如何在嵌入式Silverlight中定位矩形？

我想在Canvas上定位Rectangle，但無法弄清楚正確的語法是做什麼的。在C＃中，我會寫如何在嵌入式Silverlight中定位矩形？

rect = new Rectangle(); 
     rect.Width = 100D; 
     rect.Height = 50D; 
     rect.Fill = new SolidColorBrush(Colors.Red); 
     rect.StrokeThickness = 2; 
     rect.Stroke = new SolidColorBrush(Colors.Black); 

     Canvas.SetLeft(rect,5); 
     Canvas.SetTop(rect,5); 
     DrawCanvas.Children.Add(rect);

我嘗試使用嵌入的代碼做同樣的事情，但在定位Rectangle時遇到了問題。在嵌入式Silverlight中以編程方式創建和定位Canvas上的形狀的正確方法是什麼？這是我迄今爲止所做的，但是在運行它時Canvas上沒有任何內容顯示。

HRESULT MainPage::BtnOk_Click (IXRDependencyObject* pSender, XRMouseButtonEventArgs* ? pArgs) 
{ 
HRESULT hr = E_NOTIMPL; 

if ((NULL == pSender) || (NULL == pArgs)) 
{ 
    hr = E_INVALIDARG; 
} 

IXRApplicationPtr pApplication; 
if (FAILED(hr = App::GetApplication(&pApplication))) 
    return hr; 

IXRVisualHostPtr pVisualHost; 
if (FAILED(hr = App::GetVisualHost(&pVisualHost))) 
    return hr; 

//Create Brush 
IXRSolidColorBrushPtr pPaintBrushRed; 
IXRSolidColorBrushPtr pPaintBrushBlack; 

COLORREF brushColorRed = RGB(255,0,0); 
COLORREF brushColorBlack = RGB(0,0,0); 

pApplication->CreateObject(&pPaintBrushRed); 
pPaintBrushRed->SetColor(brushColorRed); 

pApplication->CreateObject(&pPaintBrushBlack); 
pPaintBrushBlack->SetColor(brushColorBlack); 


IXRRectanglePtr pRectangle; 
IXRFrameworkElementPtr pRootElement; 
IXRCanvasPtr pCanvasPanel; 
IXRUIElementCollectionPtr pChildrenCollection; 

pApplication->CreateObject(IID_IXRRectangle, &pRectangle); 
pRectangle->SetWidth(100); 
pRectangle->SetHeight(50); 
pRectangle->SetFill(pPaintBrushRed); 
pRectangle->SetStroke(pPaintBrushBlack); 
pRectangle->SetStrokeThickness(2); 
pRectangle->SetName(TEXT("MyRect")); 


pVisualHost->GetRootElement(&pRootElement); 
pRootElement->FindName(TEXT("DrawCanvas"), &pCanvasPanel); 

pCanvasPanel->GetChildren(&pChildrenCollection); 
pChildrenCollection->Add(pRectangle, NULL); 
pCanvasPanel->SetAttachedProperty(L"MyRect.Left",NULL,5); 
pCanvasPanel->SetAttachedProperty(L"MyRect.Top",NULL,5); 



/*rect = new Rectangle(); 
     rect.Width = 100D; 
     rect.Height = 50D; 
     rect.Fill = new SolidColorBrush(Colors.Red); 
     rect.StrokeThickness = 2; 
     rect.Stroke = new SolidColorBrush(Colors.Black); 

     Canvas.SetLeft(rect,5); 
     Canvas.SetTop(rect,5); 
     DrawCanvas.Children.Add(rect);*/ 
return hr; 
}

的XAML代碼：

<UserControl 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:local="clr-namespace:ChartApplication" 
x:Class="ChartApplication.MainPage" 
Width="640" Height="480"> 

<Grid x:Name="LayoutRoot" Background="White"> 
    <local:ChartControl Margin="97,58,82,89"/> 
    <Rectangle Fill="#FFE25E5E" Stroke="Black" Height="133" Margin="97,98,0,0" VerticalAlignment="Top" HorizontalAlignment="Left" Width="217"/> 
    <Ellipse Fill="#FFB7E25E" Stroke="Black" Height="105" HorizontalAlignment="Right" Margin="0,0,41,78" VerticalAlignment="Bottom" Width="235"/> 
    <Button x:Name="BtnOk" Height="85" HorizontalAlignment="Left" Margin="113,0,0,89" VerticalAlignment="Bottom" Width="155" Content="Ok" Click="BtnOk_Click"/> 
    <Canvas x:Name="DrawCanvas" HorizontalAlignment="Right" Margin="0,98,41,198" Width="240" Background="#FFE4E4F2"/> 

</Grid>

來源

2012-03-23 JohnCambell

畫布可能不會在嵌入式Silverlight的支持。您可以直接添加到電網

IXRUIElementCollectionPtr pElementCollection; 
m_pLayoutRoot->GetChildren(&pElementCollection); 
int nIndex=0; 
pChildrenCollection->Add(pRectangle, &nIndex); 
nIndex++;

來源

2012-07-03 16:12:54 Ram

如何在嵌入式Silverlight中定位矩形？

回答

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