Asp.net 生成 导出 Excel 下载

Asp.net 生成 导出 Excel 下载

// 方法一：使用DCOM 生成Excel

private void export(HttpContext context)
{
string ret = "";

try
{
// 参数取得
string DOCNO = Operate.getParameter(context, "DOCNO");
string BASENO = Operate.getParameter(context, "BASENO");

NRSS.BLL.XMK_Z_GCYS_CPXX_FB bll = new NRSS.BLL.XMK_Z_GCYS_CPXX_FB();

DataSet dsFB = bll.GetListExt("DOCNO = '" + DOCNO + "'");
if (dsFB.Tables.Count <= 0 || dsFB.Tables[0].Rows.Count < 0)
{
throw new Exception("没有分布工程数据");
}

System.Data.DataTable dtFB = dsFB.Tables[0];

Microsoft.Office.Interop.Excel.Application appExcel = new Microsoft.Office.Interop.Excel.Application();
if (appExcel == null)
{
throw new Exception("Excel程序启动失败。");
}

// ------------ Excee 操作 -------------
appExcel.Visible = false;
appExcel.UserControl = true;
Object miss = Missing.Value;

if (appExcel.Workbooks.Count <= 0)
{
appExcel.Workbooks.Add(miss);
}

Microsoft.Office.Interop.Excel.Workbook workbook = appExcel.ActiveWorkbook;

string[] colTitleFB = { "ID", "预算单号", "分布工程编号", "分布工程名称", "排序", "数量", "说明", "备注" };
string[] colTitleQD = { "ID", "预算单号", "分布工程编号", "分布工程名称", "排序", "数量", "说明", "备注" };
string[] colTitleFX = { "ID", "预算单号", "分布工程编号", "分布工程名称", "排序", "数量", "说明", "备注" };
string[] colTitleXY = { "ID", "预算单号", "分布工程编号", "分布工程名称", "排序", "数量", "说明", "备注" };

int iRowsCntFB = dtFB.Rows.Count;
for (int i = 0; i < iRowsCntFB; i++)
{
DataRow drFB = dtFB.Rows[i];

Microsoft.Office.Interop.Excel.Worksheet wsheet = null;

wsheet = workbook.Worksheets.Add(miss, miss, miss, miss);

string FB_NO = drFB["FB_NO"].ToString();

wsheet.Name = FB_NO;
wsheet.Cells[1, 1] = "分布工程信息";

writeDataFB(wsheet, 2, drFB);

}

string date = DateTime.Now.ToString("yyyyMMddHHmmss");
string fileName = "工程预算_" + BASENO +"_"+ DOCNO + "_" + date + ".xls";

int FormatNum;
string Version;//excel版本号
Version = appExcel.Version;//获取你使用的excel 的版本号
if (Convert.ToDouble(Version) < 12)//You use Excel 97-2003
{
FormatNum = -4143;
}
else//you use excel 2007 or later
{
FormatNum = 56;
}

string strFullPath = context.Server.MapPath("~/temp_ckd/" + fileName);
workbook.SaveAs(strFullPath, FormatNum, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

appExcel.Quit();

excelReleaseObject(workbook);

excelReleaseObject(appExcel);

downloadExcel(context, fileName, strFullPath);
}
catch (Exception ex)
{
ret = Operate.getJSONResult("error", ex.Message);
}
}

private string getRowDataStr(DataRow dr, int col)
{
if (dr.IsNull(col))
{
return "";
}

if (dr[col] == null)
{
return "";
}

return dr[col].ToString();
}

private void excelReleaseObject(Object obj)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
}
private void downloadExcel(HttpContext context, string fileName, string strFullPath)
{
// 取得下载文件
string strFileName = fileName;

{
context.Response.Buffer = true;
context.Response.Clear();

context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
context.Response.ContentType = "application/ms-excel;charset=gb2312";

string downFile = System.IO.Path.GetFileName(strFileName);
string EncodeFileName = HttpUtility.UrlEncode(downFile, System.Text.Encoding.UTF8);
context.Response.AddHeader("Content-Disposition", "attachment;filename=" + EncodeFileName + ";");
context.Response.BinaryWrite(System.IO.File.ReadAllBytes(strFullPath));//返回文件数据给客户端下载
context.Response.Flush();

HttpContext.Current.ApplicationInstance.CompleteRequest();
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;

using System.Data.OleDb;
using System.Text;

namespace XXX.YYY
{
public class ExportExcelHelper
{
//  当 IMEX=0 时为“汇出模式”，这个模式开启的 Excel 档案只能用来做“写入”用途。
//  当 IMEX=1 时为“汇入模式”，这个模式开启的 Excel 档案只能用来做“读取”用途。
//  当 IMEX=2 时为“连結模式”，这个模式开启的 Excel 档案可同时支援“读取”与“写入”用途。
private const string CONNECTION_FORMAT = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=0\"";

public static void CreateSheet(string argPath, string argSheetName, string[] argColNames)
{
OleDbConnection OleDb_Conn = new OleDbConnection();

OleDb_Conn.ConnectionString = string.Format(CONNECTION_FORMAT, argPath);

try
{
OleDb_Conn.Open();
OleDbCommand OleDb_Comm = new OleDbCommand();

OleDb_Comm.Connection = OleDb_Conn;
string strCmd;

try
{
strCmd = "drop table [" + argSheetName + "]";
OleDb_Comm.CommandText = strCmd;
OleDb_Comm.ExecuteNonQuery();
}
catch{}

strCmd = "create Table [" + argSheetName + "](";

for (int i=0; i< argColNames.Length; i++)
{
strCmd += "["+argColNames[i]+"] TEXT,";
}

strCmd = strCmd.Trim().Substring(0, strCmd.Length - 1);//delete the last comma

strCmd += ")";

OleDb_Comm.CommandText = strCmd;
OleDb_Comm.ExecuteNonQuery();

OleDb_Conn.Close();
OleDb_Conn = null;
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (OleDb_Conn != null)
{
OleDb_Conn.Close();
OleDb_Conn = null;
}
}
}

public static void WriteSheetData(string argPath, string argSheetName, DataRow[] dtrows, string[] argColNames)
{
OleDbConnection OleDb_Conn = new OleDbConnection();

OleDb_Conn.ConnectionString = string.Format(CONNECTION_FORMAT, argPath);

StringBuilder CommText = new StringBuilder();

try
{
OleDb_Conn.Open();

int col = argColNames.Length;
foreach (DataRow dr in dtrows)
{
CommText.Append("INSERT INTO [" + argSheetName + "] VALUES(");
for (int i = 0; i < col; i++)
{
if (i + 1 == col)
{
CommText.Append("'" + ReplaceAll(dr[i].ToString()) + "'");
}
else
{
CommText.Append("'" + ReplaceAll(dr[i].ToString()) + "',");
}
}
CommText.Append(");");

using (OleDbCommand cmd = new OleDbCommand(CommText.ToString().Replace(':', ';').TrimEnd(';'), OleDb_Conn))
{
//导出数据
cmd.ExecuteNonQuery();

}
CommText.Remove(0, CommText.Length);
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (OleDb_Conn != null)
{
OleDb_Conn.Close();
OleDb_Conn = null;
}
}
}

private static string ReplaceAll(object val)
{
if (val == null)
{
return "";
}

return val.ToString();
}
}
}