如何将一个xls文件转换成XML文件

如何将一个xls文件转换成XML文件???

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用sql读进来，通过dataset转成xml即可

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我觉的需要读取xls，然后重新生产xml文件

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C# code:
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.IO;
using Microsoft.Office.Interop.Excel;
namespace TestAccess
{
class Program
{
static void Main(string[] args)
{

string strConnection = "Provider=Microsoft.ACE.OLEDB.12.0;";
strConnection += @"Data Source=C:\Documents and Settings\v-changl\My Documents\couse.xlsx;";
strConnection += "Extended Properties=\"Excel 12.0 Xml;HDR=YES\";";
OleDbConnection objConnection = new OleDbConnection(strConnection);
objConnection.Open();
OleDbDataAdapter myCommandd = new OleDbDataAdapter("select * from [Sheet1$]", objConnection);
DataSet ds = new DataSet();
myCommandd.Fill(ds, "[Sheet1$]");
System.Data.DataTable dt = ds.Tables["[Sheet1$]"];
Console.WriteLine(dt.Columns[0].ToString());
Console.WriteLine(dt.Columns[1].ToString());
DataRow drDisplay = dt.Rows[0];
int[] num = new int[dt.Columns.Count];
fo