【c#第三次作业】打开excel，并保存于sql中

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:/c#/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;
}
}

//存入数据库
private void button2_Click(object sender, EventArgs e)
{
//建立数据库连接
String con = "server=(local);database=c#;Trusted_Connection=SSPI";
SqlConnection conn=new SqlConnection(con);

//定义对象
StringBuilder strsql = new StringBuilder();
conn.Open(); //打开数据库
//定义插入值
for (int i = 0; i < listView1.Items.Count; i++) {
strsql.Append("insert into em03_demo(班级,学号,姓名,作业网址)");
strsql.Append("values(");
strsql.Append("'" + listView1.Items[i].SubItems[2].Text + "',");//插入班级列
strsql.Append("'" + listView1.Items[i].SubItems[3].Text + "',");//学号列
strsql.Append("'" + listView1.Items[i].SubItems[4].Text + "',");//姓名列
strsql.Append("'" + listView1.Items[i].SubItems[6].Text + "')");//作业网址列

using (SqlCommand cmd = new SqlCommand(strsql.ToString(), conn)) //定义连接命令
{
//cmd.CommandType = CommandType.StoredProcedure;
cmd.ExecuteNonQuery();//执行sql语句
}

strsql.Clear();

}
conn.Close(); //关闭数据库
conn.Dispose(); //释放内存空
MessageBox.Show("已存入数据库");
}

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];
}
}
}