winform项目导入数据

 1  private void button1_Click(object sender, EventArgs e)
 2         {
 3             OpenFileDialog ofd = new OpenFileDialog();
 4             ofd.Title = "选择文件";
 5             ofd.Filter = "Microsoft Excel文件|*.xls;*.xlsx";
 6             ofd.FilterIndex = 1;
 7             ofd.DefaultExt = "xls";
 8             if (ofd.ShowDialog() == DialogResult.OK)
 9             {
10                 if (!ofd.SafeFileName.EndsWith(".xls") && !ofd.SafeFileName.EndsWith(".xlsx"))
11                 {
12                     XtraMessageBox.Show("请选择Excel文件","文件解析失败!",MessageBoxButtons.OK,MessageBoxIcon.Error);
13                     return;
14                 }
15                 if (!ofd.CheckFileExists)
16                 {
17                     XtraMessageBox.Show("指定的文件不存在","请检查！",MessageBoxButtons.OK,MessageBoxIcon.Error);
18                     return;
19                 }
20                 //DataTable dt = NpoiOperExcel.ExcelToDataTable(ofd.FileName,true);
21                 DataSet ds = NpoiOperExcel.DsExcel(ofd.FileName);
22             }
23         }

 1 public static DataSet DsExcel(string filePath)
 2         {
 3             string str = "Provider = Microsoft.Jet.OLEDB.4.0; Data Source = " + filePath + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";//智能读取2003版本
 4             OleDbConnection con = new OleDbConnection(str);
 5             try
 6             {
 7                 con.Open(); 
 8                 DataTable dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
 9                 string tablename = "", sql = "";
10                 w_import_select_table wi = new w_import_select_table();//创建的一个窗体，用于选择工作表格
11                 wi.dt = dt;
12                 if (wi.ShowDialog() != DialogResult.Yes)
13                 {
14                     return null;
15                 }
16                 tablename = wi.listBox1.Text.Trim();
17                 sql = "select * from [" + tablename + "]";
18                 OleDbDataAdapter da = new OleDbDataAdapter(sql, con);
19                 DataSet ds = new DataSet();
20                 da.Fill(ds, tablename);
21                 return ds;
22             }
23             catch (Exception ex)
24             {
25                 XtraMessageBox.Show(ex.ToString());
26                 return null;
27             }
28             finally
29             {
30                 if (con.State == ConnectionState.Open)
31                 {
32                     con.Close();
33                 }
34             }
35         }