Winform datagridview Excel 导入导出

来源：互联网发布：淘宝网数据包下载编辑：程序博客网时间：2024/05/01 21:48

public class ExcelHelper
    {
        #region DataGidView数据到导出excel

public static void ExportExcel(DataGridView myDGV)
{
SaveFileDialog savefile = new SaveFileDialog();
savefile.Filter = "EXCEL文件|*.xls";
if (savefile.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
Microsoft.Office.Interop.Excel.Application excelapp = new Microsoft.Office.Interop.Excel.Application();
if (excelapp == null)
{
MessageBox.Show("无法创建Excel对象，可能你的机器上没有安装Excel！");
return;
}
Microsoft.Office.Interop.Excel.Workbook wbk = excelapp.Workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
Microsoft.Office.Interop.Excel.Worksheet wst = (Microsoft.Office.Interop.Excel.Worksheet)wbk.Worksheets[1];
try
{
//写入标题
for (int i = 0; i < myDGV.ColumnCount; i++)
{
wst.Cells[1, i + 1] = myDGV.Columns[i].HeaderText;
}
//写入数据
for (int r = 0; r < myDGV.Rows.Count; r++)
{
for (int i = 0; i < myDGV.ColumnCount; i++)
{
wst.Cells[r + 2, i + 1] = myDGV.Rows[r].Cells[i].Value;
}
System.Windows.Forms.Application.DoEvents();
}
wst.Columns.EntireColumn.AutoFit();//列宽自适应
wbk.SaveAs(savefile.FileName);
MessageBox.Show("导出成功");
}
catch (Exception ex)
{
MessageBox.Show("导出失败："+ex.Message,"导出异常");
}

//资源释放
System.Runtime.InteropServices.Marshal.ReleaseComObject(wst);
wst = null;

wbk.Close(null,null,null);
System.Runtime.InteropServices.Marshal.ReleaseComObject(wbk);
wbk = null;

excelapp.Workbooks.Close();
excelapp.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(excelapp);
excelapp = null;
System.GC.Collect();
}
}

#endregion

        #region Excel文件数据导入DataGidView
        /// <summary>
        /// 读取excel内的数据，返回DataTable
        /// </summary>
        /// <param name="strExcelFileName"></param>
        /// <returns></returns>
        public DataTable ImportExcel(string strExcelFileName)
        {
            string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + strExcelFileName + "';Excel 8.0; HDR=YES；IMEX=1;";
            string strExcel = string.Format("select * from [{0}$]", "sheet1");
            DataSet ds = new DataSet();
            using (OleDbConnection conn = new OleDbConnection(strConn))
            {
                conn.Open();
                OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn);
                adapter.Fill(ds, "sheet1");
                return ds.Tables["sheet1"];
            }
        }
        #endregion
    }