C# Discussion Boards - CodeProject

14-May-04 8:29

Setting TextBox.Location will move the textbox to the new position, no calls to refresh required; the form will refresh itself automatically.

#include "witty_sig.h"

I\O ports

Member 87345214-May-04 7:10

Member 873452

14-May-04 7:10

hi all
can anybody tell me about functions in c# like _inp & _outp in VC++

or can u tell me how can I access 378,379,37A (parallel port) using API functions or C#

thanks for all

Re: I\O ports

Judah Gabriel Himango14-May-04 7:16

14-May-04 7:16

There are several articles on CP and many posts regarding port access. I suggest you do a search.

Here are 2 articles that may be of help to you

Using parallel ports in C#[^]
Using parallel ports part II[^]

#include "witty_sig.h"

Re: I\O ports

eggie514-May-04 20:30

eggie5

14-May-04 20:30

just search NTPort in google.

/\ |_ E X E GG

myNameIsRon14-May-04 6:02

myNameIsRon

14-May-04 6:02

Hi,
I've noticed that when you load a second Form (set to TopMost=true), that the cursor does not activate (show up) in the textbox set to TabIndex=0. Click back to the first Form and then back to the second Form, the cursor shows blinking away. Any ideas on how to fix this?

thanks,
Ron

Heath Stewart14-May-04 6:27

14-May-04 6:27

Are you using Show or ShowDialog? In the former case, also try calling Activate on your form after calling Show.

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myNameIsRon15-May-04 11:25

myNameIsRon

15-May-04 11:25

Thanks Heath!
I'm using a Show (it's a Find/Replace Form for a notepad like application)...
I'll have to give that a try (I'm at work now).

One way I was able to correct this was to call the TopMost just after the Show call and not set in the Find/Replace Form.

One other question... when you have a TopMost Form and you want to click onto the original Form (back to editing the richtextbox but keeping the Find/Replace Form open) how do make it so ONE click activates the original Form and places the cursor where you clicked?

Ron

Heath Stewart16-May-04 11:25

Embed C# code within VB application

16-May-04 11:25

One click will activate the form. To set the cursor, override OnActivate, get the current mouse coordinates (in screen coordinates) using the static Control.MousePosition property, convert those coordinates to client coordinates by calling PointToClient on the Control and then set the insertion point in whatever way the control supports.

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Excel Paste Special

Russell Jones14-May-04 5:36

Russell Jones

14-May-04 5:36

I can't get this to work at all.

If i use vba i use:

myRange.copy
myRange.PasteSpecial Paste:=xlPasteFormulas, Operation:=xlNone, _
SkipBlanks:=False, Transpose:=False

what i'm trying to do is paste the data back to where they originally came from. In c# though, there is no overload for copy that doesn't take arguments.

has anyone done copy and pastespecial before, or know another way of getting c# to convert a range from references / formulas to values. The code will be called up to 5000 times per run of the application, so while it doesn't need to be lightning fast, it needs to be quicker than looping throught the cells and setting their values individually.

Thanks

Russ

Re: Excel Paste Special

Russell Jones14-May-04 5:50

Russell Jones

14-May-04 5:50

i've solved this one, the copy method is more than happy with a param: Type.Missing

Variants make c# a pain for this office lark.

Jack Knife14-May-04 5:23

Jack Knife

14-May-04 5:23

I have been tasked with updating a VB.NET application which was written by a developer who is no longer with our company. I would prefer to slowly convert the VB app to C# over time, but simply do not have the bandwidth to do the whole thing right now.

I would like all the updates added to the application to be made in C#. Is it possible, since both languages are compiled to IL, to embed C# code within a VB application, and how might one go about doing such a thing?

Re: Embed C# code within VB application

Judah Gabriel Himango14-May-04 5:42

Re: Embed C# code within VB application

14-May-04 5:42

It's not possible to embed C# within VB.NET source, sadly. You could, however, add any new functionality to a seperate dll. Your VB.NET code can easily call your C# code and vice-versa.

FYI, there's lots of programs out there, including some free ones, that automatically convert C# to VB and vice-versa. I suggest doing a google search if you're interested in that.

#include "witty_sig.h"

Heath Stewart14-May-04 5:55

Re: Saving data in ListView

14-May-04 5:55

As Judah said, you could can easily communicate with both because they do compile to IL (this is the fundamental principal of the CLI). A single compiler can't handle both, though.

If you want to maintain a single DLL with this, however, there is a way (though VS.NET 2002 and 2003 won't be any help). You can compile either the VB.NET or C# source to a module using the command-line compiler and passing the switch /t:module. When you compile the other language source, you can embed this module into your assembly using /addmodule:filename on the command line, along with the rest of the params (like /t:dll). Your assembly now contains two modules that define the IL. Consumers of your assembly won't know the difference (unless they used a disassembler, but that really doesn't matter).

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Saving data in ListView

mikeyb2514-May-04 5:20

mikeyb25

14-May-04 5:20

How do I save the data in a list view to disk? I have read books and searched the internet. A code sample would be great because I am a begginer. Actually any help would be appreciated.

Judah Gabriel Himango14-May-04 5:50

Help files .NET applications

14-May-04 5:50

Writing to disk is as simple as opening a stream and feeding it bytes. There are special streams available that let you feed in text too. Here's some example code that writes the text of the items of a ListView to a text file on disk:

using System.IO;
...
StreamWriter writer = File.CreateText("c:\\test.txt");
foreach(ListViewItem item in listView1.Items)
{
	writer.WriteLine(item.Text);
}
writer.Flush();
writer.Close();

#include "witty_sig.h"

Sudhakar Pasupunuri14-May-04 4:57

Sudhakar Pasupunuri

14-May-04 4:57

What kind of help files does .NET support?? I am converting my application from java to C#.. In the older case i have a .hlp file for providing help..But i found C# doesnt support .hlp file..so i decided to convert this to .chm file.. So before i do this i want to know whether C# really doesnt support .hlp files or not??? I have tried MSDN and couldnt get any info saying it doesnt support .hlp..instead i found many articles on .chm..

Thanks in advance

Sudhakar

Heath Stewart14-May-04 5:51

14-May-04 5:51

It supports CHM, but you can use whatever help you want if you provide the implementation by handling the HelpRequested event (or overriding OnHelpRequested in derivative controls).

IMO, CHMs are much better anyway. It's a better interface, easier to write for (you can use any HTML too and the HTML Help Workshop, where writing .hlp files is bit more of a pain).

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Sudhakar Pasupunuri17-May-04 2:20

Sudhakar Pasupunuri

17-May-04 2:20

Thanks Stewart..

I already had the code for the above events.. but i have the problem with the following..

--------
I have my old application in java(Microsoft VJ++) and this application uses winhelp file(.hlp) to provide help for the application. This application has a form and a help control on that..when i clicked it , it displays the help related to the form..Internally the code looks like this..

Help help = new Help();
help.showHelp(string helpfilename.hlp, string topic id);
Ex; helpfilename looks like "x.hlp"
Topic id as "906"

---

I have converted the above application to .NET framework..I am using C# as the language..
So i want to know the equivalent function for the above.. I tried using the following code as a replacement for the above.

HelpNavigator navigator = HelpNavigator.Topic;
System.Windows.Forms.Help.ShowHelp(this, "helpfilename.hlp", navigator, "topic id");

So i used this code:
HelpNavigator navigator = HelpNavigator.Topic;
System.Windows.Forms.Help.ShowHelp(this, "x.hlp", navigator, "906");

But the above code is not poping up anything..

Can anyone plz help me..

Thanks
Sudhakar

Heath Stewart17-May-04 3:31

17-May-04 3:31

As I mentioned before, the help classes in .NET only work with HTML Help 1.x files (.chm). If you want to open a WinHelp file (.hlp), you should P/Invoke the WinHelp[^]:

[DllImport("user32.dll", CharSet=CharSet.Auto)]
private static extern bool WinHelp(
  IntPtr hWndMain, // Handle to main form: use form's Handle property
  string lpszHelp, // .hlp filename
  [MarshalAs(UnmanagedType.SysUInt)] IntPtr uCommand, // HELP enum constants
  [MarshalAs(UnmanagedType.SysUInt)] IntPtr dwData); // User-defined data

The last two params are processor-dependent types, which is why they are defined each as an IntPtr. To pass these values correctly, you'd use whatever int or long (doesn't really matter) and pass them to the constructor for the IntPtr like so:

IntPtr param1 = new IntPtr(/* some value */ 1);

This doesn't make a pointer to one - just wraps the value 1 in a processor-dependent integer. This is for portability on 32- and 64-bit processors (something a lot of examples fail to take into account).

You can find the enum constants (and what to pass into dwData depending on the constant used for uCommand) in the documentation for the WinHelp function at http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/reference/functions/winhelp.asp[^]. These constants are defined in WinUser.h in the Platform SDK (installed by default with VS.NET).

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