convert int[] to byte[]

[Mimi]

Is there a way to convert int[] to byte[] easily?

I want to write my int[] indexTbl to a MemoryStream but the MemoryStream
class only accepts byte[] buffer. I have more than one int[] indexTbl to
write to the stream so it would be nice if I could just write the whole int[]
as a block and then read it back later when needed.

I thought the Buffer class might be handy here but it seems to be best for
converting byte[] to int[] with Block Copy.

Any suggestions here. I am new to C# and wanted to avoid a for-loop and
convert each int to a byte and then write to the stream one by one.

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,
One thing you can do is convert each int to bytes and write them in the
stream, youdo so using BitConverter.Ge tBytes
foreach( int i in the_int_Array)
memoryStream1.W rite( BitConverter.Ge tBytes( i);

I really don't remember a better way.
cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Mimi" <Mi**@discussio ns.microsoft.co m> wrote in message
news:90******** *************** ***********@mic rosoft.com...

Is there a way to convert int[] to byte[] easily?

I want to write my int[] indexTbl to a MemoryStream but the MemoryStream
class only accepts byte[] buffer. I have more than one int[] indexTbl to
write to the stream so it would be nice if I could just write the whole
int[]
as a block and then read it back later when needed.

I thought the Buffer class might be handy here but it seems to be best for
converting byte[] to int[] with Block Copy.

Any suggestions here. I am new to C# and wanted to avoid a for-loop and
convert each int to a byte and then write to the stream one by one.

[Richard Kure]

"Mimi" <Mi**@discussio ns.microsoft.co m> wrote in message
news:90******** *************** ***********@mic rosoft.com...

Is there a way to convert int[] to byte[] easily?

I want to write my int[] indexTbl to a MemoryStream but the MemoryStream
class only accepts byte[] buffer. I have more than one int[] indexTbl to
write to the stream so it would be nice if I could just write the whole int[] as a block and then read it back later when needed.

I thought the Buffer class might be handy here but it seems to be best for
converting byte[] to int[] with Block Copy.

Any suggestions here. I am new to C# and wanted to avoid a for-loop and
convert each int to a byte and then write to the stream one by one.

I would do it this way

int[] ints = new int[3];

ArrayList arrList = new ArrayList();

arrList.AddRang e(ints);

byte[] bytes = (byte[]) arrList.ToArray (typeof(byte));

the ArrayList has a handy ToArray method.

regards Richard

[Jon Skeet [C# MVP]]

<"Richard Kure" <None>> wrote:

I would do it this way

int[] ints = new int[3];

ArrayList arrList = new ArrayList();

arrList.AddRang e(ints);
byte[] bytes = (byte[]) arrList.ToArray (typeof(byte));
the ArrayList has a handy ToArray method.

Yes, but it doesn't convert things from one type to another. The above
code gives an InvalidCastExce ption.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Jon Skeet [C# MVP]]

Mimi <Mi**@discussio ns.microsoft.co m> wrote:

Is there a way to convert int[] to byte[] easily?

I want to write my int[] indexTbl to a MemoryStream but the MemoryStream
class only accepts byte[] buffer. I have more than one int[] indexTbl to
write to the stream so it would be nice if I could just write the whole int[]
as a block and then read it back later when needed.

I thought the Buffer class might be handy here but it seems to be best for
converting byte[] to int[] with Block Copy.

Any suggestions here. I am new to C# and wanted to avoid a for-loop and
convert each int to a byte and then write to the stream one by one.

I'd suggest you use a BinaryWriter, assuming you want to convert each
int to four bytes. If you need to convert each int to *one* byte,
you'll need to loop through.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Ignacio Machin \( .NET/ C# MVP \)]

hi,

How the use of a BinaryWriter will avoid the need of a loop?
cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com...

Mimi <Mi**@discussio ns.microsoft.co m> wrote:

Is there a way to convert int[] to byte[] easily?

I want to write my int[] indexTbl to a MemoryStream but the MemoryStream
class only accepts byte[] buffer. I have more than one int[] indexTbl to
write to the stream so it would be nice if I could just write the whole
int[]
as a block and then read it back later when needed.

I thought the Buffer class might be handy here but it seems to be best
for
converting byte[] to int[] with Block Copy.

Any suggestions here. I am new to C# and wanted to avoid a for-loop and
convert each int to a byte and then write to the stream one by one.

I'd suggest you use a BinaryWriter, assuming you want to convert each
int to four bytes. If you need to convert each int to *one* byte,
you'll need to loop through.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Jon Skeet [C# MVP]]

<"Ignacio Machin \( .NET/ C# MVP \)" <ignacio.mach in AT
dot.state.fl.us >> wrote:

How the use of a BinaryWriter will avoid the need of a loop?

You're right, it doesn't. However, you don't need to do anything
particular with each int to convert it to bytes - you can just write
the int directly.

I don't believe that there's any real benefit in avoiding looping here.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too