最近在做这个如何把excel导入到数据库中，经过多方查找，终于找到一个适合的，并且经过自己的完善可以正常使用（忘记原作者博客的链接地址了，敬请见谅）

1. 首先是窗体的创建，文本框显示文件的路径，按钮执行操作，DataGridView显示导入的信息
2. 

3. 代码如下：可根据自己的需求进行修改，我是要导入之后就对我的另一窗体进行刷新，定义了委托，你们可以忽略。

           //定义委托
           public delegate void Refresh();
   
           //定义事件
           public event Refresh myRefresh;
           public ExcelRoprtForm()
           {
               InitializeComponent();
           }
   
           private void button1_Click(object sender, EventArgs e)
           {
               //选中导入的文件
               try
               {
                   //openFileDialog1.Filter = "Excel 文件|*.xls";//指定存放文件格式类型
                   OpenFileDialog fd = new OpenFileDialog();
                   fd.Filter = "Excel文件(*.xls,xlsx)|*.xls;*.xlsx";
                   if (fd.ShowDialog() == DialogResult.OK)
                   {
                       string fileName = fd.FileName.ToString();
                       this.textBox1.Text = fileName;
                   }
   
               }
               catch (Exception ee)
               {
                   MessageBox.Show("打开文件出错！" + ee.Message.ToString());
               }
           }
   
           private DataSet xsldata(string filepath)
           {
               string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;IMEX=1'";
   
               //string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source= " + filepath + ";Extended Properties='Excel 12.0; HDR=Yes; IMEX=1'";
   
               System.Data.OleDb.OleDbConnection Conn = new System.Data.OleDb.OleDbConnection(strCon);
   
               string strCom = "SELECT * FROM [Sheet1$]";
   
               Conn.Open();
   
               System.Data.OleDb.OleDbDataAdapter myCommand = new System.Data.OleDb.OleDbDataAdapter(strCom, Conn);
   
               DataSet ds = new DataSet();
   
               myCommand.Fill(ds, "[Sheet1$]");
               dataGridView1.DataSource = ds.Tables[0];
               Conn.Close();
               return ds;
           }
           private void button2_Click(object sender, EventArgs e)
           {
               if (textBox1.Text == "")
               {
                   MessageBox.Show("请选择要导入的Excel文档！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                   return;
               }
               string filepath = textBox1.Text;
               string strcon1 = ConfigurationManager.ConnectionStrings["connString"].ToString();
               SqlConnection conn = new SqlConnection(strcon1);//链接数据库
               conn.Open();
               try
               {
                   DataSet ds = new DataSet();
                   //取得数据集
                   //调用上面的函数
                   ds = xsldata(filepath);
                   int errorcount = 0;//记录错误信息条数
   
                   int insertcount = 0;//记录插入成功条数
   
                   int updatecount = 0;//记录更新信息条数
   
                   for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                   {
                       string carnumber = ds.Tables[0].Rows[i][0].ToString();
                       int carstatus = Convert.ToInt32(ds.Tables[0].Rows[i][1].ToString());
                       int cartype = Convert.ToInt32(ds.Tables[0].Rows[i][2].ToString());
                       string carbrand = ds.Tables[0].Rows[i][3].ToString();
   
                       if (carnumber != "" && carstatus != 0 && cartype != 0)
                       {
                           SqlCommand selectcmd = new SqlCommand("select count(*) from CarInfo where CarNumber='" + carnumber + "'", conn);
                           
                           int count = Convert.ToInt32(selectcmd.ExecuteScalar());
                           if (count > 0)
                           {
                               updatecount++;
                           }
                           else
                           {
                               SqlCommand insertcmd = new SqlCommand("insert into CarInfo(CarNumber,CarStatusID,CarTypeID,CarBrand) values(" + "'" + carnumber + "'," + carstatus + "," + cartype + ",'" + carbrand + "'" + ")", conn);
   
                               insertcmd.ExecuteNonQuery();
   
                               insertcount++;
   
                           }
                       }
                       else
                       {
                           //MessageBox.Show("电子表格信息有错！");
                           errorcount++;
                       }
                   }
                   myR