Treading and Paint - C# / C Sharp

Jim Lewis

I have a simple worker thread that does "BeginInvoke(UpdateUI)". In
UpdateUI I have "panel.Refresh ()" which the debugger shows is
executed. Yet a breakpoint in the panel's Paint handler never gets
called. And the panel is never painted. Can someone clue me in why
Refresh does not cause a Paint?

May 15 '07 #1

Subscribe Post Reply

1888

Nicholas Paldino [.NET/C# MVP]

Jim,

You say "paint handler". Are you overriding the OnPaint method, or
attaching to the Paint event?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Jim Lewis" <ji******@emachineshop.comwrote in message
news:11*********************@e51g2000hsg.googlegro ups.com...

>I have a simple worker thread that does "BeginInvoke(UpdateUI)". In
UpdateUI I have "panel.Refresh ()" which the debugger shows is
executed. Yet a breakpoint in the panel's Paint handler never gets
called. And the panel is never painted. Can someone clue me in why
Refresh does not cause a Paint?

May 15 '07 #2

Bob Powell [MVP]

Perhaps you could try InvokePaint from your worker thread too.

--
--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

Find great Windows Forms articles in Windows Forms Tips and Tricks
http://www.bobpowell.net/tipstricks.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/faqmain.htm

All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.
"Jim Lewis" <ji******@emachineshop.comwrote in message
news:11*********************@e51g2000hsg.googlegro ups.com...

>I have a simple worker thread that does "BeginInvoke(UpdateUI)". In
UpdateUI I have "panel.Refresh ()" which the debugger shows is
executed. Yet a breakpoint in the panel's Paint handler never gets
called. And the panel is never painted. Can someone clue me in why
Refresh does not cause a Paint?

May 19 '07 #3

Similar topics

Paint on lostfocus

by: Tamir Khason | last post by:

Why when I lost focus (go to back) on form all GDI+ paints disappears..... BUG or I do something wrong???? TNX

C# / C Sharp

Paint event problem

by: Rene | last post by:

Currently, the paint even will only acknowledge painting going on inside of the ClipRectangle, any of the drawing that is outside of the ClipRectangle is ignored. How can I get the paint...

C# / C Sharp

Control.Paint gone missing

by: vooose | last post by:

Consider a UserControl TopCont that contains two other UserControls, CompA and CompB. Somewhere in the constructor of TopCont we have CompA.Paint += new PaintEventHandler(compA_Paint);...

C# / C Sharp

Control.Paint and onPaint( ) events gone missing

by: vooose | last post by:

Consider a UserControl to which you do userControl.Paint += new PaintEventHandler(paint_method) If you don't like that way, and prefer to override onPaint( ) then the problem stated below...

C# / C Sharp

Overload resolution failed because no 'Paint' is accessible.

by: Mike Cooper | last post by:

I have been staring at the above error for over a week now! I have a an inherited data class looking like thus: Public Class DataGridBoolColumnInherit Inherits...

Visual Basic .NET

label control text rotation (paint) revisited.

by: jcrouse | last post by:

I am rotating some text is some label controls. In the one place I use it it works fine. In the other place I use it I can't figure out the syntax. I don't really understand the event. Where it...

Visual Basic .NET

A paint event question

by: hamil | last post by:

The following code will display a tif file on a form. When another form is moved over the tif image, the tif image is erased where the form was moved. A paint event occurs when this happens. My...

Visual Basic .NET

adding a Paint event to a interface

by: Rotsey | last post by:

Hi, I have a interface that I use for a form so I can pass the form to another object. How do I add the Paint event to the interface and subsequently handle the paint event in my other...

C# / C Sharp

Paint message fire galore

by: =?Utf-8?B?SmVzcGVyLCBEZW5tYXJr?= | last post by:

Hi, On a usercontrol I've put a set of radiobuttons within a groupbox. These radiobuttons have visual style enables, i.e. they turn orange when hovering over them and green when pushed. ...

C# / C Sharp

How to turn on java script in a villaon keypad mobile phone

by: Charles Arthur | last post by:

How do i turn on java script on a villaon, callus and itel keypad mobile phone

Java

Migrating Website to Cloud - Emmanuel Katto

by: emmanuelkatto | last post by:

Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel

General

Looking to do Android software development, any suggestions? Is flutter better?

by: nemocccc | last post by:

hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?

General

How to build RAID in BIOS?

by: Hystou | last post by:

There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...

Computer Hardware

Changing the language in Windows 10

by: Hystou | last post by:

Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...

Windows Server

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...

C / C++

Discussion: How does Zigbee compare with other wireless protocols in smart home applications?

by: tracyyun | last post by:

Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...

General

AI Job Threat for Devs

by: agi2029 | last post by:

Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...

Career Advice

Access Europe - Using VBA to create a class based on a table - Wed 1 May

by: isladogs | last post by:

The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...

Microsoft Access / VBA