本文介紹了ASP.NET下Excel下載模板、導(dǎo)入、導(dǎo)出操作，供大家參考，具體內(nèi)容如下
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)器相對路徑
string savePath2 = Server.MapPath(("upfiles\\"));
if (!Directory.Exists(savePath2)) //如果不存在upfiles文件夾則創(chuàng)建
{
Directory.CreateDirectory(savePath2);
}
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表無數(shù)據(jù)！')</script>");
return;
}
try
{
for(int i = 0; i < dt.Rows.Count; i++)
{
string ve = dt.Rows[i]["車號"].ToString();
if (string.IsNullOrEmpty(ve)) //因數(shù)據(jù)庫中車號不能為空 所以表格中車號為空的跳過這行
{
continue;
}
//用自己的方式保存進(jìn)數(shù)據(jù)庫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"); //第二行第一列 顯示車號
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
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“Microsoft.ACE.OLEDB.12.0”提供程序
01.將平臺換成X86
02.安裝 AccessDatabaseEngine.exe(點(diǎn)擊下載)
5.錯(cuò)誤-服務(wù)器無法在發(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
代碼如下:
<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)器無法在發(fā)送HTTP標(biāo)頭之后設(shè)置內(nèi)容類型”的錯(cuò)誤--%>
</Triggers>
以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助