TiffBitmapDecoder 构造函数

参考

定义

命名空间:: System.Windows.Media.Imaging

程序集:: PresentationCore.dll

重要

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初始化 TiffBitmapDecoder 类的新实例。

重载

TiffBitmapDecoder(Stream, BitmapCreateOptions, BitmapCacheOption)	从指定的文件流，用指定的 `createOptions` 和 `cacheOption` 初始化 TiffBitmapDecoder 类的新实例。
TiffBitmapDecoder(Uri, BitmapCreateOptions, BitmapCacheOption)	从指定的 TiffBitmapDecoder，用指定的 `createOptions` 和 `cacheOption` 初始化 Uri 类的新实例。

TiffBitmapDecoder(Stream, BitmapCreateOptions, BitmapCacheOption)

从指定的文件流，用指定的 createOptions 和 cacheOption 初始化 TiffBitmapDecoder 类的新实例。

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

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

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

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

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

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

参数

bitmapStream: Stream

要解码的位图流。

createOptions: BitmapCreateOptions

位图图像的初始化选项。

cacheOption: BitmapCacheOption

位图图像的缓存方法。

属性: SecurityCriticalAttribute

例外

ArgumentNullException

bitmapStream 值为 null。

FileFormatException

bitmapStream不是标记图像文件格式 (TIFF) 编码图像。

示例

以下示例演示如何从文件流创建和使用 TiffBitmapDecoder 实例。解码的图像用作控件的 Image 源。

// Open a Stream and decode a TIFF image.
Stream^ imageStreamSource = gcnew FileStream("tulipfarm.tif", FileMode::Open, FileAccess::Read, FileShare::Read);
TiffBitmapDecoder^ decoder = gcnew TiffBitmapDecoder(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 TIFF image.
Stream imageStreamSource = new FileStream("tulipfarm.tif", FileMode.Open, FileAccess.Read, FileShare.Read);
var decoder = new TiffBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
BitmapSource bitmapSource = decoder.Frames[0];

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

' Open a Stream and decode a TIFF image.
Dim imageStreamSource As New FileStream("tulipfarm.tif", FileMode.Open, FileAccess.Read, FileShare.Read)
Dim decoder As New TiffBitmapDecoder(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)

注解

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

适用于

TiffBitmapDecoder(Uri, BitmapCreateOptions, BitmapCacheOption)

从指定的 TiffBitmapDecoder，用指定的 createOptions 和 cacheOption 初始化 Uri 类的新实例。

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

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

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

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

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

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

参数

bitmapUri: Uri

该 Uri 用于标识要解码的位图。

createOptions: BitmapCreateOptions

位图图像的初始化选项。

cacheOption: BitmapCacheOption

位图图像的缓存方法。

属性: SecurityCriticalAttribute

例外

ArgumentNullException

bitmapUri 值为 null。

FileFormatException

bitmapUri不是标记图像文件格式 (TIFF) 编码图像。

示例

下面的示例演示如何创建实例并使用 TiffBitmapDecoder a Uri. 解码的图像用作控件的 Image 源。


// Open a Uri and decode a TIFF image.
System::Uri^ myUri = gcnew System::Uri("tulipfarm.tif", UriKind::RelativeOrAbsolute);
TiffBitmapDecoder^ decoder2 = gcnew TiffBitmapDecoder(myUri, BitmapCreateOptions::PreservePixelFormat, BitmapCacheOption::Default);
BitmapSource^ bitmapSource2 = decoder2->Frames[0];

// Draw the Image.
Image^ myImage2 = gcnew Image();
myImage2->Source = bitmapSource2;
myImage2->Stretch = Stretch::None;
myImage2->Margin = System::Windows::Thickness(20);


// Open a Uri and decode a TIFF image.
var myUri = new Uri("tulipfarm.tif", UriKind.RelativeOrAbsolute);
var decoder2 = new TiffBitmapDecoder(myUri, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
BitmapSource bitmapSource2 = decoder2.Frames[0];

// Draw the Image.
var myImage2 = new Image();
myImage2.Source = bitmapSource2;
myImage2.Stretch = Stretch.None;
myImage2.Margin = new Thickness(20);

' Open a Uri and decode a TIFF image.
Dim myUri As New Uri("tulipfarm.tif", UriKind.RelativeOrAbsolute)
Dim decoder2 As New TiffBitmapDecoder(myUri, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default)
Dim bitmapSource2 As BitmapSource = decoder2.Frames(0)

' Draw the Image.
Dim myImage2 As New Image()
myImage2.Source = bitmapSource2
myImage2.Stretch = Stretch.None
myImage2.Margin = New Thickness(20)

适用于

通过

TiffBitmapDecoder 构造函数

定义

重载

TiffBitmapDecoder(Stream, BitmapCreateOptions, BitmapCacheOption)

参数

例外

示例

注解

适用于

TiffBitmapDecoder(Uri, BitmapCreateOptions, BitmapCacheOption)

参数

例外

示例

适用于

其他资源