WPF JpegBitmapDecoder 创建不同的高度和宽度
我正在尝试读取 Jpeg 图像并使用以下代码将其绑定到矩形的 fill 属性：
Dim filePath as string = "PathToJpeg.jpg"
Dim imageStreamSource As New FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read)
Dim decoder As New JpegBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default)
Dim bitmapSource As BitmapSource = decoder.Frames(0)
当我用较小的图像读取此图像时，这可以正常工作。但是当我将其指向 3840 x 3024 的图形时，bitmmapSource.Height 读取 924，bitmapSource.Width 读取 1174
据我所知，几乎就像 1024x768 是上限
我在这里遗漏了一些明显的东西吗？
I'm attempting to read in a Jpeg image and bind it to a rectangle's fill property with the following code:
Dim filePath as string = "PathToJpeg.jpg"
Dim imageStreamSource As New FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read)
Dim decoder As New JpegBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default)
Dim bitmapSource As BitmapSource = decoder.Frames(0)
When I read this in with smaller images, this works ok. But when I point it to a graphic that's 3840 by 3024, bitmmapSource.Height reads 924 and bitmapSource.Width reads 1174
From what I can tell, it's almost like 1024x768 is the upper limit
Am I missing something obvious here?
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我真的不知道你为什么显式使用 JpegBitmapDecoder。我的 C# 代码非常简单：
BitmapSource 类提供两个宽度和高度属性：
宽度：以与设备无关的单位获取位图的宽度（每单位 1/96 英寸）。 (来自 MSDN)
PixelWidth：获取位图的宽度（以像素为单位）。(来自 MSDN）
我用 111 MPixel 图像对此进行了测试，效果很好。
I do not really know why you are using a JpegBitmapDecoder explicitly. My C# code for this is pretty simple:
The BitmapSource class offers two width and height properties:
Width: Gets the width of the bitmap in device-independent units (1/96th inch per unit). (From MSDN)
PixelWidth: Gets the width of the bitmap in pixels.(From MSDN)
I tested this with a 111 MPixel image and it works fine.