Why is the binary number flipped when reading from a byte array? - C# Discussion Boards

6-Oct-06 11:52

I am loading a form from an XML. I store the location and size info as follows:
<window number="1" x="110" y="145" width="700" height="722">

But each time I load the form, it's height is exactly 20 pixels smaller than what is in the file.

Not to mention the form I launch from shows a 20 point shrinkage as well even though visually it does not chage size.

The code I use to launch the window is:
Window win = new Window(this, name, nextCollWinXMLNode);
win.Show();

Has ayone experienced this behavior before?

Thanks,
RABB17

RABB17

"Nothing fancy needed, please just solve all our problems as quickly as possible."

Amar Chaudhary6-Oct-06 22:04

6-Oct-06 22:04

it is dependent on the height of the title bar which in default xp theme is 20 pixels

size of title bar may variate with change in os and / or theme

toget rid of this experiment with position and size variable

i did that few weeks ago but i didnt remember what actualy was the solution

Smile | :)

Rabbit179-Oct-06 9:20

9-Oct-06 9:20

Is there a way to make it universal across OS/Theme? In other words, is there a way to get the size of the title bar and or border?

RABB17

"Nothing fancy needed, please just solve all our problems as quickly as possible."

Amar Chaudhary9-Oct-06 12:28

9-Oct-06 12:28

sorry for late responding

<br />
           int diff = 0;<br />
            diff = this.Height - this .ClientRectangle.Height;<br />
            //or you can also try this<br />
            diff = this.Height - this.DisplayRectangle.Height;<br />
// you need to check which one is better i dont know why they put these two rectangles <br />
/* i just hate taking theory lessons */<br />

Rabbit179-Oct-06 9:20

9-Oct-06 9:20

Is there a way to make it universal across OS/Theme? In other words, is there a way to get the size of the title bar and or border?

Thanks,
RABB17

RABB17

"Nothing fancy needed, please just solve all our problems as quickly as possible."

Rabbit179-Oct-06 10:59

Why is the binary number flipped when reading from a byte array?

9-Oct-06 10:59

Thanks,
I figured this out. I was passing my form and initialized the sizer after it had already been initialized once. Now I just set a global variable and set it on the passed form.

RABB17

RABB17

"Nothing fancy needed, please just solve all our problems as quickly as possible."

mmatteson6-Oct-06 10:31

mmatteson

6-Oct-06 10:31

I am reading UDP packets that a router is sending to me. In this example i am reading the "system uptime" field which starts at bit position 64 from the begining of the packet and is a 32 bit field. So the end of the field is calculated to end at 95.
I know that the first byte of this two bit field prints to the console 69 when i Console.WriteLine(buffer[8]). When I do a Convert.ToString(buffer[8],2) I get 101000101 printed on the console. I converted this byte to a decimal number. unfortunatly this is revered! and is being counted LEFT to RIGHT!
When the binary numbers should start from Right to left. the real binary number of 69 is 01000101. which is the mirror opposite of what the console printed. Do you have any idea why this is?

Here is the code that I am looking at.

public static uint Parse(byte[] datagram, int offset, int length)
{
uint total = 0;
int byte_index;
int bit_offset;
int bit;
byte b;

for ( int i = 0; i < length; i++ )
{
bit_offset = (offset+i) % 8;
byte_index = (offset+i-bit_offset) / 8;
b = datagram[byte_index];

//Writing the datagram to the console and performing the Convert.ToString is where i notice this.

bit = (int)(b >> (7 - bit_offset));
bit = bit & 0x0001;
if ( bit > 0 )
{
total += (uint)Math.Pow(2,length-i-1);
}
}
return total;
}

Is this why there is the shift right and then the AND to somehow fix this issue?

Re: Why is the binary number flipped when reading from a byte array?

Insincere Dave6-Oct-06 12:51

Insincere Dave

6-Oct-06 12:51

See endianness for information and see IPAddress.NetworkToHostOrder() for conversion methods.

Computer Generated Random Numbers

shabonaa6-Oct-06 10:27

6-Oct-06 10:27

what is the type of the distrbution of Computer Generated Random Numbers?

led mike6-Oct-06 11:55

led mike

6-Oct-06 11:55

shabonaa wrote:
what is the type of the distrbution of Computer Generated Random Numbers?

No one knows, it's random.

led mike

Guffa6-Oct-06 12:41

Guffa

6-Oct-06 12:41

That depends on what algorithm is used.

The numbers produced by the Random class is suitable for most regular uses. To create secure keys for encryption it's too predictable, so the encryption classes have their own random generator.

---
b { font-weight: normal; }

shabonaa6-Oct-06 13:20

6-Oct-06 13:20

what is type of distribution the default random function in .net use?

Guffa6-Oct-06 13:27

Guffa

6-Oct-06 13:27

Is this a question on a test, or something?

The distribution is supposed to be uniform. I don't know the exact algorithm, so I can't say how close to uniform they are.

---
b { font-weight: normal; }

shabonaa6-Oct-06 13:46

6-Oct-06 13:46

No but one of my friends is trying to convinces me that it is not a uniform distrbution but i think it is a uniform so i needed to be sure to face him

Guffa6-Oct-06 15:26

Guffa

6-Oct-06 15:26

Well, as the random numbers are not truly random, the distribution is not truly uniform, but it certainly isn't any other type of distribution.

---
b { font-weight: normal; }

shabonaa6-Oct-06 15:52

6-Oct-06 15:52

thank u Guffa for ur help

Amar Chaudhary6-Oct-06 19:56

How to upgrade mdb database

6-Oct-06 19:56

nothing is random here they are dependent on current time (millisecs presicion)
Smile | :)

ValueMember in combobox

microuser_20006-Oct-06 10:23

microuser_2000

6-Oct-06 10:23

hellow to all ..
i am trying to load data from a database in c# , but i am looking to be able in the combobox to select a valuemember , i saw a class that a member wrote nice idea , but is there any other way or simpler way like in the vb.net ?
thxx

nhuythanh6-Oct-06 10:14

nhuythanh

6-Oct-06 10:14

I have application that need to upgrade an existing .mdb file with few modification on .mdb file structure such as add new collum into existing table, changed index properties on couple existing column.

Is there a way to modifyy .mdb file on the fly or do i have to extract data out from old database and insert into new database which have the new structure?

Please help.

Thanks

Re: How to upgrade mdb database

Amar Chaudhary6-Oct-06 11:51

How to print Datagrid in C# ?

6-Oct-06 11:51

i dont know much but
you can use add table query for another database create the new data base with modified data and after the query is completed rename your existing database (for backup purpose) and bring new database in its position

hope this helps
Smile | :)

hdv2126-Oct-06 10:05

hdv212

6-Oct-06 10:05

hi i found an article in codeproject as DataGridPrinter that print datagrid good. but it has written with VB.Net and i want it in csharp. when i create dll in VB.Net and i use it in c# the following error shown me :

Unable to cast object of type 'System.Windows.Forms.BindingSource' to type 'System.Data.DataTable'

and when i set Datagrid1.DataSource = ds1.Tables["Table1"]; the following error shown me :

//in Line 374
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

how to solve my problem and do you have a other class that print datagrid in C# with header and footer ?
thanks ..

[Message Deleted]

Wolf926-Oct-06 8:42

Wolf92

6-Oct-06 8:42

[Message Deleted]

Re: Christmas gift ideas?

led mike6-Oct-06 8:51

led mike

6-Oct-06 8:51

Wolf92 wrote:
I need to think

Wolf92 wrote:
Can you help me?

Yes, hold on.............................................. did that help?

led mike

Re: Christmas gift ideas?

Amar Chaudhary6-Oct-06 9:21