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這篇文章主要介紹了ASP.NET之Excel下載模板、導(dǎo)入、導(dǎo)出操作的示例分析,具有一定借鑒價(jià)值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
1.下載模板功能
protected void btnDownload_Click(object sender, EventArgs e) { var path = Server.MapPath(("upfiles\\") + "test.xlt"); //upfiles-文件夾 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)); //頭信息,指定默認(rèn)文件名 Response.AddHeader("Content-Length", file.Length.ToString());//顯示下載進(jìn)度 Response.ContentType = "application/ms-excel"; // 指定返回的是一個(gè)不能被客戶端讀取的流,必須被下載 Response.WriteFile(file.FullName); // 把文件流發(fā)送到客戶端 HttpContext.Current.ApplicationInstance.CompleteRequest(); } catch (Exception ex) { Response.Write("<script>alert('錯(cuò)誤:" + ex.Message + ",請(qǐng)盡快與管理員聯(lián)系')</script>"); } }
2.導(dǎo)入數(shù)據(jù)
Excel數(shù)據(jù)導(dǎo)入到數(shù)據(jù)庫(kù)中。
protected void btnImport_Click(object sender, EventArgs e) { if (FileUpload1.HasFile == false) //判斷是否包含一個(gè)文件 { Response.Write("<script>alert('請(qǐng)您選擇Excel文件!')</script>");//未上傳就點(diǎn)擊了導(dǎo)入按鈕 return; } string isXls = Path.GetExtension(FileUpload1.FileName).ToString().ToLower();//獲得文件的擴(kuò)展名 var extenLen = isXls.Length; if (!isXls.Contains(".xls")) //判斷是否 是excel文件 { Response.Write("<script>alert('只可以選擇Excel文件!')</script>"); return; } string filename = FileUpload1.FileName; //獲取Excle文件名 string savePath = Server.MapPath(("upfiles\\") + filename);//Server.MapPath 獲得虛擬服務(wù)器相對(duì)路徑 string savePath3 = Server.MapPath(("upfiles\\")); if (!Directory.Exists(savePath3)) //如果不存在upfiles文件夾則創(chuàng)建 { Directory.CreateDirectory(savePath3); } FileUpload1.SaveAs(savePath); //SaveAs 將上傳的文件內(nèi)容保存在服務(wù)器上 var ds = ExcelSqlConnection(savePath, filename); //將Excel轉(zhuǎn)成DataSet var dtRows = ds.Tables[0].Rows.Count; var dt = ds.Tables[0]; if (dtRows == 0) { Response.Write("<script>alert('Excel表無(wú)數(shù)據(jù)!')</script>"); return; } try { for(int i = 0; i < dt.Rows.Count; i++) { string ve = dt.Rows[i]["車號(hào)"].ToString(); if (string.IsNullOrEmpty(ve)) //因數(shù)據(jù)庫(kù)中車號(hào)不能為空 所以表格中車號(hào)為空的跳過(guò)這行 { continue; } //用自己的方式保存進(jìn)數(shù)據(jù)庫(kù)ADO/EF/... var model = new TEST(); //實(shí)體 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數(shù)據(jù) IMEX=1可必免數(shù)據(jù)類型沖突 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.導(dǎo)出數(shù)據(jù)到Excel中
插件采用MyXLS.
以下代碼大部分基本不用改。
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");//狀態(tài)欄標(biāo)題名稱 org.in2bits.MyXls.Cells cells = sheet.Cells; #region 表頭 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列顯示TEST sheet.AddMergeArea(area); cellTitle.Font.Height = 20 * 20; cellTitle.Font.Bold = true;//設(shè)置標(biāo)題行的字體為粗體 cellTitle.Font.FontFamily = FontFamilies.Roman;//設(shè)置標(biāo)題行的字體為FontFamilies.Roman cellTitle.HorizontalAlignment = HorizontalAlignments.Centered; area = new MergeArea(2, 2, 1, 1); cellTitle = cells.AddValueCell(2, 1, "車號(hào)"); //第二行第一列 顯示車號(hào) 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(); //獲取數(shù)據(jù) for (int i = 0; i < list.Count; i++) { rowIndex++; cell = cells.AddValueCell(rowIndex, 1, list[i].VehicleNO); //車號(hào) 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.錯(cuò)誤-未在本地計(jì)算機(jī)上注冊(cè)“Microsoft.ACE.OLEDB.12.0”提供程序
01.將平臺(tái)換成X86
02.安裝 AccessDatabaseEngine.exe(點(diǎn)擊下載)
5.錯(cuò)誤-服務(wù)器無(wú)法在發(fā)送HTTP標(biāo)頭之后設(shè)置內(nèi)容類型
給導(dǎo)出按鈕增加'全局刷新'的能力。本文例子是aspx做的在<asp:UpdatePanel> 標(biāo)簽中 增加如下代碼即可
<Triggers> <%--<asp:AsyncPostBackTrigger ControlID="" />--%> <%--局部刷新 值刷新UpdatePanel內(nèi)部 --%> <asp:PostBackTrigger ControlID="btnExport" /> <%--全部刷新 --%> <%--2016年7月1日 解決點(diǎn)擊導(dǎo)出按鈕報(bào)錯(cuò)“服務(wù)器無(wú)法在發(fā)送HTTP標(biāo)頭之后設(shè)置內(nèi)容類型”的錯(cuò)誤--%> </Triggers>
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