C# Discussion Boards - CodeProject

Imagelist transparency bug

15-Oct-05 4:45

You create an event handler for the paint event of the element where you want them drawn. Invalidate the element to cause it to be redrawn.

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using C1TrueDBGrid

deep714-Oct-05 23:59

deep7

14-Oct-05 23:59

hi,
i have a problem.i'm usin Component one TrueDbGrid. Also i have dragged a dateTimePicker on it..as per the samples which Component One had, i wrote the code for a particular column to be of type "dateTimpicker"..ther code comes in RowColChange event of the trueDbGrid...
private void c1TrueDBGrid1_RowColChange(object sender, C1.Win.C1TrueDBGrid.RowColChangeEventArgs e)
{
// position the datetime picker on the "BirthDate" column only
C1.Win.C1TrueDBGrid.C1DataColumn col = this.c1TrueDBGrid1.Splits[0].DisplayColumns[this.c1TrueDBGrid1.Col].DataColumn;
if( col.DataField == "BirthDate" )
{
// get the area of the cell
Rectangle r = this.c1TrueDBGrid1.Splits[0].GetCellBounds(this.c1TrueDBGrid1.Row, this.c1TrueDBGrid1.Col);
// change to screen coordiantes
r = this.c1TrueDBGrid1.RectangleToScreen(r);
// map the screen coordinates to the forms client coordinates
this.dateTimePicker1.Location = this.RectangleToClient(r).Location;
// size it to fit inside the cell
this.dateTimePicker1.Size = r.Size;
// default the dateTimePicker to the date in the cell
this._bIgnoreChange = true;
this.dateTimePicker1.Text = col.CellText(this.c1TrueDBGrid1.Row);
this._bIgnoreChange = false;
// display it
this.dateTimePicker1.Visible = true;
}
else
this.dateTimePicker1.Visible = false;
}

so here if the col == "BirthDate", then tat field where i've clicked, becomes of dateTimPicker...but my problem is the dateTimepicker is visible but it doesn't get the correct size and location...y this happens i dont understand...

plz..help me..m stuck...

g00fyman14-Oct-05 23:55

I can't convert a var string to a var int

14-Oct-05 23:55

is there a fix for this so called bug ?

i am getting my icons from Win32.SHGetFileInfo(), then adding it to an imagelist on a treeview, but they appear black where they should be transparent. i am not setting any transparent colour, but form what i remember last time i tried this it didnt do anything anyway.

is there a solution ?

kind regards,
g00fy

search for files

Mridang Agarwalla14-Oct-05 22:57

Mridang Agarwalla

14-Oct-05 22:57

how can i find all the ZIP files in a particular directory and its subdirectories.

Re: search for files

Rob Philpott15-Oct-05 8:12

Rob Philpott

15-Oct-05 8:12

System.IO.Directory and System.IO.DirectoryInfo have methods for returning files and subdirectories (GetDirectories(), GetFiles() etc.) which you can use for this.

Are you looking for ZIP files just in the immediate subdirectories, or in all subdirectories of subdirectories of subdirectories etc?

Rob Philpott

tinh cau14-Oct-05 21:32

tinh cau

14-Oct-05 21:32

help me

Re: I can't convert a var string to a var int

Guffa14-Oct-05 22:02

Re: I can't convert a var string to a var int

14-Oct-05 22:02

It would be helpful if you informed us about the reason for your inability to convert the string.

If the string contains anything that can be converted to an int, it's easy:

myInt = Convert.ToInt32(myString)

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Andrew Kirillov14-Oct-05 22:05

Andrew Kirillov

14-Oct-05 22:05

Hello

May be you need to try this:
int.Parse( str )

or this:
Convert.ToInt32( str )

With best regards,
Andrew Kirillov, MCP x 3
Prize winner, August 2005

Richtextbox scrolling

Anonymous14-Oct-05 18:30

Anonymous

14-Oct-05 18:30

Hi all,

I have a richtextbox and a vertical scrollbar on the form

now when i enter text into the richtextbox after it exceeds it's height

the scrollbar for the richtext is shown and we can scroll the contents of the

richtext,

Now i want to hide this scrollbar and want the contents to be scrolled

using the vertical scrollbar that i have put on the form.

Any code or hint will be helpful

Thanks and Regards,

Pramod

g00fyman15-Oct-05 0:02

15-Oct-05 0:02

set your scrollbars to 'none' and use the SendMessage API call to control the scrolling

e.g.,

<br />
using System.Runtime.InteropServices;<br />
<br />
private const int WM_SCROLL = 276; // Horizontal scroll<br />
private const int WM_VSCROLL = 277; // Vertical scroll<br />
private const int SB_LINEUP = 0; // Scrolls one line up<br />
private const int SB_LINELEFT = 0;// Scrolls one cell left<br />
private const int SB_LINEDOWN = 1; // Scrolls one line down<br />
private const int SB_LINERIGHT = 1;// Scrolls one cell right<br />
private const int SB_PAGEUP = 2; // Scrolls one page up<br />
private const int SB_PAGELEFT = 2;// Scrolls one page left<br />
private const int SB_PAGEDOWN = 3; // Scrolls one page down<br />
private const int SB_PAGERIGTH = 3; // Scrolls one page right<br />
private const int SB_PAGETOP = 6; // Scrolls to the upper left<br />
private const int SB_LEFT = 6; // Scrolls to the left<br />
private const int SB_PAGEBOTTOM = 7; // Scrolls to the upper right<br />
private const int SB_RIGHT = 7; // Scrolls to the right<br />
private const int SB_ENDSCROLL = 8; // Ends scroll<br />
<br />
[DllImport("user32.dll",CharSet=CharSet.Auto)]<br />
private static extern int SendMessage(IntPtr hWnd, int wMsg,IntPtr wParam, IntPtr lParam);<br />

then call SendMessage() and the way you want to scroll Smile | :)

hope that helps
g00fy

AB777115-Oct-05 2:55

AB7771

15-Oct-05 2:55

Thanks for ur reply

but i want to know when we use the default scroll bar of

the richtextbox then how to know whether the scroll is up or down

hope u get ny problem

Thanks and Regards,

Pramod

mav.northwind15-Oct-05 22:43

mav.northwind

15-Oct-05 22:43

Override the WndProc of your RichTextBox and catch the scrollin messages there.

Regards,
mav

getting folder size from windows

AB777116-Oct-05 19:08

AB7771

16-Oct-05 19:08

Hi mav,

i have done the same thing but i'm not

able to catch the scrolling event of richtextbox there

it capture's the scroll event of the vertical scroll bar

that i have placed on the form

can u give any idea to catch the scroll event of

the Richtextbox in the wndProc Method

Thanks

Pramod

g00fyman14-Oct-05 18:19

Re: getting folder size from windows

14-Oct-05 18:19

hi to all, Smile | :)

i am writing an app that lets users browse a folder. so they can perform several file/folder tasks on that folder and its subfolder/file.

i would like to be able to display teh folder stats when they open the top level folder.
at the moment, i am using directoryinfo and fileinfo and recursivley iterating the entire structure from the top level folder down, jsut to get the filesize.

is there a way to grab this from windows any quicker than this, cause if they select a drive ... well u know whats going to happen. i am also only building the tree structure that reflects the filesystem to a certain depth until they click to that depth i dont go any further.

if there is no other way to get folder size i might try creating the entire tree structure in the same recursive loop and see if the overhead is too much

any ideas pls??

regards,
g00fy

Guffa14-Oct-05 22:07

Re: getting folder size from windows

14-Oct-05 22:07

The total size of the contents of a folder is not stored anywhere. If you can get that information from the system, it will be doing exactly what you are doing yourself, recursively looping through every subfolder to sum up the file sizes.

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g00fyman14-Oct-05 22:14

Re: getting folder size from windows

14-Oct-05 22:14

thans for the reply,

i thought that after i posted, as i tried it on a folder and watched the count go up.

i just optimised my recursion and its working quite well now, it seems to beat the windows effort for the same folder on the same machine and i'm generating the tree for the structure as well. maybe windows is doing some indexing on the first size check as the next time you do it, it is faster.

thanx again,
g00fy

Guffa14-Oct-05 22:36

code about case-based reasoning

14-Oct-05 22:36

The reason it's faster on the second go, is that the most of the clusters containing the directory information is still in the disk cache. On the first go all the clusters has to be retrieved from the disk.

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Rachel.S Shen14-Oct-05 16:15

Rachel.S Shen

14-Oct-05 16:15

hi I'm a complete learner about c# programming,I need some source code with the algorithm of case-based resoning.

pls help me Smile | :)

thanks in advance

Re: code about case-based reasoning

...---...14-Oct-05 16:53

...---...

14-Oct-05 16:53

Hi,
You need what is called a "switch" statement for "case based reasoning".
I would give you some code but what you are asking is so fundamental to almost any programming language
that I would suggest that you consult the MSDN help or any C# text (only so you really understand what you are doing). In addition,"case based reasoning (as you call it) is found in C, C++ C# etc..
so if you are looking for an easy way out you are cheating yourself

hope this helps.....

Re: code about case-based reasoning

Guffa14-Oct-05 22:09