Re: Where is the Application Object? - C# Discussion Boards

Re: Transparency

Den2Fly24-Oct-03 7:28

Den2Fly

24-Oct-03 7:28

Thanks for the reply.

any other idea?

---
"Art happens when you least expect it"

Simple XPath Question

antoine@orchus-tech23-Oct-03 9:55

antoine@orchus-tech

23-Oct-03 9:55

Hi,

Having not found a good XPath tutorial out there yet, here is my question..

This is how I try to display the fisrtname of the first contact in the Contact.xml file,
Consider this code:

XmlDocument myDoc = new XmlDocument();<br />
myDoc.Load(Application.StartupPath + "\\Contact.xml");<br />
txtPrénom.Text =  myDoc.SelectSingleNode("//Prenom").Value;

What am I missing here?
Thank you for your help!

Antoine

This by our hands that dream,
"I shall find a way or make one!"

Re: Simple XPath Question

Christian Graus23-Oct-03 11:40

Christian Graus

23-Oct-03 11:40

try

txtPrénom.Text = myDoc.SelectSingleNode("//Prenom[first()]").Value;

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

Re: Simple XPath Question

Tomas Petricek23-Oct-03 12:26

Tomas Petricek

23-Oct-03 12:26

SelectSingleNode returns first node matching XPath so your code should IMHO work, but only if "Prenom" is element (not attribute). To select attrbute you need to use this XPath //@Prenom. You can also use xpath like following:

Xml:

<contacts>
  <contact firstname="Bill">
  ...
  <contact>
...
</contacts>
<br /><br />
XPath: <code>contacts/contact/@firstname</code> returns 'Bill'

Great XPath tutorial is at www.w3schools.com[^].

Tomáš Petříček Sheep | [baah]

EeekSoft Tools
www.eeeksoft.net

Re: Simple XPath Question

hravn24-Oct-03 7:16

hravn

24-Oct-03 7:16

Better tutorial at http://www.zvon.org/xxl/XSLTreference/Output/index.html[^] ... Wink | ;)

Re: Simple XPath Question

John Arlen24-Oct-03 7:25

John Arlen

24-Oct-03 7:25

You have the right idea, but it depends on your actual XML.

I suggest getting the node directly and looking at it. This will help answer your question.

<names><Prenom>Dog</Prenom><Prenom>Cat</Prenom></names>

XmlNode node = doc.SelectSingleNode("//Prenom");
node.Value == null
node.InnerText == "Dog"

A brand new Bug in the .net datagrid :(

livss23-Oct-03 7:27

livss

23-Oct-03 7:27

Hi!

The point is that while scrolling within a datagrid, sometimes the gridloses focus with no reason because I was just scrolling.The class below simply illustrates this(while scrolling you'll get a message)

Thank you in advance.
ps: I'm using vs.net 2003.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace test2k3
{
///

/// Summary description for Form1.
///

public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.DataGrid dg;
private DataTable dt;
private System.Windows.Forms.Button button1;
///

/// Required designer variable.
///

private System.ComponentModel.Container components = null;

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
dt = new DataTable();
DataColumn dc = new DataColumn("Nr");
dt.Columns.Add(dc);

for(int i = 0 ; i < 100; i++)
{
DataRow dr = dt.NewRow();
dr[0] = "row #"+i;
dt.Rows.Add(dr);
}
this.dg.DataSource = dt;
}

///

/// Clean up any resources being used.
///

protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
///

/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///

private void InitializeComponent()
{
this.dg = new System.Windows.Forms.DataGrid();
this.button1 = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.dg)).BeginInit();
this.SuspendLayout();
//
// dg
//
this.dg.DataMember = "";
this.dg.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dg.Location = new System.Drawing.Point(24, 16);
this.dg.Name = "dg";
this.dg.Size = new System.Drawing.Size(160, 128);
this.dg.TabIndex = 0;
this.dg.Leave += new System.EventHandler(this.dg_Leave);
//
// button1
//
this.button1.Location = new System.Drawing.Point(232, 64);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(56, 32);
this.button1.TabIndex = 1;
this.button1.Text = "button1";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(328, 173);
this.Controls.Add(this.button1);
this.Controls.Add(this.dg);
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.dg)).EndInit();
this.ResumeLayout(false);

}
#endregion

///

/// The main entry point for the application.
///

[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void dg_Leave(object sender, System.EventArgs e)
{
MessageBox.Show("You haven't leaved the grid.You've been just scrolling!","Is This A Bug?");
}

}

Re: Where is the Application Object?

leppie23-Oct-03 7:09

leppie

23-Oct-03 7:09

System.Windows.Forms.Application

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Re: Where is the Application Object?

shaunAustin26-Oct-03 21:56

shaunAustin

26-Oct-03 21:56

Erm...

Application.XXXX

HTH

Big Grin | :-D

-----------------------------------------------------------------------
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Re: Where is the Application Object?

Anonymous28-Oct-03 6:33

Anonymous

28-Oct-03 6:33

System.Windows.Forms.Application provides static function. I need to get 'this' instance of the Application, just like AfxGetApp provided in MFC, or the Application instance in VB.
Any ideas?

Where is the Application Object?

Anonymous23-Oct-03 5:55

Anonymous

23-Oct-03 5:55

Hey !

In VB we can easily access the Application object. This is also available in MFC as AfxGetApp().
What is the C# .NET equivalent?

Sized form for pocket pc

Member 51467223-Oct-03 4:57

Member 514672

23-Oct-03 4:57

Hello, I want to make a dialog with a given size for pocket pc.
For doing that I have derived my class from System.Windows.Forms.Form and I have set the property Size for my form with my prefered size. But the result is not what I have expected.
Do you know what can be the solution for my problem?

public class SelectionTool : System.Windows.Forms.Form
{

public SelectionTool(String title, String lblText){
InitializeComponent();

}

private void InitializeComponent()
{
//that line of code doesn't set the size for my form
this.Size = new Size(20,40);

.....

this.ShowDialog();
}

}

Ramona

_getch()

viliam23-Oct-03 2:58

viliam

23-Oct-03 2:58

I am C# beginner. I just started to practise
on console aplications.
And I already have problem.
How to supply C function _getch()
i.e. Get a character from the console.
Thanx

viliam

Re: _getch()

Mike Dimmick23-Oct-03 3:31

Mike Dimmick

23-Oct-03 3:31

Your best bet is probably to write a DLL in C that performs any low-level input, then use the Platform Invoke feature to access that.

You can also P/Invoke _getch directly.

[DllImport("msvcr71.dll", CallingConvention = CallingConvention.Cdecl)]
static extern int _getwch();

[STAThread]
static void Main(string[] args)
{
   Console.WriteLine( "Press any key to continue" );
   Console.Out.Flush();
 
   char ch = (char) _getwch();
 
   Console.WriteLine( "You pressed {0}", ch );
}

You must call Flush, because the Console class performs buffering on the stream. Failing to do so can cause the prompt to be displayed after _getwch executes, not before.

Note that I used the wide-character version, _getwch, because the CLR uses wide characters internally.

Re: _getch()

J. Dunlap23-Oct-03 8:53

J. Dunlap

23-Oct-03 8:53

What about Console.Read() ? Doesn't that work?

"A journey of a thousand miles begins with a single step." -- Confucius

FLUID UI Toolkit | FloodFill in C# & GDI+

Re: _getch()

leppie23-Oct-03 9:12

leppie

23-Oct-03 9:12

that still echos the character Frown | :(

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Seen on my Campus BBS: Linux is free...coz no-one wants to pay for it.

Re: _getch()

J. Dunlap23-Oct-03 9:17

J. Dunlap

23-Oct-03 9:17

Oh ok... I guess I missed the point of the post. D'Oh! | :doh:

"To know what is right and not do it is the worst cowardice." -- Confucius

FLUID UI Toolkit | FloodFill in C# & GDI+

Re: _getch()

shaunAustin26-Oct-03 21:58

shaunAustin

26-Oct-03 21:58

Actually I don't think you did... I'm sure he just wants to read some character from the console...

-----------------------------------------------------------------------
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Playing a simple sound with C#

bsargos23-Oct-03 1:52

bsargos

23-Oct-03 1:52

Hi,

I would enjoy playing a short custom sound with C# (like a beep) when the mouse moves over a button for example, like Ineternet Explorer does.
Would anybody help me ? Thanks.

Re: Playing a simple sound with C#

Judah Gabriel Himango24-Oct-03 4:25

Judah Gabriel Himango

24-Oct-03 4:25

Use managed DirectX or use P/Invoke to call the play sound method in the Win32 API.

The graveyards are filled with indispensible men.

How to configure an Ethernet connection?

azazel1234523-Oct-03 1:28

azazel12345

23-Oct-03 1:28

Hi all.

I'm trying to set the IP of my NIC's. I have found nice examples showing how to get the IP through the WMI, but how can I set it?

All hints are appreciated.

Regards,
Christian Sternell

Re: How to configure an Ethernet connection?

Giles23-Oct-03 3:03

Giles

23-Oct-03 3:03

As far as I know, you can't without going through the natice API, and configuring it with no DHCP, and then setting a static ip address.

"Je pense, donc je mange." - Rene Descartes 1689 - Just before his mother put his tea on the table.

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Re: How to configure an Ethernet connection?

azazel1234523-Oct-03 4:04

azazel12345

23-Oct-03 4:04

Thanks for the answer, Giles.

That was a little discouraging, but I'll see what I can do about it.

If anyone out there has a piece of code for this - please post if for me.

Regards,
Christian Sternell

Re: How to configure an Ethernet connection?

Kentamanos23-Oct-03 7:36

Kentamanos

23-Oct-03 7:36

I'm pretty sure I had a friend do it in C++ once using WMI (NetworkConfiguration class). If you can do it in C++, I would assume you could wrap it in C#.

C# with Mac OS-X

robi@robisoft.it23-Oct-03 0:48

robi@robisoft.it

23-Oct-03 0:48

Can I compile my c# application under MacOS-X? Confused | :confused:

Bye, Roberto Ferro

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