CODEWITHSUNDEEP
c#winformsflicker
Mogli
Mogli

Reputation: 2012

How to avoid screen flickering?

I am making a windows form application and mainly my screen is divided between 3 parts like

===========================================================================
                    Top panel (it doesn't flicker)
===========================================================================
||         || 'it has a panel & panel contains a table layout,this tabble layout'
||         || 'has a picture box and a label, picture & text of label is'           
||         ||'changed on the click of side bar menu' (PROB: this flickers a lot)
||side bar ||==============================================================
||(doesn't ||'this part also has a panel and panel contains different table'
||flicker) ||'layouts and on the click of a menu, related table layout is shown and'  
||         ||'some of the parts of table layout are created dynamically.'
||         ||           
||         ||                (PROB: this flickers a lot)
||         ||

i searched a lot and found this solution everywhere and i tried this

public constructor()
    {
        InitializeComponent();
        this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
        this.DoubleBuffered = true;
        DoubleBuffered = true;
        SetStyle(ControlStyles.UserPaint |
                      ControlStyles.AllPaintingInWmPaint |
                      ControlStyles.ResizeRedraw |
                      ControlStyles.ContainerControl |
                      ControlStyles.OptimizedDoubleBuffer |
                      ControlStyles.SupportsTransparentBackColor
                      , true);
    }

i also tried this

protected override CreateParams CreateParams
{
get
{
CreateParams handleParam = base.CreateParams;
handleParam.ExStyle |= 0x02000000;   // WS_EX_COMPOSITED       
return handleParam;
}
}

it changes the whole background of my screen to black color.

but still problem remains the same, can someone tell me how to solve this problem and where i am doing mistake ? Thanks a lot in advance.

Upvotes: 4

Views: 1140

Answers (1)

Dragonalighted
Dragonalighted

Reputation: 365

Without more to go on, my gut says that you are either adding a lot of data do those areas or there is a lot of resizing going on.

try this anywhere you update the screen ( adding rows to listviews/boxes/etc ) or resize the screen, or anything else that will cause the screen to redraw. ex: 

public void something_resize(object sender, EventArgs e)
{
    try
    {
        this.SuspendLayout(); 

        // Do your update, add data, redraw, w/e. 
        // Also add to ListViews and Boxes etc in Batches if you can, not item by item.  
    }
    catch
    {
    }
    finally
    {
        this.ResumeLayout(); 
    }
}

Its important to put the ResumeLayout() call in the finally block, because if an exception occurs for w/e reason, you want your window to layout, regardless of what you do with the exception.

Upvotes: 2

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