Cross form communication...

[hzgt9b]

Using VS2005, VB.NET, I have am developing a windows app that has a
login form. This login form can be called by several classes. When the
login form is able to verify that the supplied credentials are valid
then I want to pass an object (System.Net.Cre dential) back to the
calling/parent class. All the classes that call the login form have a
public property named "_oCredenti als" that could be used to store
validated credentials.

My problem is knowing what class opened/called the login form and
getting the code in the form to store the validated credentials back
in the correct parent...

Hope this makes sense. Your input appreciated.

FYI, here is how I am calling the form now (from any of the "parent"
classes)
'Gather domain credentials
Dim frmLogin As New frmDomainLogin
frmLogin.ShowDi alog(Me)

[Charlie Brown]

Re: Cross form communication.. .

On Oct 10, 9:56 am, hzgt9b <celof...@gmail .comwrote:

Using VS2005, VB.NET, I have am developing a windows app that has a
login form. This login form can be called by several classes. When the
login form is able to verify that the supplied credentials are valid
then I want to pass an object (System.Net.Cre dential) back to the
calling/parent class. All the classes that call the login form have a
public property named "_oCredenti als" that could be used to store
validated credentials.
>
My problem is knowing what class opened/called the login form and
getting the code in the form to store the validated credentials back
in the correct parent...
>
Hope this makes sense. Your input appreciated.
>
FYI, here is how I am calling the form now (from any of the "parent"
classes)
'Gather domain credentials
Dim frmLogin As New frmDomainLogin
frmLogin.ShowDi alog(Me)

You could create a interface for all your parent forms to implement.
Call it something like iCallTheLoginFo rm or whatever is appropriate.
Then in your login form you can reference the parent form by casting
it to your interface.

Public Interface iCallTheLoginFo rm
Public Property LoginCredential as System.Net.Cred ential
End Interface

Public Class MainForm
implements iCallTheLoginFo rm

Public Property MainForm_LoginC redential As System.Net.Cred ential
Implements iCallTheLoginFo rm.LoginCredent ial

.....

Public Class LoginForm

Private myParent as iCallTheLoginFo rm

Public Sub New(p as iCallTheLoginFo rm)
myParent = p
End Sub

.....


That should be a good start, I quick typed that one, so it might have
a typo...

[hzgt9b]

Re: Cross form communication.. .

You could create a interface for all your parent forms to implement.

Call it something like iCallTheLoginFo rm or whatever is appropriate.
Then in your login form you can reference the parent form by casting
it to your interface.
>
Public Interface iCallTheLoginFo rm
Public Property LoginCredential as System.Net.Cred ential
End Interface
>

Thanks for the quick response... unfortunately I am unable to declare
a property of type "System.Net.Cre dential" as the return type in the
interface (even after importing System.Net)...

[=?Utf-8?B?aXdkdTE1?=]

RE: Cross form communication.. .

what i usually do in this situation, is overload the ShowDialog function wiht
my own return type, then do the base form's showdialog then return the
info....ex

Public Overloads Function ShowDialog() As String

MyBase.ShowDial og()

Return String.Empty

End Function

and there ya go. hope this helps
--
-iwdu15

[hzgt9b]

Re: Cross form communication.. .

Thanks, I implemented an interface and then did the case back to the
form... works great.