C# Discussion Boards - CodeProject

Calling external apps from c#

7-Dec-01 5:22

Does anyone know how to run an external application from a c# windows application? Confused | :confused:

Re: Calling external apps from c#

Erik Thompson7-Dec-01 12:27

Erik Thompson

7-Dec-01 12:27

This puzzled me for a while too. I searched high and low in the .NET Framework SDK and figured you just couldn't do it. Then by chance I ran across it when going individually through each assembly.

It's in a really obvious location. (read with a sarcastic attitude)

System.Diagnostics.Process.Start("notepad.exe");

Cheers,
-Erik
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
My thoughts are my own and reflect on no other.

Connecting to proxy server using socks4 or 5?

fadi7-Dec-01 4:50

fadi

7-Dec-01 4:50

Hello All,

Anyone knows how to connect to proxy servers? there is a method for web requests, but not for the plain socket component. I have seen samples in C++, but none yet in C#

fadi

Dockable window

Hoang30-Nov-01 17:05

Hoang

30-Nov-01 17:05

How can I make dockable windows like tool windows in Visual Studio with C# ?

Re: Dockable window

Neill Jordan6-Dec-01 6:32

Neill Jordan

6-Dec-01 6:32

I've been trying to figure that out myself. I found this article

http://codeproject.com/csharp/dockingcontrol.asp

which demonstrates a docking control, not a standalone window though.

Re: Dockable window

fadi7-Dec-01 4:35

fadi

7-Dec-01 4:35

www.icsharpcode.net has released the code for their C# editor which has that functionality. It is however built around te .Net SDK and even though they ported a version to VS.Net, it is still in same coding style as that of the SDK (no visual forms all code)
It does implement the same docking and tabs look and feel as that of .Net... hopefully someone can extract that functionality and make a standalone sample out of it. It is too advanced for me right now.

fadi

grid control

Neill Jordan30-Nov-01 12:40

Neill Jordan

30-Nov-01 12:40

Can someone point me to some code for a C# grid control? Is it possible to use the datagrid for displaying an editable grid which is not loaded from a database?

Why hasn't Microsoft included a grid control in VS.NET?

Re: grid control

30-Nov-01 13:31

C# ?
Why are you using that? It only encourages Microsoft.

(I don't want to live in a Microsoft world - so only use their stuff when you HAVE to - otherwise it reinforces their monopolies.)

Re: grid control

jkgh3-Dec-01 5:17

jkgh

3-Dec-01 5:17

I thought that there was a c# grid control on here, perhaps a false memory.

sprintf()

Rick Crone29-Nov-01 7:26

Rick Crone

29-Nov-01 7:26

Is there something in C# (maybe working with a 'string' variable) that allows formating like we use in C++ with the sprintf() function or the CString class's member function Format()?

Rick Crone

Re: sprintf()

Nish Nishant29-Nov-01 16:25

Nish Nishant

29-Nov-01 16:25

Use String.Concat

using System;
class nish
{
	public static void Main()
	{
		string s;
		int a=10;
		int b=17;
		s=String.Concat(a,"   ",b);
		Console.WriteLine(s);
	}
}

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

Re: sprintf()

Eric Gunnerson (msft)3-Dec-01 8:36

Eric Gunnerson (msft)

3-Dec-01 8:36

Try String.Format()

Visual Studio .NET forgets WindowState of base-class Form

Mike Morearty25-Nov-01 8:45

Mike Morearty

25-Nov-01 8:45

VS.NET bug: In Visual Studio, if you have one Form which has its WindowState property set to "Maximized", and you then derive a second Form from that first one, the derived Form does not correctly inherit the WindowState from its parent. It will often end up with a WindowState of "Normal".

The same may be true of the "Minimized" state; I haven't tried it.

Repro steps:
1. Create new project: C#, type "Windows Application", any name.
2. Form1 is now open. In the Properties pane, set WindowState to "Maximized".
3. Build and run the program. The window is maximized, as it should be.
4. Select "Project > Add Windows Form..." from the menus. In the right pane (Templates), select "Inherited Form." Leave the name as "Form2.cs". Click Open. When the "Inheritance Picker" dialog comes up, select "Form1" as the base class.
5. Notice that over in the Properties pane, the WindowState for Form1 is "Normal", not "Maximized"! Oops.
6. Open Form1.cs, and in the Main() function, change "new Form1()" to read "new Form2()", so that Form2 is the one that will be launched by the program.
7. Run the program. Despite the fact that the Properties pane said "Normal", the program is in fact maximized. Oops.
8. Open Form2 in the Designer. Drop a button on it. Doing this will force Visual Studio to re-generate the Form2.InitializeComponent() function.
9. Run the program again. Now, notice that it is NOT maximized! Oops.

You'll find that you can manually change WindowState back to "Maximized", but then, from time to time (I think mainly when you reload the project), Visual Studio will switch it back to Normal.

Mike Morearty
mike@morearty.com
http://www.morearty.com

How to create a container control

Fairytale24-Nov-01 2:37

Fairytale

24-Nov-01 2:37

Hi folks,
I recently stumbled about an annoying problem while designing components:
It just seems impossible to me to create a control that allows other controls to be put upon at designtime.
As far as I understood the MSDN every control derived from UserControl has the ability to support child controls. That works ok when adding controls simply by code but I can't add them using the designer.
I tried to set AllowDrop to true and played around with the DragDrop events. The problem is I didn't found a way to extract the control from the DragEventArgs parameter (if it is there at all).
Confused | :confused:

Would be great if anybody could tell me how to create a control that act like the GroupBox for example, including visual component adding.

Thanks in advance,

Matthias

Re: How to create a container control

Makyana17-Dec-01 9:55

Makyana

17-Dec-01 9:55

Replace :
System.Windows.Forms.UserControl

with :
System.Windows.Forms.ContainerControl

Running an external program

Tariq20-Nov-01 19:25

Tariq

20-Nov-01 19:25

Hello,
How can i get a bit of C# code to launch an external program (for instance notepad) ?

Regards,
Tariq

Re: Running an external program

Andreas Philipson21-Nov-01 4:20

Andreas Philipson

21-Nov-01 4:20

System.Diagnostics.Process.Start ("notepad.exe");

Check out the documentation on the System.Diagnostics.Process class for more info...

Andreas Philipson

Re: Running an external program

Tariq21-Nov-01 7:17

Tariq

21-Nov-01 7:17

Thanks for the information. Appreciate it Smile | :)

But I still have one doubt. That is, how do i pass parameters to the application I am trying to run.

eg . notepad test1.txt

I tried giving it in the file name - but that doesnt work.
I couldnt find any other relevant property to achieve this.

Can you help?

Regards,
Tariq

Re: Running an external program

Andreas Philipson21-Nov-01 8:19

Andreas Philipson

21-Nov-01 8:19

using System.Diagnostics;

ProcessStartInfo notepad = new ProcessStartInfo ("notepad.exe", "C:\\SomeFile.txt");
Process.Start (notepad);

Andreas Philipson

GetProcesses(string machinename) method...

20-Nov-01 12:12

Hi,

Has anyone tried using the Process.GetProcesses(string machinename) overload of the Process class in the System.Diagnostics? I am using VS.NET beta 1. I am badly in need of viewing (just viewing!!!) the processes running on a different machine on the same domain.

Can someone help me please?

Thanks.

XML in function descriptions doesn't correctly deal with less-than and greater-than

Mike Morearty18-Nov-01 19:47

Mike Morearty

18-Nov-01 19:47

As everyone probably knows, in C# (and probably other .NET languages), you can put comments at the top of any class or function in this format (this example is for a function):

/// <summary>super-duper function</summary>
/// <param name="thing">the first parameter</param>
void MyFunction(string thing)

The great thing is that C# will automatically use these comments when doing tooltips for auto-complete. I love that.

Unfortunately, it seems that auto-complete does not correctly deal with < and > characters when they appear in the XML. For example, if the following XML appears above a function:

/// <summary>If x &lt; y then do something</summary>

...then that is exactly how auto-complete will display the description of the function. It should be doing standard "entity" conversion, e.g. converting < to < and > to > and so on. (You can't just put < into the summary itself, because that's not legal in XML. Try it -- you'll get an error message in the auto-complete tooltip.)

For another example of this, try typing "Directory.GetLogicalDrives(" into a C# file, and observe that the tooltip that comes up says:

Retrieves the names of the logical drives on this computer
in the form "&lt;driver letter&gt;:\".

Oops. Microsoft, please fix the tooltip code?

By the way, Visual Studio's utility for creating HTML documentation (Tools menu, "Build Comment Web Pages..." command) DOES correctly deal with < and > in the XML.

Mike Morearty
mike@morearty.com
http://www.morearty.com

Re: XML in function descriptions doesn't correctly deal with less-than and greater-than

Paul Watson21-Nov-01 4:57

Paul Watson

21-Nov-01 4:57

I might have the wrong end of the stick here but I remember back when I first looked into XML that you had to define the "data type" of the XML entity for odd characters and entity-conversion to display properly.

Unfortuanatley I am not near my XML book or VS.NET so I cannot remember how to do it, but if you know what I mean then see if defining that data type will help. Not the best solution but it might work Smile | :)

regards,
Paul Watson
Bluegrass
Cape Town, South Africa

Do you Sonork? I do! 100.9903 Stormfront

"The greatest thing you will ever learn is to love, and be loved in return" - Moulin Rouge

EventLog or System.Diagnostics classes not working..

16-Nov-01 6:26

Hai,

I was testing the following code... But i get an error saying...
"The type or namespace name 'EventLog' does not exist in the class or namespace 'WriteToAnEventLog_csharp'."

Why is this so? What part am I missing? I am not using VS.NET Beta. I am using notepad to type this text and used, csc test.cs to compile the code.

Please help me....

using System;
using System.Diagnostics;

namespace WriteToAnEventLog_csharp
{
///

/// Summary description for Class1.
///

class Class1
{
static void Main(string[] args)
{
string sSource;
string sLog;
string sEvent;

sSource = "dotNET Sample App";
sLog = "Application";
sEvent = "Sample Event";

if (!EventLog.SourceExists(sSource))
EventLog.CreateEventSource(sSource,sLog);

EventLog.WriteEntry(sSource,sEvent);
EventLog.WriteEntry(sSource, sEvent, EventLogEntryType.Warning, 234);
}
}
}

Thanks.

Re: EventLog or System.Diagnostics classes not working..

Andreas Philipson16-Nov-01 11:57

Andreas Philipson

16-Nov-01 11:57

What command line parameters are you using?

you have to use the /r:System.dll to get it to compile...

try this:

csc /target:winexe /out:eventlog.exe class1.cs /r:system.dll

Andreas Philipson

Re: EventLog or System.Diagnostics classes not working..

20-Nov-01 12:15

the /r:System.dll is done automatically when you say csc class1.cs. Also I tried the second option that you told. No luck. But I got VS.NET beta 1 installed on my machine. I created a c# project, built it and its just ducky.

Thanks anyways.

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