Wait until the form is completed.

Question

Is there some kind of boolean that I can use to check if the form instance is loaded, or else wait for the form to load?

eg:

While(form_loaded == false) { Try { //do something } catch { }//do try catch so code won't barf } 

I get the following exception:

The first random error like "System.InvalidOperationException" occurred in System.Windows.Forms.dll

An unhandled exception of type "System.InvalidOperationException" occurred in System.Windows.Forms.dll

Additional Information: Invoke or BeginInvoke cannot be called in a control until a window handle is created.

This is what I'm worried about.

In addition, if a more detailed explanation is required, I can try to publish some code and / or additional information about debugging output.

Answer 1

try to use the event shown something like this

  public partial class Form1 : Form { public Form1() { InitializeComponent(); this.Shown += new System.EventHandler(this.Form1_Shown); } private void Form1_Shown(object sender, EventArgs e) { } } 

hope this help

Answer 2

The first event that fires after the form is fully loaded is the Shown event. use it ...

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According to the MSDN sequence of events:

When starting the application

• Control.HandleCreated
• Control.BindingContextChanged
• Form.load
• Control.VisibleChanged
• Form.Activated
• Form.Shown

When the application closes:

• Form.Closing
• Form.FormClosing
• Form.Closed
• Form.FormClosed
• Form.Deactivate

And as @Henk Holterman said in his answer, don't use wait in an event driven form ...

Answer 3

You have the event Loaded and Shown .

Windows is an event, so never wait for something in a loop.