private void button2_Click(object sender, EventArgs e)
        {
            DataTable dataTable    = MysqlControl.Selectvalue("155", "222", "1").Tables[0];
            int       rowNumber    = dataTable.Rows.Count;
            int       columnNumber = dataTable.Columns.Count;

            if (rowNumber == 0)
            {
                MessageBox.Show("没有任何数据可以导入到Excel文件!");
            }
            //建立Excel对象
            Excel.Application excel = new Excel.Application();
            excel.Application.Workbooks.Add(true);
            excel.Visible = true;//是否打开该Excel文件

            //填充数据
            for (int c = 0; c < rowNumber; c++)
            {
                for (int j = 0; j < columnNumber; j++)
                {
                    excel.Cells[c + 1, j + 1] = dataTable.Rows[c].ItemArray[j];
                }
            }

            excel.GetSaveAsFilename();
        }
 private void button1_Click(object sender, EventArgs e)
 {
     dataGridView1.DataSource = null;
     dataGridView1.DataSource = MysqlControl.Selectvalue("123", "2", "1").Tables[0];
 }