public void SetCellStyle(string cell, object style)
{
if (read_only)
{
throw new Exception("Excel file is opened in read only mode and can't be modified!");
}
var p = sheet_data.IndexOf("r=\"" + cell + "\"");
var p2 = sheet_data.IndexOf("s=\"", p).Add(3);
var p3 = sheet_data.IndexOf("\"", p2 + 1);
var p4 = sheet_data.IndexOf(">", p);
if (p4 < p2)
{
}
else
{
sheet_data = sheet_data.Remove(p2, p3 - p2);
sheet_data = sheet_data.Insert(p2, style + "");
}
}