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Is it possible to add more than one panel in same location

i'm using telerik control.
So i want to ask,
In winforms application ,Is it possible to add more than one panel in same location and display one at a time just like show/hide property.

Make sure you have placed all panel control in same container or form. then you can use Visible property to show and hide panel. BringFront and SendToBack function will be used to bring panel on top or send it to back. If you have placed any panel in another panel then that will be disappeared when you Hide parent panel. So, Make sure all panels' parent control must be same. To determine the parent control simply select that panel and press escape key to select their parent.
private void LoadPanels()
{
panel1.Location = new Point(10,10);
panel2.Location = new Point(10,10);
panel3.Location = new Point(10,10);
panel4.Location = new Point(10,10);
panel5.Location = new Point(10,10);
VisiblePanel("panel1");
}
private void VisiblePanel(string panelName)
{
string[] panels = new string[]{"panel1","panel2","panel3","panel4","panel5"};
for (int i=0;i<panels.Length;i++)
this.Controls[panels[i]].Visible = (panels[i] == panelName);
this.Controls[panelName].BringToFront(); //Not required you can remove this line.
}

Here's a slightly different approach you might want to consider...
Are you wanting to be able to programmatically select the contents of a rectangular area at runtime, selecting among various controls to display? If so, you could use a custom TabControl which has its tabs (not the pages) hidden.
Then you can select which page is displayed by programmatically changing its SelectedIndex property at runtime.
Doing it like this means that your form editor will show a normal tab control, which allows you to much more easily add the content to each page - but at runtime the tabs will be hidden from the user; they will just see the contents of the currently selected page.
See Hans Passant's answer here for how to create such a custom tab control.
(However, you might also want to override the OnKeyDown for the custom tab control in order to ignore Ctrl-Tab.)

C# make each panel in a separate view

I would like to know how I could possibly modulate my views in an application. Let me explain.
Instead of building my view and adding all the components in one screen. I want to say put each panel in its own class / form and then have a main form where I can add and remove these 'modular' panels.
Is this possible and how would I go about doing it?

In Windows Forms there is the concept of an empty component called UserControl, that can be freely designed and added at any time to another component or form container. UserControls are used very often in order to create flexible and exchangable UI. You can create a UserControl item in Visual Studio like this:
Name the new control:
After that you can design your UI control:
When your are done with the design, compile your project/solution and go to the form where you want to add your newly designed control. In the toolbar panel you will see your new UserControl, which can be added to the form with drag & drop (with the mouse):
You can create as many UserControls as you want and add/remove them to/from your form.
All of this steps can be done completely in the code. In order to create new view of this kind, you need to create a new class that inherits the predefined UserControl class:
public class EditorUserControl : UserControl
{
}
Every Control element has a ControlsCollection that holds/contains components of type Control that are drawn when the UI is shown. In order to add your new control to the main panel you need to add it to the controls collection:
public partial class EditorUserControl : UserControl
{
public EditorUserControl()
{
var button = new Button();
button.Text = "Import";
this.Controls.Add(button);
}
}
Note, that when adding components manually, you are responsible for sizing and position them. Predefined layout panels can help you here:
TableLayoutPanel - layout with cells
SplitPanel - horizontal or vertical predefined resizable panels
etc.
Now all that left is to add the new user control to the main form just like you added the UI elements to your own control:
var simpleEditor = new EditorUserControl();
simpleEditor.Dock = DockStyle.Fill;
this.Controls.Add(simpleEditor);
You can adjust the UI control settings through its predefined properties.
You can mix predefined containers and UserControls in order to achieve the desired UI:
There are a lot of good beginners tutorials for C# and VS and .NET:
Channel9 tutorials
MSDN Visual Studio UI tutorials
Composite UserControl tutorial
Developing with Windows Forms Documentation and Examples

This is definitely possible. I will use WinForms but there are similar ways in WPF such as frames.
In WinForms you can create a new User Control for each 'modular' panel which will automatically create .cs and .designer.cs files just like in a normal Form. You can then add logic and functionality to the panels as if they were forms themselves. All that would then remain is to add the logic to the form to load the default panel on startup and think of ways of how other panels can be brought into view (e.g. a next button or having a panel on each tab in a tab control). Showing a panel in a form (or any other user control for that matter) is achieved by creating an instance of your desired panel and adding it to you form/control's Controls property like so:
public Form1()
{
InitializeComponent();
MyPanel panel = new MyPanel();
this.Controls.Add(panel);
}

acessibility mode changing

I had two forms form1 and form2 .I need to acess the datas of toolbar components of form 2 from form1
it may be like
string s= form1.lblstatus.text ;
and when I searched it says the control in form 2 must be declared private to acess like this but how can we set the acessibility mode for labels and other controls in vs2010

You need it public, not private.
You can do this in Designer mode (what it seems you're using) of VS2010 as follows:
Click on the Control you need to access.
On the bottom-right of the screen, in the "Properties" window, scroll down to "Modifiers" and click on it.
Click on the arrow that appears to the right of "Private".
Click on "Public".

Assuming you are only reading the data, you could create a public, read-only property on Form2.
public string Status
{
get
{
return lblStatus.Text;
}
}

Adding a TrackBar control to a ContextMenu

Is it possible to add a TrackBar control to a ContextMenu? So when I right click, my ContextMenu will drop down and a TrackBar will appear as a menu item?

If your context menu is a ContexMenuStrip, you can create an item in this way:
[ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.MenuStrip |
ToolStripItemDesignerAvailability.ContextMenuStrip)]
public class TrackBarMenuItem : ToolStripControlHost
{
private TrackBar trackBar;
public TrackBarMenuItem():base(new TrackBar())
{
this.trackBar = this.Control as TrackBar;
}
// Add properties, events etc. you want to expose...
}
Thanks to the ToolStripItemDesignerAvailability attribute, you can even see the item in the Forms Designer, as shown in the image below:
P.S.
This solution comes from this MSDN example

Yes, you need to set the context menu to user draw and draw the menu items yourself. You will have to create a custom MenuItem the implementes a TrackBar

For what it's worth for anyone who stumbles across this having problems with:
Constructor on type 'System.Windows.Forms.ToolStripControlHost' not found.
The only way I got it to work was by putting the derived control in it's own file. When it is in the same file as another control it confuses the designer.

Building C# .NET windows application with multiple views

I'm rewriting an old application and use this as a good opportunity to try out C# and .NET development (I usually do a lot of plug-in stuff in C).
The application is basically a timer collecting data. It has a start view with a button to start the measurement. During the measurement the app has five different views depending on what information the user wants to see.
What is the best practice to switch between the views?
From start to running?
Between the running views?
Ideas:
Use one form and hide and show controls
Use one start form and then a form with a TabControl
Use six separate forms

Creating a bunch of overlaid panels is a design-time nightmare.
I would suggest using a tab control with each "view" on a separate tab, and then picking the correct tab at runtime. You can avoid showing the tab headers by putting something like this in your form's Load event:
tabControl1.Top = tabControl1.Top - tabControl1.ItemSize.Height;
tabControl1.Height = tabControl1.Height + tabControl1.ItemSize.Height;
tabControl1.Region = new Region(new RectangleF(tabPage1.Left, tabPage1.Top, tabPage1.Width, tabPage1.Height + tabControl1.ItemSize.Height));

What I do is to have a Panel where your different views will sit on the main form.
then create user controls for your different views.
Then when I want to switch between a'view' you dock it to Panel on the main form.. code looks a little like this.
i preffer this because you can then reuse your views, like if you want to open up a view in a tab you can dock your user controls inside tab pages.. or even inherit from
tabpage instead of usercontrol to make things a bit more generic
public partial class MainForm : Form
{
public enum FormViews
{
A, B
}
private MyViewA viewA; //user control with view a on it
private MyViewB viewB; //user control with view b on it
private FormViews _formView;
public FormViews FormView
{
get
{
return _formView;
}
set
{
_formView = value;
OnFormViewChanged(_formView);
}
}
protected virtual void OnFormViewChanged(FormViews view)
{
//contentPanel is just a System.Windows.Forms.Panel docked to fill the form
switch (view)
{
case FormViews.A:
if (viewA != null) viewA = new MyViewA();
//extension method, you could use a static function.
this.contentPanel.DockControl(viewA);
break;
case FormViews.B:
if (viewB != null) viewB = new MyViewB();
this.contentPanel.DockControl(viewB);
break;
}
}
public MainForm()
{
InitializeComponent();
FormView = FormViews.A; //simply change views like this
}
}
public static class PanelExtensions
{
public static void DockControl(this Panel thisControl, Control controlToDock)
{
thisControl.Controls.Clear();
thisControl.Controls.Add(controlToDock);
controlToDock.Dock = DockStyle.Fill;
}
}

Tabbed forms are usually good... but only if you want the user to be able to see any view at any time... and it sounds like you might not.
Separate forms definitely works, but you need to make sure that the switch is seemless...if you make sure the new form appears the same exact size and location of the old form, it will look like it thew same for with changing controls.
The method I often use is actually to pre-setup all my controls on individual "Panel" controls and then show and hide these panels as I need them. The "Panel" control is basically a control container... you can move the panel and all controls on it move relative. And if you show or hide the panel, the controls on it do the same. They are great for situations like this.

The method I often use is actually to
pre-setup all my controls on
individual "Panel" controls and then
show and hide these panels as I need
them.
Instead of making each view a panel within a single form you could make each view a UserControl. Then create a single form and write code to create and display the correct UserControl in the Form and to switch from one to the next. This would be easier to maintain because you will have a separate class for each view instead of a single Form class with 6 panels each with their own controls -- that seems difficult and error prone to maintain.

I would also check out Composite Application Guidance for WPF or Smart Client Software Factory