//写入标题
for (int i = 4; i < 7; i++)
{ worksheet.Cells[1, i - 3] = this.dataGridView_TAG.Columns[i].HeaderText; }
//写入数值
/* for (int r = 0; r < this.dataGridView_TAG.Rows.Count; r++) // 怎么改?
{
for (int i = 0; i < dataGridView1.ColumnCount; i++)
{
worksheet.Cells[r + 2, i + 1] = dataGridView1.Rows[r].Cells[i].Value;
}
System.Windows.Forms.Application.DoEvents();
}*/