WmpBitmapDecoder 建構函式

定義

命名空間:: System.Windows.Media.Imaging

組件:: PresentationCore.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

初始化 WmpBitmapDecoder 的新執行個體。

多載

名稱	Description
WmpBitmapDecoder(Stream, BitmapCreateOptions, BitmapCacheOption)	從指定的檔案串流中初始化一個 WmpBitmapDecoder 新的實例，並具有指定的 `createOptions` 和 `cacheOption`。
WmpBitmapDecoder(Uri, BitmapCreateOptions, BitmapCacheOption)	從指定WmpBitmapDecoder中初始化一個新的實Uri例，並指定為 `createOptionscacheOption`和。

WmpBitmapDecoder(Stream, BitmapCreateOptions, BitmapCacheOption)

從指定的檔案串流中初始化一個 WmpBitmapDecoder 新的實例，並具有指定的 createOptions 和 cacheOption。

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

要解碼的點陣圖串流。

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 值是 null。

FileFormatException

bitmapStream 並非 Windows Media 照片編碼的影像。

範例

以下程式碼範例示範如何從檔案串流建立並使用 a WmpBitmapDecoder 實例。解碼後的影像作為控制的來源 Image 。


// 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

如果你想在解碼器建立後關閉快OnLoad取，可以使用bitmapStream快取選項。預設 OnDemand 快取選項保留對串流的存取權，直到需要位圖，且垃圾回收器負責清理。

適用於

WmpBitmapDecoder(Uri, BitmapCreateOptions, BitmapCacheOption)

從指定WmpBitmapDecoder中初始化一個新的實Uri例，並指定為 createOptionscacheOption和。

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

那 Uri 個用來識別要解碼的位圖。

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 值是 null。

FileFormatException

bitmapUri 並非 Windows Media 照片編碼的影像。

範例

以下程式碼範例示範如何從中建立的實例並使用 a WmpBitmapDecoder Uri。解碼後的影像作為控制的來源 Image 。


// 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)

適用於

意見反應

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