C# Discussion Boards - CodeProject

sundar1562-Aug-06 8:54

2-Aug-06 8:54

thanks for the reply...
But a
FileSystemWatcher can only watch for created ,Renamed ,Changed,Deleted Events...(i Have to generate an event when a user clicks on the folder or file i.e before he opens a file)

I should not allow the user to open the folder/File untill the Server(or an admin in the server machine) permits.

Any help is appreciated....

Luck is Opportunity with hardwork

Re: Network Access monitoring

Ingo2-Aug-06 12:39

Ingo

2-Aug-06 12:39

sundar156 wrote:
But a
FileSystemWatcher can only watch for created ,Renamed ,Changed,Deleted Events...(i Have to generate an event when a user clicks on the folder or file i.e before he opens a file)

I should not allow the user to open the folder/File untill the Server(or an admin in the server machine) permits.

Ok, now I see your problem. Well thats difficult. It has something to do with the rights management and I think it can't be solved easily.

I don't know a really good solution but I got an idea. You could just regret the user the access and allow your own application the access. A user has then to use this application to open a file/directory forbidden to him. Of course than it's possible to ask the admin.

Sound silly? Perhaps, but I don't know another way, yet. I haven't done anything with file rights management yet.

Sorry,
Ingo

------------------------------
PROST Roleplaying Game

War doesn't determine who's right. War determines who's left.

Problems using RegistryKey.OpenRemoteBaseKey()

b_girl1-Aug-06 10:42

b_girl

1-Aug-06 10:42

Hey, I keep getting the UnauthorisedAccessException from the following code - the user account I'm using to connect to the server in question does have permission to read/edit the registry. I have also modified the my routing table so I can access the server resources by name. If anyone could help me out I'd greatly appreciate it.

using System;<br />
using System.Security;<br />
using System.Security.Permissions;<br />
using Microsoft.Win32;<br />
<br />
[assembly: RegistryPermissionAttribute(SecurityAction.RequestMinimum, Read = @"HKEY_LOCAL_MACHINE\SOFTWARE\Network Associates\TVD\Shared Components\VirusScan Engine\4.0.xx")]<br />
[assembly: SecurityPermissionAttribute(SecurityAction.RequestMinimum, UnmanagedCode = true)]<br />
<br />
String KEY = "SOFTWARE\\Network Associates\\TVD\\Shared Components\\VirusScan Engine\\4.0.xx";<br />
<br />
try<br />
{<br />
	RegistryHive hKey = RegistryHive.LocalMachine;<br />
<br />
	RegistryKey DATKey = RegistryKey.OpenRemoteBaseKey(hKey, _ServerName).OpenSubKey(KEY);<br />
}<br />
...

It seems to get past the RegistryHive.LocalMachine part, but throws the exception when it gets to the open remote base key call. I tried separating the OpenRemoteBaseKey() and OpenSubKey() calls into 2 separate lines, to see if it was maybe OpenSubKey() that was throwing it, but the same exception was thrown on the OpenRemoteBaseKey() call.

Thanks.

Re: Problems using RegistryKey.OpenRemoteBaseKey()

leppie1-Aug-06 21:05

leppie

1-Aug-06 21:05

b_girl wrote:
UnauthorisedAccessException

It means you have to be authenticated and have permissions on the server.

xacc.ide-0.2.0.50 - now with partial MSBuild support!

Re: Problems using RegistryKey.OpenRemoteBaseKey()

b_girl2-Aug-06 4:00

b_girl

2-Aug-06 4:00

I am authenticating with the server and the account I'm authenticating with has permission to read/edit the registry. I'm doing the authentication when I connect - I'm using the Ras API to establish a VPN connection to the server.

Do I have to authenticate again after the connection is established?

Transfer of XML

RoadieGS1-Aug-06 10:18

RoadieGS

1-Aug-06 10:18

I have a C# .Net application which generates a XML file on the web server when the user clicks on a button. After that file is produced, I need to be able to push that xml file to the client machine (preferably with an open dialog box so the user can choose the destination). I am thinking this can be done with Response.Write, but I have not been successful. Thanks.

Re: Transfer of XML

Cadence2.01-Aug-06 10:56

Cadence2.0

1-Aug-06 10:56

You could use the WebClient class

Try this:

string URL = "http://www.somesite.com/filename.fileExtention";
string localLoc = "C:\\filename.fileExtention";
System.Net.WebClient c = new System.Net.WebClient();
c.DownloadFile(URL,localLoc);

You could use a browse dialog for the location to save the directory.

Hope that helps,

K

-K

Re: Transfer of XML

Cadence2.01-Aug-06 11:06

Cadence2.0

1-Aug-06 11:06

On second thoughts, I do not think this would work as you are writing from server to client. That's something I didn't register the 1st time around. oops. Sorry.

-K

Re: Transfer of XML

leppie1-Aug-06 21:02

leppie

1-Aug-06 21:02

Response.WriteFile()

xacc.ide-0.2.0.50 - now with partial MSBuild support!

Fundamental DirectX Question

eggie51-Aug-06 10:07

eggie5

1-Aug-06 10:07

On every DirectX sample I see the whole form and every aspect of drawing the controls/graphics on the form is handled exclusively by DirectX, ie overiding OnPaint().

My question is, is it possible to have just part of your application directX? e.g., I want to design a normal form w/ visual studio, and then add a little box on my form that will display some directx content. (Specifically, I just want to load 3d model and rotate it.)

Is this even possible? Maybe a directx control I can place on my form. I don't have any directx experience, can somebody please guide me?

/\ |_ E X E GG

Re: Fundamental DirectX Question

Ennis Ray Lynch, Jr.1-Aug-06 10:29

Ennis Ray Lynch, Jr.

1-Aug-06 10:29

Inherit from a control and override the controls onpaint event for your direct X. I did this for the star wars credits I placed in a system once. It works well.

A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."

-- Stephen Crane

Re: Fundamental DirectX Question

eggie51-Aug-06 10:32

eggie5

1-Aug-06 10:32

Do you have any examples?

/\ |_ E X E GG

Re: Fundamental DirectX Question

Ennis Ray Lynch, Jr.1-Aug-06 10:52

Ennis Ray Lynch, Jr.

1-Aug-06 10:52

Due to the signing of a non-compete no. However, if you understand direct X then it is a trivial task. If you do not understand direct X then you are asking the wrong questions. First I would research writing your own custom control, it will cover the on paint override, then just pass the control's handle to direct X

A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."

-- Stephen Crane

Re: Fundamental DirectX Question

User 66581-Aug-06 13:04

User 6658

1-Aug-06 13:04

I haven't tried it, but you might take a look at this article

modified 12-Sep-18 21:01pm.

Re: Fundamental DirectX Question

eggie51-Aug-06 20:46

eggie5

1-Aug-06 20:46

Thanks, that's just what I was looking for.

Actually now, I'm using a picturebox and direct 3d!

/\ |_ E X E GG

DataBindings for datagrid

Mohammed Elkholy1-Aug-06 9:37

Mohammed Elkholy

1-Aug-06 9:37

excuse me

first thanks for help

i want to set the DataBindings property for datagrid by dataview
but it send me an exception here is the code i wrote

DataView custadd=new DataView(customer.Tables["address"],"","",DataViewRowState.CurrentRows );
custadd.AllowEdit=true;
custadd.AllowNew=true;
custadd.AllowDelete=true;
custadd.Table =customer.Tables["address"];
custadd.RowFilter="cust_ID='"+txid.Text+"'";

dataGrid1.DataBindings.Add("DataSource",custadd, );

the databindings takes three arguments but i do not know the 3 argument

thanks

MD_NADA

MD_NADA

Socket code

NaNg152411-Aug-06 8:57

NaNg15241

1-Aug-06 8:57

can some1 recomend me of a good tcp\ip socket server code\snifft ? (if it can get multiple connections it will be better)

Re: Socket code

Cadence2.01-Aug-06 10:45

Cadence2.0

1-Aug-06 10:45

I liked this example a lot. It's an asynchronous TCP Server/Client.

http://codeguru.earthweb.net/csharp/csharp/cs_misc/sampleprograms/article.php/c7695/
http://codeguru.earthweb.net/csharp/csharp/cs_network/sockets/article.php/c8781/

Good Luck

-K

DataBinding to a detached row?

Paul Brower1-Aug-06 8:53

Paul Brower

1-Aug-06 8:53

Does anyone know how to overcome the DBNull.Value problem with databinding to a detached row?

When you bind to a detached row and any of the columns have a null value (DBNull.Value), an exception get's raised. It is impossible to use the DataBindings[idx].Format or DataBindings[idx].Parse to 'catch' the null value and change it, because you have to set the databinding before you can set the .Format and .Parse handlers, and the error gets thrown when you set the databinding.

... and no, I don't want to bind to a DataTable. I need to bind to a detached row.

Paul Brower

Re: DataBinding to a detached row?

Josh Smith1-Aug-06 9:32

Josh Smith

1-Aug-06 9:32

I'm assuming by 'detached row' you mean a DataRow that is not in a DataTable. Is that correct?
Why do you need to bind to a detached row? Why not just bind to a DataView which filters in only that row? What about binding to the ItemArray of the row instead?

:josh:
My WPF Blog[^]

Re: DataBinding to a detached row?

Paul Brower1-Aug-06 9:49

Paul Brower

1-Aug-06 9:49

Yes, 'detached' is not in the DataTable.

Binding to the itemarray would cause the same problems with the bindings.

Although I don't particularly like the solution, I have come up with one that works. Apparently the ability to have DBNull.Value passed to a databinding, and function properly, is tied to the DataSet level. If you have a detached row, going back up to the DataSet (row.DataTable.DataSet) will be null.

So, what I had to do, is create an Empty strongly typed dataset, and generate a new row from a table from this new dataset. I can then bind directly to the row (which is now NOT detached, but it is 'detached' from my main strongly typed dataset) and not have a problem with null column values.

Re: DataBinding to a detached row?

Josh Smith1-Aug-06 10:20

Josh Smith

1-Aug-06 10:20

Paul Brower wrote:
So, what I had to do, is create an Empty strongly typed dataset, and generate a new row from a table from this new dataset. I can then bind directly to the row (which is now NOT detached, but it is 'detached' from my main strongly typed dataset) and not have a problem with null column values.

Phew! Talk about building a street so that you can cross it!

:josh:
My WPF Blog[^]

Opening a image into a pictureBox from a OpenFileDialog

michmela441-Aug-06 8:37

michmela44

1-Aug-06 8:37

This may be a simple question, but I am writing a program that utilizes a pictureBox to show the currently selected picture. Below the pictureBox is a "Browse..." button that calls an openFileDialog. My question is, how to i get the picture selected to appear in the pictureBox. Or i guess a better question would be how to extract the path of the selected file from the openFileDialog so i can use it as I please.

Thanks in advance for any help.

Re: Opening a image into a pictureBox from a OpenFileDialog

stancrm1-Aug-06 8:45

stancrm

1-Aug-06 8:45

If you select a file in openFileDialog, you get the whole path and filename also. That means you can use :

this.pictureBox.Image = Image.FromFile(this.openFileDialog.Filename);

How to find out HD Size of a computer without using WMI

Cadence2.01-Aug-06 7:43

Cadence2.0

1-Aug-06 7:43

Hey there,

Is there any way to (programatically) find out the hard disk size of a computer without using WMI?

My best idea is to recurse through all the directories (externally calling dir/p) and find out how much space is taken by each directory and then adding it to the free space.

But that is quite cumbersome.

Any ideas?

-K

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