C#第三次作业

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1. 目标1：用C#读取Excle文件内容  

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1. //代码实现  
2. using System;  
3. using System.Collections.Generic;  
4. using System.ComponentModel;  
5. using System.Data;  
6. using System.Data.OleDb;  
7. using System.Drawing;  
8. using System.Linq;  
9. using System.Text;  
10. using System.Threading.Tasks;  
11. using System.Windows.Forms;  
12.   
13. namespace WRExc  
14. {  
15.     public partial class form1 : Form  
16.     {  
17.         public form1()  
18.         {  
19.             InitializeComponent();  
20.         }  
21.   
22.         private void Form1_Load(object sender, EventArgs e)  
23.         {  
24.   
25.         }  
26.    
27.         private void button1_Click(object sender, EventArgs e)  
28.         {  
29.             OpenFileDialog openfile = new OpenFileDialog();  
30.             openfile.Filter = "工作薄(*.xls)|*.xls|所有文件(*.*)|*.*";  //用Filter属性设置文件格式  
31.             //点击“打开”窗体显示文件内容  
32.             if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK)    
33.             dataset1(openfile.FileName);     //使用dataset组件  
34.   
35.         }  
36.   
37.         private void openFileDialog1_FileOk(object sender, CancelEventArgs e)  
38.         {  
39.   
40.         }  
41.         public DataSet dataset1(string path)   //文件路径设置  
42.         {  
43.   
44.   
45.             string strConn = "ProviderMICROSOFT.Jet.OLEDB.4.0;" + "Data Source=" + @path + ";" + "Extended Properties=Excel 8.0;";  
46.             OleDbConnection conn = new OleDbConnection(strConn);  
47.             conn.Open();  
48.             string strExcel = "";  
49.             OleDbDataAdapter myCommand = null;  
50.             DataSet ds = null;  
51.             strExcel = "select * from [sheet1$]";     //SQL语句选择表内容  
52.             myCommand = new OleDbDataAdapter(strExcel, strConn);    //调用OleDbDataAdapter（）方法复制给myCommand  
53.             DataTable table1 = new DataTable();  
54.             ds = new DataSet();  
55.             myCommand.Fill(table1);  
56.             dataGridView1.DataSource = table1;  
57.             return ds;  
58.   
59.         }   
60.     }  
61. }  

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1. 演示结果：  

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1. 1窗体界面  

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

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1. 2点击打开后续  

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1. <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="" />  

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1. 3选择事例文件后窗体显示结果  

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

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1. 完成目标要求，这次程序主要难点在于怎么读取Excle