CODEWITHSUNDEEP
c#winformsdatagridview
Sam
Sam

Reputation: 303

How to prevent DataGridView from flickering when scrolling horizontally?

I am using windows forms C#.

Screen Shot

As shown in the screen shot, I have a Form which has a user control, a tab control and a DataGridView (30 rows and 17 columns). I read data from SQL Server to fill the DataGrdiView.

The issue:

When I scroll horizontally the DataGridView flickers a lot. However scrolling vertically works perfect with no flickering.

I had a look here, here, here and here but none of them related to my issue.

Anyone knows any solution to prevent DataGridView from flickering when scrolling horizontally.

Upvotes: 10

Views: 15596

Answers (4)

Khalil
Khalil

Reputation: 225

In your 'FormLoad' function just enter this line of code.

yourDataGridView.GetType().GetProperty("DoubleBuffered", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(yourDataGridView, true, null);

and import BindingFlags by writing below line on top.

using System.Reflection;

Upvotes: 9

TaW
TaW

Reputation: 54433

All you need is to use a DoubleBuffered DataGridview subclass: 

class DBDataGridView : DataGridView
{
    public DBDataGridView() { DoubleBuffered = true; }
}

It is also possible to inject double-buffering into a normal out-of-the-box control, but I prefer to have a class of my own as this is extensible in other ways as well..

I have expanded the class by a public property to allow turning DoubleBuffering on and off..:

public class DBDataGridView : DataGridView
{
    public new bool DoubleBuffered
    {
        get { return base.DoubleBuffered; }
        set { base.DoubleBuffered = value; }
    }

    public DBDataGridView()
    {
        DoubleBuffered = true;
    }
}

..and tested it with a load of 200 columns and 2000 rows. The difference is obvious; while vertical scrolling did work without horizontal scrolling needs DoubleBuffering..

enter image description here

Note that the Form also has a DoubleBuffering property, but that will not propagate to any embedded controls!

Or you can use a function like this

Upvotes: 16

Code Novice
Code Novice

Reputation: 2398

In case anybody wanted to see this in Visual Basic.

Public Class DBDataGridView
    Inherits DataGridView

    Public Sub New()
        MyBase.New()
        DoubleBuffered = True
    End Sub

End Class

This worked great.

Upvotes: 0

Ramgy Borja
Ramgy Borja

Reputation: 2458

use this class 

public static class ExtensionMethods
{
   public static void DoubleBuffered(this DataGridView dgv, bool setting)
   {
      Type dgvType = dgv.GetType();
      PropertyInfo pi = dgvType.GetProperty("DoubleBuffered", BindingFlags.Instance | BindingFlags.NonPublic);
      pi.SetValue(dgv, setting, null);
   }
}

and enter this code.

this.dataGridView1.DoubleBuffered(true);

enjoy.

Upvotes: 27

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