Re: How to make data from one form available to another - C# Discussion Boards

Re: How to make data from one form available to another

6-Jul-07 0:38

hi,
I have two forms Form1 and Form2. On Form1 i have a data grid that has a data in 3 columns, now on button click i want to send data of first row to Form2 that has 3 textboxes, so that the text boxes have the corresponding values (for eg Name,City,Country). I tried to make 3 public properties and assign the values of the grid cells to them and then tried to call these properties on FOrm2 to populate the text boxes, but they show up empty, because to be able to access Form1's property, i need to declare and initialise Form1's instance, so each time a new instance is created, the property would contain null values.Please help

rah_sin6-Jul-07 0:47

rah_sin

6-Jul-07 0:47

u can pass the instance of first form to second form in second forms constructor.

rahul

Re: How to make data from one form available to another

Christian Graus6-Jul-07 0:55

Re: How to make data from one form available to another

6-Jul-07 0:55

Except that would be nasty...

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

I.explore.code6-Jul-07 1:01

Re: How to make data from one form available to another

6-Jul-07 1:01

public partial class Form2 : Form<br />
    {<br />
        Form1 frm1;<br />
        public Form2()<br />
        {<br />
            InitializeComponent();<br />
            frm1 = new Form1();<br />
        }<br />

Is that what u wan to say ?

Christian Graus6-Jul-07 1:35

Re: How to make data from one form available to another

6-Jul-07 1:35

No, that is an utter disaster, it cannot work. The Form1 inside form2 is completely irrelevant to the Form1 that you are working with.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Christian Graus6-Jul-07 0:56

Re: How to make data from one form available to another

6-Jul-07 0:56

I assume they are not called that....

If you want to pass data from form1 to form2, pass it through the constructor or through properties, if you want to pass data from the child to the parent, set up delegate methods to do so. Whatever you do, set up the smallest scope properties you can, i.e. set up a string property to set the text of a textbox, rather than making the textbox itself public.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

I.explore.code6-Jul-07 1:05

Re: How to make data from one form available to another

6-Jul-07 1:05

Hi Chris....thts what I precisely did....i created 3 public properties on Form1 each to capture cell values of the grid data and then in Form2 I created an instance of Form1 and using it i accessed those properties, but since each time the Form2 loads, it would create a new instance which wud be null, the text boxes are empty. Now, do we have a way to modify this to work

Christian Graus6-Jul-07 1:36

Re: How to make data from one form available to another

6-Jul-07 1:36

Yep - that's the issue. A new instance of Form1 has nothing to do with the instance in use in your program. I recommend reading a book on OO.

gladiatron wrote:
Now, do we have a way to modify this to work

Going from form2 to form1, you should use delegates.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

I.explore.code6-Jul-07 1:13

Re: How to make data from one form available to another

6-Jul-07 1:13

Hey Chris and Rahul.....thannx a lot ..constructor technique worked .....but is there any other way to do it?

Giorgi Dalakishvili6-Jul-07 1:11

Giorgi Dalakishvili

6-Jul-07 1:11

This will help you http://www.codeproject.com/dotnet/passingvaluesbetweenforms.asp[^]

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Re: How to make data from one form available to another

Chintan.Desai6-Jul-07 2:26

Chintan.Desai

6-Jul-07 2:26

obviously when you create any object instance, it allocate new empty memory. So just do one thing in form1 click event.create form2 instance, after then assign grid cell in form1 to form2 public property.Now in form2 load event assign that property to each textbox of form2.Now show form2. Rose | [Rose]

Regards
Chintan
www.visharadsoft.com
(Nothing is so purify as KNOWLEDGE)

Multiple Instance Closure

ramdil6-Jul-07 0:25

ramdil

6-Jul-07 0:25

Hi.
I have written a code which will prevent multiple instance of a exe to be executed.the code which i wrote is as below
if (processes.Length != 1)
Application.Run(new FormCacheProcessor());
else
MessageBox.Show("Already An Instance of CacheManager Application is Running");

but now i want instead of this message box being poped up, i want already running instance of exe to come to the foreground..i have used SetForegroundWindow but its not working..

Can any pls help me in working it..

Thanks in advance.

Regards
DilipRam

Re: Multiple Instance Closure

Pete O'Hanlon6-Jul-07 1:06

Pete O'Hanlon

6-Jul-07 1:06

Rather than rolling your own code to manage this, why not use what .Net 2 provides for you? This[^] set of pages tells you all you need to know on how to do it.

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Re: Multiple Instance Closure

ramdil6-Jul-07 8:52

ramdil

6-Jul-07 8:52

Hi thanks for the reply..i went through the page you provided but i got confused...have any one work on that specific problem.i just want to activate the already running exe to foreground...

thanks

Regards
DilipRam

C# how to get mouseover pos on a picture

mercenary015-Jul-07 23:40

mercenary01

5-Jul-07 23:40

How do I do a mouse over on a GIF picture? I want to get X and Y position on the gif I display over the form. Currently I can only see the mouseover pos on the form surface only not on the picture how do I do the opposite?

Thanks

Samuel

Martin#5-Jul-07 23:46

Martin#

5-Jul-07 23:46

Hello,

Is this picture in a pictureBox?
If yes, you would have to handle MouseMove there!

All the best,

Martin

mercenary015-Jul-07 23:50

mercenary01

5-Jul-07 23:50

I am sorry, I dont know how to handle mousemove there? and yes its in a picture box. Do you have an example of how I can do this??

Thanks

Samuel

Martin#5-Jul-07 23:52

Martin#

5-Jul-07 23:52

Hello,

this.pictureBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseMove);
private void pictureBox1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
	string actmouseposition= "X: " + e.X + "; Y: " + e.Y;
}

Hope it helps!

All the best,

Martin

mercenary016-Jul-07 0:07

mercenary01

6-Jul-07 0:07

Yes! it works like a charm! Thanks lots!

Thanks Smile | :)

Samuel

Martin#6-Jul-07 1:45

Martin#

6-Jul-07 1:45

You are wellcome!

app.exe..config and application settings

rah_sin5-Jul-07 23:48

rah_sin

5-Jul-07 23:48

i think u should display gif image in some container like picture box
and then u can get the coordinates of picture displayed.

rahul

peterchen5-Jul-07 23:28

peterchen

5-Jul-07 23:28

Somethign that isn't clear from the documentation I can find:

"Application Settings", as supported by the .NET framework and IDE, are stored in {app}.exe.config in the executable folder.

Doesn't that mean they can be written only during setup (or by administrators)? I.e. they are off limits for settings the application wants to remember for later, if the application ever wantsto run under a limited account.

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Re: app.exe..config and application settings

Christian Graus5-Jul-07 23:34