C# Discussion Boards - CodeProject

Xiao_M10-May-05 3:25

10-May-05 3:25

After some debugging etc. It seems that its a custom windows service thats trying to access those files (Service is setuped to use my user account details instead of local account).

Basically when I tried Directory.GetCreationTime(path) (C# App which is called by the services at certain timeperiod), it results in that error. I have an other C# app (with no ties to the services) and it works fine.

Any idea how to fix this?

Re: accessing network folders/files

Dave Kreskowiak10-May-05 3:44

Dave Kreskowiak

10-May-05 3:44

Is your service running under the Local System account? THe Local System account doesn't have any rights to network resources. You have to go into the Services manager and chagne the account it's running under to one that has rights to the network files your trying to get at.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: accessing network folders/files

Xiao_M10-May-05 3:52

Xiao_M

10-May-05 3:52

Yes , I have done that. It stills gives the same error. The user acount which the services uses has no problem accessing any network resources unless I use that C# program with the same services.

Re: accessing network folders/files

Dave Kreskowiak10-May-05 4:47

Dave Kreskowiak

10-May-05 4:47

If the application works as a normal application, the account you THINK your using isn't the one your actually using for the service. Did you include the Domain in the username portion? Like MYDOMAIN\useraccount...

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: accessing network folders/files

Xiao_M10-May-05 5:01

Xiao_M

10-May-05 5:01

Yes I did that aswell, it even wouldnt allow me to register using only my username (so I did made that mistake). The code which is trying to access the files is a dll, if I am right its loaded into the memory space of the service so it isnt the app trying to access it.

richText box uses to much CPU

Snowjim9-May-05 23:27

Snowjim

9-May-05 23:27

Hey!

I am displaying everything that comes in on the serialPort in a RichTextBox.

I have made a stress test program that sends as much as it can to my program through the serialPort.

The Performance startas out as normal, but after a while I notice that it goes from 10% up to 100% of CPU usage in about 2 min (depending on the threshold of the RecivedDataEvent(in this case 32 bits))?

On the RichTextBox i am using a scrool to bottom code like this:

<br />
                rtIncomeLogg.AppendText(inData);<br />
<br />
                if (AUTOSCROLL)<br />
                {<br />
                    rtIncomeLogg.HideSelection = false;<br />
                    rtIncomeLogg.Select(rtIncomeLogg.TextLength, 0);<br />
                }<br />

I have tryed do unhook the rtIncomeLogg.AppendText(inData); so no data is appended to the textbox, and by doing this it lays on 10%-15% CPU usage.

I thougt that maby the textbox is becoming full and have problem appending text at the bottom, so a tryed to remove data so the lenth not exided 5000, but i dident got this to work(used the richTextBox.text.remove(0,nrOver5000).

I realy need to display data little by little.

Do you got any ide how to fasten this up? Maby clipboard is an ide? Maby regular textbox is betther then richtextbox?

Best Regards
Jimmy

Re: richText box uses to much CPU

mav.northwind9-May-05 23:50

mav.northwind

9-May-05 23:50

The RichTextBox definitely isn't the best choice for this kind of output!

You could use a plain TextBox or, what I'd consider the best solution, a ListBox, where you can add entries, make the last entry visible and remove entries from the beginning of the list without too much trouble.
That way you can keep your logging entries to 100, 500, or whatever suits your needs.

mav

Re: richText box uses to much CPU

Snowjim9-May-05 23:55

Snowjim

9-May-05 23:55

Thanks!

I will test the plain TextBox. The ListBox would be some problems for me, the input on the serial port is not readed by row but read exisiting, this means that the rows will be strange.

Best Regards
SnowJim

Re: richText box uses to much CPU

S. Senthil Kumar10-May-05 0:06

S. Senthil Kumar

10-May-05 0:06

I bet your RecivedDataEvent comes in through a non UI thread. You must not call AppendText or for that matter any method/property at all on the textbox from within that thread.

You need to call BeginInvoke or Invoke to marshal the call to the UI thread. Have a look at http://www.codeproject.com/useritems/begininvoke.asp[^]. It explains why you need to do that and also tells you how to use BeginInvoke.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: richText box uses to much CPU

Snowjim10-May-05 0:11

Snowjim

10-May-05 0:11

Yes i am using Invoke, i know that only the creating thread would be operating on the object/control.

I have no tested the plain textbox and its MUCH faster it semes like, but it also uses alot more CPU.

now its starts on 50% and it increase a little.

I will run more testst.

The problem with plain textbox simes to be that it is not using the \r\n propperly? insted it becomes a square??

Is there any setting for this? in richtextbox this works fine!

Best Regards
SnowJim

Re: richText box uses to much CPU

S. Senthil Kumar10-May-05 0:30

S. Senthil Kumar

10-May-05 0:30

You can try System.Environment.NewLine

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: richText box uses to much CPU

S. Senthil Kumar10-May-05 0:35

S. Senthil Kumar

10-May-05 0:35

And did you try BeginInvoke instead of Invoke?

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: richText box uses to much CPU

Snowjim10-May-05 2:32

Snowjim

10-May-05 2:32

BeginInvoke helpt alot! Thanks!

Re: richText box uses to much CPU

mav.northwind10-May-05 2:20

mav.northwind

10-May-05 2:20

The plain TextBox uses just \n as line separator, while the RichTextBox uses \r\n.

Regards,
mav

'System.NullReferenceException' inside an Array

Vinnepin9-May-05 22:52

Vinnepin

9-May-05 22:52

Hey guys,

I got a little problem with an Array i made.

Here is the code:

<br />
using System;<br />
using MTV3D65;<br />
<br />
namespace Template<br />
{<br />
<br />
	/// <summary><br />
	/// Summary description for Grass.<br />
	/// </summary><br />
	public class GrassFactory<br />
	{<br />
<br />
		const float LandScapeSize = 256 * 8;   //the size of the landscape<br />
		const float GrassNumber = 200;         //the number of grassmeshes on a tile<br />
		const float NumberOfTiles = 12; <br />
<br />
		private int i;<br />
		private int x;<br />
		private int y;<br />
		private GrassType[,,] Grass;<br />
		private TVMesh[] GrassMeshes = new TVMesh[4];  //number of mesh types (grass, busg, rock...)<br />
<br />
		<br />
		//These variables are used internally. Don't f*** with them. :)<br />
		private float CamTilePosX;<br />
		private float CamTilePosY;<br />
		private float Distance;<br />
		private float DistX;<br />
		private float DistZ;<br />
		private float TranspDistance;<br />
		private float Transparency;<br />
		private float OneTileSize;<br />
		private float Denominator;<br />
		private float Transp2;<br />
<br />
		TVGlobals Globals;<br />
		TVEngine TV;<br />
<br />
<br />
		public GrassFactory(TVLandscape Land, TVScene Scene)<br />
		{<br />
			Globals = new TVGlobals();<br />
			TV = new TVEngine();<br />
<br />
			float PosX;<br />
			float PosZ;<br />
			float MeshRandom;<br />
			Random random = new Random();<br />
			<br />
			GrassType[,,] Grass = new GrassType[(int)NumberOfTiles, (int)NumberOfTiles, (int)GrassNumber];<br />
			  <br />
			OneTileSize = LandScapeSize / NumberOfTiles;<br />
			  <br />
			GrassMeshes[0] = Scene.CreateBillboard(Globals.GetTex("Tree01"), 0, 0, 0, 8, 4, "", true);<br />
			GrassMeshes[1] = Scene.CreateBillboard(Globals.GetTex("Tree02"), 0, 0, 0, 5, 6, "", true);<br />
			GrassMeshes[2] = Scene.CreateBillboard(Globals.GetTex("Tree03"), 0, 0, 0, 4, 7, "", true);<br />
			GrassMeshes[3] = Scene.CreateBillboard(Globals.GetTex("Tree04"), 0, 0, 0, 3, 2, "", true);<br />
			GrassMeshes[0].SetCollisionEnable(false);<br />
			GrassMeshes[1].SetCollisionEnable(false);<br />
			GrassMeshes[2].SetCollisionEnable(false);<br />
			GrassMeshes[3].SetCollisionEnable(false);<br />
			  <br />
			for (y = 0; y < (NumberOfTiles - 1); y++) <br />
			{<br />
				for (x = 0; x < (NumberOfTiles - 1); x++) <br />
				{<br />
					//Grass[x, y, 0].MeshType = (int)GrassNumber;   //IMPORTANT: this holds the number of meshes on this tile!!!! I know it's ugly but it works.<br />
					for (i = 1; i < GrassNumber; i++) <br />
					{<br />
						TV.AddToLog("X:" + x + " Y:" + y + " i:" + i);<br />
<br />
						PosX = OneTileSize * x + (float)random.NextDouble() * OneTileSize;<br />
						PosZ = OneTileSize * y + (float)random.NextDouble() * OneTileSize;<br />
						MeshRandom = (float)random.NextDouble();<br />
						Grass[x, y, i].Position.x = PosX;<br />
						Grass[x, y, i].Position.y = Land.GetHeight(PosX, PosZ);<br />
						Grass[x, y, i].Position.z = PosZ;<br />
						Grass[x, y, i].ColorR = 0.9f;<br />
						Grass[x, y, i].ColorG = 0.9f;<br />
						Grass[x, y, i].ColorB = 0.8f;<br />
						Grass[x, y, i].Size = Globals.Vector((float)random.NextDouble() * 0.4f + 0.8f, (float)random.NextDouble() * 0.4f + 0.8f, (float)random.NextDouble() * 0.4f + 0.8f);<br />
			          <br />
						if (MeshRandom > 0.2) <br />
						{      //Type of mesh<br />
							Grass[x, y, i].MeshType = 0;<br />
						}<br />
						else if (MeshRandom > 0.15) <br />
						{<br />
							Grass[x, y, i].MeshType = 1;<br />
						}<br />
						else if (MeshRandom > 0.1) <br />
						{<br />
							Grass[x, y, i].MeshType = 2;<br />
						}<br />
						else<br />
						{<br />
							Grass[x, y, i].MeshType = 3;<br />
						}<br />
					}<br />
				}<br />
			}<br />
			  <br />
			TranspDistance = OneTileSize * 0.9f;  //this is the range of transparent area. 0.9999: the meshes pop up, 0:everything is transparent at least a bit<br />
			  <br />
			Denominator = 1 / ((OneTileSize * OneTileSize) - (TranspDistance * TranspDistance)); //needed for calculation speedup<br />
			Transp2 = TranspDistance * TranspDistance;   //needed for calculation speedup<br />
		}<br />
<br />
		public void Render(MTV3D65.TV_3DVECTOR CamPos)  //this tells what tiles should be rendered. Campos is the camera's position vector<br />
		{<br />
			GrassMeshes[0].Enable(true);<br />
			GrassMeshes[1].Enable(true);<br />
			GrassMeshes[2].Enable(true);<br />
			GrassMeshes[3].Enable(true);<br />
			CamTilePosX = (CamPos.x - OneTileSize / 2) / OneTileSize;<br />
			CamTilePosY = (CamPos.z - OneTileSize / 2) / OneTileSize;<br />
<br />
			DrawSurround(CamTilePosX, CamTilePosY, CamPos);<br />
<br />
			if (CamTilePosX - 1 >= 0 && CamTilePosY - 1 >= 0) <br />
				DrawSurround(CamTilePosX - 1, CamTilePosY - 1, CamPos);<br />
			<br />
			if (CamTilePosY - 1 >= 0) <br />
				DrawSurround( CamTilePosX, CamTilePosY - 1, CamPos);<br />
		<br />
			if (CamTilePosX + 1 < NumberOfTiles && CamTilePosY - 1 >= 0) <br />
				DrawSurround( CamTilePosX + 1, CamTilePosY - 1, CamPos);<br />
			<br />
			if (CamTilePosX - 1 >= 0 && CamTilePosY + 1 < NumberOfTiles) <br />
				DrawSurround( CamTilePosX - 1, CamTilePosY + 1, CamPos);<br />
			<br />
			if (CamTilePosY + 1 < NumberOfTiles) <br />
				DrawSurround( CamTilePosX, CamTilePosY + 1, CamPos);<br />
			<br />
			if (CamTilePosX + 1 < NumberOfTiles) <br />
				DrawSurround( CamTilePosX + 1, CamTilePosY, CamPos);<br />
			<br />
			if (CamTilePosX + 1 < NumberOfTiles && CamTilePosY + 1 < NumberOfTiles) <br />
				DrawSurround( CamTilePosX + 1, CamTilePosY + 1, CamPos);<br />
			<br />
			if (CamTilePosX - 1 >= 0) <br />
				DrawSurround( CamTilePosX - 1, CamTilePosY, CamPos);<br />
			<br />
			GrassMeshes[0].Enable(false);<br />
			GrassMeshes[1].Enable(false);<br />
			GrassMeshes[2].Enable(false);<br />
			GrassMeshes[3].Enable(false);<br />
		}<br />
		<br />
		private void DrawSurround(float x, float y, MTV3D65.TV_3DVECTOR CamPos)<br />
		{<br />
			for (i = 1; i < Grass[(int)x, (int)y, 0].MeshType; i++) <br />
			{<br />
				GrassMeshes[Grass[(int)x, (int)y, i].MeshType].SetPosition(Grass[(int)x, (int)y, i].Position.x, Grass[(int)x, (int)y, i].Position.y, Grass[(int)x, (int)y, i].Position.z);<br />
				GrassMeshes[Grass[(int)x, (int)y, i].MeshType].SetScale(Grass[(int)x, (int)y, i].Size.x, Grass[(int)x, (int)y, i].Size.y, Grass[(int)x, (int)y, i].Size.z);    //you may disable this line to gain a few (5-6) FPS<br />
				DistX = Grass[(int)x, (int)y, i].Position.x - CamPos.x;<br />
				DistZ = Grass[(int)x, (int)y, i].Position.z - CamPos.z;<br />
				Distance = (DistX * DistX + DistZ * DistZ);<br />
<br />
				if (Distance > Transp2) <br />
				{<br />
					Transparency = 1 - ((Distance - Transp2) * Denominator);<br />
					if (Transparency > 0) <br />
					{<br />
						GrassMeshes[Grass[(int)x, (int)y, i].MeshType].SetColor(Globals.RGBA(Grass[(int)x, (int)y, i].ColorR, Grass[(int)x, (int)y, i].ColorG, Grass[(int)x, (int)y, i].ColorB, Transparency));<br />
						GrassMeshes[Grass[(int)x, (int)y, i].MeshType].Render();<br />
					}<br />
				}<br />
				else<br />
				{<br />
					GrassMeshes[Grass[(int)x, (int)y, i].MeshType].SetColor(Globals.RGBA(Grass[(int)x, (int)y, i].ColorR, Grass[(int)x, (int)y, i].ColorG, Grass[(int)x, (int)y, i].ColorB, 1));<br />
					GrassMeshes[Grass[(int)x, (int)y, i].MeshType].Render();<br />
				}<br />
					<br />
			}<br />
		}<br />
	}<br />
}<br />

And this is the GrassType class:

<br />
using System;<br />
using MTV3D65;<br />
<br />
namespace Template<br />
{<br />
	/// <summary><br />
	/// Summary description for GrassType.<br />
	/// </summary><br />
	public class GrassType<br />
	{<br />
<br />
		public int MeshType;<br />
		public MTV3D65.TV_3DVECTOR Position;<br />
		public MTV3D65.TV_3DVECTOR Size;   //maybe you don't need this<br />
		public float ColorR;<br />
		public float ColorG;<br />
		public float ColorB;<br />
<br />
		public GrassType()<br />
		{<br />
			MeshType = 0;<br />
			Position = new TV_3DVECTOR();<br />
			Size = new TV_3DVECTOR();<br />
			ColorR = 0;<br />
			ColorG = 0;<br />
			ColorR = 0;<br />
		}<br />
	}<br />
}<br />

I get my Error when i fist try to acces the array:
Grass[x, y, i].Position.x = PosX;

I really dont know why, because i init my array correcly (atleast i think).

Do u guys know what im doing wrong here?

Re: 'System.NullReferenceException' inside an Array

S. Senthil Kumar9-May-05 23:28

S. Senthil Kumar

9-May-05 23:28

Vinnepin wrote:
GrassType[,,] Grass = new GrassType[(int)NumberOfTiles, (int)NumberOfTiles, (int)GrassNumber];

You've only allocated memory for the array. For each index in that array, you need to call new GrassType() to allocate memory for each object, before attempting to use it.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: 'System.NullReferenceException' inside an Array

mav.northwind9-May-05 23:40

mav.northwind

9-May-05 23:40

You've allocated the array for your GrassType objects, but didn't instantiate the array elements.
Add
Grass[x,y,i] = new Grass();
after
MeshRandom = (float)random.NextDouble();
and you should be fine.

mav

How to unzip file whith C#???

Anonymous9-May-05 22:50

Anonymous

9-May-05 22:50

Fi all.
I need to write application that can over view ziped files
and for each one of them, show what's in it.
can someone give me some leads???

10x
Assaf

Re: How to unzip file whith C#???

Dan_P9-May-05 23:06

Dan_P

9-May-05 23:06

Have a look at this lib:

http://www.icsharpcode.net/OpenSource/SharpZipLib/Default.aspx[^]

help.about use xsl in C#

dagco9-May-05 22:02

dagco

9-May-05 22:02

Hi,everyone.
Recently,I transform a XML document using a xsl document in a project.I use
"document('')" to replace self.when I program by c#,I find it couldn't work .The XPATH word about "document('')" isn't explain,the c# word is
xslt.Transform(nav, null, s, null);
This is my xml
<?xml version="1.0" encoding="utf-8" ?>
<?xml-stylesheet type="text/xsl" href="viewer.xsl" ?>
<resultset>
<result>
<custname>Tom</custname>
<sex>2</sex>
<addr2>dfd</addr2>
<addr1>dff</addr1>
<customerid>145f3444-302f-407b-b6d5-c8aeaee9b253</customerid>
</result>
<result>
<custname>John</custname>
<sex>2</sex>
<addr2>ddd</addr2>
<addr1>sss</addr1>
<customerid>9099cc4d-ef82-47e6-ab3b-7b2c7d091a55</customerid>
</result>
</resultset>

This is my xsl ,it is in Cache
<?xml version="1.0" encoding="utf-8" ?>
<xsl:transform version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:map="maps.uri">
<xsl:template match="/resultset"><resultset><xsl:apply-templates />
</resultset>
</xsl:template><xsl:template match="result"><result><xsl:for-each select="*">
<xsl:variable name='atrname' select='name()'/><xsl:variable name='atrvalue' select='text()'/>
<
<xsl:value-of select='$atrname'/>
<xsl:if test="document('')/xsl:transform/map:stringmap[AttributeName=$atrname and AttributeValue=$atrvalue]/value!=''">
name="<xsl:value-of select="document('')/xsl:transform/map:stringmap[AttributeName=$atrname and AttributeValue=$atrvalue]/value" />"
</xsl:if>
>
<xsl:value-of select='$atrvalue'/>
</
<xsl:value-of select='$atrname'/>
>
</xsl:for-each>
</result>
</xsl:template>
<map:stringmap>
<AttributeName>sex</AttributeName>
<AttributeValue>1</AttributeValue>
<value>M</value>
</map:stringmap>
<map:stringmap>
<AttributeName>sex</AttributeName>
<AttributeValue>2</AttributeValue>
<value>F</value>
</map:stringmap>
</xsl:transform>

I want get the 'value''s value from the xsl if it can meet my need;It word well in IE.

What can I do ?

How to get table names and relations in oracle database?

oohungoo9-May-05 22:01

oohungoo

9-May-05 22:01

can any body help me?

Open a Word/Excel document without saving!

fatihsen9-May-05 22:01

fatihsen

9-May-05 22:01

Hello, I am trying to open a word or excel document in browser. However, each time it asks open,save,cancel with a dialog box. I want to only open the file. Is there any way to do this operation? I tried the code indicated below,but it opens always a dialog box with open,save,cancel buttons. I would be glad if someone help me.

Thanks.

Response.ClearContent();
Response.ClearHeaders();
Response.Clear();
Response.ContentType = "application/x-msexcel";
Response.Charset = "";
Response.AddHeader("Content-Disposition", "inline; filename=" + dokname); Response.AddHeader("Content-Length",fileLength);

Response.WriteFile(fileUrl);
Response.Flush();
Response.Close();

Fatih Sen

a problem with DataGrid

inew9-May-05 20:58

inew

9-May-05 20:58

Dear All,
In .Net, DataGrid allow mutiselect items is default.
I want a single select DataGrid. Can you help me?
Thanks!

quangthien

Re: a problem with DataGrid

esjq9-May-05 23:47

esjq

9-May-05 23:47

Hi!

Set the property RowHeaderVisible of the datagrid to false.

HTH Smile | :)

Passing a listbox to a method.

Anonymous9-May-05 19:58

Anonymous

9-May-05 19:58

Beginners question.
How do I pass listbox control to a class method and obtain access to the .items collection?

Can you point me to some sample code?

Thanks.

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