C# Discussion Boards - CodeProject

n00b question: change the height of an already open form

blackpenny157-Nov-06 2:15

7-Nov-06 2:15

Hi guys, first post, i'm just getting to grips with c#.net finally, should be a pro at the end of the week, anyway, i'm pretty used to vb.net so that might be why im having trouble.

Here is the issue:

Say for example my program.cs opens a form, we will call that Main_Form, and from Main_Form, i load another form, we will call this new form Sub_Form, how can i change the height of Main_Form from the code of Sub_Form, Main_Form is already open, i dont want to do a show dialog because that only good if the forms not open right?, i just want to access the properys of the already open Main_Form from the Sub_Form, i'm not really after changeing the height to be honest, i just can't work out how to play with an already open form without making a new instance of it.

I've done this in VB.net just can't do the same in C#.net, many thanks guys.

Si

Re: n00b question: change the height of an already open form

Martin#7-Nov-06 2:28

Martin#

7-Nov-06 2:28

Hello,

You need to have an reference of Main_Form in your Sub_Form.
You can do that with an property:

public Main_Form mymainform
{
get ...
set...
}

The Main_Form gives its instance to the Sub_Form property
//Main_Form code
this.sub_form.mymainform = this;

Your Sub_Form can now change Main_Form properties, like:
this.mymainform.Height = ...;

But there are much more elegant posibilities discriped in this article from Colin Angus Mackay:
http://www.codeproject.com/dotnet/passingvaluesbetweenforms.asp[^]

Hope that helps you.

All the best,

Martin

DataColumn.Expression

cecildt7-Nov-06 1:47

cecildt

7-Nov-06 1:47

Hi,

Why do the following statement not working:

DataColumn.Expression = "Value1 + \n + Value2"

Try to assign two strings which is below each other for multi-line text.

thanks

Re: DataColumn.Expression

cecildt7-Nov-06 2:01

cecildt

7-Nov-06 2:01

Fixed it myself. Sorry.

DataColumn.Expression = "ProjectCode +'"+Environment.NewLine+"' + ProjectDesc";

how can i change the exe image in VC#.Net

premkamalg7-Nov-06 1:02

premkamalg

7-Nov-06 1:02

hi everybody,
how can i change default exe icon in VC#.net

Thanks

Re: how can i change the exe image in VC#.Net

AB77717-Nov-06 1:09

AB7771

7-Nov-06 1:09

Select the project, Right Click -> Properties
On the properties page
under the resource section there is an option for Icon.

set that by browsing to the ico file.

hope that works for u.

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Does anyone here know Ghost Installer

JacquesDP7-Nov-06 0:24

JacquesDP

7-Nov-06 0:24

Just want to know if anyone here has any experience with Ghost Installer?

I downloaded the free version get the files added but when I run the setup.exe I get an error at the first file it tries to copy, says that it can't install file.

My apologies if this isn't in the correct forum, wasn't quite sure where it would fit. Confused | :confused:

Thanks in advance

He who laughs last is a bit on the slow side

Get thumbnail info from jpeg file

i-p-g-i7-Nov-06 0:06

i-p-g-i

7-Nov-06 0:06

Hello,
i have lage jpeg files. i want to preview (small) this files in an picbox.
i want not to read the files completely, i want to read the tumbnail info.
my jpeg includes thumbnal images...
but how?

thx ipgi

Re: Get thumbnail info from jpeg file

AB77717-Nov-06 1:17

AB7771

7-Nov-06 1:17

Do u want the Thumbnail image of jpeg file or only the info?

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Re: Get thumbnail info from jpeg file

i-p-g-i7-Nov-06 2:27

i-p-g-i

7-Nov-06 2:27

hello,
I want the Thumbnail image of jpeg...

Re: Get thumbnail info from jpeg file

Christian Graus7-Nov-06 9:13

Christian Graus

7-Nov-06 9:13

You have a smaller version of the image embedded inside the jpeg as metadata ? Reading metadata from images is supported, I've seen samples that do it.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

create excel

fmardani7-Nov-06 0:05

fmardani

7-Nov-06 0:05

Hi,

I have added a reference to Microsoft Excel 11 and it shows as Excel under references.
I believe I should now use "using Excel".
But Excel does not get picked up by Intellisense.
So what I have ended up doing is as follows:
Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.ApplicationClass();

I basically should be able to abreviate the above line to:
Excel.Application excelApp = new Excel.ApplicationClass();

Thanks

Re: create excel

Pete O'Hanlon7-Nov-06 4:59

Pete O'Hanlon

7-Nov-06 4:59

Errm - that should be using Microsoft.Office.Interop; I think.

Arthur Dent - "That would explain it. All my life I've had this strange feeling that there's something big and sinister going on in the world."
Slartibartfast - "No. That's perfectly normal paranoia. Everybody in the universe gets that."

Deja View - the feeling that you've seen this post before.

Re: create excel

reviashko8-Nov-06 2:14

reviashko

8-Nov-06 2:14

Try Next Code:
Excel._Application m_app = null;
Excel.Workbook m_workBook = null;
Excell.Worksheet m_workSheet = null;

m_app = new Excel.ApplicationClass();
m_app.Visible = false;
m_app.UserControl = true;
m_workBook = m_app.Workbooks.Open(filename, false, false, Type.Missing......Type.Missing);
m_workSheet = m_app.Worksheets[shet] as Excel.WorkSheet;
//************************
m_workSheet.Cells[x,y] = "Yes";
//************************
m_workBook.Close(false,"", Type.Missing);
m_app.Quit();
m_workBook = null;
m_workSheet = null;
m_app = null;
GC.Collect();

devers@inbox.ru

Graphical Presentation

Rajesh Khubchandani6-Nov-06 23:59

Rajesh Khubchandani

6-Nov-06 23:59

hi,

Please let me know if anybody has idea about showing the graphical representation similar to performance graph available with Task Manager which show the graphical representation of cpu usage.

i wanted to implement the similar functinality into the .Net (winforms) application.

Please help me.

Regards,
Rajesh Khubchandani

problem assigning user controls to a panel

quiteSmart6-Nov-06 23:03

quiteSmart

6-Nov-06 23:03

hi,

in my application i need to develop a program that has its visual design some how like the outlook. it is compsed of two panels. one on the left that contains the buttons and the other is empty. when each button is clicked different forms should appear in panel2. To do that, I created diffrent userControls that i designed to work like the forms i need. When clicking on any button for the first time, the user control is assigned to the panel2. but clicking on different button after that should assign another user control to the panel2; but that is not happening. i don't know why.

i used different methods to free the panel2 from the old usercontrol and assign the new one to it but nothing is working.

for example i used this method:

panel2 = new Panel();<br />
usercontrol2.Parent = panel2;<br />

if any body can help i will appreciate that

best regards

Jamil Abou Khalil

Re: problem assigning user controls to a panel

Martin#6-Nov-06 23:24

Martin#

6-Nov-06 23:24

Hello,

//Add a control to your panel
You have to work with the "Controls" property of the panel.
this.panel2.Controls.Add(usercontrol2);

//clear panel
this.panel2.Controls.Clear();

Hope that helps you.

All the best,

Martin

Convert.ToDateTime Problem

Support1236-Nov-06 22:36

Support123

6-Nov-06 22:36

Hi all,

Yesterday i had the problem when i tried to convert a string to DateTime

I wanted to do the following:

string _appDate=_CurrentSelectedDate.Date.ToString("yyyy/MM/dd");<br />
string _fromDateTime = _appDate+" "+startTime;<br />
string _endDateTime = _appDate+" "+endTime;<br />
<br />
FromTime = Convert.ToDateTime(_fromDateTime);<br />
ToTime = Convert.ToDateTime(_endDateTime);

Now in this example the value of _appDate is "2006/11/07"
the value of _startTime is "4:00 PM"
the value of _endTime is "5:00 PM"

That makes the value of _fromDateTime = "2006/11/07 4:00 PM"
and the value of _endDateTime = "2006/11/07 5:00 PM"
I checked and it is...

Now when i try to Convert.ToDateTime for the FromDate and the ToDate
The value of FromTime is 7/11/2006
and value of ToTime is 7/11/2006 Confused | :confused:

on the other computer the values are correct but not on mine...

The regional settings are the same...

Please help

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Re: Convert.ToDateTime Problem

_mubashir7-Nov-06 0:29

_mubashir

7-Nov-06 0:29

What exactly is the problem? Arent you getting the time values?

Mubashir

Every job is a self portrait of the person who did it.

Re: Convert.ToDateTime Problem

Support1237-Nov-06 0:41

Support123

7-Nov-06 0:41

Oh no sorry...

I only get the date back like this...
"11/7/2006"
I want it to work like it does on the other PC
"2006/07/11 4:00:00 PM"

It worked on my PC too but i haven't changed the regional settings, i haven't altered the code of this segment...only now to try and fix it.

I don't know... Cry | :((

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Re: Convert.ToDateTime Problem

Support1237-Nov-06 1:23

Support123

7-Nov-06 1:23

Hi,

This problem has a whole new twist....

Everywhere in my code where i use the Covert.ToDateTime i have the same problem... it doesn't show me the time any more...

only the date but not even in the yyyy/MM/dd format, now it is in the dd/MM/yyyy
format.

Do you think that if i built the installer and and installed it onto another computer that it would work... I mean there is nothing wrong with the code, it's just weird...

i checked the regional settings again => same as the other computer...

before i build the installer, and find a pc to install it on... do you think it would work correctly on another PC if it's acting weird on mine?

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Re: Convert.ToDateTime Problem

Support1237-Nov-06 2:59

Support123

7-Nov-06 2:59

Ha, it works....

there must be something wrong on my pc... some setting or something...

Thank you for your time...

I think i need to reinstall my PC. D'Oh! | :doh:

But, this at least will speed up my system a little... Smile | :)

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Re: Convert.ToDateTime Problem

lainoo7-Nov-06 13:40

lainoo

7-Nov-06 13:40

i have this question, but i use two datetimepicker later:
dt1 =DateTime .Parse(dateTimePicker11.Value.ToLongDateString()+" "+dateTimePicker12.Value.ToLongTimeString());
it is right.

Sorry ...

Image displaying on a form in treeview....a fileload error

samtam6-Nov-06 21:57

samtam

6-Nov-06 21:57

i am using a treeView control in which i want to display image against its every node. the images are placed in project directiory's \bin\release folder. now the tree is popupulated when the form is loaded i.e the statements of populating the tree are after calling
InitializeComponent();
in the constructor of new form. at first time when i come 2 this form (calling it against the NEXT button of a prevous form) then no problems occur and the images are loaded without any complication but when i go back to a previous form and come back to this form through same path and using same NEXT button then fileNotFound exeception occurs at this line

Image img = Image.FromFile("pic1.jpg");

but previously images were displayed successfully...!
i am facing same problem when i rightclick and create a contextMenu against a node. images are displayed against each optin of contextMenu successfully at first but when i click some option of contextMenu then work n then rightclick same node then the same exeception fileNotFound occurs(while populating ContextMenu) at same sort of lines...

further more if i am debugging the project then these fileNotFoundException occurs even for the first time when i populate the tree.but when i run the project no error comes for the first time and the images are loaded successfully....but only for first time..!

i canot understand where the problem lies??

May God help u solv ur problems as well,thx in advance!!

Re: Image displaying on a form in treeview....a fileload error

beatles16926-Nov-06 23:14

beatles1692

6-Nov-06 23:14

Hi I can't exactly tell you what is the problem but it seems that there's a problem in finidng the directory of images.If that's the problem ,you can use Application.ExecutablePath property to get the path then combine it with the file name (for example Path.Combine(Application.ExecutablePath,"image1.pic")

Regards

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