第三次作业——用C#读取Excle文件

目标1：用C#读取Excle文件内容

//代码实现
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WRExc
{
public partial class form1 : Form
{
public form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog openfile = new OpenFileDialog();
openfile.Filter = "工作薄(*.xls)|*.xls|所有文件(*.*)|*.*";  //用Filter属性设置文件格式
//点击“打开”窗体显示文件内容
if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK)
dataset1(openfile.FileName);     //使用dataset组件

}

private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
{

}
public DataSet dataset1(string path)   //文件路径设置
{

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 * from [sheet1$]";     //SQL语句选择表内容
myCommand = new OleDbDataAdapter(strExcel, strConn);    //调用OleDbDataAdapter（）方法复制给myCommand
DataTable table1 = new DataTable();
ds = new DataSet();
myCommand.Fill(table1);
dataGridView1.DataSource = table1;
return ds;

}
}
}

演示结果：

1窗体界面

<img src="http://img.blog.csdn.net/20150508211622979?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvcHkxOTk0ODI5/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

2点击打开后续

<img width="677" height="475" style="width: 549px; height: 290px;" src="http://img.blog.csdn.net/20150508211653929?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvcHkxOTk0ODI5/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

3选择事例文件后窗体显示结果

<img src="http://img.blog.csdn.net/20150508211604630?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvcHkxOTk0ODI5/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

完成目标要求，这次程序主要难点在于怎么读取Excle文件后显示出来，参考案例后最终还是完成作业。