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C# Winform how to allow panel draw outside the panel's parent?

I have created a form that shows data and the filter that has checkbox in it
combobox
I have used a Button and a Panel to do this and found that the panel is only shown in the parent's panel not float like the combobox
or panel can't do like this?
Regards

You want something that cannot be done with parented components (like panels)
I see some options:
(1) owner draw a combobox to include checkboxes, see Codeprojects https://www.codeproject.com/Articles/31105/A-ComboBox-with-a-CheckedListBox-as-a-Dropdown
or
(2) Create a small floating popup form without system menu and a single pixel border. Inside the form, you could place a CheckListBox docked Fill to allow for filter checkboxes for each item.. you may have a look at this topic Is there a simple way to implement a Checked Combobox in WinForms
(3) Both solutions have drawbacks. Actually it may be better to avoid it, find another way to specify your filter options, redesign your UI.

How do I keep my winforms controls from overlapping when I expand the application?

I have a pretty simple winforms application. It contains a rich edit box, embedded browser, progress bar, a few buttons etc.
I have the anchors on the controls set to expand in all directions.
When expanding up and down, however, the controls will overlap one another. How do I prevent this from happening?
Thanks

Your best bet is to add a TableLayoutPanel to your form which contains the "layout grid" this should be docked to the form, then you can add your controls into the cells in the table (they can cover multiple rows and columns so you can get the layout you want).

You must set the property Autosize=true on every control, especially on the main form.
Note that some controls like TabControl have this property, but you can't see it with intellisense (Attribute Browseable=false).

Windows form and user control layout programmatically

How can I dynamically add a user control to my form and making sure it is aligned properly? In other words, what's the easiest way to control how things are aligned (centered, vertically, horizontally, etc.) when adding it dynamically to my form?
I found the following that works:
http://www.vcskicks.com/align-user-interface.php

One option if you want to explicitly define the location of each new control:
lets say you have a list of objects that you want to create controls for but in different instances you may have a different number of objects in the list. You can loop over the list, instantiating a new control for each item, and placing that control on the form or in another control(like a layout panel) and then explicitly assign the properties of the new control, specifically the location.
Say you want all of your dynamically added controls to be lined up vertically;
assign newcontrol.Location = new System.Drawing.Point(550, offset);
and increment offset by the desired spacing each time you go through the loop.

How do I create a Tab Control with no Tab Header in Windows form?

I have created a Windows form using a Tab Control, but it has a header with it. I want to hide it. I am not able to do it using any properties of the Tab Control. Is there any property defined for hiding the tab header for the Tab Control without going through the code?

Use following code to hide the tabs or set these properties in design.
tabControl.Appearance = TabAppearance.FlatButtons;
tabControl.ItemSize = new Size(0, 1);
tabControl.SizeMode = TabSizeMode.Fixed;

You want the tab panels without the feature allowing a user to switch between them, so I suppose you want to create few separate sets of controls to be shown to the user one at a time. You can achieve this in several ways (you can choose one of them if you find it appropriate in your case):
Use several Panel controls instead of several tabs in the TabControl, however, it would be hard to work in the designer, because all the controls would be visible
Use different Forms instead of tabs to keep the layout parts separated. It can be ok, but you may not want to use multiple Forms, so it depends on a specific case.
and finally, the suggested solution:
Encapsulate each set of controls in a UserControl. This allows you to keep each layout separately, so you can easily design each of them without the other controls getting in the way ;). The the code handling each of the layouts would also be separated. Then just drag those controls in the Form and use set their visibilities appropriately to show the one you want.
If none of those suggestions work for you, let me know, so I can look for other possible solutions.

It's more easy as you think, you just drag the panel's window upper, so will be outside of the form.

Use DrawMode: OwnerDrawFixed will hide TabPage header text DrawMode : OwnerDrawFixed

Another way to achieve the same (or similar) is: You can remove tabs from TabControl.TabPages collection and then add the tab you want to show.
During the Form initialization I remove tabs (so into the designer I can easily manage them) and in some control event (as button click) I show the tab the user has to see.
Something like that:
// During form load:
ctrTab.TabPages.Clear();
// ......
// During button click or some other event:
if(rbSend.Checked)
ctrTab.TabPages.Add(pgSend);
else
ctrTab.TabPages.Add(pgReceive);
In this way the user can still see the header tab but just as title of controls group, he can't change/switch the current active tab.

Dynamic top down list of controls in WindowsForms and C#?

In our project, SharpWired, we're trying to create a download component similar to the download windows in Firefox or Safari. That is, one single top down list of downloads which are custom controls containing progress bars, buttons and what not.
The requirements are that there should be one single list, with one element on each row. Each element must be a custom control. The whole list should be dynamically re-sizable, so that when you make it longer / shorter the list adds a scroll bar when needed and when you make it thinner / wider the custom controls should resize to the width of the list.
We've tried using a FlowLayoutPanel but haven't gotten resizing to work the way we want to. Preferably we should only have to set anchoring of the custom controls to Left & Right. We've also thought about using a TableLayoutPanel but found adding rows dynamically to be a too big overhead so far.
This must be quite a common use case, and it seems a bit weird to me that the FlowLayoutPanel has no intuitive way of doing this. Has anyone done something similar or have tips or tricks to get us under way?
Cheers!
/Adam

If you don't want to use databinding (via the DataRepeater control, as mentioned above), you could use a regular Panel control and set its AutoScroll property to true (to enable scrollbars).
Then, you could manually add your custom controls, and set the Dock property of each one to Top.

.NET 3.5 SP1 introduced a DataRepeater Windows Forms control which sounds like it'd do what you want. Bind it to the list of "downloads" (or whatever your list represents) and customize each item panel to include the controls you need.