Re: Saving an image of a control - C# Discussion Boards

mehrdadc4823-Sep-09 0:30

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

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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.

Read row value from previous DataRowView

kanchoette22-Sep-09 22:19

kanchoette

22-Sep-09 22:19

If I want to grab a DataRowView I use:

DataRowView arrangement = (DataRowView)BindingContext[debtorDataSet, "Debtor.FK_PaymentArrangements_Debtor"].Current;

How can I get a DataRowView for the previous position without changing the position to do so please?

Re: Read row value from previous DataRowView

N a v a n e e t h23-Sep-09 0:07

N a v a n e e t h

23-Sep-09 0:07

BindingContext[debtorDataSet, "Debtor.FK_PaymentArrangements_Debtor"].Position

will give the current position. Get the table from debtorDataSet and take the row at position - 1.

Navaneeth

How to use google | Ask smart questions

Adding the result of two Anonymous Type LINQ queries

Programm3r22-Sep-09 21:15

Programm3r

22-Sep-09 21:15

Hi all,

Is is possible to add the result of two anonymous LINQ queries together (when the data is gathered from two different data sources), to form a variable that one foreach loop can iterate on. For example:

var query1 = from x in dataCollection
             select new 
             {
                name = x.Name,
                surname = x.Surname
             };

var query2 = from x in xmlCollection
             select new 
             {
                name = x.Name,
                surname = x.Surname
             };

// ADD query1 and query2 ??
foreach (var result in .....

Many thanks in advance,
Kind regards,

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: Adding the result of two Anonymous Type LINQ queries

Ravi Mori22-Sep-09 21:56

Ravi Mori

22-Sep-09 21:56

Hi..You have to post this question in Linq Forum..

Anyway checkout this link :

http://blog.benhall.me.uk/2007/08/linq-to-sql-difference-between-concat.html[^]

Re: Adding the result of two Anonymous Type LINQ queries

Programm3r22-Sep-09 23:14

Programm3r

22-Sep-09 23:14

Ravi Mori wrote:
You have to post this question in Linq Forum..

Your right ... sorry about that Sigh | :sigh:

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

How to save a web page opened in Mozilla using c#

svt gdwl22-Sep-09 21:10

svt gdwl

22-Sep-09 21:10

If I open a web page (http://www.google.co.in/) on Mozilla firefox, How can I save to a specific Path (e.g., "C:\New Folder\WebPage.html")?

How to do this using c#

Re: How to save a web page opened in Mozilla using c#

Calla22-Sep-09 21:51

Calla

22-Sep-09 21:51

Check this link^
Might help you out..

how to know which control is focused

meghamaharshi22-Sep-09 21:03

meghamaharshi

22-Sep-09 21:03

hi,
i have many text boxes on my web page,
how can i get which text box is focused.

Thank You

Re: how to know which control is focused

OriginalGriff22-Sep-09 21:31

OriginalGriff

22-Sep-09 21:31

foreach (Control c in Controls)
   {
   if (c.Focused)
      {
      // Found it!
      MessageBox.Show(c.Text);
      }
   }

Remember to check if it is a TextBox, as buttons etc can also have the focus.

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Re: how to know which control is focused

meghamaharshi22-Sep-09 21:56

meghamaharshi

22-Sep-09 21:56

i am receiving error-
Cannot convert method group "Focus" to non delegate type 'bool'

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