Here is my code,
GridView1.Rows[i].Cells[j].Attributes.Add("Style", CalculateProgressBarValue(Convert.ToInt32(GridView1.Rows[i].Cells[j].Text), GridView1.Rows[i].Cells[j].Height.Value));
private String CalculateProgressBarValue(int verimlilik, double heightt)
{
String...