uwp之拍照（使用後置攝像頭）

參考:wp8.1之拍照（獲取焦點，使用後置攝像頭）

首先 xaml**：

<

grid 
background=""
>
<
grid
>
<
captureelement 
x:name
="capturepreview"
stretch
="uniformtofill"
/>
<
image 
name
="profilepic"
/>
grid
>
<
stackpanel 
verticalalignment
="bottom"
>
<
slider
x:name
="focusvalueslider"
margin
="12,0,15,0"
header
="焦點調節:"
largechange
="25"
maximum
="1000"
minimum
="0"
smallchange
="1"
valuechanged
="focusvalueslider_valuechanged"
value
="500"
/>
<
stackpanel 
orientation
="horizontal"
>
<
button 
click
="photographbutton_click"
content
="啟動攝像頭"
/>
<
button
margin
="50,0,0,0"
click
="capturephoto_click"
content
="拍照"
/>
stackpanel
>
stackpanel
>
grid
>

//

啟動攝像頭
async
private
void photographbutton_click(object
sender, routedeventargs e)
var settings = new
mediacaptureinitializationsettings
;await
capturemanager.initializeasync(settings);
//攝像頭旋轉90度
capturepreview.source =capturemanager;
await
capturemanager.startpreviewasync();}}
private
static
async taskfindcameradevicebypanelasync(windows.devices.enumeration.panel desired)
//拍照
async
private
void capturephoto_click(object
sender, routedeventargs e)
}private
void focusvalueslider_valuechanged(object
sender, rangebasevaluechangedeventargs e)
catch
}//設定攝像頭焦點方法
private
async
void setfocus(uint? focusvalue = null
)        
if(capturemanager.videodevicecontroller.focuscontrol.supported)
);await
capturemanager.videodevicecontroller.focuscontrol.focusasync();}}
catch
}

uwp之拍照（使用後置攝像頭）

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