C# Discussion Boards - CodeProject

marmosha16-Dec-05 23:06

16-Dec-05 23:06

hi all, do any of you have an idea about the methods that used to generate user id?
i think it is called GUID,,
thank you for any help

marmosha

Re: generate user id

Colin Angus Mackay16-Dec-05 23:38

Colin Angus Mackay

16-Dec-05 23:38

marmosha wrote:
do any of you have an idea about the methods that used to generate user id?
i think it is called GUID

Well, strictly speaking a GUID is a Globally Unique Identifier rather than just a User ID. Of course, you can use them as user IDs, especially if there are many distributed computers generating the IDs because the algorithm used is supposed to guarantee uniqueness.

See: System.Guid.NewGuid[^]

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How can I get objects sequently???

Sina_Ad16-Dec-05 19:16

Sina_Ad

16-Dec-05 19:16

Hi
I have 90 textbox and I want to manage them
their names are finished with two numbers that help me to manage but I cant call them
I should manage them like this
textbox11.hide();
textbox22.hide(); and so on
how can i manage them by their name???

Re: How can I get objects sequently???

mav.northwind16-Dec-05 20:33

mav.northwind

16-Dec-05 20:33

Hi!

First of all you should consider modifying your design!
Can you really tell by heart what textbox67 is used for? I strongly doubt that having 90 textboxes on a single form will produce a practical user interface...

Nevertheless, you can iterate over your Form's Controls collection like this:

foreach (Control c in this.Controls)
{
  if ((c.Name == "textbox47" || c.Name == "textbox83") && textbox77.Text!="")
  {
    c.Hide();
  }
}

Regards,
mav

Re: How can I get objects sequently???

Dave Kreskowiak17-Dec-05 8:35

Dave Kreskowiak

17-Dec-05 8:35

90 TextBoxes on a single form?!?!?! Are all of these textboxes really related to the purpose of the form, or are you dividing the form up into sections with each section doing something different?

Just my humble opinion, but...
Watch as the mouse pointer goes to the Start button, a click is heard, then Control Panels, and again on Add/Remove Programs... Oh! The carnage, as your app is removed by the users because of a clunky, confusing, yet convoluted interface...

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

LookupEdit of DevExpress

nps_ltv16-Dec-05 16:47

nps_ltv

16-Dec-05 16:47

Hi,

I'm using a LookUpEdit in my XtraGrid, which I connect to a datasource at
runtime. When I select a value from the LookUpEdit, everythings fine, the
selected value is shown in the cell, but when this cell loses its focus, the
cell becomes empty.

When I use a ComboBox which I manually fill at runtime, I do not have this
problem.

Any Ideas on solving this problem? Please help me!

Thanks.

NPS.

Re: LookupEdit of DevExpress

AETaylor17-Dec-05 2:54

AETaylor

17-Dec-05 2:54

Have you set the Properties.DisplayMember & Properties.ValueMember?

Re: LookupEdit of DevExpress

nps_ltv18-Dec-05 14:36

nps_ltv

18-Dec-05 14:36

Yes.

NPS.

Re: LookupEdit of DevExpress

AETaylor18-Dec-05 19:37

AETaylor

18-Dec-05 19:37

Hmm, well that's pretty much all I do.

1) Set the Properties.DataSource
2) Set the Properties.ValueMember
3) Set the Properties.DisplayMember
4) Set up the Properties.Columns

If the data is missing after you move away, is the lookup dataset being closed?

Get active window title

ricny04616-Dec-05 11:50

ricny046

16-Dec-05 11:50

How can I get the title from a program that is active?

I will develop a program that logs every program that a user have used. For example if someone opens notepad I want to retrieve "Untitled - Notepad"

I'm using .NET 2.0

Thanks!

Re: Get active window title

g00fyman16-Dec-05 15:27

g00fyman

16-Dec-05 15:27

You need to use the Windows API to lookup that sort of information, and get an IntPtr to the window

perhaps this[^] will help

kind regards,
g00fy

Re: Get active window title

Jared Parsons17-Dec-05 10:59

Jared Parsons

17-Dec-05 10:59

<br />
<br />
public class Foo<br />
{<br />
<br />
[DllImport("user32.dll")]<br />
public static extern IntPtr GetForegroundWindow();<br />
<br />
[DllImport("user32.dll", CharSet=CharSet.Auto)]<br />
public static extern uint GetWindowText(IntPtr hwnd, StringBuilder text, int maxCount);<br />
<br />
public string GetActiveWindowText()<br />
{<br />
  IntPtr hwnd = GetForegrondWindow();<br />
<br />
  StringBuilder builder = new StringBuilder(255);<br />
  GetWindowText(hwnd, builder, 255);<br />
  return builder.ToString();<br />
}<br />

Jared Parsons
jaredp@beanseed.org
http://spaces.msn.com/members/jaredp/

Re: Get active window title

S. Senthil Kumar18-Dec-05 2:13

S. Senthil Kumar

18-Dec-05 2:13

You're looking for Process.MainWindowTitle[^].

Regards
Senthil
_____________________________
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Re: Get active window title

Jared Parsons18-Dec-05 8:45

Jared Parsons

18-Dec-05 8:45

That doesn't get the result he wants. To use that method you need a process instance. He wants to get the title of the window the user is interacting with. For that he needs some equivalent of GetForegroundWindow().

Jared Parsons
jaredp@beanseed.org
http://spaces.msn.com/members/jaredp/

Changing the selection of a combobox based off what was selected

SeanCM16-Dec-05 11:39

SeanCM

16-Dec-05 11:39

Hi,

I am trying to change the selection of a combobox but am unable to do so, or that is to say I am unable to figure out what event I need to use or how to do it properly...perhaps a more detailed explanation will suffice.

I have some items in my combobox like:
Item A (1)
Item B (2)
Item C (43)
Item D (57)

When the user selects one I want to place the number that is in parens in combobox.Text.

The problem is I can't seem to figure out how to do this. I used the event SelectedValueChanged but as soon as the event is done, the picked value goes in. Here is the code:

private void _cbo_SelectedValueChanged(object sender, System.EventArgs e)
{
   int index1 = _cbo.Text.IndexOf("(") + 1;
   int index2 = _cbo.Text.IndexOf(")");
   _cbo.Text = _cbo.Text.Substring(index1, index2 - index1);
}

The code works I see the text in the combobox but then it is replaced with what the user selected again.

Any help would be greatly appreciated.

Sean

Re: Changing the selection of a combobox based off what was selected

TheGreatAndPowerfulOz16-Dec-05 11:49

TheGreatAndPowerfulOz

16-Dec-05 11:49

you may also need to set one of

SelectedText
SelectedItem

Re: Changing the selection of a combobox based off what was selected

SeanCM2-Jan-06 19:42

SeanCM

2-Jan-06 19:42

I have tried messing with those and get some very odd results. I am missing something, I must have the wrong event. Any other ideas?

Sean

hide printers visible in PrintDialog

cobra200516-Dec-05 11:19

cobra2005

16-Dec-05 11:19

Is there a way to "hide" some of the printers that are normally seen in a PrintDialog? I have an application that's required to show only the printers (not faxes or imaging drivers) when printing or only faxes when faxing.

cobra2005

Re: hide printers visible in PrintDialog

Dave Kreskowiak17-Dec-05 8:24

Dave Kreskowiak

17-Dec-05 8:24

Only if you create your own PrintDialog and enumerate the installed printers yourself. The system and .NET PrintDialogs will show all installed printers, no matter what type they are.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

first frame of video

munmat16-Dec-05 11:13

munmat

16-Dec-05 11:13

hello ...
I need to extract the first frame of a given video and convert it to an image .
i'm developing an editor for HTML using C#.
i want to use it when a webbrowser fails to download a video
as follows

Escape sequence in xml output?

pankazmittal16-Dec-05 11:01

pankazmittal

16-Dec-05 11:01

Hi
I am dumping a table's data into xml document using C#. I am getting the data but the problem is that "<" character appears as "& l t ;" (I inserted the empty space intentionally).

Similarly, there are other characters appearing incorrectly.

What should I do to make it appear correctly like "<" . Please advise.

Thanks

Pankaj

-- modified at 17:14 Friday 16th December, 2005

Re: Escape sequence in xml output?

Nish Nishant16-Dec-05 11:13

Nish Nishant

16-Dec-05 11:13

pankazmittal wrote:
that "<" character appears as "<".

pankazmittal wrote:
it appear correctly like "<" .

Re: Escape sequence in xml output?

pankazmittal16-Dec-05 11:18

pankazmittal

16-Dec-05 11:18

its actually
"<" character appears as "& l t ;" (remove empty spaces )

Re: Escape sequence in xml output?

TheGreatAndPowerfulOz16-Dec-05 11:14

TheGreatAndPowerfulOz

16-Dec-05 11:14

you must be outputing the XML yourself.

System.Xml.XmlDocument

Re: Escape sequence in xml output?

Guffa16-Dec-05 11:22

Guffa

16-Dec-05 11:22

Where are they appearing incorrectly? If you mean that they are stored that way in the xml file, it's not incorrect, they have to be stored that way.

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

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