Redraw in a pictureBox - C# Discussion Boards

Identity Undisclosed22-Jul-07 2:19

22-Jul-07 2:19

Hello,

Thanks for the response.

Yes I know you were talking about embedding resources at build-time. That is why I asked for run-time.
The reason for this, if the user removes the images at the path or user wants to redistribute the screen saver. Then user would need to relocate the images as well. So in short I want everything in a single exe(scr) file.

Yes, resourcewriter creates a satellite dll. This has better results as compared to loading images at run-time.That is, the actions of user deleting the images does not affect the screen saver. However, relocating the screen saver on another machine would still require to move this dll as well.

Thanks.

"C makes it easy to shoot yourself in the foot. C++ makes it
harder, but when you do, it blows away your whole leg."
- Bjarne Stroustrup

Re: Creating Screen Saver in C#

Luc Pattyn22-Jul-07 2:31

Luc Pattyn

22-Jul-07 2:31

Identity Undisclosed wrote:
Yes I know you were talking about embedding resources at build-time. That is why I asked for run-time.
The reason for this, if the user removes the images at the path or user wants to redistribute the screen saver. Then user would need to relocate the images as well. So in short I want everything in a single exe(scr) file.

With embedded images, everything, I repeat everything, is in the single EXE file,
so you cant delete images, and you can copy the EXE anywhere you like, it will still show
the same set of images. That is the meaning of embedded resources.

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Gridview with 2 lines

dabuskol22-Jul-07 1:04

dabuskol

22-Jul-07 1:04

Hi,

Have you tried creating a gridview with 2 lines in one(1) record? I have 15 field that needs to fit the gridview which is my Detail info of my header/detail page. It display the entire fields but you have to scroll to the right in order for you to see the information.

Any work around?

Thanks

Dabsukol

Re: Gridview with 2 lines

Arun.Immanuel22-Jul-07 1:28

Arun.Immanuel

22-Jul-07 1:28

I would use Repeater control...

Regards,
Arun Kumar.A

Re: Gridview with 2 lines

dabuskol22-Jul-07 1:33

dabuskol

22-Jul-07 1:33

Sorry I forgot to tell you that the gridview that I am using should handle the edit/delete and can insert new row. all these is working already in my gridview though the display is my only problem. The design will not fit those users who is still using the 15inch monitor and our user doesn't want to accept scrolling to the right to see the other information.

Dabsukol

Re: Gridview with 2 lines

Arun.Immanuel22-Jul-07 2:21

Arun.Immanuel

22-Jul-07 2:21

No Idea of how to do this with GridView...

But I think DataList control will fulfill all your need...

Regards,
Arun Kumar.A

assembly: AssemblyKeyFile not supported in VS2005?

George_George22-Jul-07 0:50

George_George

22-Jul-07 0:50

Hello everyone,

When using property assembly: AssemblyKeyFile in Visual Studio 2005, I find that it is not supported and we need to using Project --> Properties --> Signing Tab to specify the sign key. Is that correct?

thanks in advance,
George

Redraw in a pictureBox

eskape1922-Jul-07 0:42

eskape19

22-Jul-07 0:42

I'm working on a Windows Forms project. It's an aplication on environment recognition. At some point I load an image in a

picuteBox and I have to determine, to "draw" the areas in that picture and then save them - I do this by extracting the x and

y mouse click coordinates and then by saving those pairs in a text file.

However, I do have a little problem...

When I minimize the window or when I put something on top of one of those regions, the part of the region that is covered

dissappears and then reappears with a delay (about 5-10 seconds) and only if I do somethig like a click or at least a mouse

movement, some kind of a refresh anyway.

Why is this happening? What am I doing wrong?
How can I repair this bug, or at least how can I shorten the delay?

I mention that the only suited event that I found for the invalidate action is the resize event! (I didn't find an event like

"object cover - object discover"...! that would have been better fit)

Here is the code for all this:

private void pictureBox1_Resize(object sender, EventArgs e)
{
Invalidate();
Update();
}

private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
if(zones != null)
drawZones(zones);
}

where the drawZones function is:

public void drawZones(Dictionary<string, list<string="">> zones)
{
foreach (KeyValuePair<string, list<string="">> vect in zones)
{
List<string> list = vect.Value as List<string>;
if (list == null)
throw new Exception("Mistake");
int i = 0;
foreach (string s in list)
{
Point pctP = convertStringToPoint(list[0]);
Point pctU = convertStringToPoint(list[list.Count - 1]);
Graphics gr = this.pictureBox1.CreateGraphics();
Pen pencil = new Pen(mLineColor, 1);
gr.DrawLine(pencil, pctP, pctU);
Point pctCurr = convertStringToPoint(s);
if (i != 0 && list.Count > 1)
{
Point pctBack = convertStringToPoint(list[list.IndexOf(s) - 1]);
gr.DrawLine(pencil, pctBack, pctCurr);
}
i++;
}
}
}

Good gives us the power of creating the future. Use this power with reason.

Re: Redraw in a pictureBox

Luc Pattyn22-Jul-07 1:33

Luc Pattyn

22-Jul-07 1:33

Hi,

I cant read all of your source, since it is losing its < and > signs to HTML interpretation.

Some ideas:
- the picturebox by itself will repaint the image it holds whenever needed; this
may be slow if the original image is very large (that's showing a huge file, in whatever
size the PB has).
- your paint handler allows you to draw on top of that image; it should
not throw exceptions (you have one), who is going to catch those ?
- your paint handler does not need to create a Graphics object, there is one available
in its PaintEventArgs. (and IF you create one, which takes time, you should also dispose it).

Hope this helps.

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Dynamic textcolor change in RichTextBox in visual C#

Blekk21-Jul-07 23:57

Blekk

21-Jul-07 23:57

Hi,

I am wanting to create an effect like that in FrontPage and DreamWeaver (and many other code IDEs).

For example, I am using DreamWeaver and I type this automatically turns blue to show it is code. This is what I would like to do.

I already have something going, but it only does it when the file is first loaded, not while it is being edited, so I need to put it in a loop or something like that, also another problem was that all subsequent text after the last string () was also blue.

Here are my two functions so far, CheckAllText() runs in the Load function of the Form.

public void TextColor(string text)
{
int iReturnValue = richTextBoxZedit.Find(text);
if (iReturnValue >= 0)
{
richTextBoxZedit.SelectionColor = Color.Blue;
}
}

public void CheckAllText()
{
string[] HTMLArray = new string[4] { "", "", "", "" };

for (int i = 0; i < HTMLArray.Length; i++)
{
TextColor(HTMLArray[i]);
}
}

Any suggestions?

Thanks in advance.

Re: Dynamic textcolor change in RichTextBox in visual C#

Luc Pattyn22-Jul-07 0:47

Luc Pattyn

22-Jul-07 0:47

Hi,

three comments:

- there are discussion threads about such things all the time, often they have the following
keywords: RichTextBox Syntax Coloring; and there are some article on it too on CP

= the more data and intelligence you add to RTB, it gets slower and slower

- IMO if you want to come up with a line-oriented editor with some fancy features and capable of
dealing with 1000+ lines of text, yiu should not use RTB, but just use a Panel, do all
the text handling and the painting yourself. That solution scales well, i.e. you can make it
deal with 1,000,000+ lines and still behave well. Example: I do most of the syntax coloring
analysis in the paint handler, and only for the lines that are visible (that's no more
than 100 on today's monitors).

If you expect to handle no more than say 300 lines of text, you're on a good track;
ptherwise you may have to rethink it.

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Re: Dynamic textcolor change in RichTextBox in visual C#

Blekk22-Jul-07 11:52

Blekk

22-Jul-07 11:52

Ok thanks, I am very early on in my learning of c# and so wouldn't really know how to go about painting the text myself etc.

Any tutorials?

Thanks.

Re: Dynamic textcolor change in RichTextBox in visual C#

Luc Pattyn22-Jul-07 12:38

Luc Pattyn

22-Jul-07 12:38

Hi,

since you are new to C#, I do not recommend you dive into GDI+ with all the painting stuff
immediately. I do recommend you read and work your way through an introductory book on C#
though (possibly skipping some of the chapters you dont immediately need, e.g. GDI+,
databases, networking).

If you dont need to handle very large files, then probably the RichTextBox approach is
best for you. It has its quirks, but you will learn from trying, and possibly asking here.

If on the other hand you do get curious, dont forget to search on CodeProject.
Searching "paint text" in the search box above, resulted in many articles, including this
lenghty book chapter.[^]

Enjoy C# !

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Re: Dynamic textcolor change in RichTextBox in visual C#

Blekk23-Jul-07 3:34

Blekk

23-Jul-07 3:34

Ok thanks, I'll have a look at that chapter later. I have already learnt lots on ado.net and database work in C# and so now want to move into something different.

When I said I was just beginning, I meant beginning GDI stuff, not C#. But thankyou for the links.

Re: Dynamic textcolor change in RichTextBox in visual C#

Luc Pattyn23-Jul-07 3:57

Luc Pattyn

23-Jul-07 3:57

You're welcome.

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Cannot Load ResXFileCodeGenerator and SettingsSingleFileGenerator

zoroyster21-Jul-07 23:49

zoroyster

21-Jul-07 23:49

Hi
I created a C# Application about 2 months ago. Haven't really touched done anything to it, other than moving the folder.

I re-opened it today and got these warnings..

Warning 1 The custom tool 'ResXFileCodeGenerator' failed while processing the file 'Properties\Resources.resx'.

Warning 2 The custom tool 'SettingsSingleFileGenerator' failed while processing the file 'Properties\Settings.settings'.

Warning 3 The custom tool 'SettingsSingleFileGenerator' failed while processing the file 'Properties\Settings.settings'.

They're just warnings, but unfortunately all the Forms and .cs files in my project cannot be opened, and i receive this error message "The project ______ does not exist in the current directory. It may have been moved, or deleted"

I have no idea why i got this message, I haven't really removed anything from the project folder. I always move the filed from my laptop-USB thumbdrive-pc, and it always works.

Can anyone help me out?

Thanks in advance.

Move the form without caption [modified]

Maddie from Dartford21-Jul-07 23:15

Maddie from Dartford

21-Jul-07 23:15

Hello,
In my C# form application i rounded the UI of form using drawing region. Now i am not having any caption bar, it suppressed the movable property of form.

I want the form to be mavable though the caption is not available.
How can i do it?

Thanks.

Gajesh

-- modified at 7:53 Sunday 22nd July, 2007

Re: Move the form without caption

mav.northwind22-Jul-07 5:09

mav.northwind

22-Jul-07 5:09

Hi!
You can make the window moveable by clicking anywhere inside the window's client area by overriding its WndProc like this:

protected override void WndProc(ref Message m)
{
	base.WndProc(ref m);

	const int WM_NCHITTEST = 0x0084;
	const int HTCAPTION = 0x0002;
	if (m.Msg == WM_NCHITTEST)
		m.Result = new IntPtr(HTCAPTION);// This tells windows to behave as if you clicked on the caption
}

Regards,
mav

--
Black holes are the places where God divided by 0...

Re: Move the form without caption

Maddie from Dartford22-Jul-07 17:54

Maddie from Dartford

22-Jul-07 17:54

Thanks Mav,
It works perfectly for Form client area.
One more concern here is that i have put one user control on the form so if user click on control area then also it should give the same apperance.
How can i catch the control's WndProc event in Form??

Thanks

Gajesh.

Re: Move the form without caption

mav.northwind22-Jul-07 19:11

mav.northwind

22-Jul-07 19:11

You can override the WndProc of the usercontrol, too.

There's no such thing as a "WndProc event", so you cannot simply "catch" messages destined for another window (at least not without using a windows hook, but that's far beyond the scope of a forum reply).

Regards,
mav

--
Black holes are the places where God divided by 0...

How to use Dictionary?

Nothend21-Jul-07 23:04

Nothend

21-Jul-07 23:04

Hi,all
I want to use Dictionary<> to make a map.I create a class named ILayer.So,I write
Dictionary<string, ilayer*=""> g_LyrNameToILayer =
new Dictionary<string, ilayer*="">();
But it was wrong,who can tell me what shoud i do? Thanks a lot!

Re: How to use Dictionary?

mav.northwind21-Jul-07 23:13

mav.northwind

21-Jul-07 23:13

The generic Dictionary<> class has to be parameterized with two types (one for the keys and one for the values).
Guessing from your variable name you must write something like this:

Dictionary<string, ILayer> g_LyrNameToILayer = new Dictionary<string, ILayer>();

Regards,
mav

--
Black holes are the places where God divided by 0...

Re: How to use Dictionary?

Nothend21-Jul-07 23:21

Nothend

21-Jul-07 23:21

Thanks,What you said is right,but,i want the Key is type of string,and the Value is type of pointer,It seems to be that pointer can't be a para in Dictionary.
so,how shoud i do?

Re: How to use Dictionary?

Larantz22-Jul-07 0:11

Larantz

22-Jul-07 0:11

What mav is saying should be sufficient if you're mapping up 'Name' with an instance of 'ILayer'.

Dictionary<string, ILayer> layerDict = new Dictionary<string, ILayer>();
List<ILayer> layers = GetLayers(); //some method of propagating layers.


int counter = 0;
foreach(ILayer layer in layers)
{
   layerDict.Add("Layer" + counter, layer);
   counter++;
}


...
//Retrieve a layer
ILayer layerOne = null;

if(layerDict.ConstainsKey("Layer1"))
{
   layerOne = layerDict["Layer1"];
}

//do something with the layer.

Best regards!

-Larantz-

for those about to code, we salute you
http://www.tellus-software.com

Re: How to use Dictionary?

Nothend22-Jul-07 0:21

Nothend

22-Jul-07 0:21

Thank u very much!

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