C# Discussion Boards - CodeProject

Marco M.8-Aug-05 4:23

8-Aug-05 4:23

take a look at this article, it explains how you can use the ItemDataBound event to access each bounded row right before it's displayed, so you can do necessary changes..
http://www.codeproject.com/aspnet/ItemCreated.asp[^]

Marco M.

Re: Disabled CheckBox in a DataGrid

Adam Crowe8-Aug-05 7:13

Adam Crowe

8-Aug-05 7:13

I apologize for not mentioning this before, but my question regards to WinForms and not ASP.NET.

Thank you.

ListView row height

Rob Tomson7-Aug-05 15:55

Rob Tomson

7-Aug-05 15:55

Is there a way to adjust the height of the rows in a listview? It seems that the function GetItemRect gets called when painting the control but it's not virtual so I can't override it. Will I have to do all the painting myself?

Thanks,
Rob Tomson

--
There are 10 kinds of people. Those who understand binary and those who don't.

MenuItem inheritance Issue

ekynox7-Aug-05 15:25

ekynox

7-Aug-05 15:25

Hi Folks,

I just was experimenting with customizing the MenuItem class to suit my needs. I have introduced an accessor method which handles an additional string variable in my inherited class called PJMenuItem.

PJMenuItem pjmi = new PJMenuItem();
pjmi.ExtraInfo = "c:\\temp\\";
pjmi.Text = "HelloWorld";
cm.MenuItems.Add(pjmi.Text,new System.EventHandler(LaunchAction));

Now the problem becomes that each time the menuitem gets invoked via the LaunchAction event handler an exception message gets thrown. Stating that the specified cast is invalid. The event handler is defined as

private void LaunchAction(object sender, System.EventArgs e)
{
try
{
PJMenuItem pjmi = (PJMenuItem) sender;
MessageBox.Show(pjmi.ExtraInfo.ToString());
}
catch(System.Exception ee)
{
MessageBox.Show(ee.ToString());
}
}

Can anyone please tell me how I can overcome this exception error ???

thanks

Re: MenuItem inheritance Issue

Rob Graham7-Aug-05 17:11

Rob Graham

7-Aug-05 17:11

You're using the wrong overload of the Add method. Passing a string as the frst parameter causes a new MenuItem to be created for you, with the supplied text as the caption and the specified handler. You need to specify the handler in your PJMenuItem constructor (and pass it to the base class constructor) then used the version of the Add method that takes a reference to the menuitem.

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

Re: MenuItem inheritance Issue

ekynox10-Aug-05 2:41

ekynox

10-Aug-05 2:41

g'day Rob

Would it be possible for you to give me another example of your explanation as I am unable to follow through. The point I am having difficulty is with the part where you said i need to specify the event handler in the constructor and then passing it to the base class constructor.

I am refering to the following article on msdn about base class constructors:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vclrfbasepg.asp

But I cant seem to draw a correlation between the msdn article and your explanation.

I would really appreciate it if you could give me another example.

thanks.

Re: MenuItem inheritance Issue

ekynox10-Aug-05 2:54

ekynox

10-Aug-05 2:54

G'day again Rob,

I read your post again and again inconjunction with Uncle gate's article, I finally understood it. Thanks for helping me out.

Cmd Shell Output

Member 21753597-Aug-05 11:48

Member 2175359

7-Aug-05 11:48

How can I capture output from cmd? From executing some command in cmd like "tracert" or "ping"...

Thankss....

Re: Cmd Shell Output

Guffa7-Aug-05 12:18

Guffa

7-Aug-05 12:18

What do you use to execute the command?

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

Re: Cmd Shell Output

Matt Gerrans7-Aug-05 16:59

Matt Gerrans

7-Aug-05 16:59

Have a look at System.Diagnostics.Process.StartInfo.RedirectStandardOutput.

Matt Gerrans

Re: Cmd Shell Output

Member 21753598-Aug-05 5:29

Member 2175359

8-Aug-05 5:29

thx a lot

it's working very well Smile | :)

opengl prob

caffeinism7-Aug-05 8:24

caffeinism

7-Aug-05 8:24

okay, here it is. i have this
as my opengl window, on load, and this image i need to draw fullscreen. basically the code looks like this:
this.ClientSize = new System.Drawing.Size(640, 480);,
GL.glVertex3f(0f,0f,0f);
GL.glVertex3f(640f,0f,0f);
GL.glVertex3f(640f,480f,0f);
GL.glVertex3f(0f,480f,0f);, and
GL.glOrtho(0,640,0,480,0,1);. as previously stated, i want the image to be drawn in the exact amount of pixels that it came with. in case pointers arent enough and a whole source fix is needed, the source for tyhe entire program can be found here. thanks for your time

This prints "0" . Want "0.0" NEED CODE

...---...7-Aug-05 7:58

...---...

7-Aug-05 7:58

//Label x axis. Trying to label graph axes on a WinForm
Font graphFont = new Font("Arial",8);
Brush graphBrush = new SolidBrush(Color.BlueViolet);
float x = 0.0f;
String xString = x.ToString();

for(float gx = xIndent; gx <= graphRect.Width; gx += gx)
{
g.DrawString(xString, graphFont, graphBrush, this.ClientRectangle.Left + xIndent, yOrigin + 4);
}
//THANKS FOR ANY HELP.....

Re: This prints "0" . Want "0.0" NEED CODE

Rob Graham7-Aug-05 8:15

Rob Graham

7-Aug-05 8:15

see reply below. No need to repost...

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

Re: This prints "0" . Want "0.0" NEED CODE

...---...7-Aug-05 9:14

...---...

7-Aug-05 9:14

Rob,
EXACTLY what my App needed.Didn't even know there was such a thing as
"current culture". Many thanks.....

Re: This prints "0" . Want "0.0" NEED CODE

Rob Graham7-Aug-05 9:26

Rob Graham

7-Aug-05 9:26

If you ever intend to write applications that might be used outside your country, you should read up on the CultureInfo[^]and System.Globalization [^] Name space. Most of the string formatting and comparison functions in .NET have overloads that expect culture specific parameters, and it is generally recommended that you use these to get predicatable results in all languages.

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

File System Watcher

cmarmr7-Aug-05 7:43

cmarmr

7-Aug-05 7:43

how do i make my file system watcher watch my dir and all it subdir to i have to create a file system watcher for each sub dir too.

Thanks
chad

Re: File System Watcher

Mohamad Al Husseiny7-Aug-05 8:30

Mohamad Al Husseiny

7-Aug-05 8:30

if i understand what you want correctly
what about IncludeSubdirectories Property
indicating whether subdirectories within the specified path should be monitored

fileSystemWatcher.IncludeSubdirectories=true

MCAD

Re: File System Watcher

cmarmr7-Aug-05 9:46

cmarmr

7-Aug-05 9:46

thank you so much i forgot about that property

chad

Delete last row from a datagrid bound to an arraylist, without getting index out of range when picking another row afterwards.?

spAAwn7-Aug-05 5:51

spAAwn

7-Aug-05 5:51

Hi!

Im using an arraylist bound to a datagrid to show some info. I also let the user delete rows from the datagrid using a contextmenu. IE rightclick on the row, choose "delete item", and the row disappears.

Everything works fine except when I delete the last row, then when I choose another row I get a "Index out of range exception".

this is my deletemethod:

private void DeleteItem(object sender, System.EventArgs e)
{
//get the index of the selected Item, same index in the ArrayList
int index = commentGrid.CurrentCell.RowNumber;

try
{
comments.Comments.RemoveAt(index);

if (comments.Comments.Count < 1)
{
menuItemExport.Enabled = false;
toolBar.Buttons[2].Enabled = false;
}

dataChanged = true;

commentGrid.DataSource = null;
commentGrid.Refresh();

commentGrid.DataSource = comments.Comments;
commentGrid.Refresh();

}
catch(ArgumentOutOfRangeException)
{
return;
}
}

I heard this was some kind of bug in .NET, but I dont know how to work around the problem! Any help is much appreciated.

thanks!

/Rickard

A text control that responds to the event when "Enter" key is pressed

shahzadbahi7-Aug-05 2:38

shahzadbahi

7-Aug-05 2:38

Actually I am looking for a text control that responds to the "Enter" key event i.e. when the enter key is pressed the event handler for it is called.

Actually what i want do is that when enter key is pressed the focous shift to the next control.

Will be very thankful for you help

Your! Smile | :)

shahzad zafar siddiqui

Re: A text control that responds to the event when "Enter" key is pressed

Mohamad Al Husseiny7-Aug-05 6:03

Mohamad Al Husseiny

7-Aug-05 6:03

You can achive what you want by handle keypress event
Catch enter key
Set The Focus to the next control
Try some thing like this

<code>
private void Text_KeyPress
(object sender,System.Windows.Forms.KeyPressEventArgs e)
{
        if(e.KeyChar==(char)13)
	{
         //GetNextControl Method of Form
	this.GetNextControl(textBox1,true).Focus();
	e.Handled=true;
	}
}
</code>

MCAD

Re: A text control that responds to the event when "Enter" key is pressed

nidhelp7-Aug-05 15:04

nidhelp

7-Aug-05 15:04

hi
i want to do something like u.. when the user press "enter" after keying in some information in the textbox, it'll open something for display, for my case it's opening a tab page..

i tried the method above but it cant work.. i donno why..

my button is button3, textbox is textBox4 and it will open a tab page called tabPage6..

btw what does (char)13 mean in >> if(e.KeyChar==(char)13) ?
why is there a 13 and must i use it in my program too?

thanks

Re: A text control that responds to the event when "Enter" key is pressed

Rob Graham7-Aug-05 16:41

Rob Graham

7-Aug-05 16:41

13 is the numeric value of the character sent by the enter key.

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

Re: A text control that responds to the event when "Enter" key is pressed

Mohamad Al Husseiny7-Aug-05 21:02

Mohamad Al Husseiny

7-Aug-05 21:02

nidhelp wrote:
i want to do something like u.. when the user press "enter" after keying in some information in the textbox, it'll open something for display, for my case it's opening a tab page..

i tried the method above but it cant work.. i donno why..

my button is button3, textbox is textBox4 and it will open a tab page called tabPage6

you can modify the code above to do what you want
the code did not work because -i think- the tabcontrol not the next control to textbox i mean if textbox tabindex=7 the tabcontrol should be 8
you can do somthing like that

private void Text_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
		{
			if(e.KeyChar==(char)13)
			{
			
    			//this.GetNextControl(textBox1,true).Focus();
				tabControl1.Focus();
				tabControl1.SelectedTab=tabPage2;
				e.Handled=true;
			}

		}

nidhelp wrote:
btw what does (char)13 mean in >> if(e.KeyChar==(char)13) ?
why is there a 13 and must i use it in my program too?

as rob said this the value of enterkey as this numric value and KeyChar type is Char so we need to cast it
in other word convert numric value to char
one of the method to do that is
(char)13 which wil do the conversion

if you want to know the value of other key
look at
Keys Enumeration[^]

MCAD

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