今天就跟大家聊聊有关如何在ASP.NET在对Excel文件进行上传，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
前台代码：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>导入EXCEL，生成DataTable</title>
<script src="../../Themes/Scripts/jquery-1.8.2.min.js"></script>
<link href="/Themes/Styles/Site.css" rel="external nofollow" rel="stylesheet" type="text/css" />
<script src="/Themes/Scripts/FunctionJS.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#Import").click(function () {
var filename = $("#FileUpload1").val();
if (filename == '') {
alert('请选择上传的EXCEL文件');
return false;
}
else {
var exec = (/[.]/.exec(filename)) ? /[^.]+$/.exec(filename.toLowerCase()) : '';
if (!(exec == "xlsx" || exec == "xls")) {
alert("文件格式不对，请上传Excel文件!");
return false;
}
}
return true;
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="FileUpload1" runat="server" /><asp:Button ID="Import" runat="server" Text="导入" OnClick="ImpClick" />
</div>
</form>
</body>
</html>后台代码；
protected void ImpClick(object sender, EventArgs e)
{
try
{
#region 校验
var fileName = this.FileUpload1.FileName;
if (string.IsNullOrWhiteSpace(fileName))
{
//提示信息
ShowMsgHelper.Alert("请选择上传Excel文件");
return;
}
//获取上传文件扩展名称
if (!(fileName.IndexOf(".xlsx") > 0 || fileName.IndexOf(".xls") > 0))
{
ShowMsgHelper.Alert("上传文件格式不正确，请核对！");
return;
}
#endregion
#region 将Excel文件上传到服务器上临时文件夹中
//临时文件夹，根目录下/Upload/tmp/，根据自己配置选择
string path = Server.MapPath("~/") + "Upload\\tmp\\";
string retStr=UploadHelper.FileUpload(path, this.FileUpload1);
if (!retStr.Equals("上传成功")) {
ShowMsgHelper.Alert(retStr);
return;
}
#endregion
#region 读取Excel文件第一个表获取内容并转换成DataTable,删除临时文件，也可以自己加时间戳，维护处理
DataTable dt = this.ExcelToDataTable(path + this.FileUpload1.FileName, true);
if (dt == null) {
ShowMsgHelper.Alert_Error("获取失败");
return;
}
//示例：获取dt中的值
string test = dt.Rows[0]["name"].ToString();
string test2 = dt.Rows[1]["class"].ToString();
//删除临时文件
DirFileHelper.DeleteFile("Upload\\tmp\\" + fileName);
#endregion
}
catch (Exception ex) {
throw ex;
}
}
/// <summary>
/// 将excel导入到datatable
/// </summary>
/// <param name="filePath">excel路径</param>
/// <param name="isColumnName">第一行是否是列名</param>
/// <returns>返回datatable</returns>
public DataTable ExcelToDataTable(string filePath, bool isColumnName)
{
DataTable dataTable = null;
FileStream fs = null;
DataColumn column = null;
DataRow dataRow = null;
IWorkbook workbook = null;
ISheet sheet = null;
IRow row = null;
ICell cell = null;
int startRow = 0;
try
{
using (fs = File.OpenRead(filePath))
{
// 2007版本
if (filePath.IndexOf(".xlsx") > 0)
workbook = new XSSFWorkbook(fs);
// 2003版本
else if (filePath.IndexOf(".xls") > 0)
workbook = new HSSFWorkbook(fs);
if (workbook != null)
{
sheet = workbook.GetSheetAt(0);//读取第一个sheet，当然也可以循环读取每个sheet
dataTable = new DataTable();
if (sheet != null)
{
int rowCount = sheet.LastRowNum;//总行数
if (rowCount > 0)
{
IRow firstRow = sheet.GetRow(0);//第一行
int cellCount = firstRow.LastCellNum;//列数
//构建datatable的列
if (isColumnName)
{
startRow = 1;//如果第一行是列名，则从第二行开始读取
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
cell = firstRow.GetCell(i);
if (cell != null)
{
if (cell.StringCellValue != null)
{
column = new DataColumn(cell.StringCellValue);
dataTable.Columns.Add(column);
}
}
}
}
else
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
column = new DataColumn("column" + (i + 1));
dataTable.Columns.Add(column);
}
}
//填充行
for (int i = startRow; i <= rowCount; ++i)
{
row = sheet.GetRow(i);
if (row == null) continue;
dataRow = dataTable.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
cell = row.GetCell(j);
if (cell == null)
{
dataRow[j] = "";
}
else
{
//CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,)
switch (cell.CellType)
{
case CellType.Blank:
dataRow[j] = "";
break;
case CellType.Numeric:
short format = cell.CellStyle.DataFormat;
//对时间格式（2015.12.5、2015/12/5、2015-12-5等）的处理
if (format == 14 || format == 31 || format == 57 || format == 58)
dataRow[j] = cell.DateCellValue;
else dataRow[j] = cell.NumericCellValue;
break;
case CellType.String:
dataRow[j] = cell.StringCellValue;
break;
}
}
}
dataTable.Rows.Add(dataRow);
}
}
}
}
}
return dataTable;
}
catch (Exception)
{
if (fs != null)
{
fs.Close();
}
return null;
}
}看完上述内容，你们对如何在ASP.NET在对Excel文件进行上传有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注亿速云行业资讯频道，感谢大家的支持。
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