C# Discussion Boards - CodeProject

Re: C#/.NET coding standards: private members

Christian Graus4-Sep-05 10:23

4-Sep-05 10:23

Interesting, I always use private over protected, but I've definately had to mark some methods as not CLS compliant in order to keep this approach. I wonder what was different ?

Christian Graus - Microsoft MVP - C++

Re: C#/.NET coding standards: private members

Mathew Hall2-Sep-05 1:07

Mathew Hall

2-Sep-05 1:07

I'd do the same as Christian (I loathe hungarian notation Dead | X|

)

"I think I speak on behalf of everyone here when I say huh?" - Buffy

-- modified at 7:07 Friday 2nd September, 2005

drag and drop scrolling

xilefxilef1-Sep-05 10:20

xilefxilef

1-Sep-05 10:20

Hi
I have a treeview where I implemented drag and drop functionality; however, if there are many nodes, when I start dragging a node and put the cursor on the bottom edge of the control, scrolling downwards works (I assume it's a built in treeview feature), scrolling upwards, on the other hand, doesn't. How do I implement scrolling up functionality for drag and drop? Confused | :confused:

Thank you in advance.

-- modified at 16:22 Thursday 1st September, 2005

Re: drag and drop scrolling

Judah Gabriel Himango1-Sep-05 10:27

Judah Gabriel Himango

1-Sep-05 10:27

You can use node.EnsureVisible() to make the control scroll some node into view. Using this, you should be able to achieve scrolling.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Cops & Robbers
Judah Himango

can this be done in C# / .NET / WinForms?

peterchen1-Sep-05 10:08

peterchen

1-Sep-05 10:08

I'm trying to bash my stubborn head through the .NET/ C# wall with a little project. before I start, I'd like to ask:

Can the following be done with reasonable effort:

- pretty heavy List Control custom draw
- Getting a DLL's version number
- Using WebForms for an app that can run both as Standalone Client and as a server-based application?

Pandoras Gift #44: Hope. The one that keeps you on suffering.
aber.. "Wie gesagt, der Scheiss is' Therapie"
boost your code || Fold With Us! || sighist | doxygen

Re: can this be done in C# / .NET / WinForms?

Judah Gabriel Himango1-Sep-05 10:17

Judah Gabriel Himango

1-Sep-05 10:17

peterchen wrote:
pretty heavy List Control custom draw

Yep, custom drawing is a common practice, and I don't see why you couldn't do your own list control. Keep in mind though, it's better to reuse existing control, overriding only the parts you need. Writing a control from scratch, though it seems fairly simple, is quite the large task in the end.

peterchen wrote:
- Getting a DLL's version number

Yeah, sure:

using System.Reflection;
...
// Get the assembly
Assembly executingAssembly = Assembly.GetExecutingAssembly();

// Get the assembly name (which includes version)
AssemblyName assemblyName = executingAssembly.GetName();

// Get the version of the assembly.
Version assemblyVersion = assemblyName.Version;

peterchen wrote:
- Using WebForms for an app that can run both as Standalone Client and as a server-based application?

I'm not sure why you'd want to do this. A WebForms app as a standalone executable and as a server app (are we talking console app?) This is probably unlikely, I don't think you'd want to do this. What you *could* do is create a web forms app, then build a simply Windows Forms app that contains the WebBrowser control from Microsoft. Navigate the browser control to your webforms aspx file, and voila, you have webforms running as a standalone client application. Again, I don't recommend this. Depending on what you're doing, there's likely a much easier way of accomplishing your goals, but you'd have to let us know what you're trying to do before I can help further.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Cops & Robbers
Judah Himango

Re: can this be done in C# / .NET / WinForms?

peterchen1-Sep-05 10:37

peterchen

1-Sep-05 10:37

Thanks

Judah Himango wrote:
Getting a DLL's version number

Does that work for "normal" Win32 binaries, too?

Judah Himango wrote:
I'm not sure why you'd want to do this

Just an idea (You see, I don't have a good overview of whast's suitable with the individual technologies). The app would be useful both as standalone, and across the LAN, and I wondered if I could feed both with the same code base. But I don't want to put significant extra work into it, and the LAN part is sufficient with push-publishing static HTML, too.

Pandoras Gift #44: Hope. The one that keeps you on suffering.
aber.. "Wie gesagt, der Scheiss is' Therapie"
boost your code || Fold With Us! || sighist | doxygen

Re: can this be done in C# / .NET / WinForms?

Judah Gabriel Himango1-Sep-05 10:55

Judah Gabriel Himango

1-Sep-05 10:55

peterchen wrote:
Does that work for "normal" Win32 binaries, too?

I believe the reflection stuff is for .NET CLR assemblies only. There's probably a way to find the version number of Win32 dlls as well, most likely as part of the System.Diagnostics process (for instance, you can get the version number of a dll using the System.Diagnostics.ProcessModule class).

peterchen wrote:
Just an idea

If you mean inter-computer communication within a LAN, I'd use either .NET remoting or web serivces. Remoting is quite a bit faster than web services, but less portable and is for .NET-to-.NET communication only.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Cops & Robbers
Judah Himango

Re: can this be done in C# / .NET / WinForms?

Mathew Hall2-Sep-05 1:15

Mathew Hall

2-Sep-05 1:15

There's probably a way to find the version number of Win32 dlls as well

You can PInvoke and use DllGetVersion

"I think I speak on behalf of everyone here when I say huh?" - Buffy

Re: can this be done in C# / .NET / WinForms?

hamster11-Sep-05 16:11

hamster1

1-Sep-05 16:11

There is actually a trick on using ASP.NET applications as standalone - you would need to write a small .exe which hosts the ASP.NET Runtime. I believe the article can be found in the MSDN Magazine (not 100% sure though...)

----------------------
~hamster1

Accesing a xml

BECK71-Sep-05 10:07

BECK7

1-Sep-05 10:07

Hi, I need help with this. I added a xml file into my project. Now, in one class i need to acces it so i can process the data in it. How can i do this? how can i get the path of it so i can access it?

Thank u so much, i would help me a lot...

Re: Accesing a xml

Stanciu Vlad1-Sep-05 10:21

Stanciu Vlad

1-Sep-05 10:21

In order to acces a file that is in the same path with the executable you can try the Application.StartupPath property.

I hope you understand...because is a rough world out there...

Re: Accesing a xml

BECK71-Sep-05 10:40

BECK7

1-Sep-05 10:40

is it a property of the project? or where can i find this property?

Re: Accesing a xml

Stanciu Vlad1-Sep-05 10:47

Stanciu Vlad

1-Sep-05 10:47

Put this into your code.
string pathToMyExe = System.Windows.Forms.Application.StartupPath;

I hope you understand...because is a rough world out there...

Re: Accesing a xml

BECK71-Sep-05 10:52

BECK7

1-Sep-05 10:52

im sorry, its a asp.net project

Re: Accesing a xml

Mohamad Al Husseiny1-Sep-05 11:30

Mohamad Al Husseiny

1-Sep-05 11:30

use Server.MapPath to get physical path
Server.MapPath("Direcory1\filename.xml");

MCAD

-- modified at 17:40 Thursday 1st September, 2005

Re: Accesing a xml

BECK72-Sep-05 7:01

BECK7

2-Sep-05 7:01

do i need to import something? using....?

Datagrid

surfman191-Sep-05 9:52

surfman19

1-Sep-05 9:52

hi, i have a datagrid with a size = 280; 216 and a PreferredColumnWidth = 120
i have 2 columns!
if i write some text in row nr 7 you can see a vertical scrollbar on the left side!
so i must set a smaller PreferredColumnWidth:

<br />
private void dataGrid1_CurrentCellChanged(object sender, System.EventArgs e)<br />
{<br />
	if(dataGrid1.CurrentRowIndex == 7) && some text ist entered....!?<br />
	{<br />
		dataGrid1.PreferredColumnWidth = 20;<br />
	}<br />
}<br />

but nothing change;-(

cu

Writing binary data to file

bouli1-Sep-05 9:51

bouli

1-Sep-05 9:51

Hello gurus,

I have a small problem of data inversion in file writing.

I wish to write the bytes of Int16 and Int32 in the same order as we read them.

Currently, when I write an Int32 for example lets say: 0xDEF40003
In the file we see: 03 00 F4 DE
I wish to write the same way as we read it: DE F4 00 03

How to do that?

Thanks for the help

Best regards.

There is no spoon.

Re: Writing binary data to file

Guffa1-Sep-05 10:05

Guffa

1-Sep-05 10:05

That is the Intel byte order. To get the result you want, you have to use Motorola byte order.

How do you write the int to the file?

---
b { font-weight: normal; }

Re: Writing binary data to file

bouli1-Sep-05 10:07

bouli

1-Sep-05 10:07

how did you guessed that it was for MC68K???

I do the following:
bw.Write(darkValues32[i]); while the content of darkValues32 is anInt32.

There is no spoon.

Re: Writing binary data to file

Guffa1-Sep-05 11:24

Guffa

1-Sep-05 11:24

That's wasn't a guess. Smile | :)

Extract the bytes from the value:

bw.Write((byte)((darkValues32[i] >> 24) & 255));<br />
bw.Write((byte)((darkValues32[i] >> 16) & 255));<br />
bw.Write((byte)((darkValues32[i] >> 8) & 255));<br />
bw.Write((byte)(darkValues32[i] & 255));

---
b { font-weight: normal; }

Re: Writing binary data to file

bouli2-Sep-05 5:38

bouli

2-Sep-05 5:38

Ok, it works like a charm Smile | :)

Thanks a lot Smile | :)

There is no spoon.

Re: Writing binary data to file

Stanciu Vlad1-Sep-05 10:09

Stanciu Vlad

1-Sep-05 10:09

This is a BigEndian LittleEndian problem Smile | :)

This means that your system writes a hexadecimal number in the right-left order or left-right...
I guarantee you that if your system writes the number in that order, when it will attempt to read the number, te result will be the correct one...

But, if you just want to format in that way your data into the file, the simplest way is to split the number into bytes, write them, spend some time, read the bytes back and build your numbers ... Smile | :)

I hope you understand...because is a rough world out there...

Re: Writing binary data to file

bouli1-Sep-05 10:12

bouli

1-Sep-05 10:12

And how to write an Int32 or Int16 in a Big Edian format?

There is no spoon.

-- modified at 16:25 Thursday 1st September, 2005

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