description}" Width="*"/>
</DataGrid.Columns>
</DataGrid>
</Grid>
</localEntity:WindowBase>
//对应后台代码
using WPF_Study.Entity;

namespace WPF_Study
{
/// <summary>
/// Interaction logic for TestWindowBase.xaml
/// </summary>
public partial class TestWindowBase : WindowBase
{
public TestWindowBase()
{
InitializeComponent();
}
}
}