ReoGrid Forum

xy

Member

Registered: 2015-01-12

Posts: 1

Memory leak occurs in 0.8.8

Hi, Jing,
i like this control, but i found there is a memory leak when use it.
e.g, after run below code, the memory will increase about 6 MBs.

var grid = new ReoGridControl();
var sheet = grid.CurrentWorksheet;
int rows = 3000, cols = 10;
sheet.Resize(rows, cols);
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
sheet[i, j] = i * cols + j;
}
}
grid.Dispose();

or do i have a wrong use with it?
thank you.

Jingwood

Moderator

From: jing at reogrid.net

Registered: 2014-06-03

Posts: 615

Re: Memory leak occurs in 0.8.8

Hi, Thanks!

I've tested this and confirmed that grid control didn't release memory before destroy. I will fix this in next release. Before that please use the following code instead:

var grid = new ReoGridControl();
var sheet = grid.CurrentWorksheet;
int rows = 3000, cols = 10;
sheet.Resize(rows, cols);

for (int i = 0; i < rows; i++)
{
  for (int j = 0; j < cols; j++)
  {
    sheet[i, j] = i * cols + j;
  }
}

sheet.Reset();   // clear worksheet

grid.Dispose();

The method Reset of worksheet will help to release the used memory, but since it also create some objects so a few memory will not be released.
After adding this method call, memory increasing 6MB will be decreased to about 400KB.

And sometimes, call the garbage collection of .NET Run-time to force release memory might also work.

GC.Collect(0, GCCollectionMode.Forced);

thanks, Jing