Question

我正在尝试将图像保存到SQL Server，以便SSRS可以读取它。我需要转换为WriteableBitmap（可能还有JPEG？），这样我才能在保存之前更改图像大小。但是，当我尝试将转换后的图像从SQL Server中拉出时，它根本不会在SSRS中呈现。我做错了什么？

  byte[] m_Bytes = ReadToEnd(fileStream); //this works fine
  WriteableBitmap bmp1 = new WriteableBitmap(166, 166);
  bmp1.FromByteArray(m_Bytes);  //this works fine

  ExtendedImage image = bmp1.ToImage();
  MemoryStream stream = new MemoryStream();
  ImageTools.IO.Encoders.AddEncoder<JpegEncoder>();
  JpegEncoder encoder = new JpegEncoder();
  encoder.Encode(image, stream);

  BitmapImage img = new BitmapImage();
  img.SetSource(stream);
  WriteableBitmap bmp2 = new WriteableBitmap(img);


  byte[] buffer1 = bmp2.ToByteArray();
  CurrentOrder.CompanyImage = buffer1; //this does save a byte array but it will not render in SSRS.  If I set buffer1 to bmp1.ToByteArray() then it works fine but I am still unable to resize it using the resize method in WriteableEx without it not rendering in SSRS.

这是对同一件事的另一次尝试，它也不会呈现：

这更简单，也不会起作用：

byte[] m_Bytes = ReadToEnd(fileStream); 
WriteableBitmap bmp1 = new WriteableBitmap(166, 166); 
bmp1.FromByteArray(m_Bytes); 
WriteableBitmap resizedImage = bmp1.Resize(25, 25, WriteableBitmapExtensions.Interpolation.Bilinear); 
byte[] buffer1 = resizedImage.ToByteArray(); 
CurrentOrder.CompanyImage = buffer1;

Answer 1

你想要的是调整166x166（或25x25）的大小，导出为byte []并从这个字节数组重新加载图片？

您可以尝试使用BitmapImage吗？

BitmapImage image = new BitmapImage();
image.SetSource(fileStream);

WriteableBitmap bitmap = new WriteableBitmap(image);
WriteableBitmap resizedBitmap = bitmap.Resize(25, 25, WriteableBitmapExtensions.Interpolation.Bilinear);

CurrentOrder.CompanyImage = resizedBitmap.ToByteArray();

将FileStream转换为WriteableBitmap为JPEG格式为SSRS的字节数组

1 个答案: