导入导出Excel点滴

        #region 输出Excel

        protected void ExcelOutput(System.Web.UI.WebControls.DataGrid dg,System.Data.DataTable dt)
        {
                Response.Clear();
            Response.Buffer= true;
            Response.ContentType = "application/vnd.ms-excel";
            Response.Charset = "gb2312";
            Response.AppendHeader("Content-Disposition","attachment;filename=FXYDAKK.xls");
            Response.ContentEncoding=System.Text.Encoding.GetEncoding("gb2312");

            //this.EnableViewState = false;

            System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
            //
            dg.DataSource = dt;
            dg.DataBind();

            dg.RenderControl(oHtmlTextWriter);
            Response.Write(oStringWriter.ToString());
            Response.End();    
        }


        protected void ExcelOutput(System.Web.UI.WebControls.DataGrid dg,
                                    System.Data.DataTable dt,
                                    string Encoding,
                                    string excelfilename)
        {
            Response.Clear();
            Response.Buffer= true;
            Response.ContentType = "application/vnd.ms-excel";
            Response.Charset = Encoding;
            Response.AppendHeader("Content-Disposition","attachment;filename="+excelfilename);
            Response.ContentEncoding=System.Text.Encoding.GetEncoding(Encoding);

            //this.EnableViewState = false;

            System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
            //
            dg.DataSource = dt;
            dg.DataBind();

            dg.RenderControl(oHtmlTextWriter);
            Response.Write(oStringWriter.ToString());
            Response.End();    
        }



        #endregion

        #region 导入Excel
        public DataTable ExcelInput(string sourcePath,
                                    string SheetName)
        {

            System.Data.DataTable dt = new System.Data.DataTable();

            OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+sourcePath+";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"");
            OleDbCommand cmd = new OleDbCommand("SELECT * FROM ["+SheetName+"$]", conn);
            OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);
            DataTable table = new DataTable();
            adapter.Fill(dt);
            return dt;
        }
        #endregion