Read, write and processing each row of a gridview ?

Question

Case:

1. While running loop to browse handle each record in Form1 and assign into cell with string: "processing" it is not assign "processing" when it runs through, when loop end new assignment string "xxx.." into cell, are you know why ? , While tracking Debug.Print command ("Processing... "); ran pass

[CODE]

...

bool bCalculator = false;

while (i < gridView1.RowCount)

{

...

gridView1.SetRowCellValue(i, "Status", "Processing..."); 

gridView1.RefreshRow(i);  // Not working

//gridView1.RefreshData(); // Not working

Debug.Print("Processing... ");

Thread.Sleep(100);

bCalculator = objclsProcessing.Calculator(row);

...

}

[/CODE]

2. While running GridView1 not show the flow (row of gridview) is running?