.net 导入Excel 2003版

using System.Data.OleDb;

using System.IO;

.aspx 代码

  <td colspan="5" align="right">
                <input id="upWOLost" runat="server" type="file" />
            </td>
            <td>
                <asp:Button ID="btnupfile" runat="server" Text="导入" CssClass="button_green" OnClick="btnupfile_Click" />
            </td>

.CS代码

   protected void btnupfile_Click(object sender, EventArgs e)
        {
               

 if (upWOLost.PostedFile.FileName == "")
        {

            Common.Lib.MessageBox.Show(this.Page, "请选择EXCEL文件");
            return;
        }

        string filePath = upWOLost.PostedFile.FileName;//输入到upFile的所有字符，包括文件路径和文件名、文件扩展名  
        string fileName = Path.GetFileName(filePath);
        string fileExtension = Path.GetExtension(fileName);

        if (fileExtension.ToLower() != ".xls" && fileExtension.ToLower() != ".xlsx")
        {
            Common.Lib.MessageBox.Show(this.Page, "文件类型错误，请选择文件格式为[xls]或[xlsx]的文件!");
            return;
        }

        #region=========上传导入文件到服务器==========

        string rootPath = Server.MapPath("../UserFiles");
        //注意：可能要修改你的文件夹的匿名写入权限。
        string newFileName = DateTime.Now.Year.ToString()
            + DateTime.Now.Month.ToString()
            + DateTime.Now.Day.ToString()
            + DateTime.Now.Hour.ToString()
            + DateTime.Now.Minute.ToString()
            + DateTime.Now.Second.ToString()
            + DateTime.Now.Millisecond.ToString()
            + fileExtension;
        upWOLost.PostedFile.SaveAs(rootPath + @"\" + newFileName);

        #endregion

        #region==========获取EXCEL数据并删除Excel文件============
        //string sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;"
        //            + "Data Source=" + rootPath + "\\" + newFileName + ";"
        //            + "Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"";
        //string sConnectionString = "Provider=Microsoft.ace.oledb.12.0;Data Source=" + rootPath
        //    + "\\" + newFileName + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'";

        string sConnectionString = "";
        if (fileExtension.ToLower() == ".xls")
        {
            sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;"
                       + "Data Source=" + rootPath + "\\" + newFileName + ";"
                       + "Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"";
        }
        if (fileExtension.ToLower() == ".xlsx")
        {
            sConnectionString = "Provider=Microsoft.ace.oledb.12.0;Data Source=" + rootPath
                 + "\\" + newFileName + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'";
        }

        //建立EXCEL的连接
        OleDbConnection objConn = new OleDbConnection(sConnectionString);
        objConn.Open();
        OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM [Sheet1＄]", objConn);
        OleDbDataAdapter objAdapter = new OleDbDataAdapter();
        objAdapter.SelectCommand = objCmdSelect;
        DataSet objDataset = new DataSet();

        objAdapter.Fill(objDataset, "XLData");
        objConn.Close();//关闭EXCEL的连接

        //刪除文件
        System.IO.FileInfo file = new System.IO.FileInfo(rootPath + "\\" + newFileName);
        if (file.Exists)
        {
            file.Delete();
        }

        DataTable dt = objDataset.Tables[0];
        if (dt.Rows.Count == 0)
        {
            Common.Lib.MessageBox.Show(this.Page, "错误：无导入数据!");
            return;
        }

        }