C# Discussion Boards - CodeProject

Re: How to get all the shares from a machine

matt23lucier9-Jun-08 7:17

matt23lucier

9-Jun-08 7:17

Thank you for the reply. I can get the shares on the local machine by using code (

Re: How to get all the shares from a machine

matt23lucier9-Jun-08 7:58

matt23lucier

9-Jun-08 7:58

Thanks for your reply. I can get the shares on my local machine but cannot get the shares another machine. The user who will be running this application has network admin privileges.

making a white black smooth animation

Sajjad Izadi9-Jun-08 6:39

Sajjad Izadi

9-Jun-08 6:39

hi friends and excuse for this long post,

i got some idea from greeeg about making a picture white and black. the method was:

public static bool GrayScale(Bitmap b)
{
	BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);

	int stride = bmData.Stride;
	System.IntPtr Scan0 = bmData.Scan0;

	unsafe
	{
               	//using a pointer to point to the colors of picture
		byte * p = (byte *)(void *)Scan0;

		int nOffset = stride - b.Width*3;

		byte red, green, blue;
            
		for(int y=0;y<b.height;++y)>
		{
			for(int x=0; x < b.Width; ++x )
			{
				blue = p[0];
				green = p[1];
				red = p[2];

				//changing the colors
				p[0] = p[1] = p[2] = (byte)(.299 * red + .587 * green + .114 * blue);

				p += 3;
			}
			p += nOffset;
		}
	}

	b.UnlockBits(bmData);
	return true;
}
</b.height;++y)>

it takes a picture as the argument and processes it to make it white and black.

then, again greeeg helped me and gave a method to make picture become white and black in a defined timings (like the smooth conversion of colored screen to grayscale when you click 'Turn Off' in strat menu in windows xp):

const float transitionTime = 5000f; // 5 seconds
float normalizedTransitionTime = millsecondsSinceTransitionStart / transitionTime;

red = (byte)Lerp(normalizedTransitionTime , coloredPixelR, bwPixelR);
green = (byte)Lerp(normalizedTransitionTime , coloredPixelG, bwPixelG);
blue = (byte)Lerp(normalizedTransitionTime , coloredPixelB, bwPixelB);

and said that the Lerp method is actually works like this:

float Lerp(float amount, float value1, float value2)
{
   return value1 + (value2 - value1) * amount;
}

for conversion of a picture from colored state to gray scale in a time like 500 milliseconds i merged the above ideas (of greeeg).
so i changed the first 'GrayScale(Bitmap b)' method to this:

public static bool GrayScale(Bitmap b)
{
	BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);

	int stride = bmData.Stride;
	IntPtr Scan0 = bmData.Scan0;

	unsafe
	{
		byte * p = (byte *)(void *)Scan0;

		int nOffset = stride - b.Width*3
	              byte red, green, blue;
	            
		for(int y=0;y<b.height;++y)>
		{
			for(int x=0; x < b.Width; ++x )
			{
				blue = p[0];
				green = p[1];
				red = p[2];

			//my changings start here

		                p[0] = (byte)Form1.Lerp(1f, (float)p[0], (float)(.114 * blue));
  			        p[1] = (byte)Form1.Lerp(1f, (float)p[1], (float)(.587 * green));
		                p[2] = (byte)Form1.Lerp(1f, (float)p[2], (float)(.299 * red));

			//end of my changings

		    		p += 3;
			}
			p += nOffset;
		}

	}

	b.UnlockBits(bmData);
	return true;
}
</b.height;++y)>

i have just changed the poinings of second 'for'
for example 'p[0]' is as blue in 'blue = (byte)Lerp(normalizedTransitionTime , coloredPixelB, bwPixelB)'

and the result was unsuccessful
have i done a correct work till now? (ofcourse not Smile | :)

)

i think the problem is in choosing the second and third arguments of 'Lerp (normalizedTransitionTime , coloredPixelR, bwPixelR)'.

finally, my questions are:
1- what should the arguments be then?

2- can i change Red, Green and Blue colors of picture (to make it gray scale) in an other way (without using the pointers in 'GrayScale(Bitmap b)')?

Re: making a white black smooth animation

Christian Graus9-Jun-08 6:40

Christian Graus

9-Jun-08 6:40

Sajjad Izadi wrote:
can i change Red, Green and Blue colors of picture (to make it gray scale) in an other way (without using the pointers

Yes, but it would be much slower. This is the fastest way to do it. Sounds like someone else has done all the work for you so far. I'm not sure what you're asking exactly, 'the result was unsuccessful' doesn't tell us much.

Christian Graus

Please read this if you don't understand the answer I've given you

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: making a white black smooth animation

Sajjad Izadi9-Jun-08 6:49

Sajjad Izadi

9-Jun-08 6:49

i don't know how to use these two methods to make a smooth conversion of colored picture to a gray scale one in a ditinct time.

yes, i myself never could guess to use such pointers to do my work. i'm learning from the friends.

Re: making a white black smooth animation

Christian Graus9-Jun-08 7:26

Christian Graus

9-Jun-08 7:26

Well, not sure why I would help you if I get a 1 vote for my trouble, but, the fact is, for bigger images, you probably can't. You'd need to create the individual frames first, THEN roll through them, for it to be smooth.

Re: making a white black smooth animation [modified]

Sajjad Izadi9-Jun-08 7:49

Sajjad Izadi

9-Jun-08 7:49

you mean to make the frames as an *.jpg in a folder and start to play them in my form like an animation. so the new and i think main question is "how is making a half grayed picture to produce the frames"?
i mean a picture which is not completely colord nor completely gray.

modified on Monday, June 9, 2008 2:04 PM

Re: making a white black smooth animation

Christian Graus9-Jun-08 13:25

Christian Graus

9-Jun-08 13:25

Actually, an easier way to do all this. Create your grey image. Then draw it on top of the color one over and over with varying transparency, which you get by setting the opacity of the ImageAttributes class.

Changing IIS Settings

Yourbuddypal9-Jun-08 5:52

Yourbuddypal

9-Jun-08 5:52

I am trying to programmatically change the IIS settings for a folder. I have been following the following article, which shows how to use the DirectoryEntry class to manage active directory settings: http://www.codeproject.com/KB/system/everythingInAD.aspx#10

This code has been working to change the settings for the root directory of my folder, the IISROOT/MyAPP folder. My problem is that I need to change IIS settings for the IISROOT/MyAPP/Child folder, but have not been able to get a handle to the child folder using the DirectoryEntry. Is there a way that I can get a DirectoryEntry variable for this child folder, so that I can change the appropriate settings?

Re: Changing IIS Settings

Yourbuddypal9-Jun-08 8:33

Yourbuddypal

9-Jun-08 8:33

I figured it out. Before setting the path for the MyAPP directory, I created the child directory as an "IIsWebDirectory". When I properly set the path for the parent, the child directory was appropriately filled with files.

Namespace?

#realJSOP9-Jun-08 5:27

#realJSOP

9-Jun-08 5:27

I want to genericize a class so that it can be used in any application. This class loads application settings. The problem is that in order to load the application's settings, I have to use the application's namespace (?) to do it, like so:

namespace MyApp
{
    public class AppSettings
    {
        public AppSettings() 
        {
           somevar =  MyApp.Settings.Default...
        }
    }
}

How do I change it to something like this:

namespace MyApp
{
    public class AppSettings
    {
        public AppSettings() 
        {
           myapp = SomeMagicHappensHere();
           somevar =  myapp.Settings.Default.blah blah blah
        }
    }
}

When I hover over MyApp in the constructor show in the first example, it shows the type as "namespace", but I apparently can't cast to that type (or I'm doing it wrong).

Can anyone help?

"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." - Jason Jystad, 10/26/2001

Re: Namespace?

Judah Gabriel Himango9-Jun-08 5:37

Judah Gabriel Himango

9-Jun-08 5:37

John,

Right, MyApp is the namespace, just like System is the namespace for System.String. Namespaces aren't types by themselves, so you can't do things to them like you would to classes.

Would something like this work?

public AppSettings(ApplicationSettingsBase settings)
{
}

ApplicationSettingsBase is the base class for all project settings. You would construct your AppSettings class like this:

AppSettings settings = new AppSettings(MyApp.Settings.Default);

Is that what you're looking for?

Life, family, faith: Give me a visit.

From my latest post: "How differently the psalmist saw it! How blessed -- how truly happy with real joy! -- is the man who delights in the Law of the Lord."

Judah Himango

Re: Namespace?

#realJSOP9-Jun-08 5:53

#realJSOP

9-Jun-08 5:53

Trees/Forest/Blind - many thanks. Smile | :)

CVS update failed

humayunlalzad9-Jun-08 4:17

humayunlalzad

9-Jun-08 4:17

In C:\abc\PiPe Modules\pipe\PiPe\source: "C:\Program Files\CVSNT\cvs.exe" -q update -P -d 
ObjectFlatten.cs
CVSROOT=:pserver:vgcoder2@192.168.2.137:2401/piperoot

C ObjectFlatten.cs

Error, CVS operation failed

Tortoise Tip:  One or more of your files has a conflict.  This means that someone else has altered the 
same part of the file as you.  Look above for the files marked "C ", and manually edit them to resolve 
the conflict.

Unable to understand what the problem could be

Re: CVS update failed

benjymous9-Jun-08 5:05

benjymous

9-Jun-08 5:05

humayunlalzad wrote:
Unable to understand what the problem could be

I'm guessing that it might be:

humayunlalzad wrote:
One or more of your files has a conflict. This means that someone else has altered the same part of the file as you. Look above for the files marked "C ", and manually edit them to resolve the conflict.

--
Help me! I'm turning into a grapefruit!
Buzzwords!

Re: CVS update failed

Ashfield9-Jun-08 21:42

Ashfield

9-Jun-08 21:42

I assume CVS is your source code evrsion manager, so the answer is really in the Tortoise Tip -

humayunlalzad wrote:
One or more of your files has a conflict. This means that someone else has altered the same part of the file as you. Look above for the files marked "C ", and manually edit them to resolve the conflict.

Bob
Ashfield Consultants Ltd

XML Writer and the ampersand

ranro20069-Jun-08 3:37

ranro2006

9-Jun-08 3:37

You know how the xml writer automatically makes the ampersand character (&) into it’s character entity reference ‘&’. Is there anyway of preventing it from doing this. I am working with an application that does not read the file the xml writer creates with an xml parser, therefore the character entity reference ‘&’ reference never gets parsed back to an ampersand. This is causing an error with the application because it does not understand the ‘&’.

Re: XML Writer and the ampersand

leppie9-Jun-08 3:45

leppie

9-Jun-08 3:45

IF you dont quote & it is not valid XML any more.

But if you really want it, just write out the file using the XmlWriter, and then just read over the created file/stream and replace & with &.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

Re: XML Writer and the ampersand

PIEBALDconsult9-Jun-08 5:46

PIEBALDconsult

9-Jun-08 5:46

Fix the application that does the reading.

How to execute an SQL statement from a DataSet?

bouli9-Jun-08 3:29

bouli

9-Jun-08 3:29

Hello gurus,

I have a request for you.

I have imported a flat file (delimited text file) into a DataTable from a DataSet. I wish to run an SQL statement such as "SELECT toto as X, count(titi) as Y from MY_TABLE GROUP BY X, ORDER BY X" where 'toto' and 'titi' are field from the MY_TABLE.

How is it possible to do that in C#?

I hope my question is clear. If not, let me know, I'll try to explain in better way.

Best regards.

Fred.

There is no spoon.

Re: How to execute an SQL statement from a DataSet?

leppie9-Jun-08 3:32

leppie

9-Jun-08 3:32

You can use LINQ for that if you have VS2008, else it's not really possible.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

Re: How to execute an SQL statement from a DataSet?

Vimalsoft(Pty) Ltd9-Jun-08 4:02

Vimalsoft(Pty) Ltd

9-Jun-08 4:02

hi bouli

Firstly your Question is not Clear , you have imported a Flat File into a Datatable from a Dataset, its not making sense at all. Please Tell us Step by Step and show us your code, where you import and so we can understand what you mean and we will take it from there.

Hope it helps

Vuyiswa Maseko,

Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding

VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
vuyiswam@tshwane.gov.za

Re: How to execute an SQL statement from a DataSet?

bouli9-Jun-08 4:40

bouli

9-Jun-08 4:40

Okay,

Sorry for my poor english.

I have sucessfully imported a CSV file into a DataSet.

I need to execute an SQL statement using COUNT, GROUP BY and ORDER BY. The request is done and works fine. I need to run it in C#.

While the data remain in a DataSet, I would like to know how I can execute the SQL statement on this DataSet?

Best regards.

Fred.

There is no spoon.

Re: How to execute an SQL statement from a DataSet?

Vimalsoft(Pty) Ltd9-Jun-08 5:02

Vimalsoft(Pty) Ltd

9-Jun-08 5:02

Hi man
here is the Code.

public Dataset GetData()
      {
          Dataset dsdata = new Dataset();
          /* As you said you, you have Successfully imported data into the Dataset
          * So, i dont know how you did it, but you should end up with the same thing as 
           * the above decleation of a Dataset and the Following Code will show you how to query a Dataset
           * 
           */
          String Constr = @"User ID=sa;Password=;Database=MyDB; Server =MYSERVER";

          SqlConnection con = new SqlConnection(Constr);  

          SqlCommand cmdselect = new SqlCommand("SELECT toto as X, count(titi)as Y from MY_TABLE GROUP BY X, ORDER BY X");
          
          cmdselect.CommandTimeout = 0 ;

          cmdselect.Connection = con; 

          SqlDataAdapter da = new SqlDataAdapter(cmdselect);
          //This is the Most important Part, if you have one table from the Dataset,you can leave it like this 
          da.Fill(dsdata);

          return dsdata;

      }

Tell me if you have Problems (vuyiswamb) Skype

Re: How to execute an SQL statement from a DataSet?

bouli9-Jun-08 5:17

bouli

9-Jun-08 5:17

Hi,

As I said, the data are already in a DataSet loaded in memory from a CSV file and not in a database.

Best regards.

Fred.

There is no spoon.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.