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How can I optimize pixel scrolling in the GridControl?

Description:

The Grid's base class pixel scrolling is not optimized for large row scenarios. In the derived GridControl, you have to override a couple of virtual methods to make it perform well and use binary tree structures to quickly get the row index for an absolute pixel position and vice versa.

Solution:

The following steps are given to optimize the pixel scrolling:

Step 1: Create a Custom derived GridControl and override the following methods for optimized vertical scrolling.

  • RowIndexToVScrollPixelPos(int rowIndex)
  • VScrollPixelPosToRowIndex(int pixelPos, out int rowIndex, out int pixelDelta)
  • GetVScrollPixelHeight()

C#

VB

Step 2: Assign the new custom control to the GridControl.

C#

VB

Step 3: Set the VScrollPixel property to true.

C#

VB

The following screenshot displays the vertical scrolling optimization in the GridControl.

 

Figure 1: Vertical scrolling optimization

Sample Links:

OptimizePixcelScrolling-C#2064456570.zip

OptimizePixcelScrolling-VB-1952192200.zip

Article ID: Published Date: Last Revised Date: Platform: Control:
663 04/30/2011 02/24/2016 Windows Forms GridControl
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