C# Discussion Boards - CodeProject

Re: MAC ADDRESS

Henry Minute13-Jul-09 0:10

Henry Minute

13-Jul-09 0:10

sanforjackass wrote:
What can I Do?

You really seem to be out of your depth with this problem, you are asking questions about the most basic of .NET programming operations (how to add a reference, for example) so I would suggest that what you can do is to get a beginners book on C# and .NET and work through it carefully. There are several free ones on the web some for those totally new to programming and some for those transferring from other languages. A forum like this is not the place to be spoon-fed, solutions.

To answer your most recent problem. The error is being caused because there is either no such thing as theCurrentObject["MACAddress"] i.e. no such member, or, more likely, the content of theCurrentObject["MACAddress"] is null. So test for null before trying to access it and act on the result of that test.

Henry Minute

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Re: MAC ADDRESS

sanforjackass13-Jul-09 0:39

sanforjackass

13-Jul-09 0:39

I Want My Own Mac Address How Can I Get It?

Re: MAC ADDRESS

Henry Minute13-Jul-09 0:45

Henry Minute

13-Jul-09 0:45

J4amieC has told you how to find out what is going wrong in your code.

Follow his advice.

If you are unable to resolve the problem by doing that, you might try Googling for getting mac address for computer. I did and got loads of hits. If you want to cut down on the number, refine the search, try getting mac address for computer c#.

Re: MAC ADDRESS

#realJSOP13-Jul-09 1:02

#realJSOP

13-Jul-09 1:02

sanforjackass wrote:
I Want My Own Mac Address How Can I Get It?

People aren't generally assigned their own MAC address, so I think your only recourse is to purchase a network card. Each one comes with a MAC address.

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Re: MAC ADDRESS

#realJSOP13-Jul-09 2:15

#realJSOP

13-Jul-09 2:15

Dude, you're a complete retard, aren't you...

Re: MAC ADDRESS

#realJSOP13-Jul-09 1:04

#realJSOP

13-Jul-09 1:04

From the other stuff you posted, I'm surprised that you understand the concept of a namespace.

Re: MAC ADDRESS

#realJSOP13-Jul-09 0:28

#realJSOP

13-Jul-09 0:28

Which MAC address?

Re: MAC ADDRESS

sanforjackass13-Jul-09 0:43

sanforjackass

13-Jul-09 0:43

Network Adapter

Re: MAC ADDRESS

#realJSOP13-Jul-09 1:00

#realJSOP

13-Jul-09 1:00

Which network adapter?

Store updated data from datagridview to sqlserver2000

elci12-Jul-09 21:13

elci

12-Jul-09 21:13

Hi,

I have a doubt in datagridview. I'm retrieving data from sql to datagridview. Now my problem is that i have to edit the data and store the new data into the sql again.plz help......

Thanks in advance..

Re: Store updated data from datagridview to sqlserver2000

dan!sh 12-Jul-09 21:31

dan!sh

12-Jul-09 21:31

This[^] is how it can be done.

Re: Store updated data from datagridview to sqlserver2000

elci12-Jul-09 22:47

elci

12-Jul-09 22:47

Thanks, but this code is not working i have already implemented this code. can u send me another code for saving the updated values into the database.

Thanks in advance........

read video stream from IP Address on 80 port assigned to DVR

kunal.tawde12-Jul-09 20:37

kunal.tawde

12-Jul-09 20:37

Hi,

I have 4 different cameras located in my home.
These 4 cameras are connected to 4 channel DVR.
DVR store recorded video stream data in raw format on one attached hard disk drive.
I assign static IP address to this DVR, and DVR throws video streams on this IP address and 80 port.

Are there any ways to read video streams from this IP address and 80 port of DVR.

Regards,
Kunal.

Re: read video stream from IP Address on 80 port assigned to DVR

#realJSOP13-Jul-09 1:05

#realJSOP

13-Jul-09 1:05

My guess would be "yes".

Re: read video stream from IP Address on 80 port assigned to DVR

kunal.tawde13-Jul-09 21:14

kunal.tawde

13-Jul-09 21:14

Request you to please give me some method description of how i can do this in C# or C++/MFC.

c#:how to install new font?

lhong100112-Jul-09 19:00

lhong1001

12-Jul-09 19:00

first:i use two functions to install a new font int the following.

AddFontResource("d:\\tmp\\Ni7seg.ttf"); //FilePath为字体
SendMessage((IntPtr)0xFFFF, WindowsMessages.WM_FONTCHANGE, IntPtr.Zero, IntPtr.Zero);

second:i don't konw how to use the new font.how to set the label's text with the new font?who can give me a example?very thanks

Re: c#:how to install new font?

dan!sh 12-Jul-09 21:44

dan!sh

12-Jul-09 21:44

A label has a font property. You can use that to set the font for the Label text.

Re: c#:how to install new font?

lhong100112-Jul-09 22:15

lhong1001

12-Jul-09 22:15

i know that.i mean i have a font file(.ttf),my program first load this font to memcry.
but i don't know how to let the label to display text with the font.
i know one waw can get it.for exam:

System.Drawing.Text.PrivateFontCollection pfc = new System.Drawing.Text.PrivateFontCollection();
pfc.AddFontFile("d:\\tmp\\Ni7seg.ttf");
Font myFont = new Font(pfc.Families[0], 80f, FontStyle.Regular, GraphicsUnit.Point, 0);

but my program is running in wince that don't support "System.Drawing.Text.PrivateFontCollection".
so who know how to implement this through winapi.

Re: c#:how to install new font?

Pete O'Hanlon12-Jul-09 22:46

Pete O'Hanlon

12-Jul-09 22:46

If you use Reflector, you can easily dig out the internals of how PrivateFontCollection works, and wrap up your own implementation using just the bits you need. (Here's a hint - I just took a quick peek using Reflector and found that adding a new font relies on:

[DllImport("gdiplus.dll", CharSet=CharSet.Unicode, SetLastError=true, ExactSpelling=true)]
internal static extern int GdipPrivateAddMemoryFont(HandleRef fontCollection, HandleRef memory, int length);

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Re: c#:how to install new font?

dan!sh 12-Jul-09 22:53

dan!sh

12-Jul-09 22:53

Not sure. See if this[^] helps. Looks somewhat similar to what you are doing.

Deleting a Registry Key Gives a Security Exception

Richard Andrew x6412-Jul-09 17:37

Richard Andrew x64

12-Jul-09 17:37

My program creates a registry key under HKEY_CURRENT_USER\Software.

There is no problem creating the key or creating values underneath it.

However the framework throws an UnauthorizedAccessException when I try to delete the key using the "DeleteSubKey" method of the RegistryKey class.

The program is running as the same user that created the key.

This is on Vista SP2.

What could I be missing? I thought that a user has total access to keys underneath HKEY_CURRENT_USER?

Re: Deleting a Registry Key Gives a Security Exception

Richard Andrew x6412-Jul-09 17:47

Richard Andrew x64

12-Jul-09 17:47

Never mind!

I found out that I'm supposed to open the key with delete-access to begin with.

Thanks for reading my post.

How do i select the radiobutton depending on the info on my textbox?

daffy_200312-Jul-09 16:31

daffy_2003

12-Jul-09 16:31

hi.
I need help in this.

I have a textbox and two radiobutton.
For example, If the data in the textbox is yes, I want the yes button to be selected. If the data in the textbox is no, the no button is selected.

so far the code i have is this,
if (query returns true)
{
VMradioButton.Checked = true;
TnRradioButton.Checked = false;
}
else{
VMradioButton.Checked = false;
TnRradioButton.Checked = true;
}

please, need help. thanks

Re: How do i select the radiobutton depending on the info on my textbox?

PIEBALDconsult12-Jul-09 17:00

PIEBALDconsult

12-Jul-09 17:00

A) Why? Why not just use the RadioButtons?

B) If the RadioButtons are in the same group, you only need to check one, the framework will uncheck the other(s) for you.

Otherwise, I'd use the TextChanged event of the TextBox and maybe a switch.

Re: How do i select the radiobutton depending on the info on my textbox?

daffy_200312-Jul-09 17:20

daffy_2003

12-Jul-09 17:20

thanks for the reply.
what is switch?
sorry, im a newbie.

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