foreach (GridViewRow row in GridView1.Rows)

I've been wondering why you need another code since that iterating for GridViewRow is better in a foreach statement. But if you just want to know, then try Solution 1 or Solution 2. Or try this as well.

int i = 0;
while(i < GridView1.Rows.Count)
{
//Your code here, use i as index throughout iteration
i++;
}

Best regards,
Eduard

You can iterate with a for loop:

for (int i=0;i<gridview1.Rows.Count;i++){
   GridViewRow row = GridView1.Rows[i];
   // the rest o your code
}