c#第三次作业

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;

using System.Data.SqlClient;

namespace Excel

{

public partial class Form1 : Form

{

//全局变量,文件全路径

private string stFilePath = string.Empty;

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

DataTable myT = ExcelToDataTable("D:/ex03_demo.xls", "sheet1");

String mystr = myT.Rows[0][0].ToString();

//用listview1显示打开的excel

this.listView1.GridLines = true;//显示表格线

this.listView1.View = View.Details;//列表显示方式

this.listView1.Scrollable = true;//有滚动条

listView1.FullRowSelect = true;//是否选中整行

//设置表头

for (int i = 0; i < 9; i++)

{

this.listView1.Columns.Add("lie" + i, myT.Rows[0][i].ToString());

}

//设置表的内容

for (int j = 1; j < 47; j++)

{

ListViewItem item = new ListViewItem();

item.SubItems.Clear();

item.SubItems[0].Text = myT.Rows[j][0].ToString();

for (int k = 1; k < 9; k++)

{

item.SubItems.Add(myT.Rows[j][k].ToString());

}

listView1.Items.Add(item);

}

//自适应宽度，-1根据内容设置宽度，-2根据标题设置宽度

for (int i = 0; i < 9; i++)

{

listView1.Columns["lie" + i].Width = -1;

listView1.Columns["lie" + i].Width = -2;

}

}

//将姓名和作业网址用txt存放于bin目录下

private void button1_Click(object sender, EventArgs e)

{

//此处的文本文件在工程下Bin的程序集目录下

stFilePath = Application.StartupPath.Trim() + "//ex03_demo" + ".txt";

StreamWriter swStream;

if (File.Exists(stFilePath))

{

swStream = new StreamWriter(stFilePath);

}

else

{

swStream = File.CreateText(stFilePath);

}

for (int i = 0; i < listView1.Items.Count; i++)

{

for (int j = 4; j <= 6; j += 2)

{

string temp = listView1.Items[i].SubItems[j].Text;

swStream.Write(temp);

//插入------分隔符

swStream.Write("--------");

}

swStream.WriteLine();

}

//关闭流，释放资源

swStream.Flush();

swStream.Close();

MessageBox.Show("已成功保存在bin目录下");

}

public static DataTable ExcelToDataTable(string strExcelFileName, string strSheetName)

{

//源的定义

string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + strExcelFileName + ";" + "Extended Properties='Excel 8.0;HDR=NO;IMEX=1';";

//Sql语句

//string strExcel = string.Format("select * from [{0}$]", strSheetName); 这是一种方法

string strExcel = "select * from [sheet1$]";

//定义存放的数据表

DataSet ds = new DataSet();

//连接数据源

OleDbConnection conn = new OleDbConnection(strConn);

conn.Open();

//适配到数据源

OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn);

adapter.Fill(ds, strSheetName);

conn.Close();

return ds.Tables[strSheetName];

}

}

}