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Extremely Slow Population of a DataGridView

I'm using a DataTable-bound DataGridView that has ~20-30 columns of mostly Strings in a Windows Forms Application made in Visual C# 2008 Express. When I load ~40 rows into the table, the application appears to freeze, but 5-10 minutes later, it becomes responsive again (except for the vertical scroll bar, which has un-refreshed garbage in its place). Why is this happening? Thanks in advance.

Vivek

Viv1357 Tuesday, April 22, 2008 8:43 PM

I think I figured out why this is happening -- I wasn't making a thread-safe call while populating the DataGridView control. After I used the delegate method below, the problem disappeared:

Code Snippet

delegate void AddToDataTableCallback(MyRowData pInfo);
private void AddToDataTable(MyRowData pInfo)
{
if (dataGridView1.InvokeRequired)
{
AddToDataTableCallback a = new AddToDataTableCallback(AddToDataTable);
this.Invoke(a, new object[] { pInfo });
}
else
DataRow row = DataTable1.Rows.Add(pInfo.ToArrayList().ToArray());
}

Viv1357 Wednesday, April 23, 2008 8:17 PM

I think I figured out why this is happening -- I wasn't making a thread-safe call while populating the DataGridView control. After I used the delegate method below, the problem disappeared:

Code Snippet

Viv1357 Wednesday, April 23, 2008 8:17 PM

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