关于导出excel 把一个dataset的多个datatable导入到一个excel的多个sheet中

几经查询资料，我完成了这个看似结果还不错的任务，在解决任务的过程也也遇到了很多的问题，但最后胜利的成果还是要和大家分享一下，

大家看看有没有什么问题，多提提意见，有更好的可以给我看看，我需要。

代码如下

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using HCK.BLL;
using HCK.Model;
using Microsoft.Office.Interop.Excel;
using System.IO;
using System.Reflection;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Collections.Generic;

中间省略

/// <summary)
/// 导出excel
/// </summary>
/// <param name="ds"></param>
/// <param name="tableNames"></param>
/// <param name="FileName"></param>
public void doExport(DataSet ds, string[] tableNames, string FileName)
{
string path = "";
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
try
{
excel.Visible = false;
//设置禁止弹出保存和覆盖的询问提示框
excel.DisplayAlerts = false;
excel.AlertBeforeOverwriting = false;

//增加一个工作簿
Workbook book = excel.Workbooks.Add(true);
//添加工作表
Worksheet sheets = (Microsoft.Office.Interop.Excel.Worksheet)
book.Worksheets.Add(Missing.Value, Missing.Value, 9, Microsoft.Office.Interop.Excel.XlSheetType.xlWorksheet);

for (int i = 0; i <ds.Tables.Count; i++)
{
System.Data.DataTable table = ds.Tables[i];
//获取一个工作表
Worksheet sheet = book.Worksheets[i + 1] as Worksheet;
int rowIndex = 1;
int colIndex = 0;

foreach (DataColumn col in table.Columns)
{
colIndex++;
sheet.Cells[1, colIndex] = col.ColumnName;
}
foreach (DataRow row in table.Rows)
{
rowIndex++;
colIndex = 0;
foreach (DataColumn col in table.Columns)
{
colIndex++;
//sheet.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString();
//在这里要在数字前加前单引号
String typeName = row[col.ColumnName].GetType().ToString();
sheet.Cells[rowIndex, colIndex] = typeCheckAdd(row[col.ColumnName].ToString(), typeName);
}
}
sheet.Name = tableNames[i];
}

path = Server.MapPath("../") + @"excel/" + FileName + ".xls";
Page.ClientScript.RegisterStartupScript(this.GetType(), "abc", "alert('" + path + "')", true);
//book.Save();
book.SaveAs(path, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);
//excel.Save(strExcelFileName);

}
catch (Exception err)
{
string mess = err.Message.ToString();
Page.ClientScript.RegisterStartupScript(this.GetType(), "abc", "alert('" + mess + "')", true);
}
finally
{
excel.Quit();
//excel = null;
IntPtr t = new IntPtr(excel.Hwnd); //得到这个句柄，具体作用是得到这块内存入口
int k = 0;
GetWindowThreadProcessId(t, out k); //得到本进程唯一标志k
System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k); //得到对进程k的引用
p.Kill();
GC.Collect();
}

System.IO.FileInfo file = new System.IO.FileInfo(path);
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(file.Name));
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/ms-excel";
Response.WriteFile(file.FullName);
Response.End();
//System.IO.FileInfo deletefile = new FileInfo(path);//删除生成的文件
//if (deletefile.Exists)
//{
// deletefile.Delete();
//}
}
[DllImport("User32.dll", CharSet = CharSet.Auto)]
public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);
//若是大数需加前导引号变成字符串
public String typeCheckAdd(String cellContent, String strType)
{
String cellContentAdd;
switch (strType)
{
case "System.String":
cellContentAdd = "'" + cellContent;
break;
default:
cellContentAdd = cellContent;
break;

}
return cellContentAdd;
}

思路大概就是先把生成的excel生成到项目中，然后下载到客户端，本想着把项目中的excel删除，没有成功，想着反正也没有很多，一直都是一个，也就没有管它了。 对与那个关于excel.exe进程也查了一些资料，成功了，不知道是否理想。大家多多提提意见。