System.Byte[*]

• JMartin

  Sorry the out of this

  textBox1.Text = myObject.GetType().ToString();

  is System.Byte[ *] . i tried

  byte[,] myByteArray = (byte[,])myObject;

  and the error message was again

  Unable to cast object of type 'System.Byte[ *]' to type 'System.Byte[,]'.

  - Thx

  
  

• llorrac

  I don't understand you code output. But when it is a multidimensional array you can cast this to an multidimensional array.
  
  

  byte[,] myByteArray = (byte[,])myObject;

  
  
  
  

• c o e s u r f

  This is some information about the API i am using.

  The document does not talk of the C# syntax.

  void AxAxisMediaControl.GetCurrentImage(int theFormat, out object theBuffer, out int theBufferSize)

  GetCurrentImage

  Gets the data corresponding to the image currently being displayed.

  Syntax

   HRESULT GetCurrentImage(int theFormat,  [C++]
        VARIANT* theBuffer,
        LONG* theBufferSize
        );

   GetCurrentImage(ByVal theFormat As Integer,  [Visual Basic]      
        ByRef theBuffer As Variant,
        ByRef theBufferSize As Long
        )

  Parameters

  theFormat

  Identifier specifiying the format of the image data. Values available are: 0 = JPEG, 1 = BMP

  theBuffer

  The buffer where the image data is returned.

  theBufferSize

  Size of the image data buffer returned.

  Return Value

  Returns an HRESULT value. Possible values include the following:

  Value	Description
  S_OK	Successful execution.
  S_FALSE	The operation was not performed because no current image was available (e.g., stream stopped).
  E_FAIL	Unexpected failure.
  E_INVALIDARG	Invalid parameter. E.g., unrecognized format.
  E_POINTER	An output parameter was not provided.

  
  

  Remarks

  If the format specified is BMP, the image data buffer is returned as a byte array with a BITMAPINFOHEADER structure followed immediately by the bitmap data in RGB24 format. Note that this buffer would not constitute a valid .BMP file if saved to a file. A BITMAPFILEHEADER structure is also required. If your purpose is to save the image to a file use SaveCurrentImage instead. This method will generate a proper .BMP file.

  
  

• Cleo HUANG - MSFT

  Argh... stupid me... I did not notice the 1..9000 range from the output. That's a byte array with a lower bound of 1 instead of 0. That's why you cannot cast it to byte[].

  Cast it to Array and use the CopyTo method of it to copy the array to a "normal" byte array. Note that you need to specify 1 for the index parameter of the copy to (or better, specify the value returned by the Array.GetLowerBound method).

  Hope this helps altough given the fact that your docs say that the paramter must be a VARIANT I'm not very sure... give it a try.

  
  

• clarkster82

  How do you initialize the byte array I this should work:
  
  

  object myObject = new byte[] { (byte)1, (byte)2, (byte)4, (byte)8, (byte)16, (byte)32, (byte)64, (byte)128 }; byte[] myByteArray = (byte[])myObject;

  
  
  
  

• Sir Hugo

  I used the above and i had the same error message. I pass the object to an API function. The follow is my code;

  object myObject = new byte[]

  {

  (byte)1, (byte)2, (byte)4, (byte)8,

  (byte)16, (byte)32, (byte)64, (byte)128

  };

  public int size;

  API.GetCurrentImage(1, out myObject, out size);

  byte[] myByteArray = (byte[])myObject;

  myByteArray = (byte[])myObject; // this is where the error occurs

  
  

• Greg Fiore

  These are some sample output in the watch window:

  Name Value Type

  ((byte[])(myobject))[1] 40 byte

  ((byte[])(myobject))[15] 24 byte

  Hope this is enough information.

  Regards

  
  

• Bill Moline

  "

  myByte=(byte[])buffer

  -buffer|{Dimensions:[1..9000]}

  [1] 40"

  Looks like your buffer is in fact a multidimensional byte array. You cannot cast it to byte[]. How do you create that buffer

  
  

• robmnk

  Hi Mike, it works.

  byte[] myByte = new byte[size];

  Array.Copy((Array)buffer, (Array)myByte, size);

  Thank you all for your help. I very much appreciate it.

  Regards

  
  

• BitBlast

  i used the follow to get the type

  textBox1.Text = myObject.GetType().ToString();

  the content of the textbox is System.Byte

• ;

  Regards