Re: Flicker Free Drawing in C# - C# Discussion Boards

bidisha_tina11-Jan-06 0:06

11-Jan-06 0:06

I have a class myclass{public int a;} and a string str="a".
I want to set myclassobject.a=1 as myclassobject.str=1.How is it possible? }

bidisha

Re: object initialization

Colin Angus Mackay11-Jan-06 0:13

Colin Angus Mackay

11-Jan-06 0:13

Your class is:

class myclass
{
    public int a;
}

There is no definition of str in your class. You cannot set myclassobject.str = 1;

What is it you actually want to do? To what purpose do you want to set str=1 in a class that contains no definition of str?

Also, on a matter of coding guides, you should not make fields public like this. You should encapsulate them in a property.

ColinMackay.net
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

Re: object initialization

bidisha_tina11-Jan-06 0:29

bidisha_tina

11-Jan-06 0:29

Actually I have a xsd file from which I autogenerate a .cs file containing all class definations.I need to change my xsd often,so the members of the class often changes.And I want to initialise the members at run time whose name I can specify through a string str.suppose I set str="call".Now I want to set myobject.call=value.Please help.

bidisha

Re: object initialization

Colin Angus Mackay11-Jan-06 0:40

Colin Angus Mackay

11-Jan-06 0:40

Then you need to have a look at some of the stuff in the System.Reflection namespace. Start with typeof(MyClass) which returns a Type object and from there you can enumerate all sorts of things like the properties in a class, you can then invoke them in order to set the value of the property and so on.

ColinMackay.net
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

Re: object initialization

bidisha_tina11-Jan-06 0:51

bidisha_tina

11-Jan-06 0:51

I have used FieldInfo.setValue to set the fields where FieldInfo.Name=my_specified_name.
I have no problem with setting the field value with primitive datatype such as string or int.But some field are of user defined datatype.For example, I have a field as
Call mycall;
where
public class Call
{
string calltime;
string callvalue;
}
I cant reach to mycall.calltime using FieldInfo.

bidisha

EventHandling for Controls inserted(OLE way) in a RichTextBox

Linda Thomas10-Jan-06 23:36

Linda Thomas

10-Jan-06 23:36

I've inserted CheckBoxes to a RichTextBox using RichEditOLE's InsertObject() function. But when i try to check the CheckBox, it selects the CheckBox on the first Click and checking is done only on double clicking the CheckBox. Moreover it takes only MouseDown and Click Event. No other events are handled. Any ideas to solve this?

Linda Thomas

Flicker Free Drawing in C#

AB777110-Jan-06 23:11

AB7771

10-Jan-06 23:11

Hi all

can anyone tell me how to draw a line without flickering the screen

Thanks

Pramod

Re: Flicker Free Drawing in C#

[Marc]11-Jan-06 1:44

[Marc]

11-Jan-06 1:44

In your constructor (of the control that is drawn upon):

base.Setstyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint);

Did this from the top of my head, so maybe the enums are not spelled correctly, but it should point you in the right direction.

Also make sure you do the painting in OnPaint, not GreateGraphics.

HTH! Smile | :)

"..Commit yourself to quality from day one..it's better to do nothing at all than to do something badly.."
-- Mark McCormick

|| Fold With Us! || Pensieve || VG.Net ||

Re: Flicker Free Drawing in C#

AB777111-Jan-06 2:00

AB7771

11-Jan-06 2:00

Hi Marc,

Thanks for the suggestion
but i am using a RichtextBox and it does not has a
setStyle method

any other suggestions will be appreciated

Waiting for your quick reply.

Thanks
Pramod

Re: Flicker Free Drawing in C#

J4amieC11-Jan-06 2:29

J4amieC

11-Jan-06 2:29

RichTextBox does have a SetStyle method (it is inherited from Control), but it is protected so only accessible from a derived class.

As was suggested above, to get the functionality you require you must inherit from RichTextBox, set the relevant style flags in your constructor and do your painting in the overriden OnPaint method. Im pretty sure you are using Graphics g = Graphics.CreateGraphics(yourRTBInstance) to draw, which in this case is the wrong way.

-- modified at 8:29 Wednesday 11th January, 2006

Re: Flicker Free Drawing in C#

[Marc]11-Jan-06 16:55

[Marc]

11-Jan-06 16:55

Oh yeah it's protected, i had forgotten that D'Oh! | :doh:

"..Commit yourself to quality from day one..it's better to do nothing at all than to do something badly.."
-- Mark McCormick

|| Fold With Us! || Pensieve || VG.Net ||

Re: Flicker Free Drawing in C#

AB777111-Jan-06 17:23

AB7771

11-Jan-06 17:23

Hi,
can anyone of you send me the code please

Thanks

PRamod

Re: Flicker Free Drawing in C#

AB777111-Jan-06 17:24

AB7771

11-Jan-06 17:24

Hi,

CAn u send me the code

Thanks

Pramod

Re: Flicker Free Drawing in C#

AB777111-Jan-06 18:20

AB7771

11-Jan-06 18:20

Hi Marc,

i got it and now the drawing is done fine but still some flickering
is there.

This has also caused one more problem\, Due to this code
now if i type something in the Richtextbox it does not shows the text
instead white spaces are shown

any suggestions to avoid this

Thanks

Re: Flicker Free Drawing in C#

[Marc]11-Jan-06 22:24

[Marc]

11-Jan-06 22:24

I have no experience with RichTextBoxes, only owner-drawn controls, so i dont think i can help you that much. You can try fiddling with the SetStyle flags.

base.Setstyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint, true);

base.Setstyle(ControlStyles.DoubleBuffer, true);
or
base.Setstyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);
or
base.Setstyle(ControlStyles.DoubleBuffer | ControlStyles.UserPaint, true);

Sorry i can't help you any further...

"..Commit yourself to quality from day one..it's better to do nothing at all than to do something badly.."
-- Mark McCormick

|| Fold With Us! || Pensieve || VG.Net ||

Re: Flicker Free Drawing in C#

AB777111-Jan-06 23:50

AB7771

11-Jan-06 23:50

i tried all the options but none of them are working for me

Anyways Thanks for the suggestions Smile | :)

Pramod

Re: Flicker Free Drawing in C#

SwitcherSoft30-Mar-11 23:40

SwitcherSoft

30-Mar-11 23:40

Did you try this?

public class MyRichText : RichTextBox
   {
       public MyRichText()
       {
           //by setting Double Buffer, the painting will finish before its redenered
           SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
           SetStyle(ControlStyles.ResizeRedraw, true);
           SetStyle(ControlStyles.Selectable, true);

       }
   }

Jordan

Another fax question...

Petrus_Alex10-Jan-06 22:40

Petrus_Alex

10-Jan-06 22:40

I set the connection with fax modem using At commands:
(
at+fclass=1

atdt<tel number="">

at+fth=3

at+fts=8
at+ftm=96

at+fth=3

at+ftm=96
)
and after last command I need sending the page image data. Does anybody know how to send this data by writing to COMport? Which encoding I should use, in what format it should be wroten to COMport?

Thanks

SAns

Setup and deployment in visual studio.Net

deep710-Jan-06 22:02

deep7

10-Jan-06 22:02

Hi,
I had created setup files for the project which i worked on. So the user has to install the setup and run the application. The next time i give him the new setup of the same project, then he'll have to uninstall it from 'Control Pane->Add/Remove Programs'.
Is there a way by which he need not uninstall again and again i give him new setups, but just update it??
please can anyone just help me out here??

Re: Setup and deployment in visual studio.Net

mitooki11-Jan-06 0:55

mitooki

11-Jan-06 0:55

If you're using .Net 2.0, using ClickOnce makes updating applications easier.

http://msdn.microsoft.com/msdnmag/issues/04/05/ClickOnce/[^]

Re: Setup and deployment in visual studio.Net

mav.northwind11-Jan-06 6:33

mav.northwind

11-Jan-06 6:33

Hi!
There's a setting somewhere in the setup project to "check for newer version". You'll also have to increment the version of your project or windows installer will tell you that this particular version is installed already.

Regards,
mav

Format drive

oddstar10-Jan-06 21:59

oddstar

10-Jan-06 21:59

I am looking for a way to format a hard drive from an application written in c#. Does anyone know how this is done?

Andres

Re: Format drive

Corinna John10-Jan-06 22:28

Corinna John

10-Jan-06 22:28

You could use Process.Start() to excecute this command:
string formatCommand = "Command.com /C Format /Q /Autotest C:"

_________________________________
Please inform me about my English mistakes, as I'm still trying to learn your language!

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MicroCenter10-Jan-06 20:02

MicroCenter

10-Jan-06 20:02

[Message Deleted]

Re: SMART CLIENT DEPLOYMENT

mikailcetinkaya11-Jan-06 9:15

mikailcetinkaya

11-Jan-06 9:15

not sure but on options of project there is an option to app for being fully trusted or u can check out deployment pattern on http://www.msdn.com patterns&practices section...

Mikail Çetinkaya . The C# DEveloper

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