C# Discussion Boards - CodeProject

10-Jul-09 2:50

Hello there i need to build a receipt number the values that am receiveing is this

RecieptCode LastRecieptNumber RecieptDisplayDigits
Rcp2008- 248 8

now the main prob is in receipdisplayDigits

i know in python if i write z*8 it will be zzzzzzzz
i want the same thing in C# but if i did it i will not be able to add the last reciept number/

how could this be done?
i have another method but am sure there would be a better one my method is to add the lastreceiptnumber
with 10^(receipt display digt) then i remove the 1 and write the receipt code it will look like this

the example above
10^8 = 100000000
100000000 + 249 (since it should be new receipt) = 100000249
Convert it to string and remove the 1 = 00000249
Then i add the receipt code

Is there better way taking into concideration the performance

Best Regards

kKamel10-Jul-09 2:58

10-Jul-09 2:58

The reciept will be Rcp2008-00000249

please note that the receipt code is Rcp2008-
receiptLat number is 248
diplay digits is 8

Mirko198010-Jul-09 3:01

Mirko1980

10-Jul-09 3:01

If I understood correctly, you can do like this:

string receiptCode = "Rcp2008";
int lastReceiptNumber = 248;
int receiptDisplayDigits = 8;

string receiptString = lastReceiptNumber.ToString().PadLeft(receiptDisplayDigits, '0');
string fullReceiptCode = string.Format("{0}-{1}", receiptCode, receiptString);

EDIT: expanded taking into account your second post.

kKamel10-Jul-09 3:23

10-Jul-09 3:23

it worked fine but i did not understand the last line of code could you explain it please??

Mirko198010-Jul-09 3:36

Mirko1980

10-Jul-09 3:36

string receiptString = lastReceiptNumber.ToString().PadLeft(receiptDisplayDigits, '0');

This line converts lastReceiptNumber to string, then adds as many 0 at its left as it's needed to have a string receiptDisplayDigits characters long.
You cas also do as musefan suggested and use receiptString = lastReceiptNumber.ToString("D" + receiptDisplayDigits); instead.
After this line, receiptString will be 00000249.

string fullReceiptCode = string.Format("{0}-{1}", receiptCode, receiptString);

This line will concatenate the string created in the first line with receiptCode, using a template to define the string format.
You can also use a direct string concatenation (string fullReceiptCode = receiptCode + "-" + receiptString;).
After this line, fullReceiptCode will be Rcp2008-00000249.

kKamel10-Jul-09 3:39

10-Jul-09 3:39

Ahh ok ok man thanks alot i knew this but i forgot it because its been a while since i used {0} {1}... Big Grin | :-D

kKamel10-Jul-09 3:55

10-Jul-09 3:55

It did not work the thing you wrote about padding left since when i convert to int
the 0000000000 will turn into 0

but thanks you gave me an answer about the padding thing Big Grin | :-D

Mirko198010-Jul-09 4:08

Mirko1980

10-Jul-09 4:08

That's right, the padding is related to strings, if you convert back the string to int, you will lose al format you have applied to it.

musefan10-Jul-09 3:18

musefan

10-Jul-09 3:18

I really like the logic you have used in getting a value with 8 digits, it's great to see people thinking along those lines rather than expecting things to be done with a simple 'out the box' line of code (and thus never really learning how things are actually acheived).

But in instances like this one-liners are the way to go, so hope this helps...

int newNumber = lastReceiptNumber + 1;
string displayNumber = newNumber.ToString("D" + receiptDisplayDigits);

Life goes very fast. Tomorrow, today is already yesterday.

kKamel10-Jul-09 3:37

10-Jul-09 3:37

Thanks man i really appreciate it, we ask question so we could learn how to solve them other wise we are not programers we are just people who ask questions

musefan10-Jul-09 4:07

musefan

10-Jul-09 4:07

Exactly, and questions like yours will always be welcome in The Code Project forums Wink | ;)

Life goes very fast. Tomorrow, today is already yesterday.

kKamel10-Jul-09 3:53

10-Jul-09 3:53

Man it worked great but could you explain what is the use with "D" i did not know what did it do.

How to get Variable Names from a method.

musefan10-Jul-09 4:05

musefan

10-Jul-09 4:05

some data types (such as int) have the option to overload the ToString method and provide a string containing format information. 'D' followed by a number ensures that the string contains as many preceding zeros as dictated by the number. have a look here[^] for more information

Life goes very fast. Tomorrow, today is already yesterday.

Anir198210-Jul-09 1:51

Anir1982

10-Jul-09 1:51

I am using Relection to get Methods from an Assembly.
I want to display the local Variable names in a method.

I have a test method called Test.

public void Test()
{
string myString = string.Empty;
int myInt = 0;
}

So I am using the following code:

MethodInfo[] methodInfo = type.GetMethods(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);

List<MethodInfo> methods= new List<MethodInfo>(methodInfo);

foreach (MethodInfo method in methods)
{
MethodBody methodBody = method.GetMethodBody();
IList<LocalVariableInfo> localVariables = methodBody.LocalVariables;
}

My problem is, even if I loop through the localVariables collection, I am not able to get the name of the variables of Test Method.

Kindly let me know how do I get the variable names.

Thanks in Advance.

Luc Pattyn10-Jul-09 1:56

Luc Pattyn

10-Jul-09 1:56

Hi,

AFAIK local variables are not available in the meta data, except for the method's parameters.

Smile | :)

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Nagy Vilmos10-Jul-09 2:56

Nagy Vilmos

10-Jul-09 2:56

Correct. Reflection only exposes the interface, not the implimentation.

Panic, Chaos, Destruction.
My work here is done.

Anir198210-Jul-09 3:04

Anir1982

10-Jul-09 3:04

Agreed, I know that,
but I could see the variable names in the method in ildasm so I thought there might be a way to get those. I know ildasm is DISASSEMBLER Smile | :)

but took a chance.

Thanks for reply,
Aniruddha

Luc Pattyn10-Jul-09 7:39

Luc Pattyn

10-Jul-09 7:39

Hi,

forget Reflector, it won't tell you about locals. You need either the source files or, maybe, the PDB file.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.