Is there a good example of using multiple forms.....

[DaveyM69]

:thumbsup:

Dave

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Binging is like googling, it just feels dirtier. Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

[glennPattonPub]

Hi, Thanks for that it works one way Form1 to Form2, I am trying to get Form2 to Form1 (Don't ask Tower of Babel situation). Now I am trying the method for Form1 to Form2 reversed and running into problems. Very unpolitical correct give me Global variables back I promise not to abuse them !(like I did) Glenn

[AussieLew]

Sounds similar to what I wanted to do. Form2 needed to set a menuitem on Form1. this was done by creating the event in Form2 registering the handler in Form1. Form 2 also needed to know the status of some menuitems in Form1. This was done by creating the event in Form2 with and registering the handler in Form1. This handler sets one of the custom eventargs properties and returns them to Form2. It was a combination of Daves examples. I'm sure DaveyM69 will explain it more succintly! Thread of my question is Here may help.

[glennPattonPub]

Great

[DaveyM69]

Hi, sorry for the delay in getting back. I'm having a busy day at work X| It seems AussieLew has guided you through. If you need any more help feel free to post back and I will have a look tonight (UK) if you are stuck or unsure.

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier. Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

[glennPattonPub]

He has helped but I still need a little guidance as it all seems to be forward and not backward passing. Thanks Glenn

[DaveyM69]

glennPattonWork wrote:

all seems to be forward and not backward passing

No. Have a look at this exmple that does exactly what you want. Anything you don't understand, just ask!

// ThreeIntsEventArgs.cs
/* Arguments and delegate for FormChild.ThreeIntsEvent */

using System;

public delegate void ThreeIntsEventHandler(object sender, ThreeIntsEventArgs e);

public class ThreeIntsEventArgs : EventArgs
{
private int x;
private int y;
private int z;

public ThreeIntsEventArgs(int x, int y, int z)
{
    this.x = x;
    this.y = y;
    this.z = z;
}

public int X
{
    get { return x; }
}
public int Y
{
    get { return y; }
}
public int Z
{
    get { return z; }
}

}

// FormChild.cs
/* Click OK to raise event sending the three values */

using System.Drawing;
using System.Windows.Forms;

public partial class FormChild : Form
{
public event ThreeIntsEventHandler ThreeInts;

private NumericUpDown numericUpDownX;
private NumericUpDown numericUpDownY;
private NumericUpDown numericUpDownZ;
private Button buttonOK;

public FormChild()
{
    InitializeComponent();
    // numericUpDownX
    numericUpDownX = new NumericUpDown();
    numericUpDownX.Location = new Point(12, 12);
    // numericUpDownY
    numericUpDownY = new NumericUpDown();
    numericUpDownY.Location = new Point(12, 36);
    // numericUpDownZ
    numericUpDownZ = new NumericUpDown();
    numericUpDownZ.Location = new Point(12, 60);
    // buttonOK
    buttonOK = new Button();
    buttonOK.Text = "OK";
    buttonOK.Location = new Point(12, 84);
    buttonOK.Click += new System.EventHandler(buttonOK\_Click);
    // Add controls
    Controls.AddRange(new Control\[\] { numericUpDownX, numericUpDownY, numericUpDownZ, buttonOK });
    AcceptButton = buttonOK;
}

private void buttonOK\_Click(object sender, System.EventArgs e)
{
    OnThreeInts(new ThreeIntsEventArgs((int)numericUpDownX.Value, (int)numericUpDownY.Value, (int)numericUpDownZ.Value));
}
protected virtual void OnThreeInts(ThreeIntsEventArgs e)
{
    ThreeIntsEventHandler eh = ThreeInts;
    if (eh != null)
        eh(this, e);
}

}

// FormParent.cs
/* Click the Form tho open a new ch

[glennPattonPub]

Hi, I have had a fiddle it seems a little over compliated at the moment. I have a simpler method using the Panel component with three text boxe sand a button click to make the panel visible, once the variables are entered the panel is made invisible the values can be recorded. What the opinion of that? I have tried in a demo App does look too bad. Glenn

[DaveyM69]

If it works for you then cool :cool: I don't see how that helps you get values from one form to another though :confused: I'm planning another article that will be a bit more light hearted so more accessible on various OOP techniques/patterns including events/delegates (Observer Pattern). I'll post here when it's published, which will probably be a couple of weeks, as you may find it useful.

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier. Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

[DaveyM69]

So you (and others) can see how simple events really are to create, I have posted a simple tip here[^].

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier. Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)