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Looping thru controls on a page

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Frans, Stephen

I'd like to loop thru all controls on a web form, but cannot find a
collection that I can enumerate thru (kind of like the old classic ASP "for
each x in Request.Forms" functionality).

Moreover, it would be nice to know the object type (TypeOf kind of
functionality to determine "user control" versus "web control" versus "html
control"). Once I knew the type of object, I could cast the object and
issue method calls on that object appropriate for that object.

Could someone point me in the right direction?

TIA,

Steve Frans
Impact Innovations Group

Reply to this message...

Brian Bilbro (VIP)

Page.Controls is a collection of all of the controls.

There are some GetType functions available and even reflection (probably =
simipler than that though) to figure out the object type.

HTHs,
Brian'

----- Original Message -----
From: "Frans, Stephen" <Click here to reveal e-mail address>
Sent: 11/6/2001 8:38:00 PM

I'd like to loop thru all controls on a web form, but cannot find a
collection that I can enumerate thru (kind of like the old classic ASP =
"for
each x in Request.Forms" functionality). =20
=20
Moreover, it would be nice to know the object type (TypeOf kind of
functionality to determine "user control" versus "web control" versus =
"html
control"). Once I knew the type of object, I could cast the object and
issue method calls on that object appropriate for that object.
=20
Could someone point me in the right direction?
=20
TIA,
=20
Steve Frans
Impact Innovations Group
=20
=20

Reply to this message...

Daryl Pietrocarlo

This isn't pretty code (and it is C#). A lot of copy and paste as I
needed it, but here is a function that will "rip" through any heiarchy
of controls if you pass the Enumerator using some recursion to pound
through the levels.

        void ripper(IEnumerator indexEnumerator )
        {
            while (indexEnumerator.MoveNext())
            {
                Debug.WriteLine("Control:" +
indexEnumerator.Current.ToString());
                Debug.WriteLine("Type:" +
indexEnumerator.Current.GetType().Name);

                if (
indexEnumerator.Current.GetType().Name =3D=3D "Label")=20
                {
                    Label l =3D
(Label)indexEnumerator.Current;
                    Debug.WriteLine("----------->
Label Text:" + l.Text);
                }
            =09
                if (
indexEnumerator.Current.GetType().Name =3D=3D "TextBox")=20
                {
                    TextBox l =3D
(TextBox)indexEnumerator.Current;
                    Debug.WriteLine("----------->
TextBox Text:" + l.Text);
                }

                if (
indexEnumerator.Current.GetType().Name =3D=3D "DataBoundLiteralControl") =

                {
                    DataBoundLiteralControl l =3D
(DataBoundLiteralControl)indexEnumerator.Current;
                    Debug.WriteLine("----------->
DataBoundLiteralControl Text:" + l.Text);
                }

                if (
indexEnumerator.Current.GetType().Name =3D=3D "LiteralControl" ||
indexEnumerator.Current.GetType().Name=3D=3D =
"ResourceBasedLiteralControl")=20
                {
                    LiteralControl l =3D
(LiteralControl)indexEnumerator.Current;
                    Debug.WriteLine("----------->
LiteralControl Text:" + l.Text);
                =09
                }                =09
            =09
                Debug.WriteLine("Assembly:" +
indexEnumerator.Current.GetType().Assembly);
                Control c =3D
(Control)indexEnumerator.Current;

                if (c.Controls.GetEnumerator() !=3D null)
                {
=09
ripper(c.Controls.GetEnumerator() );
                }
            }
        }

Call it like this:

    ripper(Page.Controls.GetEnumerator());

Remember if you have another control like a Datagrid, you can pass
MyDataGrid.Controls.GetEnumerator() just to go through the datagrid
etc.

Daryl Pietrocarlo
Vibrant Solutions
Click here to reveal e-mail address

-----Original Message-----
From: Brian Bilbro [mailto:Click here to reveal e-mail address]=20
Sent: Wednesday, November 07, 2001 11:52 PM
To: aspngcontrolsvb
Subject: [aspngcontrolsvb] RE: Looping thru controls on a page

Page.Controls is a collection of all of the controls.

There are some GetType functions available and even reflection (probably
simipler than that though) to figure out the object type.

HTHs,
Brian'

----- Original Message -----
From: "Frans, Stephen" <Click here to reveal e-mail address>
Sent: 11/6/2001 8:38:00 PM

I'd like to loop thru all controls on a web form, but cannot find a
collection that I can enumerate thru (kind of like the old classic ASP
"for each x in Request.Forms" functionality). =20
=20
Moreover, it would be nice to know the object type (TypeOf kind of
functionality to determine "user control" versus "web control" versus
"html control"). Once I knew the type of object, I could cast the
object and issue method calls on that object appropriate for that
object.
=20
Could someone point me in the right direction?
=20
TIA,
=20
Steve Frans
Impact Innovations Group
=20
=20

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Reply to this message...

Paul D. Murphy

FWIW, if you turn on tracing ASP.NET will lay out the control hierarchy
at the foot of every page.

Paul

[Original message clipped]

Reply to this message...

Rob Waggoner (VIP)

And a VB Example:

Public Class frmMain
Inherits System.Windows.Forms.Form
...

Dim ctlToWork As Control ' declare control type

...

' loop through control collection searching for panel types
For Each ctlToWork In Controls
Select Case ctlToWork.GetType.FullName
Case "System.Windows.Forms.Panel"
ctlToWork.Visible = False
End Select
Next

Rob Waggoner
Master Applications Craftsman
WAGGS
Web based Advanced Graphics and Graphing Solutions
http://www.waggs.net
"Applying Old world craftsmanship to New world technologies"

Reply to this message...

	System.Collections.IEnumerator
	System.Diagnostics.Debug
	System.Web.UI.DataBoundLiteralControl
	System.Web.UI.LiteralControl
	System.Web.UI.MobileControls.TextBox
	System.Web.UI.Page
	System.Web.UI.WebControls.TextBox
	System.Windows.Forms.Form
	System.Windows.Forms.Panel
	System.Windows.Forms.TextBox

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