WmpBitmapDecoder 建構函式

定義

命名空間:

System.Windows.Media.Imaging

組件:

PresentationCore.dll

初始化 WmpBitmapDecoder 的新執行個體。

多載

WmpBitmapDecoder(Stream, BitmapCreateOptions, BitmapCacheOption)	使用指定的 createOptions 和 cacheOption，從指定的檔案資料流初始化 WmpBitmapDecoder 的新執行個體。
WmpBitmapDecoder(Uri, BitmapCreateOptions, BitmapCacheOption)	使用指定的 createOptions 和 cacheOption，從指定的 WmpBitmapDecoder 初始化 Uri 的新執行個體。

WmpBitmapDecoder(Stream, BitmapCreateOptions, BitmapCacheOption)

使用指定的 createOptions 和 cacheOption，從指定的檔案資料流初始化 WmpBitmapDecoder 的新執行個體。

public:
 WmpBitmapDecoder(System::IO::Stream ^ bitmapStream, System::Windows::Media::Imaging::BitmapCreateOptions createOptions, System::Windows::Media::Imaging::BitmapCacheOption cacheOption);

[System.Security.SecurityCritical]
public WmpBitmapDecoder (System.IO.Stream bitmapStream, System.Windows.Media.Imaging.BitmapCreateOptions createOptions, System.Windows.Media.Imaging.BitmapCacheOption cacheOption);

public WmpBitmapDecoder (System.IO.Stream bitmapStream, System.Windows.Media.Imaging.BitmapCreateOptions createOptions, System.Windows.Media.Imaging.BitmapCacheOption cacheOption);

[<System.Security.SecurityCritical>]
new System.Windows.Media.Imaging.WmpBitmapDecoder : System.IO.Stream * System.Windows.Media.Imaging.BitmapCreateOptions * System.Windows.Media.Imaging.BitmapCacheOption -> System.Windows.Media.Imaging.WmpBitmapDecoder

new System.Windows.Media.Imaging.WmpBitmapDecoder : System.IO.Stream * System.Windows.Media.Imaging.BitmapCreateOptions * System.Windows.Media.Imaging.BitmapCacheOption -> System.Windows.Media.Imaging.WmpBitmapDecoder

Public Sub New (bitmapStream As Stream, createOptions As BitmapCreateOptions, cacheOption As BitmapCacheOption)

參數

bitmapStream

Stream

要解碼的點陣圖資料流。

createOptions

BitmapCreateOptions

點陣圖影像的初始化選項。

cacheOption

BitmapCacheOption

點陣圖影像的快取方法。

屬性

SecurityCriticalAttribute

例外狀況

ArgumentNullException

bitmapStream 值為 null。

FileFormatException

bitmapStream不是媒體相片編碼影像Windows。

範例

下列程式碼範例示範如何從檔案資料流程建立 和使用 WmpBitmapDecoder 的實例。 解碼的 Image 影像會當做控制項的來源使用。

// Open a Stream and decode a WDP image
Stream^ imageStreamSource = gcnew FileStream("tulipfarm.wdp", FileMode::Open, FileAccess::Read, FileShare::Read);
WmpBitmapDecoder^ decoder = gcnew WmpBitmapDecoder(imageStreamSource, BitmapCreateOptions::PreservePixelFormat, BitmapCacheOption::Default);
BitmapSource^ bitmapSource = decoder->Frames[0];

// Draw the Image
Image^ myImage = gcnew Image();
myImage->Source = bitmapSource;
myImage->Stretch = Stretch::None;
myImage->Margin = System::Windows::Thickness(20);

// Open a Stream and decode a WDP image
Stream imageStreamSource = new FileStream("tulipfarm.wdp", FileMode.Open, FileAccess.Read, FileShare.Read);
WmpBitmapDecoder decoder = new WmpBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
BitmapSource bitmapSource = decoder.Frames[0];

// Draw the Image
Image myImage = new Image();
myImage.Source = bitmapSource;
myImage.Stretch = Stretch.None;
myImage.Margin = new Thickness(20);

' Open a Stream and decode a WDP image
Dim imageStreamSource As New FileStream("tulipfarm.wdp", FileMode.Open, FileAccess.Read, FileShare.Read)
Dim decoder As New WmpBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default)
Dim bitmapSource As BitmapSource = decoder.Frames(0)

' Draw the Image
Dim myImage As New Image()
myImage.Source = bitmapSource
myImage.Stretch = Stretch.None
myImage.Margin = New Thickness(20)

備註

如果您想要在解碼器建立之後關閉 bitmapStream ，請使用快 OnLoad 取選項。 預設快 OnDemand 取選項會保留資料流程的存取權，直到需要點陣圖，並由垃圾收集行程處理清除為止。

WmpBitmapDecoder(Uri, BitmapCreateOptions, BitmapCacheOption)

使用指定的 createOptions 和 cacheOption，從指定的 WmpBitmapDecoder 初始化 Uri 的新執行個體。

public:
 WmpBitmapDecoder(Uri ^ bitmapUri, System::Windows::Media::Imaging::BitmapCreateOptions createOptions, System::Windows::Media::Imaging::BitmapCacheOption cacheOption);

[System.Security.SecurityCritical]
public WmpBitmapDecoder (Uri bitmapUri, System.Windows.Media.Imaging.BitmapCreateOptions createOptions, System.Windows.Media.Imaging.BitmapCacheOption cacheOption);

public WmpBitmapDecoder (Uri bitmapUri, System.Windows.Media.Imaging.BitmapCreateOptions createOptions, System.Windows.Media.Imaging.BitmapCacheOption cacheOption);

[<System.Security.SecurityCritical>]
new System.Windows.Media.Imaging.WmpBitmapDecoder : Uri * System.Windows.Media.Imaging.BitmapCreateOptions * System.Windows.Media.Imaging.BitmapCacheOption -> System.Windows.Media.Imaging.WmpBitmapDecoder

new System.Windows.Media.Imaging.WmpBitmapDecoder : Uri * System.Windows.Media.Imaging.BitmapCreateOptions * System.Windows.Media.Imaging.BitmapCacheOption -> System.Windows.Media.Imaging.WmpBitmapDecoder

Public Sub New (bitmapUri As Uri, createOptions As BitmapCreateOptions, cacheOption As BitmapCacheOption)

參數

bitmapUri

Uri

Uri，識別要解碼的點陣圖。

createOptions

BitmapCreateOptions

點陣圖影像的初始化選項。

cacheOption

BitmapCacheOption

點陣圖影像的快取方法。

屬性

SecurityCriticalAttribute

例外狀況

ArgumentNullException

bitmapUri 值為 null。

FileFormatException

bitmapUri不是媒體相片編碼影像Windows。

範例

下列程式碼範例示範如何建立 的實例，以及從 Uri 使用 WmpBitmapDecoder 。 解碼的 Image 影像會當做控制項的來源使用。

// Open a Uri and decode a WDP image
System::Uri^ myUri = gcnew System::Uri("tulipfarm.wdp", UriKind::RelativeOrAbsolute);
WmpBitmapDecoder^ decoder3 = gcnew WmpBitmapDecoder(myUri, BitmapCreateOptions::PreservePixelFormat, BitmapCacheOption::Default);
BitmapSource^ bitmapSource3 = decoder3->Frames[0];

// Draw the Image
Image^ myImage2 = gcnew Image();
myImage2->Source = bitmapSource3;
myImage2->Stretch = Stretch::None;
myImage2->Margin = System::Windows::Thickness(20);

// Open a Uri and decode a WDP image
Uri myUri = new Uri("tulipfarm.wdp", UriKind.RelativeOrAbsolute);
WmpBitmapDecoder decoder3 = new WmpBitmapDecoder(myUri, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
BitmapSource bitmapSource3 = decoder3.Frames[0];

// Draw the Image
Image myImage2 = new Image();
myImage2.Source = bitmapSource3;
myImage2.Stretch = Stretch.None;
myImage2.Margin = new Thickness(20);

' Open a Uri and decode a WDP image
Dim myUri As New Uri("tulipfarm.wdp", UriKind.RelativeOrAbsolute)
Dim decoder3 As New WmpBitmapDecoder(myUri, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default)
Dim bitmapSource3 As BitmapSource = decoder3.Frames(0)

' Draw the Image
Dim myImage2 As New Image()
myImage2.Source = bitmapSource3
myImage2.Stretch = Stretch.None
myImage2.Margin = New Thickness(20)