C# Discussion Boards - CodeProject

Re: Changing the sort behavior of a combo box

Dan Neely31-Oct-05 9:31

Dan Neely

31-Oct-05 9:31

I suppose that would work, but it seems like alot of hoops to be jumping through.

Re: Changing the sort behavior of a combo box

.NetRocker31-Oct-05 9:35

.NetRocker

31-Oct-05 9:35

how are you adding the items to the combo box?

Re: Changing the sort behavior of a combo box

Dan Neely31-Oct-05 10:56

Dan Neely

31-Oct-05 10:56

Iterating an internal datastructure (hash table of wrapped classes generated by the xsd tool), and if the neccesary conditions are met, calling combobox.Items.Add(filename).

Re: Changing the sort behavior of a combo box

Carl Mercier31-Oct-05 10:22

Carl Mercier

31-Oct-05 10:22

It's the only (and best) way to do it.

Carl Mercier
Geek entrepreneurs, visit my blog! [^]

Please,Please,Please...

KORCARI31-Oct-05 8:19

KORCARI

31-Oct-05 8:19

Hi guys.Im in desperate need for help.Need some help to find any code for building Control System plots in C#.I mean build such plots as Bode,Nyquist etc.Its very simple to plot them in MAtlab But I have to plot them in C#.Anybody can help me ? Thank you

Re: Please,Please,Please...

Christian Graus31-Oct-05 11:18

Christian Graus

31-Oct-05 11:18

I don't know exactly what you want to draw, but you need to draw them yourself. Have you looked into the Graphics namespace ? Basically a Graphics object contains a Bitmap and has methods for drawing on it.

Christian Graus - Microsoft MVP - C++

how to compile without running (debug) the application?

Sasuko31-Oct-05 7:01

Sasuko

31-Oct-05 7:01

how can start the compile process without make run the application?

Re: how to compile without running (debug) the application?

Wjousts31-Oct-05 7:29

Wjousts

31-Oct-05 7:29

Build solution

Re: how to compile without running (debug) the application?

MalikRizwan31-Oct-05 20:17

MalikRizwan

31-Oct-05 20:17

Ctrl + Shift + B

or Alt + B then release both keys and press E

R A M

Colored ListBox scrollbar

gnjunge31-Oct-05 6:50

gnjunge

31-Oct-05 6:50

Hi,

I'm quite new in the advanced GUI features of .NET . Can anybody tell me how to change the (back/fore)color of a scrollbar in a listbox? Did some research on the net but didn't really find a good answer.

Thanks
Gideon

Re: Colored ListBox scrollbar

.NetRocker31-Oct-05 8:43

.NetRocker

31-Oct-05 8:43

Is this for a web based application or a windows applciation? In web based, we can use CSS style sheets to change the style of the scroll bar. In windows application, we do not have any direct means of changing the style of scrollbar. You could write a customized scroll bar that is inherited from windows scrollbar class.
Here is link for it in windows http://www.codeproject.com/vb/net/corescrollbar.asp[^]

Re: Colored ListBox scrollbar

gnjunge31-Oct-05 10:36

gnjunge

31-Oct-05 10:36

Yes it is for a windows app. I saw the article before, but wasn't sure if there was a better/easier way to do it.
I know how to hide the vertical scrollbar, but how do I make the listbox scroll up or down programmatically?

Thanks,
Gideon

Re: Colored ListBox scrollbar

.NetRocker31-Oct-05 11:00

.NetRocker

31-Oct-05 11:00

You can do this. Its a kinda hack but it works. Set the selected index to the item till where you would like to scroll down. Then set it back to -1.
Through this you could control the scroll too. I have tried it and it works.

Re: Colored ListBox scrollbar

gnjunge31-Oct-05 11:20

gnjunge

31-Oct-05 11:20

Thanks, I will give it a try tomorrow.

Gideon

PrintPreviewControl without installed printers

Luis Alonso Ramos31-Oct-05 5:17

Luis Alonso Ramos

31-Oct-05 5:17

Hello,

In my application I'm using the PrintPreviewControl to let the user see the reports without having to print them. But if the system doesn't have any installed printers, an exception is thrown.

Is there any way to make the control work without having a printer? I would think that if I could just provide the paper size, the control could do its rendering correctly.

Also, I would like to change (or remove) the status dialog displayed when generating the preview. But I think it's hardwired into the control Frown | :(

Any suggestions?

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

The amount of sleep the average person needs is five more minutes. -- Vikram A Punathambekar, Aug. 11, 2005

Re: PrintPreviewControl without installed printers

Dan Neely31-Oct-05 5:51

Dan Neely

31-Oct-05 5:51

Not sure how to get it, but on printerless systems I've seen 'xyz file' listed as the default printer in some apps.

Re: PrintPreviewControl without installed printers

Luis Alonso Ramos31-Oct-05 6:24

Luis Alonso Ramos

31-Oct-05 6:24

Printing to a file... could work! Let me check on it.

Thanks for the pointer! Smile | :)

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

The amount of sleep the average person needs is five more minutes. -- Vikram A Punathambekar, Aug. 11, 2005

c#.net excel add-in problem

mack scynox31-Oct-05 3:57

mack scynox

31-Oct-05 3:57

hi,

I have developed an add-in for excel applications and successfully loaded/run in developed computer. But in other machines with different OS (XP , 2000 , 2003...) and Excel (2000,XP,2003...) versions i had problems.

I created a setup and tested in those systems. My problem is that :

The add-in dll is not loaded in Excel 2000. Works well in other newer versions (2003 and XP, also caused problems but solved them) but the toolbar and button is not shown in the excel.

I have tried everything about registry (LoadBehavior=3 , DLL CLSID's) and also Excel options such as "Disabled Items" and "Macro Security" etc... Those techniques worked on newer versions of Excel but I need to load my add-in in Excel 2000 too.

Do i miss something? I do not think i have a mistake on it because on newer versions works well.

I appreciate any help...

Thanx.

a.k. Mack Scynox...

Re: c#.net excel add-in problem

Dan Neely31-Oct-05 4:36

Dan Neely

31-Oct-05 4:36

MS changes the details of it's office interop between versions at a whim. Some of the changes are niether forward or backwards compatable. You might have to fork your sourcebase to support multiple versions.

Unloading an Assembly loaded via reflection.

Tristan Rhodes31-Oct-05 3:45

Tristan Rhodes

31-Oct-05 3:45

I've loaded an assembly by reflection, and now wish to re-combile the resource it represents, before continuing my testing of it.

The problem i have is, once i load an assembly, it remains in use until i exit my application. I've closed all refferences to this assembly, and all types used by it have been disposed and garbage collected.

How would i go about unloading the assmebly completely from my application?

Cheers

Tris

Re: Unloading an Assembly loaded via reflection.

Febret31-Oct-05 4:43

Febret

31-Oct-05 4:43

Unloading of single assemblies is not possible. You can unload only at the AppDomain level, so a solution in your case could be loading your assembly in a separate appdomain and then unload it when it is no longer used.

For a better explanation on the reasons why you cannot unload single assemblies and alternative ways of doing it i suggest you
this

Bye!

Problems with XPath...

Carl Mercier31-Oct-05 3:22

Carl Mercier

31-Oct-05 3:22

Hi!

I'm trying to retrieve a value from a XML using XPath. However, I get this exception:

Namespace Manager or XsltContext needed. This query has a prefix, variable, or user-defined function.

My code is as following:

XPath Query: /rdf:RDF/geo:Point/geo:lat/text()

C# Code:

		public static string GetValue(XPathDocument doc, string query) <br />
		{<br />
			XPathNavigator nav = doc.CreateNavigator();	<br />
			XPathNodeIterator iter = nav.Select(query);<br />
<br />
			if (iter.MoveNext()) <br />
				return iter.Current.Value;<br />
			else<br />
				return null;<br />
		}

XML:

<rdf:RDF xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<geo:Point>
<geo:long>-0.15</geo:long>
<geo:lat>50.8333333</geo:lat>
</geo:Point>
</rdf:RDF>

Anyone has an idea of what's going on? It must be pretty simple but I couldn't find much on Google.

Thanks!

Re: Problems with XPath...

leppie31-Oct-05 6:10

leppie

31-Oct-05 6:10

You need to pass an instance of the XmlNamespaceManager to the function so that namespace prefixes can be resolved.

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Displaying italicized text on a dialog

Dan Neely31-Oct-05 3:22

Dan Neely

31-Oct-05 3:22

How can I do this? I assume italicizing one word in the middle of a sentence is beyond the capabilities of a label object, but haven't been able to find a way to do it using a (crippled) richtextbox either.

Re: Displaying italicized text on a dialog

Febret31-Oct-05 4:57

Febret

31-Oct-05 4:57

First use the SelectionStart and SelectionLength properties of the control to select the part of the text you want to italicise, the go with this:

[RichTextBox].SelectionFont =
 new System.Drawing.Font(
  [RichTextBox].SelectionFont, 
  FontStyle.Italic);

Hope it helps.

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