CODEWITHSUNDEEP
winformsevents
Arpit Khandelwal
Arpit Khandelwal

Reputation: 1803

Is there "LoadComplete" such an event in Windows Forms?

I want my windows form to be loaded first, render its children and all. After that load heavy data in it. This is why I am looking for any event which I could use just after form loading is complete.

Any thoughts on this?

Upvotes: 0

Views: 2870

Answers (4)

mkaj
mkaj

Reputation: 3489

Like MikeP said you want to handle the Form.Shown event just once. So just attach to the even and detach once done.

    private void frmMain_Load(object sender, System.EventArgs e)
    {
        // Do stuff in form load.

        Shown += FirstShown;
    }

    private void FirstShown(object sender, EventArgs eventArgs)
    {
        Refresh();

        // Do something here

        // Detach from this event.
        Shown -= FirstShown;
    }

Upvotes: 1

Daniel Mošmondor
Daniel Mošmondor

Reputation: 19956

I do that in a way that I fire a timer with duration of 1, and kill it in the event, and with that method, I know that message loop will be empty and form initialization will be complete when my event comes.

Event is set up from Form_OnLoad() method.

Upvotes: 0

MikeP
MikeP

Reputation: 7959

Perhaps you're looking for the Form.Shown event. If you're doing a lot of intensive work though, perhaps you should be using a background thread anyway to avoid locking up the UI.

Upvotes: 2

Jonathan Dickinson
Jonathan Dickinson

Reputation: 9218

I have never found a better solution than Activated; although that is raised every time the form receives focus - so you need to filter out all the times after the first:

bool _firstActivation = true;
void Form1_Activated(object sender, EventArgs e)
{
    if (_firstActivation)
    {
        _firstActivation = false;
        OnFirstActivation();
    }
}

private void OnFirstActivation()
{

}

Upvotes: 3

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