Re: Access Modifier - C# Discussion Boards

Re: Access Modifier

N a v a n e e t h23-Sep-09 1:02

N a v a n e e t h

23-Sep-09 1:02

hotthoughtguy wrote:
The private members are visible in main.

Private members of Grammar class?

Navaneeth

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Re: Access Modifier

hotthoughtguy23-Sep-09 1:12

hotthoughtguy

23-Sep-09 1:12

yes

Re: Access Modifier

N a v a n e e t h23-Sep-09 1:15

N a v a n e e t h

23-Sep-09 1:15

I tried your code and I can't see private members of that class from main.

Navaneeth

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Re: Access Modifier

nagendrathecoder23-Sep-09 1:17

nagendrathecoder

23-Sep-09 1:17

It shouldn't disply private members.

Re: Access Modifier

hotthoughtguy23-Sep-09 1:25

hotthoughtguy

23-Sep-09 1:25

amazingly i can see them from main Mad | :mad:

Re: Access Modifier

nagendrathecoder23-Sep-09 1:31

nagendrathecoder

23-Sep-09 1:31

Its really amazing Laugh | :laugh:

cause even i couldn't see private members.

Re: Access Modifier

Calla23-Sep-09 1:40

Calla

23-Sep-09 1:40

Weird.. I tried the code as well and I can't access any private members. For instance, the code

lst.a = null;

does not compile.

Can you show the code that allows access to these members?

Re: Access Modifier

harold aptroot23-Sep-09 1:42

harold aptroot

23-Sep-09 1:42

hotthoughtguy wrote:
The private members are visible in main.

Well they shouldn't be
I'd try restarting Visual Studio, maybe it glitched

Re: Access Modifier

benjymous23-Sep-09 1:59

benjymous

23-Sep-09 1:59

What do you mean by "visible" - do you mean you can access them in code, or that you can see them with intellisense / the debugger?

If it's the latter, then you're misunderstanding what private really means

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Re: Access Modifier

PIEBALDconsult23-Sep-09 5:53

PIEBALDconsult

23-Sep-09 5:53

Is Main a member of the Grammar class? If so, of course it can see the private fields.

Raise Event

mehrdadc4823-Sep-09 0:30

mehrdadc48

23-Sep-09 0:30

Hi,
In VB.Net in a class I can define an event as:
Public Event MyEvent

and raise it in a method as :
RaiseEvent MyEvent

and in another class that has an instance of first class I can catch the event.
How can I do this simple process in C#? We don't have RaiseEvent in C#.
Actually I want to notify another class when a method executes in the class.

Best wishes

Re: Raise Event

0x3c023-Sep-09 0:41

0x3c0

23-Sep-09 0:41

You look at the delegate as a method call. Don't forget if nothing's hooked up to it, it'll be null. So check for that.

if(this.MyEvent != null)
    this.MyEvent(MyArgs);

OSDev

Re: Raise Event

nagendrathecoder23-Sep-09 0:44

nagendrathecoder

23-Sep-09 0:44

see This

Hope it'll help. Smile | :)

Re: Raise Event

Giorgi Dalakishvili23-Sep-09 1:09

Giorgi Dalakishvili

23-Sep-09 1:09

Here you are: C# Event Implementation Fundamentals, Best Practices and Conventions[^]

Giorgi Dalakishvili

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My Articles

Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

My blog
#endregion

Saving an image of a control

Harvey Saayman23-Sep-09 0:20

Harvey Saayman

23-Sep-09 0:20

Hey guys

How would I go about saving an image of a control? Lets say for instance I'm drawing something on a panel using GDI+, I need to save that drawing to JPEG. Been googling around but no joy.

Any help will be appreciated

Thanks

Harvey Saayman - South Africa
Software Developer
.Net, C#, SQL
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Re: Saving an image of a control

N a v a n e e t h23-Sep-09 0:26

N a v a n e e t h

23-Sep-09 0:26

Are you looking for DrawToBitmap[^] method?

Navaneeth

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Re: Saving an image of a control

Luc Pattyn23-Sep-09 0:27

Luc Pattyn

23-Sep-09 0:27

Control.DrawToBitmap is the general answer, some Controls (such as RTB) need a bit more effort though.

Smile | :)

Luc Pattyn

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Re: Saving an image of a control

Hristo-Bojilov23-Sep-09 0:51

Hristo-Bojilov

23-Sep-09 0:51

DrawToBitmap doesn't works for ActiveX controls like WebBrowser.
You would better use Graphics.CopyFromScreen but It works for active window only.

Life is a stage and we are all actors!

Re: Saving an image of a control

PIEBALDconsult23-Sep-09 6:10

PIEBALDconsult

23-Sep-09 6:10

What I do in my screen grabber applet is...

Define a bitmap of the appropriate size:

System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap
(
    this.pPanel.Width
,
    this.pPanel.Height
) ;

Get a Graphics object for the bitmap:

using ( System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage ( bitmap ) )

Copy the area of the screen that the Panel covers to the bitmap:

gr.CopyFromScreen
(
    this.pPanel.PointToScreen ( new System.Drawing.Point ( 0 , 0 ) )
,
    new System.Drawing.Point ( 0 , 0 )
,
    this.pPanel.Size
) ;

Save the bitmap to a file (I prefer PNG):

bitmap.Save ( sw.BaseStream , System.Drawing.Imaging.ImageFormat.Png ) ;

(Details left as an exercise.)

Event timer_Tick in thread

tamir10123-Sep-09 0:15

tamir101

23-Sep-09 0:15

Hello,

I've a timer that run every 1 second (and do some check),
how can i insert it to a thread? because it interrupt to my application.

can someone please help me here?

Re: Event timer_Tick in thread

N a v a n e e t h23-Sep-09 0:25

N a v a n e e t h

23-Sep-09 0:25

tamir101 wrote:
I've a timer that run every 1 second (and do some check),

Is that a System.Windows.Forms.Timer or System.Threading.Timer? First one runs on the main thread and second one runs on a pooled thread.

If you are using Forms.Timer, consider changing to Threading.Timer. This[^] MSDN article will help.

Navaneeth

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Re: Event timer_Tick in thread

tamir10123-Sep-09 1:50

tamir101

23-Sep-09 1:50

Hi,

Can you please explain me how to use it?
I can't understand how i need to do it...

Picturebox Image to be stored in Sql Database

amaankhan23-Sep-09 0:03

amaankhan

23-Sep-09 0:03

i want to stored the image which i have in a picturebox to be stored in sqldatabase. and which datatype i should use in sql

Re: Picturebox Image to be stored in Sql Database

N a v a n e e t h23-Sep-09 0:08

N a v a n e e t h

23-Sep-09 0:08

VARBINARY(MAX)

Navaneeth

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Re: Picturebox Image to be stored in Sql Database

carlecomm23-Sep-09 16:36

carlecomm

23-Sep-09 16:36

You can place your own contol in the dropdownlist of a combobox, see here:

http://www.codeproject.com/KB/combobox/CustomComboBox.aspx

modified 27-May-14 5:28am.

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