Multiple Form Problem.

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I am working on multiple forms. I have a textBox, and when the user click on the textBox a new form is shown (which is actually my own developed on-screen keyboard). I want to type characters on the TextBox using my own on-screen keyboard. Right now, when the new form is displayed, the textBox becomes disabled. However, I'm using non-modal forms.

Posted 13-Mar-15 23:50pm

Member 11485559

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Member 11428137 14-Mar-15 6:01am

How are you opening the new form? Can you show the code used to open it.

Member 11485559 14-Mar-15 6:07am

private void textBox1_Click(object sender, EventArgs e)
{
subForm myNewForm = new subForm();
myNewForm.Show();
}
}

I want my keyboard to print characters in the TextBox just like it is printing in Notepad.

Member 11428137 14-Mar-15 6:10am

Ok, and how does the sub form try to type to the textbox?

Member 11485559 14-Mar-15 6:12am

That's where problem lies, I don't know any method to process inputs from child form to parent.

Member 11428137 14-Mar-15 6:17am

In that case I suggest having a good read of OriginalGriffs linked article. It covers what you want to do quite nicely.

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OriginalGriff · Accepted Answer · 2015-03-14T00:07:00

Solution 2

If you are using myNewForm.ShowDialog() to display the form, then it will indeed disable the "parent" form - because ShowDialog opens a modal form. Use myNewForm.Show() instead, and it won't.

I would suggest that you also want to handle the new form FormClosing event in the parent form to prevent multiple copies being opened, and if you want the "keys" processed immediately, you should look at providing events from your keyboard form which the parent can handle and deal with appropriately. It's not difficult, see here: Transferring information between two forms, Part 2: Child to Parent[^]

Posted 14-Mar-15 0:07am

OriginalGriff

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Member 11485559 14-Mar-15 6:14am

Thank you, I'm reading the article and would share the results soon.

Member 11485559 14-Mar-15 6:40am

Sir, I couldn't understand how tbData is used in both parent and child. I have a textbox in parent, and in child I'm just pressing a key. Like, If I press "Q", then this Q is transferred to the parent and parent's Textbox then adds a "Q".

OriginalGriff 14-Mar-15 6:56am

When you "detect" the keypress in the child, you work out the key value and raise an ever which the parent handles. It retrieves the keycode from the child, and passes that to the textbox. (I'd probably use a custom EventArgs to contain the code, to make suer they stay in order and none are lost if he types quickly).

The one thing you don't do is try to access the parent textbox from the child: that locks the child form to only ever working with one control on one form. Let the parent sort out what it wants to do with the input - that way you can use teh same child for multiple forms later on.

Make sense?

Member 11485559 14-Mar-15 7:02am

Thank you so much for all your help. I am just being able to transfer characters from on-screen keyboard to the text.

Next step is to complete all the functionality of the keyboard and transfer alphabets to parent form. Thank you

OriginalGriff 14-Mar-15 7:05am

You're welcome!

Member 11485559 14-Mar-15 11:19am

Alright, I'm done with this particular problem. I have a web browser, in which I enabled the keyboard only when the user press address bar. How would I show the keyboard for "websites text Boxes" like, facebook login address.