C# ShowDialog inside of ShowDialog closing both on return

[NVergunst]

I have a main form, then this form spawns another form (Form A) as a form.showdialog(). That dialog box then has a button that spawns another form (Form B) through the form.showdialog(). All of this works fine.

Now when I press a button on Form B, and set the "this.DialogResult = DialogResult.Cancel", then close, it goes back to FormA, and Form B closes. Then Form A closes and returns to the main form. This is not what I am wanting.

I want Form A to stay open. It seems like the DialogResult is being sent back through all the forms... How can I prevent this?

[r035198x]

I have a main form, then this form spawns another form (Form A) as a form.showdialog(). That dialog box then has a button that spawns another form (Form B) through the form.showdialog(). All of this works fine.

Now when I press a button on Form B, and set the "this.DialogResult = DialogResult.Cancel", then close, it goes back to FormA, and Form B closes. Then Form A closes and returns to the main form. This is not what I am wanting.

I want Form A to stay open. It seems like the DialogResult is being sent back through all the forms... How can I prevent this?

Perhaps you are using Dialog boxes where you ought to be using normal forms ...

[wimpos]

I tried what you tried and I'm not having your issue.

what I did
Form1 with button to open Form2
Form2 with button to open Form3
Form3 with button to set diaglogresult to Cancel

If fire my app, Form1 opens, I press the button, Form2 opens, I press the button Form3 opens, I press the button Form3 closes. Form2 remains open.

Form1:

private void button1_Click(object sender, EventArgs e)
        {
            (new Form2()).ShowDialog();
        }

Form2:

private void button1_Click(object sender, EventArgs e)
        {
            (new Form3()).ShowDialog();
        }

Form3:

private void button1_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
        }

You must 've done someting wrong. Do you set a dialogResult on the second form?

Regards

[NVergunst]

No dialog result on the second form.

I have this button click handler on the Main Form:

        private void TSB_AddBrain_Click(object sender, EventArgs e)
        {
            if ((new BrainForm()).ShowDialog(this) == DialogResult.OK)
            {
                //Add it to the main list
 
            }
        }
 

and then on "BrainForm"

        private void BTN_SEARCHBRAIN_Click(object sender, EventArgs e)
        {
            (new AutoSearchBrains()).ShowDialog();
        }
 

and then on AutoSearchBrain Form (OK and Canel Buttons)

        #region Cancel Button Clicked
        private void BTN_CANCEL_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
            this.Close();
        }
        #endregion
 
        #region Save Button Clicked
        private void BTN_SAVE_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.OK;
            if (LISTBOX_AllBrains.SelectedItem != null)
            {
                SendAutoBrain(FoundBrains[LISTBOX_AllBrains.SelectedIndex]);
            }
            else
            {
                ErrorForm _tempError = new ErrorForm("Select a Fusion Brain", "Please Select a Fusion Brain Instance from the list");
                _tempError.ShowDialog();
                return;
            }
            this.Close();
        }
        #endregion
 

It must be a setting somewhere, because if I error it and make ErrorForm appear, I can close it no problem... But again if I close AutoSearch form, BrainForm closes too regardless of the DialogResult.

What sort of setting would cause a fall through like this? Would it have to do with the button's having the same name but on different forms? All cancel buttons are named "BTN_CANCEL" and all OK buttons are "BTN_SAVE". Perhaps the event handlers are using the button name as the event trigger and not its instance or something?

[NVergunst]

Ok, solution found:

The Ok was being passed down and I dont know why. But if after the .ShowDialog() I just have to put this.DialogResult = DialogResult.None, and it will fix it. This shouldnt happen in the first place, but this fixes it, so I am not too bothered.

[michaelp]

I had a very similar issue. I constructed a UserControl that would basically drive a whole form that you placed it into. When ever I would do a ShowDialog on it, it would appear then disappear. Really fast I might add. It was driving me up the wall until I ran across this thread. Good Job.

[Wojciech Jankun]

I had a very similar issue. I constructed a UserControl that would basically drive a whole form that you placed it into. When ever I would do a ShowDialog on it, it would appear then disappear. Really fast I might add. It was driving me up the wall until I ran across this thread. Good Job.

I did Aps that all widnows using same code. In more less half of them Described issue appears and I had to use this.DialogResult=DialogResult.None and in other half it was working OK without it.

I guess it's some serious bug in .NET