简单易用的DataGridView数据导出到Excel方法

   #region 导出DataGridView数据到exel
        /// <summary>
        /// 导出DataGridView数据到exel
        /// </summary>
        /// <param name="dataGridView1"></param>
        public void print(DataGridView dgvMaster)
        {
            try
            {

                if (dgvMaster.Rows.Count == 0)
                {
                    MessageBox.Show("没有可提取的数据！");
                    return;
                }

                Excel.Application excel = new Excel.Application();//2003EXCEL的用法
                //如果系统是Excl2007，添加的引用会不一样，代码如下。
                //Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                excel.Application.Workbooks.Add(true);

                for (int k = 0; k < dgvMaster.Rows[0].Cells.Count; k++)
                {
                    excel.Cells[1, k + 1] = dgvMaster.Columns[k].HeaderText;
                }
                for (int i = 0; i < dgvMaster.Rows.Count-1; i++)
                {
                    for (int j = 0; j < dgvMaster.Columns.Count; j++)
                    {
                        if (dgvMaster[j, i].ValueType == typeof(string))