BitmapDecoder.Create 方法

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

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

static member Create : System.IO.Stream * System.Windows.Media.Imaging.BitmapCreateOptions * System.Windows.Media.Imaging.BitmapCacheOption -> System.Windows.Media.Imaging.BitmapDecoder

Public Shared Function Create (bitmapStream As Stream, createOptions As BitmapCreateOptions, cacheOption As BitmapCacheOption) As BitmapDecoder

参数

返回

BitmapDecoder Stream使用指定的BitmapCreateOptions和 BitmapCacheOption.

示例

以下示例演示如何使用 Create 该方法为给定图像创建解码器。 第一 BitmapFrame 个图像用作控件的 Image 源。

Stream imageStream = new FileStream("sampleImages/waterlilies.jpg",
   FileMode.Open, FileAccess.Read, FileShare.Read);

BitmapDecoder streamBitmap = BitmapDecoder.Create(
   imageStream, BitmapCreateOptions.None,
   BitmapCacheOption.Default);

// Create an image element;
Image streamImage = new Image();
streamImage.Width = 200;
// Set image source using the first frame.
streamImage.Source = streamBitmap.Frames[0];

Dim imageStream As FileStream = New FileStream("sampleImages/waterlilies.jpg", FileMode.Open, FileAccess.Read, FileShare.Read)

Dim streamBitmap As BitmapDecoder = BitmapDecoder.Create(imageStream, BitmapCreateOptions.None, BitmapCacheOption.Default)

' Create an image element;
Dim streamImage As New Image()
streamImage.Width = 200
' Set image source using the first frame.
streamImage.Source = streamBitmap.Frames(0)

注解

OnLoad如果要在创建解码器后关闭bitmapStream缓存选项。 默认 OnDemand 缓存选项将保留对流的访问，直到需要位图，清理由垃圾回收器处理。

另请参阅

• BitmapSource

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

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

static member Create : Uri * System.Windows.Media.Imaging.BitmapCreateOptions * System.Windows.Media.Imaging.BitmapCacheOption -> System.Windows.Media.Imaging.BitmapDecoder

Public Shared Function Create (bitmapUri As Uri, createOptions As BitmapCreateOptions, cacheOption As BitmapCacheOption) As BitmapDecoder

参数

返回

BitmapDecoder Uri使用指定的BitmapCreateOptions和 BitmapCacheOption.

例外

示例

以下示例演示如何使用 Create(Uri, BitmapCreateOptions, BitmapCacheOption) 该方法为给定图像创建解码器。 第一 BitmapFrame 个图像用作控件的 Image 源。

BitmapDecoder uriBitmap = BitmapDecoder.Create(
   new Uri("sampleImages/waterlilies.jpg", UriKind.Relative),
   BitmapCreateOptions.None,
   BitmapCacheOption.Default);

// Create an image element;
Image uriImage = new Image();
uriImage.Width = 200;
// Set image source.
uriImage.Source = uriBitmap.Frames[0];

Dim uriBitmap As BitmapDecoder = BitmapDecoder.Create(New Uri("sampleImages/waterlilies.jpg", UriKind.Relative), BitmapCreateOptions.None, BitmapCacheOption.Default)

' Create an image element;
Dim uriImage As New Image()
uriImage.Width = 200
' Set image source.
uriImage.Source = uriBitmap.Frames(0)

另请参阅

• BitmapSource

public:
 static System::Windows::Media::Imaging::BitmapDecoder ^ Create(Uri ^ bitmapUri, System::Windows::Media::Imaging::BitmapCreateOptions createOptions, System::Windows::Media::Imaging::BitmapCacheOption cacheOption, System::Net::Cache::RequestCachePolicy ^ uriCachePolicy);

public static System.Windows.Media.Imaging.BitmapDecoder Create(Uri bitmapUri, System.Windows.Media.Imaging.BitmapCreateOptions createOptions, System.Windows.Media.Imaging.BitmapCacheOption cacheOption, System.Net.Cache.RequestCachePolicy uriCachePolicy);

static member Create : Uri * System.Windows.Media.Imaging.BitmapCreateOptions * System.Windows.Media.Imaging.BitmapCacheOption * System.Net.Cache.RequestCachePolicy -> System.Windows.Media.Imaging.BitmapDecoder

Public Shared Function Create (bitmapUri As Uri, createOptions As BitmapCreateOptions, cacheOption As BitmapCacheOption, uriCachePolicy As RequestCachePolicy) As BitmapDecoder

参数

返回

BitmapDecoder Uri使用指定的BitmapCreateOptions和 BitmapCacheOptionRequestCachePolicy.

注解

.NET Framework 版本 3.5 中引入了 Create(Uri, BitmapCreateOptions, BitmapCacheOption, RequestCachePolicy)。