Re: Dynamic textcolor change in RichTextBox in visual C# - C# Discussion Boards

Dynamic textcolor change in RichTextBox in visual C#

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] }

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

Re: Dynamic textcolor change in RichTextBox in visual C#

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] }

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

Re: Dynamic textcolor change in RichTextBox in visual C#

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] }

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

Cannot Load ResXFileCodeGenerator and SettingsSingleFileGenerator

23-Jul-07 3:57

You're welcome.

Luc Pattyn

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

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

Re: Move the form without caption

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...

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

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

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!

mav.northwind21-Jul-07 23:13

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...

Nothend21-Jul-07 23:21

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?

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

Nothend22-Jul-07 0:21

22-Jul-07 0:21

Thank u very much!

Nothend22-Jul-07 0:24

Persistentn publish-subscribe in wcf

22-Jul-07 0:24

Thank you very much!

xshift21-Jul-07 22:10

xshift

21-Jul-07 22:10

I am trying to create a persistent pub-sub application using wcf.
When a client subscribes to the service it passes a URI and a mehtod name.
When the service needs to callback the client it connects to the URI using a known contract (which can be passed too in a more complex scenario) and activates the method.
My problem is how to listen to the URI on the CLIENT after subscribing.
I know how to do that using a ServiceHost but all I need is a listener for the contract the client exposes.

Is there a way of listening to an "ICallback" (not IReplyChannel or IInputChannel)?

Thanks,

xshift

Global Assembly Cache

George_George21-Jul-07 20:12

George_George

21-Jul-07 20:12

Hello everyone,

I have used gacutil tool to install my COM dll into Global Assembly Cache,

http://msdn2.microsoft.com/en-us/library/ex0ss12c(VS.80).aspx

But I am not sure whether I need to manually copy the actual assembly dll into some directory (like Windows\System32? Windows?) after running this tool? Or gacutil tool will automatically copy (install) the assembly for me -- so I only need to run gacutil -i <dllname>?

thanks in advance,
George

Re: Global Assembly Cache

mav.northwind21-Jul-07 21:24