Help with coding a event handler

I know this topic has been covered several times however its still unclear to me.

I am creating Windows Forms Application believe to be called a singleton program design.
This is using a main form with differents options for the user to select.
These options in turn all have their corresponding forms with unique functions attached.
When the main form executes and the user select an option, the option form is then hidden
away from the user (as oppose to close) until its selected again. Note.. ITS NOT CLOSED.

I have a form with a richtext box and after checking contents validity, I want to send
that data to another form thats got a listview box... basically updating the listview box
on the other form.

All of the examples I have seen creates new instances of forms which is not ideal in my case

My question is:- how do I get data/information from one form to another form.

I tried creating a custom made event handler but have hit a buffer/brickwall

This is what I have got so far....

public delegate void EventDelegate(Object sender, EventArgs e);

public event EventDelegate MessageForListView;

if (status == 0){
       value = value.ToLower();
       using (StreamWriter sw = File.AppendText(path)){
       sw.WriteLine(value + " " + datestamp);
       MessageBox.Show(value.ToString() + " is now registered....... ");

//message event required here to pass back value and datestamp to the form holding the ListViewBox

MessageForListViewEvent += NewDriverForm_MessageForListViewEvent;

      ReSetInput();
     }
   }

private void NewDriverForm_MessageForListViewEvent(object sender, EventArgs e){

// how do I write the data into the ListViewBox or call the reload procedure again.

}

thanks in advance

4 Replies

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Amit Gupta7y ago
Hey

Please find the attached sample for your requirement.
Ronald Grossett7y ago
Sorry Amit.. not sure which AccessModifier I need to set to public, furthermore, I was under the impression that Event Handlers was the perferred way for form inter communication..
Please elaborate more on your solution(s)
Thanks... Basic User
Amit Gupta7y ago
However, creation of event handler is wrong. Have you looked to the earler post's attachment, thats somewhat is like yours.
Amit Gupta7y ago
There are severatl ways to access the data to another form. 1. Set the AccessModifier to public and access it. OR 2. Declare second form's instance as global variable and create a get/set property to 2nd form and pass the data to the 2nd form's variable.