Passing data from a form???

[richiemac]

Hi guys, I've got a form that has a number of textboxes. When a button is clicked I want the data in the boxes to be sent to the class that opened the form. How do I go about doing this? In myClass I call the form using myForm.Show (); This opens the form but how then do I get the data from it? It seems to want an instance of the calling class in the myForm, but I can't do this.:confused: Hope that makes sense.

[Le centriste]

You could expose some properties that the calling class will get when the form is closed. This may be done in numerous ways, one would be to catch the Form.Closed event (the calling class catches the one raised by the called form).private void OnMyFormClosed(object sender, EventArgs cea) { MyForm myForm = (MyForm)sender; string textBox1content = myForm.TextBox1Content; //... You get the idea. }

------------------ As I suggested, there are numerous other ways, like opening the form in modal mode and just wait for the ShowDialog() method to return, but still using properties. Also, you could use a custom event with a EventArgs-derived class containing the data of interest. -------- "I say no to drugs, but they don't listen." - Marilyn Manson -- modified at 12:40 Tuesday 28th February, 2006

[richiemac]

I've used the ShowDialog method with properties and it works fine. Knew it would be fairly straight forward - just not for me. :rolleyes:

[Le centriste]

:-> -------- "I say no to drugs, but they don't listen." - Marilyn Manson

[Robin Panther]

If you want to send some data to another object - you have to have reference to this object. In your case this means that your myForm should have reference to base form. something like this: call the form using myForm.Show(this) or set myForm.Owner = this just befor calling. Then, on button clicks, you could do something like this: ((OwnerForm)Owner).OkButtonIsClicked(); You could get values of textboxes of myForm if their modifiers are internal or public, but yYou could do it only if OwnerForm has reference to myForm, if not - you can invoke not OkButonIsClicked(), but OkButtonIsClicked(textBox1.Text, textBox2.Text, etc); ____________________________________________ Robin Panther http://www.robinland.com

[Le centriste]

I would not recommend this approach. This design is known as "tight coupling" or "re-coupling", and is an anti-pattern[^]. -------- "I say no to drugs, but they don't listen." - Marilyn Manson

[Lyle M]

Could you expound on your explaination a little. Is the OnMyFormClosed() function located in the parent form? How do you set an event to trigger when the child closes? Thanks Lyle

[Le centriste]

Lyle M wrote:

Is the OnMyFormClosed() function located in the parent form?

Yes

Lyle M wrote:

How do you set an event to trigger when the child closes?

The event is automatically triggered when MyForm closes. To subscribe to it, the parent form needs to do the following, before calling Form.Show(). myForm.Closed += new EventHandler(this.OnMyFormClosed); -------- "I say no to drugs, but they don't listen." - Marilyn Manson