Can't open a Modal (showdialog) form

[elmbrook]

I am unable to open a child form as a modal form.

Here is my scenario

I have a MainForm which is a toplevel form.
Inside the MainForm I have a Toolbar Form which is a child.
From the Toolbar Form I call another child form.
From that child form I need to call myModalForm.

I have tried:

myModalForm myform = new myModalForm ();
myform.TopLevel = true;
myform.MdiParen t = this.mdiparent;
myform.ShowDial og();

Result: 'Form that is not a top-level form cannot be displayed as a modal dialog box. Remove the form from any parent form before calling showDialog.'

So I thought I would close the existing form first and then call the modal form

this.close();
myModalForm myform = new myModalForm ();
myform.TopLevel = true;
myform.ShowDial og();

Result: IT works...however , it is not inside the top level form.

So I thought I would open an instance of the MainForm and set that as the MDIParent

this.Close(); //Close Current Form
MainForm topform = new MainForm(); // Create new instance of MainForm
myModalForm myform = new myModalForm ();
topform.TopLeve l = true;
myform.MdiParen t = topform;
myform.ShowDial og();

Result: 'Form that is not a top-level form cannot be displayed as a modal dialog box. Remove the form from any parent form before calling showDialog.'

Can anyone help me get a modal form within my toplevel MainForm?

Thanks

[ThatThatGuy]

You cannot access a the parent form without closing the modal form...

it needs to be closed first...

although you should never use modal forms in mdi application,... . it should always be modaless...

Modal forms should only be for dialog forms

[elmbrook]

I think you may have mis-read the question.
I would like to open a modal form (dialog form) within my top level form.

They must fill out the information on my modal form first before they can continue.

Does that make sense?

[elmbrook]

I have found a work around but it is not pretty.

What I have done is open the modal form from the MainForm. I have to call this method from my Child form. This works however, for every modal form in my application, I have to setup a new entry in my MainForm.

public void Open_Modal_Form (string formname)
{
switch (formname)
{

case "myModalFor m":
myModalForm myform = new myModalForm ();
myform.ShowDial og(this);
break;
}
}