C# – Is an event thrown when a custom control gets its final size? (.NET Compact Framework)

ccompact-frameworkcustom-controlswinforms

I'm developing a Windows Mobile 5.0 or above with .Net Compact Framework 2.0 SP2 and C#.

I have a custom control called PullDownMenu (it inherits from System.Windows.Form.Control). This is the code that I use on a WinForm to show it:

PullDownMenu menu = new PullDownMenu();
menu.Location = new Point(0, 0);
menu.Dock = DockStyle.Fill;
this.Controls.Add(menu);

I've noticed that it size changes during this process. How can I know when it gets its final size?

Yes, I know I can check OnResize event but this event it is called several times and I think it can downgrade the performance.

Is there an event that is thrown when the control is completely displayed? or when it is added to its parent (on this line: this.Controls.Add(menu);).

Any advice?

Best Answer

Some of the controls in the Compact Framework support BeginUpdate and EndUpdate methods which may help this issue. Using a custom control, I believe that you may have to implement your own methods to support this behavior.

To improve rendering performance, call the BeginUpdate, update the properties that may change its size, and then call the EndUpdate method. This will minimize the render calls that are invoked by the resizing.

Related Solutions

C# – Choosing the right version of .Net Compact Framework

Microsoft maintains a document titled Devices and Platforms Supported by the .NET Compact Framework which outlines which OS releases the various versions of the .NET CF support and which version you can expect to find in each OS in ROM.

In general there is no right answer to your question.

As you can see from the table, excluding one or two edge cases (Smartphone 2003 etc) each release of the .NET Compact Framework will pretty much run on any Windows Mobile device you can throw at it.

This means the decision really comes down to the development productivity of using a later .NET CF version (LINQ, WCF etc), vs the potential difficulty of distributing and installing the required .NET CF runtime.

The decision of the feasability of installing the .NET CF runtime as part of your application installation process will depend upon your situation. For example in one cost sensitive corporate project I worked on we decided to use the version in ROM since deployments were done over the air and 10,000 devices x a couple of megabytes is a lot of additional bandwidth during app updates etc. Your situation probably has a different set of driving factors.

C# – Windows Mobile: how to hide Size property on a Custom Control

Just create a public property with the same name Size in your control:

public Size Size
{
    get { return base.Size; }
    set { base.Size = value; }
}

Then you can do something in the setter to prevent your control size from being changed to a size that doesn't match your image.

Best Answer

Related Solutions

C# – Choosing the right version of .Net Compact Framework

C# – Windows Mobile: how to hide Size property on a Custom Control

Related Topic