Take screenshot of WinForm after it has loaded

Question

I have a screenshot application where a user can pass command line arguments, and based on those arguments will determine the behaviour of the form.

I am trying to take a screenshot after the form has loaded, however I have the functionality to do this after InitializeComponent();. Like so-

if (counts > 0)
        {
            generateScreenshotButton_Click(null, null);

            button2_Click(null, null);
        }

My problem being these functions are firing before the form has loaded. Therefore the screen shot is blank. How can I resolve this?

Add Loaded event... http://msdn.microsoft.com/en-us/library/system.windows.forms.form.load.aspx — Ionică Bizău, Aug 21 '12 at 09:20
Side note...create methods and call them instead of event handlers. `button2_Click` tells nothing. — Renatas M., Aug 21 '12 at 09:29

score 1 · Answer 1 · edited Aug 21 '12 at 09:27

1

Have you tried using MainForm Loaded event?
And in that event handler do your stuff? :)

Or maybe using Shown event?

edited Aug 21 '12 at 09:27

sloth

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answered Aug 21 '12 at 09:19

Franz1986

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score 1 · Accepted Answer · edited May 23 '17 at 12:12

1

Add Load event in your Form.cs file.

There is a difference between InitializeComponent and Form Load. See What does InitializeComponent() do, and how does it work in WPF? It is for WPF but is same in Windows Forms.

Try this code:

public Form1()
        {
            InitializeComponent(); //this is the InitializeComponent method. this This method locates a URI to the XAML for the Window/UserControl that is loading, and passes it to the System.Windows.Application.LoadComponent() static method. 
            this.Load += new EventHandler(Form1_Load); //this create Load Form event
        }

        void Form1_Load(object sender, EventArgs e) //after your form is completely loaded, your program will run the code from here...
        {
            //your code goes here
        }

Hope that I helped you.

edited May 23 '17 at 12:12

Community

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answered Aug 21 '12 at 09:22

Ionică Bizău

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This still fires the button click before the form has fully loaded? – Ebikeneser Aug 21 '12 at 09:33
No, this is the idea. If you put your method inside of `Form1_Load` button click will be fired after form was fully loaded. – Ionică Bizău Aug 21 '12 at 09:35
i dont understand this, currently my button click is in the initialise component section, this is also where I gather the values. What do you suggest I put into Form1_Load???? – Ebikeneser Aug 21 '12 at 12:22
See the edits. Hope that you understand better. Did you try to put your code in `Form1_Load`? – Ionică Bizău Aug 21 '12 at 18:30

Take screenshot of WinForm after it has loaded

2 Answers2