C# Discussion Boards - CodeProject

Menus at run time [modified]

24-Apr-07 6:18

Ew.

Instead of magically showing a masked text box over the cell that has been clicked, you may consider actually creating a masked text box CELL -

This requires creating a column and corresponding cell of your specific control type.

Here is a great tutorial on how to do this, I have used it to create several custom column and cell types:

http://msdn2.microsoft.com/en-us/library/aa730881(vs.80).aspx[^]

Yes, it is more work, but you get 3 things for free:

1. The grid will automatically show the control in the correct place.
2. The control can be databound, meaning it takes care of all the data transactions for you
3. It keeps your business code simpler by not involving the management of temporary text boxes.

------------
Cheers,
Patrick

a_david12323-Apr-07 19:51

a_david123

23-Apr-07 19:51

Dear All

I am working on a drawing application using OpenGl and C#. I want to use the whole form as Drawing area, i have added menus to my application but these menus does not show at run time, help required
thanks

David

-- modified at 4:48 Tuesday 24th April, 2007

david

Extract ClassName using Regular Expression

nasambur23-Apr-07 19:25

nasambur

23-Apr-07 19:25

hi,

i want to extract only the class names from a C# file..
i have a pattern like this..

pattern: "\\s*(namespace|class)[^{]*"

but it gives matches along with the namespace and class keyword..

i want a pattern that can extract only class|namespace names from
the lines that are not commented in the source code..

plz help.

regards,
nas

Reading a specific word/phrase from a line

zoroyster23-Apr-07 17:25

zoroyster

23-Apr-07 17:25

Hi
Not sure if this was already asked, but I'm trying to find a way to get a certain text (or phrase) from a line in notepad using C#

example: (notepad)

>Name: Joseph Smith
>Address: Main Street

I need to get name (Joseph Smith) and the address only, ignoring the "name:" and "address:"

so far i only know how to read the entire line, but i have no idea how in the world i can isolate the desired text/phrase

Hope you guys can help. Thanks

Patrick Etc.23-Apr-07 17:31

23-Apr-07 17:31

If you can rely on a standard line format, it's pretty easy:

string line = "Name: Joseph Smith";

string[] parts = string.split(line, ":");

Then the parts[] array will contain the following strings:

parts[0] = "Name"
parts[1] = " Joseph Smith"

Note the space before Joseph. You could use string.Trim() to get rid of that, or you can modify the split to use StringSplitOptions.RemoveEmptyEntries.

I'm assuming you're using C#, here.

------------
Cheers,
Patrick

xibeifeijian23-Apr-07 18:25

xibeifeijian

23-Apr-07 18:25

Why don't you try a xml file?

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Patrick Etc.23-Apr-07 18:34

23-Apr-07 18:34

He specifically said he's getting a line from a text file in notepad and gave an example line. XML works nicely, yes, but unfortunately not everyone uses XML to store application information Wink | ;)

------------
Cheers,
Patrick

zoroyster23-Apr-07 19:35

zoroyster

23-Apr-07 19:35

Patrick Sears wrote:
If you can rely on a standard line format, it's pretty easy:

string line = "Name: Joseph Smith";

string[] parts = string.split(line, ":");

Then the parts[] array will contain the following strings:

parts[0] = "Name"
parts[1] = " Joseph Smith"

Note the space before Joseph. You could use string.Trim() to get rid of that, or you can modify the split to use StringSplitOptions.RemoveEmptyEntries.

I'm assuming you're using C#, here.

------------
Cheers,
Patrick

Hi Patrick! thanks for the help. Yes, im using C#, but i received this error

"Error 1 'string' does not contain a definition for 'split'" for string[] parts = string.split(line, ":");

do i need to import something?

thanks again

xibeifeijian23-Apr-07 19:44

xibeifeijian

23-Apr-07 19:44

Split isn't a static method.Use in in a object instance and take care of the case.

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Patrick Etc.24-Apr-07 6:00

How to impose Expire Date on MS Office files? [modified]

24-Apr-07 6:00

Sorry, xibeifeijian has it right - it's an instance method, I was just indicating what class it belongs to. Sorry about that Frown | :(

Sometimes I'm not sure if people will understand I'm speaking in pseudocode; sort of depends on experience level which I don't know up front.

Let me know if you need anymore help figuring out how to do the parsing!

------------
Cheers,
Patrick

sachinkalse23-Apr-07 17:21

sachinkalse

23-Apr-07 17:21

I am using Document Library in MOSS to store MS Office files to make use of IRM in MOSS. (Web application)

I want to impose expire date at document level before uploading to
document library such that even if the document is downloaded on client machine, after expiry date, the document should not open.

Thus, is there any way to impose expire date on MS office files (excel/word/power point/ infopath) using C#? Sniff | :^)

Please guide.

-- modified at 22:21 Wednesday 13th June, 2007

Regards
Sachin

Re: How to impose Expire Date on MS Office files?

Russell Jones24-Apr-07 0:04

Russell Jones

24-Apr-07 0:04

i don't know about using c# but i guess you could add a macro to the documents concerned to either delete their own contents or inform the user that the document has expired. I know MS were talking about creating expiring e-mail etc some while ago but i never heard if they implemented it.

Russell

Re: How to impose Expire Date on MS Office files? [modified]

sachinkalse13-Jun-07 16:36

sachinkalse

13-Jun-07 16:36

Maco can be disabled while opening the document, thus will not be useful.

We were trying to add permissions to the file ojbetcs directoy using following code but that is giving very generalized exception
"Value does not fall within the expected range"

Please have a look at the code below

------------------------------------------

<br />
using System; <br />
using System.Collections.Generic; <br />
using System.Text; <br />
using Microsoft.Office.Core; <br />
using ExcelInterop = Microsoft.Office.Interop.Excel; <br />
using Microsoft.Office.Interop.Word; <br />
 <br />
<br />
class Program <br />
{<br />
  private void ImposeExpiryDate()  <br />
{<br />
<br />
//For Excel <br />
ExcelInterop.ApplicationClass excel = new Microsoft.Office.Interop.Excel.ApplicationClass (); <br />
<br />
ExcelInterop.WorkbookClass workBook = (ExcelInterop.WorkbookClass)excel.Workbooks.Open( "c:\\test.xls", 0, true, 5, "" , "", true, ExcelInterop. XlPlatform .xlWindows, "\t", false, false , 0, true, 1, 0); <br />
ExcelInterop.Sheets sheets = workBook.Worksheets; <br />
<br />
DateTime dtExpirationDate = DateTime.Today.AddDays(2); <br />
try <br />
{<br />
  workBook.Permission.Add(@"sachin@abc.com" ,Microsoft.Office.Core.MsoPermission.msoPermissionFullControl, dtExpirationDate); <br />
}<br />
<br />
catch (Exception EX) <br />
{<br />
// "Value does not fall within the expected range" ???<br />
}<br />
<br />
<br />
//For Word <br />
// Microsoft.Office.Interop.Word.ApplicationClass WordApp = <br />
// new Microsoft.Office.Interop.Word. ApplicationClass (); <br />
// Microsoft.Office.Interop.Word.Document aDoc = <br />
//  WordApp.Documents.Open(ref fileName, ref missing, <br />
//  ref readOnly, ref missing, ref missing, ref missing, <br />
//  ref missing, ref missing, ref missing, ref missing, <br />
//  ref missing, ref isVisible); <br />
<br />
// aDoc.Permission.Add<br />
// ("sachin@abc.com" ,<br />
//  Microsoft.Office.Core.MsoPermission.msoPermissionFullControl, <br />
//  dtExpirationDate); <br />
}<br />
<br />
}<br />

Regards
Sachin

Very basic help with C++ linker/logic errors

wertyou23-Apr-07 17:05

23-Apr-07 17:05

Please help me as I am getting 8-12 compiler errors & suck at C++. I just want to pass this class & teacher is a jerk with no help available. What's wrong with this? Confused | :confused:

I will be eternally grateful.

//******************************************************
// Filename: D4_Lab_02.cpp
// Purpose: Fix the Errors
// Author: Melissa
// Revised: April 22, 2007
//******************************************************

#include<iostream>
#include<string>
using namespace std;
void pause(void);

#define PI=3.1415

int twiceage
string last_name;
string lastname_length;
string age;

//******************************************************
// main
//******************************************************

int main(void)
{

cout << "INPUT ITEMS\n";
cout << "\nEnter your last name ----->: ";
cin >> last_name;
cout << "\nEnter how many letters are in your last name --->: ";
cin >> lastname_length;
cout << "\nEnter your age ----------->: ";
cin << age;

cout << "\nOUTPUT ITEMS\n";
cout << "\nYou said your last name was: " << last_name;
cout << "\n\nYour last name has ";
cout << lastname_length<< " letters in it.";
cout << "\n\nYour age is: " << age;

twiceage = age*2

cout << "\n\nTwice your age is: " << age*2;
cout << "\n";

for (count=0; count <5; count++)
{
cout << "\nHi Mom!";
}

cout << "\n\nThe area of a circle with a 6 inch diameter is: ";
cout << 3 * 3 * PI;

pause(void);

return 0;
}

//******************************************************
// pause
//******************************************************

void pause(void)
{
char pause;

cout << "\n\n\nHit Enter Key to Continue: ";
cin.get(pause);
cin.get(pause);

return;
}

//******************************************************
// End of Program
//******************************************************

Melissa

Patrick Etc.23-Apr-07 17:27

23-Apr-07 17:27

1. What are the errors you're getting? It's hard to tell you the source if we don't know what they are Wink | ;)

2. You have several syntactical errors:

a. int twiceage needs a semicolon after it.
b. cin << age; should have the pipe pointing the other direction
c. twiceage = age*2 needs a semicolon at the end
d. technically, you don't need arguments to the pause() function, and using pause(void) in the function definition is an error - if you're going to provide a type specifier you need to provide a variable name too (the declaration at the top is fine, though). So for pause, it'd be better just to declare the function as "void pause()"

Try fixing those and let us know what further errors you get.

------------
Cheers,
Patrick

wertyou23-Apr-07 17:37

23-Apr-07 17:37

Thank you, Patrick.
Now it's down to 8 errors, so that is a step in the right direction- yeah!

What it's saying is...
in function 'int main()'
43 no match for 'operator*' in 'age*2'
45 no match for 'operator*' in 'age*2'
48 overloaded function with no contextual type information
48 missing'>' to terminate the template argument list
48 could not convert 'count<5>' to 'bool'
48 no post-increment operator for type
55 expected primary-expression before '=' token
57 expected primary-expression before "void"

Also, could you explain how to arrive at the answer of 9 from this expression?
29 >= 25 ? 7 + 2 : 14 - 9

Wicked thanks a lot for any & all help! Smile | :)

Melissa

Patrick Etc.23-Apr-07 17:45

23-Apr-07 17:45

wertyou wrote:
43 no match for 'operator*' in 'age*2'

Whoops. Missed this. age needs to be declared as an int; you're declaring it as a string. cin will do the work for you of converting the input to the correct type. If it happens that the input can't be converted to an integer, the value will be undefined and you'll likely get garbage when you do the multiplication (this depends on the compiler - some compilers will default the int to 0 for you, but don't depend on that behavior).

What that error is telling you is that there is no 'multiply' operator defined between a string and an integer, which is true.

wertyou wrote:
48 overloaded function with no contextual type information
48 missing'>' to terminate the template argument list
48 could not convert 'count<5>' to 'bool'
48 no post-increment operator for type

Simple - the 'count' variable isn't defined anywhere. Simply define an 'int count;' somewhere.

See if that takes care of lines 55 and 57 also.

wertyou wrote:
Also, could you explain how to arrive at the answer of 9 from this expression?
29 >= 25 ? 7 + 2 : 14 - 9

That's called 'ternary' notation - the stuff before the ? is evaluated to true or false, and if it is true, the stuff between the ? and : is returned; if it evaluates to false, the stuff after the : is returned.

In this case, 29 is indeed greater than or equal to 25, so the operation returns "7 + 2" which equals 9.

------------
Cheers,
Patrick

wertyou23-Apr-07 18:04

23-Apr-07 18:04

Thank you for the reply. I did what you said and also added two lines about asking the persont to input a count number. So far, there are only 2 errors left! It's in line 58 and 60, saying
expected primary-expression before '=' token
and
expected primary-expression before '=' void
It's regarding the last part about the 3*3*PI -- am I defining PI wrong?

I kind of understand what you're saying about the math expression - I thought it was the one that was 1 for true and 0 for false- how can I tell them apart? Unsure | :~

Thanks again.

Melissa

Patrick Etc.23-Apr-07 18:27

23-Apr-07 18:27

wertyou wrote:
It's in line 58 and 60, saying
expected primary-expression before '=' token
and
expected primary-expression before '=' void

Whoops, missed that one too.

You're using this to define PI:

#define PI=3.14159

#define's don't use the equals sign - just a space, like this:

#define PI 3.14159

What you need to know here is that the compiler has a step called "Preprocessing" in which it does literal string replacement of all #define's with their values - it actually replaces those physical characters before compiling. So what the compiler is actually seeing at 3*3*PI looks like this:

cout << 3 * 3 * =3.14159;

which obviously is nonsense. That's the cause of the other error about void, too, because the compiler is getting totally confused by that equals sign.

wertyou wrote:
I kind of understand what you're saying about the math expression - I thought it was the one that was 1 for true and 0 for false- how can I tell them apart?

No, the ternary operator operates on straight booleans. It will, however, interpret 1 as true and 0 as false, but those really have little to do with how the operator works.

It's pretty simple:

return CONDITION ? TRUE_EXPRESSION : FALSE_EXPRESSION;

The operator evaluates CONDITION to be true or false and returns the corresponding expression. Then, that expression is evaluated, no matter what it is. I could be a function call; it could be an integer; it can be any valid expression, really.

So, the following are all valid uses of the ternary operator:

int result = (true) ? 1 : 0; // returns 1

string result = (1) ? "yes" : "no"; // returns "yes"

string result = (0) ? "no" : "yes"; // returns "no"

int result = (29 >= 25) ? 7 + 2 : 0; // returns 7 + 2, which evaluates to 9.

And so forth.

------------
Cheers,
Patrick

wertyou23-Apr-07 18:42

23-Apr-07 18:42

Thanks a lot, Patrick. It seems a lot easier to understand about the ternary stuff. Also, thanks for the code help, too.
Big Grin | :-D

Melissa

Patrick Etc.23-Apr-07 18:45

23-Apr-07 18:45

Glad I could help!

------------
Cheers,
Patrick

wertyou24-Apr-07 14:53

24-Apr-07 14:53

I still have one error in this code and it's the following:
57 no match for 'operatr >>' in 'std::cin>> 2.8273...
and then 22 errors that are exactly the same
std:basic_istream<_CharT, _Traits>& std::basic_istream<chart, _traits="">::operator>>

Do you know what this means?
Sorry for asking again. I asked this last question to the instructor and he hasn't replied. The lab is already late.

#include<iostream>
#include<string>
using namespace std;
void pause(void);

#define PI 3.1415

int main(void)
{
cout << "\n\nThe area of a circle with a 6 inch diameter is: ";
cin >> 3 * 3 * PI;

pause(void);

return 0;
}

Melissa

Patrick Etc.24-Apr-07 15:09