|
Whosit wrote:
This is absolutely bizarre.
It certainly is. If I were to take a guess I would say there is some greater problem somewhere else in your code, because bitwise-or and bitwise-and work the same as they do in C/C++.
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
|
|
|
|
|
Well, i dont think so, but its not mostly my code. To make my CRC32 ColumnHandler i took the ColumnH code from the first project below, and just dropped in the CRC32 class from the second one in place of the MD5 code. The only other changes i made (which is where i had the & vs. | problem) Is below...
http://www.codeproject.com/csharp/ColumnHandler.asp
http://www.codeproject.com/csharp/crc32_dotnet.asp
In the implementation of GetColumnInfo i changed the column title and description and then:
psci.fmt=LVCFMT.RIGHT;<br />
psci.cChars=40;<br />
<br />
psci.csFlags=SHCOLSTATE.TYPE_STR;
to
psci.fmt=LVCFMT.LEFT;<br />
psci.cChars=40;<br />
<br />
psci.csFlags=SHCOLSTATE.TYPE_STR & SHCOLSTATE.ONBYDEFAULT & SHCOLSTATE.SLOW;
The last line setting csFlags is where i had problems. When i tried to use the OR (|) it consistently hung. But when i use the AND (&) it works just beautifully with the right results and all.
Then what threw me off even more was a line (unchanged) in GetItemData which reads:
if(((FileAttributes)pscd.dwFileAttributes|FileAttributes.Directory)==FileAttributes.Directory)
Where the original author is checking the flag with an OR.
This is all quite backwards from what i know of bit-wise logic.
Any explanations or ideas why this is?
|
|
|
|
|
whosit wrote:
Any explanations or ideas why this is?
I can't think of any reasons, but a quick test shows that what we know of as bitwise logic is what C# uses.
[Flags()]
public enum Enum
{
A = 1,
B = 2,
C = 4,
D = A | B,
E = 8,
F = 64
}
[STAThread]
static void Main(string[] args)
{
Enum e = Enum.A;
Console.WriteLine("e = {0}", e);
e = Enum.A | Enum.C;
Console.WriteLine("e should equal (A): e = {0}", e);
if( (e & Enum.A) == Enum.A )
Console.WriteLine("Enum.A is set");
else
Console.WriteLine("Enum.A isn't set");
e = (e | Enum.B);
Console.WriteLine("e should (A, B, C) or (D, C): e = {0}", e);
if( (e & Enum.C) == Enum.C )
Console.WriteLine("Enum.C is set");
if( (e & Enum.B) == Enum.B )
Console.WriteLine("Enum.B is set");
if( (e & Enum.A) == Enum.A)
Console.WriteLine("Enum.A is set");
e = e | Enum.E;
if( (e & Enum.E) == Enum.E)
Console.WriteLine("Enum.E is set - correct usage");
if( (e | Enum.E) == Enum.E)
Console.WriteLine("Enum.E is set - incorrect usage");
e = e & (~Enum.E);
Console.WriteLine("e should be (A, B, C) or (D, C)...e was unset: e = {0}", e);
Console.ReadLine();
}The output should be:
e = A
e should equal (A): e = A, C
Enum.A is set
e should (A, B, C) or (D, C): e = D, C
Enum.C is set
Enum.B is set
Enum.A is set
Enum.E is set - correct usage
e should be (A, B, C) or (D, C)...E was unset: e = D, C Now as to the next part...
whosit wrote:
Then what threw me off even more was a line (unchanged) in GetItemData which reads:
if(((FileAttributes)pscd.dwFileAttributes|FileAttributes.Directory)==FileAttributes.Directory)
Where the original author is checking the flag with an OR.
The code above would work, so long as pscd.dwFileAttributes had either no flags set or just the FileAttributes.Directory flag set, in which case the bitwise-or effectively does nothing and the check continues to work.
Doing a quick test if I change the | to the proper & it still works as expected, and taking a look at some directories I can't find any that don't report to contain some read-only files, even dirs with no files in them. Trying to change that (by unchecking readonly in the dir properties box) has no effect.
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
|
|
|
|
|
Oh well, must be some 'feature' to make logic easier for..... someone. *shrug*
Thanks anyway. At least it works, even if it IS backwards (in my case).
By the way, which epsidoe is your Data quote from in your sig?
|
|
|
|
|
whosit wrote:
if(((FileAttributes)pscd.dwFileAttributes|FileAttributes.Directory)==FileAttributes.Directory)
I played around a bit more with the sample and indeed the code above doesn't work like the author intended, but because he wrote exception-safe code you never know it.
I through in some System.Diagnositc.Trace.WriteLine calls through out the function, the first was in the if statement where I told it to print the FileAttributes of the item that caused it to trigger the return. Interesting, as I thought only those that are have Directory get printed.
Then I added some code in the exception handlers to print out the exceptions and the FileAttributes of the item that had the exception. Each of the exceptions was Access to the path "C:\path" is denied. and the FileAttributes was Directory and ReadOnly or Directory and System.
whosit wrote:
psci.csFlags=SHCOLSTATE.TYPE_STR & SHCOLSTATE.ONBYDEFAULT & SHCOLSTATE.SLOW;
As to why you had to use & for it to work, I assume it deals with the stuff above. That is my next thing to try 
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
|
|
|
|
|
Ahh..... so the directory check then in fact actually *SHOULD* be an AND and i dont just have some messed up compiler? Thats Very good to know.... now i can feel safer about my sanity
|
|
|
|
|
bitwise operators work just fine in c#
1 | 1 gives 1
0 | 1 gives 1
1 | 0 gives 1
0 | 0 gives 0
just as it should
1 & 1 gives 1
0 & 1 gives 0
1 & 0 gives 0
0 & 0 gives 0
just as it should to ..
//Roger
|
|
|
|
|
Hi All,
I'm having a problem with (as you could probably tell from the title) javascript in the webbrowser control. On the page I'm trying to get working there are some text boxes that should automatically fill in when you type a few characters, but for some reason they're not working. If I try the page in IE they work fine. I didn't create the page I'm just using it. Any ideas as to why the javascript wouldn't be working with the browser control? Is there a setting I need to make?
Many thanks in advance.
|
|
|
|
|
monrobot13 wrote:
Is there a setting I need to make?
No. However some functions do not work in a web browser control. There is no documented list of such unsupported functions.
monrobot13 wrote:
why the javascript wouldn't be working with the browser control?
Do you see any error message box ?
And while you are in a stand-alone Internet Explorer instance, where it seems to work fine, do you have a yellow icon in the status bar (which signals javascript errors) ?
|
|
|
|
|
First, thanks for the reply.
.S.Rod. wrote:
Do you see any error message box ?
No, there is no error box that pops up.
.S.Rod. wrote:
And while you are in a stand-alone Internet Explorer instance, where it seems to work fine, do you have a yellow icon in the status bar
I just checked an no there is no error icon. Something strange that I noticed last night though. On the site, if you type something incorrect into the box, when it loses focus it deletes the text. Now, in my program that part works (I assume it's done in javascript as well) the only thing that doesn't appear to be working in the autocomplete thing that it does.
It's really baffling and grating on my nerves. Any ideas or help would be very much appreciated.
|
|
|
|
|
It looks like an issue originated by a rather specific combination of javascript source code. I am afraid you'll have to post portions of it.
monrobot13 wrote:
Any ideas or help would be very much appreciated.
The best idea I can come across is to tell you to post on the right forum. The issue is not related to C#.
|
|
|
|
|
Here's a good one ...
Assembly C (.DLL) exposes (among other things) a number of type converters.
Assembly B (.DLL) exposes a derived form containing a PropertyGrid that 'uses' C's type converters.
Assembly B therefore has a static project reference to C.
Assembly A (.EXE) dynamically loads assembly B and displays B's form as a child of A's main form.
The problem is, the PropertyGrid 'loses' the type converters and the associated properties appear as greyed out text (the namespace qualified type name to be exact). I assume that internally PropertyGrid uses reflection to create C's type converter instances but C is 'invisible'.
The problem is fixed by adding a reference to C in project A but this is undesirable since C may not actually exist for a particular installation.
Loading C dynamically from A (tried both Assembly.LoadFrom and AppDomain.Load) is successful - AppDomain.GetAssemblies reports C as loaded but the PropertyGrid still falls down.
Any ideas ?
Thanks in advance
Anders
|
|
|
|
|
try to use attributes
<br />
[Designer( "UtilityLibrary.Designers.WizardFormDesigner, UtilityLibrary.Designers, Version=1.0.4.0, Culture=neutral, PublicKeyToken=fe06e967d3cf723d" )]<br />
In bold is a sumbolic name of assembly. By such name Framework can find and load needed assembly. In your case look for Convert attributes:
<br />
[ Category( "Appearance" ), <br />
DefaultValue( -1 ),<br />
Description( "GET/SET toolbar item image from Image List" ),<br />
Editor("System.Windows.Forms.Design.ImageIndexEditor, System.Design, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor)),<br />
TypeConverter( "System.Windows.Forms.ImageIndexConverter" ) ]<br />
Such knowladge can help
Good Luck
Alex Kucherenko
|
|
|
|
|
Hi , when and how are .net attribs activated?
is it at compiletime?
if i create my own attrib and apply it to a class like this:
[MyAttrib("tjoflöjt")]
public class{
}
is the text "tjoflöjt" injected into the assembly somehow when compiling ,
or is an instance of my "MyAttrib" class created once the assembly is loaded into memmory?
attribs like "AssemblyXXX" can stop the compiler and notify the user on various things like ".snk file not found" , is it possible to do the same thing with my own attribs?
//Roger
|
|
|
|
|
|
I cann't understand how I should check for user in Active Directory.Evry time when I try to check for somethink in Active Directory thete rise this kind of exeption.
///////////////////////////////////////////////////////////////////////
try
{
DirectoryEntry entry = new DirectoryEntry("LDAP://ComputerName");
System.DirectoryServices.DirectorySearcher mySearcher = new
System.DirectoryServices.DirectorySearcher(entry);
mySearcher.Filter = ("objectClass=user");
foreach(System.DirectoryServices.SearchResult resEnt in
mySearcher.FindAll())
{
Console.WriteLine( resEnt.Path );
}
}
catch(System.Runtime.InteropServices.COMException ex)
{
Console.WriteLine(ex.Message);
}
////////////////////////////////////////////////////////////////////////////
Thank you.
|
|
|
|
|
I don't know the answer but I can point you to a resource for an example.Go to www.wrox.com and download in "Professionall C#" book.In one of its chapters there are good examples for Active Directory.Hope it helps.
Mazy
"And the carpet needs a haircut, and the spotlight looks like a prison break
And the telephone's out of cigarettes, and the balcony is on the make
And the piano has been drinking, the piano has been drinking...not me...not me-Tom Waits
|
|
|
|
|
try
{
DirectoryEntry entry = new DirectoryEntry("LDAP://ComputerName");
System.DirectoryServices.DirectorySearcher mySearcher = new
System.DirectoryServices.DirectorySearcher(entry);
mySearcher.Filter = ("objectClass=user");
search.SearchScope=SearchScope.Subtree;//search all directory
search.PropertiesToLoad.Add("name");//add return value from your search
foreach(System.DirectoryServices.SearchResult resEnt in
mySearcher.FindAll())
{
Console.WriteLine( resEnt.Path );
}
}
catch(System.Runtime.InteropServices.COMException ex)
{
Console.WriteLine(ex.Message);
}
|
|
|
|
|
I need to write a module for my program that will allow basic revision control of text files. I was wondering what is the best way to impliment this should i use a library? or should i just execute the commands myself?
Ive tried to use the .Net cvs library from the same people as sharp develop (http://www.icsharpcode.net/OpenSource/SharpCvsLib/default.asp) but i cant find any documentation for any of it... has anyone sucessfully used this library and if so could you give me some pointers.
Thanks
Tim
|
|
|
|
|
how to program with c# for exchange 2000
i want to get password in active directory .
how can i?
|
|
|
|
|
wangzhibin wrote:
active directory
I think System.DirectoryServices would help you here, not sure if it would allow to retrieve password.
For exchange server you can use CDO through COM Interop
- Kannan
|
|
|
|
|
Hi,
What's the "by the book" way under .NET to store application settings? (i.e. things you'd write to the registry under win32). I figure it's probably some XML file located with the app, but I need different data for different users, etc.
Italian is a beautiful language. amare means to love, and amara bitter.
sighist | Agile Programming | doxygen
|
|
|
|
|
|
I am developing an assambly .It is not a user control,but i want use System.Drawing.Color class. How should i do ?
waiting for answer.
thanks
SIMPLE IS BEAUTY
|
|
|
|
|
Add a reference to the System.Drawing.dll assembly.
The using statement (as it applies to namespaces and classes) just makes it so you don't have to type as much, it doesn't do anything to the actual code that is output. To actually use a new assembly you need to add a reference to it (in VS.NET right click on your project and choose Add Reference...on the commandline use the /ref:<assemblyname.dll> compiler switch).
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
