保存DataGridView数据到excel

这个是导出数据的类。 

特别说明：导出时需要有一个只有一行标题列名行的excel文件。

 

public class CExcelWrite
    {
        private OleDbConnection m_oleconn;
        private OleDbCommand m_olecomm;

        /// <summary>
        /// 准备开始写excel文件
        /// </summary>
        /// <param name="colcount">被写Excel文件列数</param>
        /// <param name="modfilename">模板文件路径</param>
        /// <param name="destfilename">被写文件路径</param>
        public void BeginWrite(int colcount,string modfilename,string destfilename)
        {
            if (System.IO.File.Exists(destfilename))
                    System.IO.File.Delete(destfilename);
            System.IO.File.Copy(modfilename, destfilename);
            string connstr = string.Format(
                "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties='Excel 8.0;HDR=no';Data Source={0}",
                destfilename);
            string commstr = "";
            string commstr1 = "";
            m_oleconn = new OleDbConnection(connstr);
            m_oleconn.Open();
            m_olecomm=new OleDbCommand();
            m_olecomm.Connection = m_oleconn;

            commstr = "insert into [Sheet1$](";
            commstr1 = "values(";
            for (int i = 1; i <= colcount; i++)
            {
                commstr += "F" + i.ToString();
                commstr1 += "?";
                if (i < colcount)
                {
                    commstr += ",";
                    commstr1 += ",";
                }
            }
            commstr += ")";
            commstr1 += ")";
            m_olecomm.CommandText = commstr + commstr1;
            for (int i = 1; i <= colcount; i++)
                m_olecomm.Parameters.Add("@Col" + i.ToString(), OleDbType.VarChar, 250);
        }

        /// <summary>
        /// 写入一行数据
        /// </summary>
        /// <param name="outdata"></param>
        public bool WriteLine(string[] outdata)
        {
            if (m_oleconn!=null && outdata != null && outdata.Length > 0)
            {
                for (int i = 0; i < outdata.Length; i++)
                {
                    m_olecomm.Parameters[i].Value = outdata[i];
                }
                m_olecomm.ExecuteNonQuery();
                return true;
            }
            return false;
        }

        /// <summary>
        /// 结束写入数据
        /// </summary>
        public void EndWrite()
        {
            if (m_oleconn != null)
            {
                m_olecomm.Dispose();
                m_oleconn.Close();
                m_oleconn = null;
                m_olecomm = null;
            }
        }

        ~CExcelWrite()
        {
            EndWrite();
        }
    }

 

使用方法

private void btnoutexcel_Click(object sender, EventArgs e)
        {
            if (sFDExcel.ShowDialog() == DialogResult.OK)
            {
                if (dGVmszh.Rows.Count > 0)
                {
                    string[] coldata = new string[7];
                    CExcelWrite cew = new CExcelWrite();

                    //初始化
                    cew.BeginWrite(7, Application.StartupPath + "//ModelFile.xls", sFDExcel.FileName);
                    foreach (DataGridViewRow dgvr in dGVmszh.Rows)
                    {
                        int j = 0;
                        for (int i = 1; i <= 3; i++,j++)
                            coldata[j] = dgvr.Cells[i].Value.ToString();
                        for (int i = 5; i <= 8; i++,j++)
                            coldata[j] = dgvr.Cells[i].Value.ToString();
                        //写入一行
                        cew.WriteLine(coldata);
                    }
                    //结束写入
                    cew.EndWrite();
                }
            }
        }