/// <summary>/// 导出Excel文件，并自定义文件名/// </summary>/// <param name="dtData">数据源</param>/// <param name="FileName">导出文件名称</param>/// <param name="numberformat">需要处理科学计数法的列的下标</param>public static void DataTable3Excel(DataTable dtData, String FileName,string numberformat){GridView dgExport = null;HttpContext curContext = HttpContext.Current;StringWriter strWriter = null;HtmlTextWriter htmlWriter = null;if (dtData != null){curContext.Response.Clear();HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);curContext.Response.AddHeader("content-disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls\"");curContext.Response.ContentType = "application/vnd.ms-excel";curContext.Response.Charset = "utf-8";curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");strWriter = new StringWriter();htmlWriter = new HtmlTextWriter(strWriter);dgExport = new GridView();dgExport.DataSource = dtData.DefaultView;dgExport.AllowPaging = false;dgExport.DataBind();//判断是否存在需要处理科学计数法的列，存在则进行相对应的列的处理，处理为“以文本形式存储的数字”if(numberformat!=""){string[] arraystr = numberformat.Split(',');foreach (GridViewRow dg in dgExport.Rows){for (int i = 0; i < arraystr.Length; i++){dg.Cells[Convert.ToInt32(arraystr[i])].Attributes.Add("style", "vnd.ms-excel.numberformat: @;");}}}dgExport.RenderControl(htmlWriter);curContext.Response.Write("<meta http-equiv=\"content-type\" content=\"application/vnd.ms-excel; charset=utf-8\"/>" + strWriter.ToString());curContext.Response.End();}}