1．功能：
1)导入excel文件内容：
2)导出excel.txt文件：
3)导出excel.html文本文件：
2.源程序如下：
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;using System.Data.OleDb; using System.IO;namespace WindowsFormsApplication3{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } public DataSet ReadExcel(string path) { string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + @path + ";" + "Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn); conn.Open(); string strExcel = ""; OleDbDataAdapter myCommand = null; DataSet ds = null; strExcel = "select 班级,学号,姓名,类别,作业网址 from [sheet1$]"; myCommand = new OleDbDataAdapter(strExcel, strConn); DataTable table1 = new DataTable(); ds = new DataSet(); myCommand.Fill(table1); myCommand.Fill(ds); dataGridView1.DataSource = table1; return ds; } private void button1_Click(object sender, EventArgs e) { OpenFileDialog openfile = new OpenFileDialog(); openfile.Filter = "工作薄(*.xls)|*.xls|所有文件(*.*)|*.*|工作薄(*.xlsx)|*.xlsx"; if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK) { DataSet dataSet = ReadExcel(openfile.FileName); String name = ""; using (StreamWriter sw = new StreamWriter(@"C:\Users\Administrator.LBDZ-20121019BZ\Documents\学习\C#\3\excel.txt", false, Encoding.Default)) { foreach (DataTable table in dataSet.Tables) { foreach (DataRow row in table.Rows) { foreach (DataColumn column in table.Columns) { //Console.WriteLine(row[column]); if (column.ColumnName == "姓名") { name = row[column].ToString(); } if (column.ColumnName == "作业网址") { sw.WriteLine(name + ":" + row[column].ToString() + ";"); } } } } } using (StreamWriter sw = new StreamWriter(@"C:\Users\Administrator.LBDZ-20121019BZ\Documents\学习\C#\3\excel.html", false, Encoding.Default)) { sw.WriteLine(""); sw.WriteLine(""); sw.WriteLine("| " + name + " | "); } if (column.ColumnName == "作业网址") { sw.WriteLine("" + "" + row[column].ToString() + ""); sw.WriteLine(" | "); sw.WriteLine("
3.运行结果：
