Enable scroll bars in windows forms

Question

I\'m developing a windows forms application. In my application I have anchored controls to forms such that forms can be maximized and controls will get arranged accordingly.

Answer 1

Create a Panel called panel, then do the following:

panel1.autoscroll  = true;
panel1.BorderStyle = BorderStyle.FixedSingle;

Use this method to set scroll width and height:

panel1.SetAutoScrollMargin(int x,int y);

Answer 2

It's an old post but the issue is ongoing and related posts just keep on arriving on SO!

I'm doing the necro thing here rather than addressing a more recent question only because it comes top of my google search

The question is simple: "why won't the damn scrollbars appear on my ScrollableControl?"

But there can be no specific, definitive answer. Because the causes are legion. Because whether or not scrollbars appear on a control depends:

• not only upon it's own properties settings
• but also upon the state of it's parent control
• and also the states of any child controls.

It's easy to fall into the trap of randomly twiddling prop-values until the cows come home. Or go on the i/webs &hope to find some SO foos. But oh dear. Here is a handful of related SO posts with an outstanding variety of proposed resolutions:

Horizontal Scrollbar is not visible on DataGridView

Horizontal scrollbar not showing on my textbox

How to set scroll bar in Windows form

How to make scrollbars appear in a resizable panel when the contained control is too big for it?

Scrollable Form in c#, AutoScroll=true doesn't work

How to get scrollbar in Panel in VB.Net?

There are screen-shots of VS-designer property pages (like here) & even some extreme code-based solutions... my favourites:

Add vertical scroll bar to panel in .NET

how to add Vscroll control to form in Visualbasic.net?

/sighs/

---

A general answer

..in the form of a minimal github solution in order to explore some of the .NET scrollbar voodoos:

https://github.com/violet313/TestWinForms/tree/Test1-Body-Panel

It's a Visual Studio 2015 solution using the .NET4.52 framework.

In the solution i am trying to create a form that responds to some dynamic text data that is to be displayed. here's the basic lay-out i am ultimately seeking:

--------------------------------------------------
|      fixed-size form header       |            | 
------------------------------------|   side     |
|                                   |   panel    |
|      dynamic content panel        |   stuff    |
|                                   |            |
--------------------------------------------------
|      fixed-size form trailer                   |               
--------------------------------------------------

I want the form to:

• not be resizable by the user

• respond to the dynamic content by:

  • shrinking as small as possible down to a pre-determined minimum form-size.
  • growing up to a pre-determined maximum form-size; and providing appropriate scroll-bars on the dynamic content panel thereafter.

Grab it, go thro each of the (only 9 starting from 95dccc5)commits and then test your requirements in a sane & incremental fashion. be sure to branch whenever you make a dubious state-change.

Irl: maybe i'm a thicky but it took me over an hour reading the MSDNs trying (&failing) to figure-out the .NET forms control property contingencies. doing structured trial-and-error this way took me only 20mins to get what i wanted.

---

y~bwc

i know this here is a yeaz ~but who cares? but i had to get if off my chest. heh :

grrr. having to unlurk &answer this question arises out of my need to profitably take on Microsoft contract work. paymasters can be relatively (from a developer pov) non-technical and, having read lots of stuff including the words: quick, simple, straight-forward, secure, etc, come away with the impression that things .NETish is a stroll in the park. My issue with this is that i would then have difficulty trying to reasonably explain why they might need to pay me for n-day's worth of work in order to get a simple scroll-bar to appear on a responsive form.

On this occasion, i never got that far. lol. i spent a few hours wading thro the MSDN blahs trying to make it happen. and then yawned, gave up, &moved on with a pragmatic implementation. which was accepted. but it's now the w/end and i am an ocd fool who cannot let things be.

Answer 3

Set AutoScroll = True In Form Properties

Answer 4

I was reading through this page and i can say it provides an exact and easy solution to your problem!

I tested it and it worked well for me.

Instruction:

1. Add a manifest file to your project (Project --> New Item --> Select the manifest type)
2. Add the following XML into your app.manifest (may be another name):

<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3" >
   <asmv3:application>
        <asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
             <dpiAware>true</dpiAware>
        </asmv3:windowsSettings>
   </asmv3:application>
</assembly>

3. Add the following C# code into the class where you call the component initialize (InitializeComponent();)

[DllImport("shcore.dll")]
static extern int SetProcessDpiAwareness(_Process_DPI_Awareness value);

enum _Process_DPI_Awareness
{
    Process_DPI_Unaware = 0,
    Process_System_DPI_Aware = 1,
    Process_Per_Monitor_DPI_Aware = 2
}

4. Now just add this code line above your initialize component method (by default InitializeComponent();)

SetProcessDpiAwareness(_Process_DPI_Awareness.Process_DPI_Unaware);