本文介绍了ASP.NET下Excel下载模板、导入、导出操作，供大家参考，具体内容如下

1.下载模板功能

protected void btnDownload_Click(object sender, EventArgs e){ var path = Server.MapPath(("upfiles\\") + "test.xlt"); //upfiles-文件夹 test.xlt-文件 var name = "test.xlt"; try { var file = new FileInfo(path); Response.Clear(); Response.Charset = "GB2312"; Response.ContentEncoding = System.Text.Encoding.UTF8; Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(name)); //头信息，指定默认文件名 Response.AddHeader("Content-Length", file.Length.ToString());//显示下载进度 Response.ContentType = "application/ms-excel"; // 指定返回的是一个不能被客户端读取的流，必须被下载 Response.WriteFile(file.FullName); // 把文件流发送到客户端 HttpContext.Current.ApplicationInstance.CompleteRequest(); } catch (Exception ex) { Response.Write("<script>alert('错误:" + ex.Message + ",请尽快与管理员联系')</script>"); }}

2.导入数据
Excel数据导入到数据库中。

protected void btnImport_Click(object sender, EventArgs e){ if (FileUpload1.HasFile == false) //判断是否包含一个文件 { Response.Write("<script>alert('请您选择Excel文件！')</script>");//未上传就点击了导入按钮 return; } string isXls = Path.GetExtension(FileUpload1.FileName).ToString().ToLower();//获得文件的扩展名 var extenLen = isXls.Length; if (!isXls.Contains(".xls")) //判断是否 是excel文件 { Response.Write("<script>alert('只可以选择Excel文件！')</script>"); return; } string filename = FileUpload1.FileName; //获取Excle文件名 string savePath = Server.MapPath(("upfiles\\") + filename);//Server.MapPath 获得虚拟服务器相对路径 string savePath2 = Server.MapPath(("upfiles\\")); if (!Directory.Exists(savePath2)) //如果不存在upfiles文件夹则创建 { Directory.CreateDirectory(savePath2); } FileUpload1.SaveAs(savePath); //SaveAs 将上传的文件内容保存在服务器上 var ds = ExcelSqlConnection(savePath, filename); //将Excel转成DataSet var dtRows = ds.Tables[0].Rows.Count; var dt = ds.Tables[0]; if (dtRows == 0) { Response.Write("<script>alert('Excel表无数据！')</script>"); return; } try { for(int i = 0; i < dt.Rows.Count; i++) { string ve = dt.Rows[i]["车号"].ToString(); if (string.IsNullOrEmpty(ve)) //因数据库中车号不能为空 所以表格中车号为空的跳过这行 { continue; } //用自己的方式保存进数据库ADO/EF/... var model = new TEST(); //实体 model.id = 1; model.ve = ve; model.name = dt.Rows[i]["姓名"].ToString(); model.Update(); } }catch (Exception ex) { Response.Write("<script>alert('" + ex.Message + "')</script>"); } }private DataSet ExcelSqlConnection(string savePath, string tableName){ //string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + savePath + ";Extended Properties='Excel 8.0;HDR=YES;IMEX=1'"; string strCon = "Provider=Microsoft.Ace.OLEDB.12.0;" + "data source=" + savePath + ";Extended Properties='Excel 12.0; HDR=Yes; IMEX=1'"; //HDR=YES Excel文件的第一行是列名而不是数据 IMEX=1可必免数据类型冲突 var excelConn = new OleDbConnection(strCon); try { string strCom = string.Format("SELECT * FROM [Sheet1$]"); excelConn.Open(); OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, excelConn); DataSet ds = new DataSet(); myCommand.Fill(ds, "[" + tableName + "$]"); excelConn.Close(); return ds; } catch (Exception) { excelConn.Close(); //Response.Write("<script>alert('" + ex.Message + "')</script>"); return null; }}

3.导出数据到Excel中
插件采用MyXLS.
以下代码大部分基本不用改。

private void Export(){ XlsDocument xls = new XlsDocument(); org.in2bits.MyXls.Cell cell; int rowIndex = 2; xls.FileName = DateTime.Now.ToString().Replace("-", "").Replace(":", "").Replace(" ", "") + HttpUtility.UrlEncode("TEST") + ".xls"; //TEST要改 Worksheet sheet = xls.Workbook.Worksheets.AddNamed("TEST");//状态栏标题名称 org.in2bits.MyXls.Cells cells = sheet.Cells; #region 表头 MergeArea area = new MergeArea(1, 1, 1, 2); //MergeArea(int rowMin, int rowMax, int colMin, int colMax) org.in2bits.MyXls.Cell cellTitle = cells.AddValueCell(1, 1, "TEST"); //Excel 第一行第1到2列显示TEST sheet.AddMergeArea(area); cellTitle.Font.Height = 20 * 20; cellTitle.Font.Bold = true;//设置标题行的字体为粗体 cellTitle.Font.FontFamily = FontFamilies.Roman;//设置标题行的字体为FontFamilies.Roman cellTitle.HorizontalAlignment = HorizontalAlignments.Centered; area = new MergeArea(2, 2, 1, 1); cellTitle = cells.AddValueCell(2, 1, "车号"); //第二行第一列 显示车号 sheet.AddMergeArea(area); cellTitle.Font.Bold = true; cellTitle.Font.Height = 16 * 16; cellTitle.Font.FontFamily = FontFamilies.Roman; cellTitle.HorizontalAlignment = HorizontalAlignments.Centered; cellTitle.VerticalAlignment = VerticalAlignments.Centered; cellTitle.TopLineStyle = 1; cellTitle.BottomLineStyle = 1; cellTitle.LeftLineStyle = 1; cellTitle.RightLineStyle = 1; area = new MergeArea(2, 2, 2, 2); cellTitle = cells.AddValueCell(2, 2, "姓名"); sheet.AddMergeArea(area); cellTitle.Font.Bold = true; cellTitle.Font.Height = 16 * 16; cellTitle.Font.FontFamily = FontFamilies.Roman; cellTitle.HorizontalAlignment = HorizontalAlignments.Centered; cellTitle.VerticalAlignment = VerticalAlignments.Centered; cellTitle.TopLineStyle = 1; cellTitle.BottomLineStyle = 1; cellTitle.LeftLineStyle = 1; cellTitle.RightLineStyle = 1; #endregion var list = GetList(); //获取数据 for (int i = 0; i < list.Count; i++) { rowIndex++; cell = cells.AddValueCell(rowIndex, 1, list[i].VehicleNO); //车号 cell.TopLineStyle = 1; cell.BottomLineStyle = 1; cell.LeftLineStyle = 1; cell.RightLineStyle = 1; cell = cells.AddValueCell(rowIndex, 2, list[i].Name); //姓名 cell.TopLineStyle = 1; cell.BottomLineStyle = 1; cell.LeftLineStyle = 1; cell.RightLineStyle = 1; } xls.Send();}

4.错误-未在本地计算机上注册“Microsoft.ACE.OLEDB.12.0”提供程序
01.将平台换成X86
02.安装 AccessDatabaseEngine.exe(点击下载)

5.错误-服务器无法在发送HTTP标头之后设置内容类型
给导出按钮增加'全局刷新'的能力。本文例子是aspx做的在<asp:UpdatePanel> 标签中 增加如下代码即可
复制代码 代码如下:<Triggers>
<%--<asp:AsyncPostBackTrigger ControlID="" />--%> <%--局部刷新 值刷新UpdatePanel内部 --%>
<asp:PostBackTrigger ControlID="btnExport" /> <%--全部刷新 --%> <%--2016年7月1日 解决点击导出按钮报错“服务器无法在发送HTTP标头之后设置内容类型”的错误--%>
</Triggers>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。