Hello there,
I've just come accross this and wonder if i'm taking the best approach?
I read a byte[] array from the registry, this byte array is basically an
array of Int32 so i wish to revert and store this Int32 array,
I do so as follows
Byte[] byteViewColWidt hs = (Byte[])objViewColWidt hs;
m_nNumCols = byteViewColWidt hs.Length / Marshal.SizeOf( typeof(Int32));
m_arrColWidths = new Int32[m_nNumCols];
int nIntOffset = 0;
for (int nIdx = 0; nIdx < m_nNumCols; nIdx = nIdx + 4, ++nIntOffset)
m_arrColWidths[nIntOffset] = BitConverter.To Int32(byteViewC olWidths, nIdx);
basically convert every 4 bytes to an interger.
Is this best approach?
thanks in advance
Brian
6  4900 
Hi Brian,
I see that "nIdx" defines index in array-of-bytes so i don't like
"nIdx < m_nNumCols" comparison.
// if you're sure that byte's array contains only int32s and their
// byte-order is compatible with your processor then you can use it:
int[] m_arrColWidths = new int[byteViewColWidt hs.Length/4];
for(int intIndex=0; intIndex<m_arrC olWidths.Length ; intIndex++) {
m_arrColWidths[intIndex]=BitConverter.T oInt32(byteView ColWidths
, 4*intIndex);
}
HTH
Marcin Hello there,
I've just come accross this and wonder if i'm taking the best approach?
I read a byte[] array from the registry, this byte array is basically an
array of Int32 so i wish to revert and store this Int32 array,
I do so as follows
Byte[] byteViewColWidt hs = (Byte[])objViewColWidt hs;
m_nNumCols = byteViewColWidt hs.Length / Marshal.SizeOf( typeof(Int32));
m_arrColWidths = new Int32[m_nNumCols];
int nIntOffset = 0;
for (int nIdx = 0; nIdx < m_nNumCols; nIdx = nIdx + 4, ++nIntOffset)
m_arrColWidths[nIntOffset] = BitConverter.To Int32(byteViewC olWidths, nIdx);
basically convert every 4 bytes to an interger.
Is this best approach?
thanks in advance
Brian
Brian,
You have two options here. The first is to use unsafe code. In unsafe
code, you can take the pointer to the array of bytes, and cast it to an
array of integers, and you can access it normally.
The second would be to call the BlockCopy method on the Buffer class,
which will allow you to copy the byte array into the integer array.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Brian Keating EI9FXB" <csharp at briankeating.ne t> wrote in message
news:55******** *************** ***********@mic rosoft.com... Hello there,
I've just come accross this and wonder if i'm taking the best approach?
I read a byte[] array from the registry, this byte array is basically an
array of Int32 so i wish to revert and store this Int32 array,
I do so as follows
Byte[] byteViewColWidt hs = (Byte[])objViewColWidt hs;
m_nNumCols = byteViewColWidt hs.Length / Marshal.SizeOf( typeof(Int32));
m_arrColWidths = new Int32[m_nNumCols];
int nIntOffset = 0;
for (int nIdx = 0; nIdx < m_nNumCols; nIdx = nIdx + 4, ++nIntOffset)
m_arrColWidths[nIntOffset] = BitConverter.To Int32(byteViewC olWidths,
nIdx);
basically convert every 4 bytes to an interger.
Is this best approach?
thanks in advance
Brian
Thanks a million,
didn't know about this buffer class.
regards
brian
"Nicholas Paldino [.NET/C# MVP]" wrote: Brian,
You have two options here. The first is to use unsafe code. In unsafe
code, you can take the pointer to the array of bytes, and cast it to an
array of integers, and you can access it normally.
The second would be to call the BlockCopy method on the Buffer class,
which will allow you to copy the byte array into the integer array.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Brian Keating EI9FXB" <csharp at briankeating.ne t> wrote in message
news:55******** *************** ***********@mic rosoft.com... Hello there,
I've just come accross this and wonder if i'm taking the best approach?
I read a byte[] array from the registry, this byte array is basically an
array of Int32 so i wish to revert and store this Int32 array,
I do so as follows
Byte[] byteViewColWidt hs = (Byte[])objViewColWidt hs;
m_nNumCols = byteViewColWidt hs.Length / Marshal.SizeOf( typeof(Int32));
m_arrColWidths = new Int32[m_nNumCols];
int nIntOffset = 0;
for (int nIdx = 0; nIdx < m_nNumCols; nIdx = nIdx + 4, ++nIntOffset)
m_arrColWidths[nIntOffset] = BitConverter.To Int32(byteViewC olWidths,
nIdx);
basically convert every 4 bytes to an interger.
Is this best approach?
thanks in advance
Brian
Thanks a million,
didn't know about this buffer class.
regards
brian
"Mattias Sjögren" wrote: Brian,
Is this best approach?
I'd use Buffer.BlockCop y instead.
Mattias
--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.
you're quite right,
had only typed in and never got around to the testing phase.
I'm gonna go with the Buffer class option however, i didn't know about this
class.
thanks for you reply
regards
Brian
"Marcin Grzębski" wrote: Hi Brian,
I see that "nIdx" defines index in array-of-bytes so i don't like
"nIdx < m_nNumCols" comparison.
// if you're sure that byte's array contains only int32s and their
// byte-order is compatible with your processor then you can use it:
int[] m_arrColWidths = new int[byteViewColWidt hs.Length/4];
for(int intIndex=0; intIndex<m_arrC olWidths.Length ; intIndex++) {
m_arrColWidths[intIndex]=BitConverter.T oInt32(byteView ColWidths
, 4*intIndex);
}
HTH
Marcin
Hello there,
I've just come accross this and wonder if i'm taking the best approach?
I read a byte[] array from the registry, this byte array is basically an
array of Int32 so i wish to revert and store this Int32 array,
I do so as follows
Byte[] byteViewColWidt hs = (Byte[])objViewColWidt hs;
m_nNumCols = byteViewColWidt hs.Length / Marshal.SizeOf( typeof(Int32));
m_arrColWidths = new Int32[m_nNumCols];
int nIntOffset = 0;
for (int nIdx = 0; nIdx < m_nNumCols; nIdx = nIdx + 4, ++nIntOffset)
m_arrColWidths[nIntOffset] = BitConverter.To Int32(byteViewC olWidths, nIdx);
basically convert every 4 bytes to an interger.
Is this best approach?
thanks in advance
Brian This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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