问题描述
这是页面的代码：<Windowx:Class="WpfApplication2.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:my="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"Loaded="WindowLoaded"Title="MainWindow"Height="350"Width="525"><Grid><my:WindowsFormsHostMargin="2"x:Name="TocControlHost"/><my:WindowsFormsHostGrid.Column="1"x:Name="MapControlHost"Margin="308,6,299,33"><my:WindowsFormsHostx:Name="ToolControlHost"Margin="2"/></Grid></Window>后台代码：AxMapControlmapControl;AxToolbarControltoolbarControl;AxTOCControltocControl;publicMainWindow(){InitializeComponent();CreateEngineControls();}privatevoidCreateEngineControls(){mapControl=newAxMapControl();this.MapControlHost.Child=mapControl;}this.MapControlHost.Child=mapControl;这句提MapControlHost不存在，可是在上面的代码中我已经定义了啊，求各位帮我解答。