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TreeView doesn't show last item

Hi all,

in my WinForm-Application i have a strange problem with the TreeView
Control.
As you can see in the samplecode below, i fill the TreeView by adding some
nodes with sub nodes. (The subnodes don't matter in the first place.)
After that, when i scroll totally to the bottom, the last item (the 9) rest
almost totally invisable. This problem disappears, when i open (and close)
one of the nodes. (The sample code uses subnodes only to demonstrate this.
The main problem is the same without the subnodes.)

Does anyone know, why this happens? Is there a solution/workaround to this
problem?

Here the sample code:

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows. Forms;
namespace TrewViewTest
{
public partial class Form1 : Form
{
private System.Windows. Forms.TreeView treeView1;
public Form1()
{
InitializeCompo nent();
}
protected override void OnLoad(EventArg s e)
{
base.OnLoad(e);
for (int i = 0; i < 10; i++)
{
treeView1.Nodes .Add(i.ToString ()).Nodes.Add(i .ToString());
}
}
[STAThread]
static void Main()
{
Application.Ena bleVisualStyles ();
Application.Set CompatibleTextR enderingDefault (false);
Application.Run (new Form1());
}
private void InitializeCompo nent()
{
this.treeView1 = new System.Windows. Forms.TreeView( );
this.SuspendLay out();
//
// treeView1
//
this.treeView1. Anchor =
((System.Window s.Forms.AnchorS tyles)((((Syste m.Windows.Forms .AnchorStyles.T op
| System.Windows. Forms.AnchorSty les.Bottom)
| System.Windows. Forms.AnchorSty les.Left)
| System.Windows. Forms.AnchorSty les.Right)));
this.treeView1. Location = new System.Drawing. Point(13, 13);
this.treeView1. Name = "treeView1" ;
this.treeView1. Size = new System.Drawing. Size(267, 120);
this.treeView1. TabIndex = 0;
//
// Form1
//
this.AutoScaleD imensions = new System.Drawing. SizeF(6F, 13F);
this.AutoScaleM ode = System.Windows. Forms.AutoScale Mode.Font;
this.ClientSize = new System.Drawing. Size(292, 266);
this.Controls.A dd(this.treeVie w1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayo ut(false);
}
}
}
Oct 12 '06 #1
6 3236
"Christof Nordiek" wrote:
>when i scroll totally to the bottom, the last item (the 9) rest
almost totally invisable.
What do u mean? You code works fine without hiding anything.

--
WBR,
Michael Nemtsev :: blog: http://spaces.live.com/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche

Oct 12 '06 #2
"Michael Nemtsev" <ne*****@msn.co mschrieb im Newsbeitrag
news:FC******** *************** ***********@mic rosoft.com...
>"Christof Nordiek" wrote:
>>when i scroll totally to the bottom, the last item (the 9) rest
almost totally invisable.

What do u mean? You code works fine without hiding anything.

--
WBR,
Michael Nemtsev :: blog: http://spaces.live.com/laflour

"At times one remains faithful to a cause only because its opponents do
not
cease to be insipid." (c) Friedrich Nietzsche
Hi Micheal,

on futher investigation i found out, this depends on the visual styles. It
doesn't happen with Windows classic style but f.e. with Windows XP style it
does. Do be exact, it depends on the style, when the form opend resp. was
filled.

Also i should have mentioned, that i used VS 2005. Though i suppose you also
used since the code doesn't compile with VS 2003.

Below i repost the code that is compilable with both. On VS2003 it works
fine on VS2005 it shows the mentioned phenomenon (dependung on Visual
Styles).

using System;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows. Forms;
namespace TrewViewTest
{
public class Form1 : Form
{
private System.Windows. Forms.TreeView treeView1;
public Form1()
{
InitializeCompo nent();
}
protected override void OnLoad(EventArg s e)
{
base.OnLoad(e);
for (int i = 0; i < 10; i++)
{
treeView1.Nodes .Add(i.ToString ()).Nodes.Add(i .ToString());
}
}
[STAThread]
static void Main()
{
Application.Ena bleVisualStyles ();
Application.Run (new Form1());
}
private void InitializeCompo nent()
{
this.treeView1 = new System.Windows. Forms.TreeView( );
this.SuspendLay out();
//
// treeView1
//
this.treeView1. Anchor =
((System.Window s.Forms.AnchorS tyles)((((Syste m.Windows.Forms .AnchorStyles.T op
| System.Windows. Forms.AnchorSty les.Bottom)
| System.Windows. Forms.AnchorSty les.Left)
| System.Windows. Forms.AnchorSty les.Right)));
this.treeView1. Location = new System.Drawing. Point(13, 13);
this.treeView1. Name = "treeView1" ;
this.treeView1. Size = new System.Drawing. Size(267, 120);
this.treeView1. TabIndex = 0;
//
// Form1
//
this.ClientSize = new System.Drawing. Size(292, 266);
this.Controls.A dd(this.treeVie w1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayo ut(false);
}
}
}


Oct 12 '06 #3
for (int i = 0; i < 10; i++)

If you mean last one is not 10 it is exactly correct because 10 cannot be
lesser than 10. If you want to should 10 using <= 10

chanmm

"Christof Nordiek" <cn@nospam.dewr ote in message
news:e%******** ********@TK2MSF TNGP05.phx.gbl. ..
Hi all,

in my WinForm-Application i have a strange problem with the TreeView
Control.
As you can see in the samplecode below, i fill the TreeView by adding some
nodes with sub nodes. (The subnodes don't matter in the first place.)
After that, when i scroll totally to the bottom, the last item (the 9)
rest almost totally invisable. This problem disappears, when i open (and
close) one of the nodes. (The sample code uses subnodes only to
demonstrate this. The main problem is the same without the subnodes.)

Does anyone know, why this happens? Is there a solution/workaround to this
problem?

Here the sample code:

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows. Forms;
namespace TrewViewTest
{
public partial class Form1 : Form
{
private System.Windows. Forms.TreeView treeView1;
public Form1()
{
InitializeCompo nent();
}
protected override void OnLoad(EventArg s e)
{
base.OnLoad(e);
for (int i = 0; i < 10; i++)
{
treeView1.Nodes .Add(i.ToString ()).Nodes.Add(i .ToString());
}
}
[STAThread]
static void Main()
{
Application.Ena bleVisualStyles ();
Application.Set CompatibleTextR enderingDefault (false);
Application.Run (new Form1());
}
private void InitializeCompo nent()
{
this.treeView1 = new System.Windows. Forms.TreeView( );
this.SuspendLay out();
//
// treeView1
//
this.treeView1. Anchor =
((System.Window s.Forms.AnchorS tyles)((((Syste m.Windows.Forms .AnchorStyles.T op
| System.Windows. Forms.AnchorSty les.Bottom)
| System.Windows. Forms.AnchorSty les.Left)
| System.Windows. Forms.AnchorSty les.Right)));
this.treeView1. Location = new System.Drawing. Point(13, 13);
this.treeView1. Name = "treeView1" ;
this.treeView1. Size = new System.Drawing. Size(267, 120);
this.treeView1. TabIndex = 0;
//
// Form1
//
this.AutoScaleD imensions = new System.Drawing. SizeF(6F, 13F);
this.AutoScaleM ode = System.Windows. Forms.AutoScale Mode.Font;
this.ClientSize = new System.Drawing. Size(292, 266);
this.Controls.A dd(this.treeVie w1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayo ut(false);
}
}
}


Oct 12 '06 #4
No i'm not speaking about the 10.
If you read my post well you will see that i'm talking about the 9.
The phenomenon prescribed is dependent an from the visual styles (look in my
response to Michael Nemtsev)
"chanmm" <ch*****@hotmai l.comschrieb im Newsbeitrag
news:OX******** ******@TK2MSFTN GP02.phx.gbl...
for (int i = 0; i < 10; i++)

If you mean last one is not 10 it is exactly correct because 10 cannot be
lesser than 10. If you want to should 10 using <= 10

chanmm

"Christof Nordiek" <cn@nospam.dewr ote in message
news:e%******** ********@TK2MSF TNGP05.phx.gbl. ..
>Hi all,

in my WinForm-Application i have a strange problem with the TreeView
Control.
As you can see in the samplecode below, i fill the TreeView by adding
some nodes with sub nodes. (The subnodes don't matter in the first
place.)
After that, when i scroll totally to the bottom, the last item (the 9)
rest almost totally invisable. This problem disappears, when i open (and
close) one of the nodes. (The sample code uses subnodes only to
demonstrate this. The main problem is the same without the subnodes.)

Does anyone know, why this happens? Is there a solution/workaround to
this problem?

Here the sample code:

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows. Forms;
namespace TrewViewTest
{
public partial class Form1 : Form
{
private System.Windows. Forms.TreeView treeView1;
public Form1()
{
InitializeComp onent();
}
protected override void OnLoad(EventArg s e)
{
base.OnLoad(e) ;
for (int i = 0; i < 10; i++)
{
treeView1.Node s.Add(i.ToStrin g()).Nodes.Add( i.ToString());
}
}
[STAThread]
static void Main()
{
Application.En ableVisualStyle s();
Application.Se tCompatibleText RenderingDefaul t(false);
Application.Ru n(new Form1());
}
private void InitializeCompo nent()
{
this.treeVie w1 = new System.Windows. Forms.TreeView( );
this.SuspendLa yout();
//
// treeView1
//
this.treeView1 .Anchor =
((System.Windo ws.Forms.Anchor Styles)((((Syst em.Windows.Form s.AnchorStyles. Top
| System.Windows. Forms.AnchorSty les.Bottom)
| System.Windows. Forms.AnchorSty les.Left)
| System.Windows. Forms.AnchorSty les.Right)));
this.treeView1 .Location = new System.Drawing. Point(13, 13);
this.treeView1 .Name = "treeView1" ;
this.treeView1 .Size = new System.Drawing. Size(267, 120);
this.treeView1 .TabIndex = 0;
//
// Form1
//
this.AutoScale Dimensions = new System.Drawing. SizeF(6F, 13F);
this.AutoScale Mode = System.Windows. Forms.AutoScale Mode.Font;
this.ClientSiz e = new System.Drawing. Size(292, 266);
this.Controls. Add(this.treeVi ew1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLay out(false);
}
}
}



Oct 12 '06 #5
I've solved this putting BeginUpdate & EndUpdate around the population
code:

treeView1.Begin Update();
for (int i = 0; i < 10; i++)
{
treeView1.Nodes .Add(i.ToString ()).Nodes.Add(i .ToString());
}
treeView1.EndUp date();

Got the idea from here:
http://forums.microsoft.com/MSDN/Sho...48930&SiteID=1

Russ

Christof Nordiek wrote:
Hi all,

in my WinForm-Application i have a strange problem with the TreeView
Control.
As you can see in the samplecode below, i fill the TreeView by adding some
nodes with sub nodes. (The subnodes don't matter in the first place.)
After that, when i scroll totally to the bottom, the last item (the 9) rest
almost totally invisable. This problem disappears, when i open (and close)
one of the nodes. (The sample code uses subnodes only to demonstrate this.
The main problem is the same without the subnodes.)

Does anyone know, why this happens? Is there a solution/workaround to this
problem?

Here the sample code:

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows. Forms;
namespace TrewViewTest
{
public partial class Form1 : Form
{
private System.Windows. Forms.TreeView treeView1;
public Form1()
{
InitializeCompo nent();
}
protected override void OnLoad(EventArg s e)
{
base.OnLoad(e);
for (int i = 0; i < 10; i++)
{
treeView1.Nodes .Add(i.ToString ()).Nodes.Add(i .ToString());
}
}
[STAThread]
static void Main()
{
Application.Ena bleVisualStyles ();
Application.Set CompatibleTextR enderingDefault (false);
Application.Run (new Form1());
}
private void InitializeCompo nent()
{
this.treeView1 = new System.Windows. Forms.TreeView( );
this.SuspendLay out();
//
// treeView1
//
this.treeView1. Anchor =
((System.Window s.Forms.AnchorS tyles)((((Syste m.Windows.Forms .AnchorStyles.T op
| System.Windows. Forms.AnchorSty les.Bottom)
| System.Windows. Forms.AnchorSty les.Left)
| System.Windows. Forms.AnchorSty les.Right)));
this.treeView1. Location = new System.Drawing. Point(13, 13);
this.treeView1. Name = "treeView1" ;
this.treeView1. Size = new System.Drawing. Size(267, 120);
this.treeView1. TabIndex = 0;
//
// Form1
//
this.AutoScaleD imensions = new System.Drawing. SizeF(6F, 13F);
this.AutoScaleM ode = System.Windows. Forms.AutoScale Mode.Font;
this.ClientSize = new System.Drawing. Size(292, 266);
this.Controls.A dd(this.treeVie w1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayo ut(false);
}
}
}
Oct 13 '06 #6
Hi russ,

thanks, that works!!
I suppose, they should be could anyway (though only for performance
reasens).

"russ" <ru************ *****@gmail.com schrieb im Newsbeitrag
news:11******** **************@ f16g2000cwb.goo glegroups.com.. .
I've solved this putting BeginUpdate & EndUpdate around the population
code:

treeView1.Begin Update();
for (int i = 0; i < 10; i++)
{
treeView1.Nodes .Add(i.ToString ()).Nodes.Add(i .ToString());
}
treeView1.EndUp date();

Got the idea from here:
http://forums.microsoft.com/MSDN/Sho...48930&SiteID=1

Russ

Christof Nordiek wrote:
>Hi all,

in my WinForm-Application i have a strange problem with the TreeView
Control.
As you can see in the samplecode below, i fill the TreeView by adding
some
nodes with sub nodes. (The subnodes don't matter in the first place.)
After that, when i scroll totally to the bottom, the last item (the 9)
rest
almost totally invisable. This problem disappears, when i open (and
close)
one of the nodes. (The sample code uses subnodes only to demonstrate
this.
The main problem is the same without the subnodes.)

Does anyone know, why this happens? Is there a solution/workaround to
this
problem?

Here the sample code:

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows. Forms;
namespace TrewViewTest
{
public partial class Form1 : Form
{
private System.Windows. Forms.TreeView treeView1;
public Form1()
{
InitializeComp onent();
}
protected override void OnLoad(EventArg s e)
{
base.OnLoad(e) ;
for (int i = 0; i < 10; i++)
{
treeView1.Node s.Add(i.ToStrin g()).Nodes.Add( i.ToString());
}
}
[STAThread]
static void Main()
{
Application.En ableVisualStyle s();
Application.Se tCompatibleText RenderingDefaul t(false);
Application.Ru n(new Form1());
}
private void InitializeCompo nent()
{
this.treeVie w1 = new System.Windows. Forms.TreeView( );
this.SuspendLa yout();
//
// treeView1
//
this.treeView1 .Anchor =
((System.Windo ws.Forms.Anchor Styles)((((Syst em.Windows.Form s.AnchorStyles. Top
| System.Windows. Forms.AnchorSty les.Bottom)
| System.Windows. Forms.AnchorSty les.Left)
| System.Windows. Forms.AnchorSty les.Right)));
this.treeView1 .Location = new System.Drawing. Point(13, 13);
this.treeView1 .Name = "treeView1" ;
this.treeView1 .Size = new System.Drawing. Size(267, 120);
this.treeView1 .TabIndex = 0;
//
// Form1
//
this.AutoScale Dimensions = new System.Drawing. SizeF(6F, 13F);
this.AutoScale Mode = System.Windows. Forms.AutoScale Mode.Font;
this.ClientSiz e = new System.Drawing. Size(292, 266);
this.Controls. Add(this.treeVi ew1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLay out(false);
}
}
}

Oct 13 '06 #7

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