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The ToolStrip can be locked by using one or more properties, disallowing removal of buttons. I don't know what these properties are, but a little googling should help.
.45 ACP - because shooting twice is just silly
-----
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001
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First - did you make a custom control derived from ToolStripMenu?
If YES than the only way I can think of how you could force that, is by overriding the
methods/events such as myCoolMenuStrip1.ItemAdded and do nothing in there.
Something like:
protected override void OnItemAdded(ToolStripItemEventArgs e)
{
}
protected override void OnItemRemoved(ToolStripItemEventArgs e)
{
}
If Not state more clearly what you want.
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public partial class UserControl1 : ToolStrip
And i have added 10 items to this Toolstrip and now i wanna to force every-one who use this usercontrol from remove these items from this menuStrip!
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please insert the code that you have so far, that is if you have any.
And be SPECIFIC like "I want the user of the control not to be able to remove or add anything"
Or "I want the user not to be able to remove any Item but be able to Add".
Anyway post what you have.
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this is the exact thing i want :
I want the user not to be able to remove any Item but be able to Add
for user control that inherent from toolstrip;
So please Help!!!!!!!!!!!!
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From my understanding.
You have created a usercontrol that has a number of items.
If someone else uses this control, you do not want any of those items to be visible?
If this is the case then you will want to have some form of mechanism that checks if the user has authority to use those items. If they do not then when the control is initialised then emove those items, else them them there.
Is that what you mean?
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No i wanna these items be visible for them but they wont be able do remove these default items!
modified on Sunday, January 31, 2010 11:48 AM
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hello friends and respected seniors..
i'm a beginer in .net and learning .net from csinfotech, chandigarh.They help us in making a project at end of the course.
And my topic is project management website.
So when i start the project i had made 6 forms.
but when i moved those forms in admin folder i change their code file's path.
and when i place site map provider and tree view to use them as site map control.
I got an error message.when i build the application.
_____________________________________________________________________
Warning 1 G:\Project Management Site\Website\Presentation Layer\Admin\MasterPage.master: ASP.NET runtime error: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS. (G:\Project Management Site\Website\presentation layer\web.config line 29) G:\Project Management Site\Website\Presentation Layer\Admin\MasterPage.master 1 1 G:\Project Management Site\Website\
------------------------------------------------------------------------
Error no. 2 is....
-------------------------------------
Error 2 It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS. G:\Project Management Site\Website\Presentation
Layer\web.config 29
---------------------------------------
Please help me to solve the error waiting for a favorable response...
Thanks in advance...
With Regards:-
Mayank Pathak
(9465373835)
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This question appears to be about ASP.NET, I think it would get better visibility if you moved it to that forum.
MVP 2010 - are they mad?
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Try reading the guidelines on how to get an answer - urgent help is probably the 2nd most irritating request - snd cdz being the most irritating.
Never underestimate the power of human stupidity
RAH
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Error no 3: You posted your question in the wrong forum.
.45 ACP - because shooting twice is just silly
-----
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001
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hey though i'm new to .net but i know one day i'll be better then you mr. proudy.
If you can't help anyone then don't bark like this...
Better you do the same with yourself...
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mayankpathakyours@gmail.com wrote: hey though i'm new to .net but i know one day i'll be better then you mr. proudy.
Mr. Proudy? What the hell is that?
mayankpathakyours@gmail.com wrote: If you can't help anyone then don't bark like this...
I help a lot of people.
mayankpathakyours@gmail.com wrote: Better you do the same with yourself...
I'm afraid you're gonna have to explain this part. Do what with myself?
.45 ACP - because shooting twice is just silly
-----
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001
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Hello,
I am trying to figure out how many items (indexes) that an Int64 Array can hold.
I could not find any answer on MSDN but read on the internet that it can hold as
many as needed but depends on the system it is being ran on.
My program calculates all prime numbers up to N.
The array spoken of is being used by holding each digit up to N.
So, if someone wanted a list of all prime numbers up to 5003892.
It would create Int64 numArray[0 - 5003891] "I believe".
When I test a 10 digit number of 1111111111 it throws an error. 
My cpu specs are as follows:
- AMD dual core 5050e 2.60 ghz processor
- 4 GB ram
- 64-bit OS (Vista)
Is this because of available memory on my PC or is this a different problem?
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Why on earth do you load every number from 1 to N in memory?
It makes absolutely no sence.
Supose your prime detection function is called IsPrime(long Number)
all you have to do is this:
for(long i=1; i<userEnteredValue; i++) {
if(IsPrime(i)){
primes.Add(i);
}
}
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I am performing the Sieve of Eratosthenes algorithm to find prime numbers.
Loading every number from 1 to N into memory makes perfect sense.
Even though this way is slow when calculating larger numbers; its accurate.
This is the only algorithm I know of to tell whether or not a number is prime.
Creating a function IsPrime(long Number) doesn't detect whether a number is prime,
a way of finding out is still needed.
My "prime detection function" is called
sieveofEratosthenes(Int64[] newArray, Int64 newNum)
modified on Sunday, January 31, 2010 3:08 AM
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Well if you have to use it(the sieveofEratosthenes algo) then YES you have to load all numbers.
Else no.
here is a very basic implementation a of prime number finding
private void GetPrimes(long num){
if(num>2) primes.Add(2);
for (long i = 3; i <= num; i++)
{
current=true;
for (long j = 2; j <=num / 2; j++)
{
if ((i % j)==0){
current=false;
break;
}
}
if(current) primes.Add(i);
}
}
Also note that this is a simple brute force algoritm. There are many other a lot faster.
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Your brute finding of prime numbers seems to believe that all the prime numbers up to 50 are as follows:
2 , 29 , 31 , 37 , 41 , 43 , 47
I have thought of many different tricks of finding true prime numbers but to only find that it only works for some.
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Yep my bad. I wrote the "algo" in here. Not in an IDE => mistakes. But it works.
Replace
for (long j = 2; j <= num / 2; j++)
for (long j = 2; j <= i / 2; j++)
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Here is the "algo" written in an IDE and improved. It only checks if it divides by 2 and by the odd numbers.
private void GetPrimes(long num)
{
bool current = true;
for (long i = 2; i <= num; i++)
{
current = true;
if (((i % 2) == 0) && (i != 2))
{
current = false;
}
else
{
for (long j = 3; j <= i / 2; j += 2)
{
if ((i % j) == 0)
{
current = false;
break;
}
}
}
if (current)
{
primes.Add(i);
Console.WriteLine(i.ToString());
}
}
}
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There is no requirement that the numbers are explicitly present, you could use a BitArray where the index is the number (although you might want to use a custom implementation of it, since the one in the .NET framework is slow)
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The index of an array is defined as an int - thus a 32bit signed quantity. So you are definiately limited to a maximum of 2G elements. However, since you are storing int64s in the array, that implies a memory allocation of 16GB - which will almost certainly fail to allocate, certainly in 32bit systems, and probably in 64 bit systems, even with a humungeous swap file.
You are probably going to get better results, faster, by using a deterministic primality test (such as Lucas - see Wiki for details) as it may involve more compuation, but the set-up and storage costs are trivial.
If you must use a sieve, at least create it half the maximum size and treat 1 and 2 as special cases!
All those who believe in psycho kinesis, raise my hand.
My ![Badger | [badger,badger,badger,badger...]](https://www.codeproject.com/script/Forums/Images/badger.gif) 's gonna unleash hell on your ass. tastic!
modified on Sunday, January 31, 2010 10:56 AM
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Thanks, I will definitely check Lucas out.
This is how everything is done so far with my way:
code for button calculate
private void btnCalculate_Click_1(object sender, EventArgs e)<br />
{<br />
listPrimes.Items.Clear();<br />
<br />
String str = txtN.Text.Trim();<br />
Int64 num;<br />
<br />
bool isNum = Int64.TryParse(str, out num);<br />
<br />
if (isNum)<br />
{<br />
sieveofEratosthenes(intCreator(num), num);<br />
}<br />
else<br />
{<br />
MessageBox.Show("Invalid number", "Box for an idiot!");<br />
}<br />
}
code for creating integer array needed for sieve
private Int64[] intCreator(Int64 newNum)<br />
{<br />
try<br />
{<br />
Int64[] numArray = new Int64[newNum +1];<br />
int i = 0;<br />
<br />
foreach (Int64 number in numArray)<br />
{<br />
numArray[i] = i;<br />
i++;<br />
}<br />
<br />
return numArray;<br />
<br />
}<br />
catch(Exception ae)<br />
{<br />
MessageBox.Show(Convert.ToString(ae));<br />
return null;<br />
}<br />
<br />
}
code for prime detection using sieve
private void sieveofEratosthenes(Int64[] newArray, Int64 newNum)<br />
{<br />
Int64 numRoot = Convert.ToInt64(Math.Floor(Math.Sqrt(newNum))); ;<br />
<br />
Boolean[] primeArray = new Boolean[newNum + 1];<br />
<br />
Int64 newInt = 0;<br />
foreach (Boolean flag in primeArray)<br />
{<br />
if (newInt == 0)<br />
{<br />
primeArray[newInt] = false;<br />
newInt++;<br />
}<br />
else if (newInt == 1)<br />
{<br />
primeArray[newInt] = false;<br />
newInt++;<br />
}<br />
else<br />
{<br />
primeArray[newInt] = true;<br />
newInt++;<br />
}<br />
}<br />
<br />
for (int j = 2; j <= numRoot; j++)<br />
{<br />
<br />
if (primeArray[j] == true)<br />
{<br />
Int64 k = j;<br />
<br />
for (Int64 m = 0; m <= newNum; m++)<br />
{<br />
k = k + j;<br />
<br />
if (k <= newNum)<br />
{<br />
primeArray[k] = false;<br />
}<br />
}<br />
}<br />
}<br />
for (Int64 l = 0; l <= newNum; l++)<br />
{ <br />
if (primeArray[l] == true)<br />
{<br />
listPrimes.Items.Add(newArray[l]);<br />
listPrimes.Refresh();<br />
}<br />
}<br />
<br />
}
And that's it. Any ideas or thoughts about my code are greatly appreciated. good or bad.
modified on Sunday, January 31, 2010 4:01 AM
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Why the heck are you allocating an enormous int64 array, when the only place you access it is to get an element out of it - the element value being exactly the same as the index you used to get the element in the first place?
i.e. in all cases newArray[l] == l
It is bad enough that you construct a bool array as well, without allocating a couple of megabytes to hold a number you allready have!
You are aware that a bool is stored as a byte? You might want to consider using a BitArray[^] instead, since that will at least cut your storage by a factor of eight for a very small access overhead.
All those who believe in psycho kinesis, raise my hand.
My 's gonna unleash hell on your ass. tastic!
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Well, the number that's being calculated is input by the user and I used a int64 because i wanted the user to be able to use larger numbers.
I know what you mean about the elements though. I never thought of that.
I original thought I needed a 64 array to hold a large digit number in place.
but if an array has no limits i guess the index would be large itself.
So by using a bitarray I can downsize the memory allocated for the user inputed number?
Awesome.
I also figured there was a way to get rid of the bool array by just displaying the current index of the int array when num was true but that would take entire different approach.
This should help me make better code.
thanks for your responses.
Let me redo my code and post back.
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