WPF调用Winform控件实现主要分三步：

WPF调用Winform控件

1、添加两个引用：

WindowsFormsIntegration（负责整合WPF和Windows）
System.Windows.Forms

2、在 XAML文件中添加两个引用： 

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xmlns:wfi = "clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
xmlns:wf = "clr-namespace:System.Windows.Forms; assembly = System.Windows.Forms"

3、在XAML编码区实现你想添加的控件：

添加DataGridView控件： 

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< wfi:WindowsFormsHost> 
< !-- Set some properties on 
Windows Forms control in Xaml --> 
< wf:DataGridView x:Name=
"dataGridView" Dock="Fill" 
SelectionMode="FullRowSelect"/> 
< /wfi:WindowsFormsHost>

添加 NumericUpDown控件： 

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< Grid Height="0" Margin=
"146,0,0,116" MinHeight="20" 
MinWidth="20" Name="grid1" 
VerticalAlignment="Bottom" 
HorizontalAlignment="Left" 
Width="50"> 
< wfi:WindowsFormsHost> 
< wf:NumericUpDown x:Name=
"nupCounter" Maximum="100">
< /wf:NumericUpDown> 
< /wfi:WindowsFormsHost> 
< /Grid>