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Hello,
i would like to know if its possible to build an application that can SANDBOX an monitor an EXE.
this is part of an application i am building for a project in university. i'm building a prototype of a behavior based antivirus.
techniques used:
-Signature detection using the CLAMWIN AV database. "as it is the most common method"
-N-grams "a new way to detect malicious code using N-grams more commonly used in NLP"
-sanboxing "which is what all the AV companies say they do"
any feedback would be appreciated.
thank you
Mohamed Hossam
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yes EliottA like a virtual machine, but not with the interface. preferably something like sanboxie..
thx.
modified on Friday, January 29, 2010 3:41 PM
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You may want to consider running the app within its own AppDomain - also see System.AddIn.
/ravi
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i'll try that.
Ravi Bhavnani wrote: You may want to consider running the app within its own AppDomain - also see System.AddIn.
/ravi
thx Ravi.
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Hello Guys,
Need some help from you guys.
I have Generic List having a Class object.
I have added around 3000000 items in the list
List <CTempClass> lsTemp = new List <CTempClass> ();
when i tried to Serialize the with binary formater it is working fine
but when I deserialize the List it takes a lot of time around 30 Seconds.
But when i fill the Generic List with any datatype like
List<ulong> lsTemp = new List<ulong>();
and follow the same procedure the speed difference is drastic the while thing deserializes in 1 -2 Seconds
My Class object is Declared Serializable.
I dont understand why it is serialzer is behaving like this.
Am i Missing something.
Here is the Sample Code :
List<CTempClass> lsTemp = new List<CTempClass>();<br />
<br />
for(int i=0; i < 5000000;i++)<br />
{<br />
CTempClass oTemp = new CTempClass();<br />
oTemp.ID = i;<br />
lsTemp.Add(oTemp);<br />
oTemp=null;<br />
}<br />
<br />
using (Stream stream = File.Open("c:\\data.bin", FileMode.CreateNew))<br />
{<br />
BinaryFormatter bin = new BinaryFormatter();<br />
bin.Serialize(stream, lsTemp );<br />
<br />
}<br />
<br />
using (Stream stream = File.Open("c:\\data.bin", FileMode.Open))<br />
{<br />
BinaryFormatter bin = new BinaryFormatter();<br />
var lsTemp1 = bin.Deserialize(stream);<br />
<br />
}
here is the code of temp class
[Serializable]<br />
public class CTempClass : ISerializable <br />
{<br />
<br />
<br />
private ulong m_uCrc64; <br />
<br />
public CTempClass ()<br />
{<br />
m_uCrc64 = 0; <br />
}<br />
<br />
public CTempClass (SerializationInfo info, StreamingContext ctxt)<br />
{<br />
m_uCrc64 = info.GetUInt64("m_uCrc64");<br />
<br />
}<br />
<br />
public void GetObjectData(SerializationInfo info, StreamingContext ctxt)<br />
{<br />
<br />
info.AddValue("m_uCrc64", m_uCrc64);<br />
<br />
}<br />
<br />
}
Can any one please tell me why it is taking so much of time.
Any suggestion will be a great help
abhinav
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One of the most obvious differences is between value types and references. It takes time to allocate memory for 3 million objects.
I know the language. I've read a book. - _Madmatt
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The actal test had 5 million.
I would say thats 5/3 slower still than 3 million.
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You won’t be able to improve significantly performance while using .Net built in serializers. They are inheritably slow. I bumped into this many times. If performance is an issue I would recommend considering implementing custom destabilization (another word for “read you file and parse data in you code”).
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Hello Ilia,
can you please give me any example or some link for cusuom deserialization to start of with it would be a great help
abhinav
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Well, what I basically recommend using StreamWriter, StreamReader class to write to file /read from the file data stored in your objects. The approach requires specifying format of the file and how pieces of the data stored / retrieved from the file.
When applied to your example is might look something like this
<code>
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Serialization;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Diagnostics;
namespace ConsoleApplication1
{
public class CTempClass
{
public int m_uCrc64;
public int M_uCrc64
{
get
{
return m_uCrc64;
}
set
{
m_uCrc64 = value;
}
}
public CTempClass()
{
m_uCrc64 = 0;
}
}
class Program
{
static void Main(string[] args)
{
List<CTempClass> lsTemp = new List<CTempClass>();
for (int i = 0; i < 1000000; i++)
{
CTempClass oTemp = new CTempClass();
oTemp.m_uCrc64 = i;
lsTemp.Add(oTemp);
oTemp = null;
}
Stopwatch s = new Stopwatch();
s.Start ();
using (Stream stream = File.Open("c:\\data.bin", FileMode.Create))
{
BinaryWriter writer = new BinaryWriter(stream);
foreach (CTempClass instance in lsTemp)
writer.Write(instance.M_uCrc64);
writer.Close();
}
s.Stop();
System.Console.WriteLine ("Serialize " + s.Elapsed.TotalMilliseconds + " mils");
s.Reset();
s.Start();
byte[] buffer = File.ReadAllBytes ("c:\\data.bin");
lsTemp = new List<CTempClass>();
using (MemoryStream stream = new MemoryStream(buffer))
{
BinaryReader reader = new BinaryReader(stream);
try
{
while (true)
{
int i = reader.ReadInt32();
CTempClass oTemp = new CTempClass();
oTemp.m_uCrc64 = i;
lsTemp.Add(oTemp);
oTemp = null;
}
}
catch (EndOfStreamException)
{
reader.Close();
}
}
s.Stop();
System.Console.WriteLine("Deserialize " + s.Elapsed.TotalMilliseconds + " mils");
}
}
}
</code>
modified on Monday, February 1, 2010 11:23 AM
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hi...to all...
plz help me...
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Go here[^].
Unless you want to do it from code, in wich case you might want to give some more details
I are Troll 
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yaahhhhhhh.....Eddy Vluggen
its like ..how to decrease line spacing for paragragh in word document
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i mean......im asking code ....i wrote code like dis....
Microsoft.Office.Interop.Word.Paragraph oPara1;
oPara1 = oDoc.Content.Paragraphs.Add(ref oMissing);
oPara1.Format.SpaceAfter = 0;
oPara1.Range.Start = 0;
oPara1.Range.End = 0;
oPara1.Range.ParagraphFormat.LineSpacing = oWord.MillimetersToPoints(0.7f);
oPara1.Range.ParagraphFormat.LeftIndent = 0.70f;
oPara1.Range.ParagraphFormat.LineSpacingRule = WdLineSpacing.wdLineSpaceExactly;
oPara1.Range.ParagraphFormat.SpaceAfter = oWord.MillimetersToPoints(0F);
oPara1.Range.ParagraphFormat.SpaceBefore = oWord.MillimetersToPoints(0f);
oPara1.Range.ParagraphFormat.SpaceAfterAuto = 0;
oPara1.Range.ParagraphFormat.SpaceBeforeAuto = 0;
oPara1.Range.Text = "Sigma LLC\n 501 hyd Rd, Suite 105\n";
oPara1.Range.InsertParagraphBefore();
oPara1.Range.AutoFormat();
but i cant getting sapce in b/w that adress...line by line..with spaces
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ravindra chintha wrote: i mean......im asking code ....i wrote code like dis....
Microsoft.Office.Interop.Word.Paragraph oPara1;
Does it work with a LineSpacingRule of "wdLineSpaceDouble"?
ravindra chintha wrote: but i cant getting sapce in b/w that adress...line by line..with spaces
The space is defined in your code with a LineSpacing of 0.7. That's also the suggested property according to this[^] article.
Does it help to decrease the value, or does changing the value have no effect at all?
I are Troll
modified on Friday, January 29, 2010 12:39 PM
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Hello,
I want to build an application for writing text in textbox using speech recognition. i.e. if i speak "This is my first application" it should be displayed on textbox.
I have tried but failed. Here is my code.
System.Speech.Recognition.SpeechRecognitionEngine recognizer;
private void Form3_Load(object sender, EventArgs e)
{
recognizer = new System.Speech.Recognition.SpeechRecognitionEngine();
GrammarBuilder dictaphoneGB = new GrammarBuilder();
GrammarBuilder dictation = new GrammarBuilder();
dictation.AppendDictation();
dictaphoneGB.Append(new SemanticResultKey("StartDictation", new SemanticResultValue("Start Dictation", true)));
dictaphoneGB.Append(new SemanticResultKey("DictationInput", dictation));
dictaphoneGB.Append(new SemanticResultKey("EndDictation", new SemanticResultValue("Stop Dictation", false)));
GrammarBuilder spelling = new GrammarBuilder();
spelling.AppendDictation("spelling");
GrammarBuilder spellingGB = new GrammarBuilder();
spellingGB.Append(new SemanticResultKey("StartSpelling", new SemanticResultValue("Start Spelling", true)));
spellingGB.Append(new SemanticResultKey("spellingInput", spelling));
spellingGB.Append(new SemanticResultKey("StopSpelling", new SemanticResultValue("Stop Spelling", true)));
GrammarBuilder both = GrammarBuilder.Add(dictaphoneGB, spellingGB);
Grammar grammar = new Grammar(both);
grammar.Enabled = true;
grammar.Name = "Dictaphone and Spelling ";
recognizer.LoadGrammar(grammar);
recognizer.SetInputToDefaultAudioDevice();
recognizer.RecognizeAsync(RecognizeMode.Multiple);
recognizer.SpeechRecognized += OnSpeechRecognized;
}
private void OnSpeechRecognized(object sender, System.Speech.Recognition.SpeechRecognizedEventArgs e)
{
textBox1.Text = e.Result.Text;
}
There is no output.
Please help me i am new to speech recognition.
Thanks in advance.
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Give us more information on your problem. You have an exception, no sound... ?
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Thank you for reply.
And i am sorry for my late reply.
I am not getting any response from the application, if i speak into Mic there is no response, it does not go into the speech_recognized() event.
So i really don't understand what is going wrong.
Please help me.
Thanks in advance.
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No sound, the problem may be the input device which is not the default one.
I will try to replay your sample
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hi friends,
i am trying to blend the edges of the polygon region can any one help me to do so..
regards
Samir
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Hi All,
I am using third party COM dll. In my machine it is working fine. but its not working on any other machine event registering dll. I got below error
System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {E064BB22-22CE-4E01-BB63-10EF4058CAF9} failed due to the following error: 80040154.
What is the error exactly? any body can explain?
Thanking You,
Sunil G.
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Google gives loads of results for "error: 80040154" - MSDN[^] is probably the most usefull.
All those who believe in psycho kinesis, raise my hand.
My ![Badger | [badger,badger,badger,badger...]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/badger.gif) 's gonna unleash hell on your ass. tastic!
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Ever heard of "google"? It's that new-fangled search engine that's been available on the web for more than ten years...
.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 every one !
I'm a beginer in this forum and I'm researching about network computer.
I need a source code of a program as multichat to researching fastly.I tried to search source code VC# about this but can't.
I hope receive many helping !
Thanks all !
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