基于asp.net的excel导入导出

新建aspx文件、代码大概如下：

<!--导入Excel文件-->
<table width="99%" border="0" align="center" cellpadding="0" id="searchtable" cellspacing="0" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF">
<table width="100%" border="0" cellpadding="2" cellspacing="1" bgcolor="#CCCCCC"
class="table">
<tr class="table-item">
<td width="12%" height="20" bgcolor="#E7E7E7" align="center">
<asp:Button ID="btn_ExportReceivable" Text="导出Excel" OnClick="btn_excel_Click1" runat="server"/>
</td>
<td width="48%" bgcolor="#FFFFFF">
<input id="fileExportExcelReceivable" style="width:100%" type="file"  runat="server"/>
</td>
<td width="10%" bgcolor="#E7E7E7" align="center">
<asp:Button ID="btn_excelReceivable"  Visible="true" Text="导入Excel" OnClick="btn_excel_Click2" runat="server"/>
</td>
</tr>
</table>
</td>
</tr>
</table>
<!--导入结束-->

aspx.cs中代码如下：

using NPOI.HSSF.UserModel;
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using XBase.Model.Office.PurchaseManager;
using XBase.Common;
using XBase.Business.Office.PurchaseManager;
using System.Collections.Generic;
using System.Data.OleDb;
using System.IO;
using System.Data;

public partial class Pages_Office_FinanceManager_ReceivablePayable : System.Web.UI.Page
{

HSSFWorkbook hssfworkbook;

protected void Page_Load(object sender, EventArgs e)
{

}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void btn_excel_Click1(object sender, EventArgs e)
{
XBase.Model.Office.SellReport.AccountsRP AccountsRP = new XBase.Model.Office.SellReport.AccountsRP();
DataTable dt = XBase.Business.Office.PurchaseManager.PurchaseOrderBus.GetAccountsRP();
OutputToExecl.ExportToTableFormat(this, dt,
new string[] { "订单编号", "类型", "供应商", "发票号", "应付金额", "已付金额", "付款金额" },
new string[] { "SalesOrderNo", "type", "CustName", "InvoiceNum", "ComSendMoney", "ReceivedPrepaid", "fk" }, "应付报表");
}

protected void btn_excel_Click2(object sender, EventArgs e)
{
string strcompanycd = ((UserInfoUtil)SessionUtil.Session["UserInfo"]).CompanyCD;
string struid = ((UserInfoUtil)SessionUtil.Session["UserInfo"]).EmployeeNum;
try
{
/*文件名*/
string FileName = string.Empty;
/*上传后完整的文件路径包含文件名*/
string FileNewUrl = string.Empty;

#region 上传验证
/*获取公司的上传路径*/
string FileUrl = XBase.Business.Office.SupplyChain.ProductInfoBus.GetCompanyUpFilePath(strcompanycd);

/*验证该公司路径是否存在 不存在则创建*/
DirectoryInfo dir = new DirectoryInfo(FileUrl);
if (!dir.Exists)
{
try
{
dir.Create();
}
catch (Exception ex)
{
this.lbl_resultReceivable.Text = ex.ToString();
return;
}
}

/*验证是否选择了文件*/
if (string.IsNullOrEmpty(fileExportExcelReceivable.PostedFile.FileName))
{
this.lbl_resultReceivable.Text = "请选择需要导入的Excel文件";
return;
}

/*验证文件类型*/
string FileExtension = fileExportExcelReceivable.PostedFile.FileName.Split('.')[1].ToUpper();
if (FileExtension != "XLS" && FileExtension != "XLSX")
ErrorMsg += "文件错误，请上传正确的Excel文件\\n";

/*判断是否存在异常*/
if (!string.IsNullOrEmpty(ErrorMsg))
{
this.lbl_resultReceivable.Text = ErrorMsg;
return;
}

/*上传文件*/
string strID = Guid.NewGuid().ToString();
FileName = strID + "." + FileExtension.ToLower();
FileNewUrl = FileUrl + "\\" + FileName;
try
{
fileExportExcelReceivable.PostedFile.SaveAs(FileNewUrl);
}
catch (Exception ex)
{
this.lbl_resultReceivable.Text = ex.ToString();
}
#endregion

DataSet ds = ToDataTable(FileNewUrl);

foreach (DataRow dr in ds.Tables["应付报表$"].Rows)
{
try
{
string[] listADD = new string[1];
string order = dr[0].ToString();
int money = int.Parse(dr[6].ToString());
string sql = @"UPDATE officedba.AccountsRP SET ReceivedPrepaid = (SELECT ReceivedPrepaid+" + money + " FROM officedba.AccountsRP where SalesOrderNo='" + order + "') WHERE SalesOrderNo='" + order + "'";
listADD[0] = sql;
XBase.Business.Office.SellManager.SellSendBus.UpdatestrSql(listADD);
}
catch (Exception ex)
{
continue;
}
}
}
catch (Exception ex)
{
this.lbl_resultReceivable.Text = "导入失败" + ex.ToString();
return;
}
}

public static DataSet ToDataTable(string filePath)
{

string connStr = "";

string fileType = System.IO.Path.GetExtension(filePath);

if (string.IsNullOrEmpty(fileType)) return null;

if (fileType == ".xls")

connStr = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + filePath + ";" + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"";

else

connStr = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + filePath + ";" + ";Extended Properties=\"Excel 12.0;HDR=YES;IMEX=1\"";

string sql_F = "Select * FROM [{0}]";

OleDbConnection conn = null;

OleDbDataAdapter da = null;

DataTable dtSheetName = null;

DataSet ds = new DataSet();

try
{

// 初始化连接，并打开

conn = new OleDbConnection(connStr);

conn.Open();

// 获取数据源的表定义元数据

string SheetName = "";

dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });

// 初始化适配器

da = new OleDbDataAdapter();

for (int i = 0; i < dtSheetName.Rows.Count; i++)
{

SheetName = (string)dtSheetName.Rows[i]["TABLE_NAME"];

if (!SheetName.Contains("$") && !SheetName.Replace("'", "").EndsWith("$"))
{

continue;

}
//sql_F = "Select * FROM [{0}] ";
if (SheetName.Contains("应付报表$"))
{
sql_F = "Select * FROM [{0}] where F3 <> '' and F6 <> '已付金额' ";
}

da.SelectCommand = new OleDbCommand(String.Format(sql_F, SheetName), conn);

DataSet dsItem = new DataSet();

da.Fill(dsItem, SheetName);

ds.Tables.Add(dsItem.Tables[0].Copy());

}

}

catch (Exception ex)
{

}

finally
{

// 关闭连接

if (conn.State == ConnectionState.Open)
{

conn.Close();

da.Dispose();

conn.Dispose();

}

}

return ds;

}
}

查询数据的sql语句：
SELECT
a.SalesOrderNo,
CASE a.ExtField1
WHEN 1 THEN '采购'
WHEN 2 THEN '销售'
ELSE '委外'
END AS type,
b.CustName,
a.InvoiceNum,
a.ComSendMoney,
a.ReceivedPrepaid,
isnull(null,0) as fk
FROM officedba.AccountsRP a ,officedba.ProviderInfo b
WHERE a.IsAll = 1 and a.Dept=b.ID and a.Status=1