C#操作读取excel数据

//点击按钮，获得excel数据放到一个dataset中

private void button1_Click(object sender, EventArgs e)

        {

            DataSet ds;

            if (openFileDialog1.ShowDialog() == DialogResult.OK)

            {

                textBox1.Text = openFileDialog1.FileName;

                ds = ImportExcel(this.openFileDialog1.FileName);//获得Excel  

                dataGridView1.DataSource = ds.Tables[0];

                DataTable dataTable = new DataTable();

                dataTable = ds.Tables[0];

                cell = 0;

                rowNum = 0;

                cell = dataTable.Columns.Count;

                rowNum = dataTable.Rows.Count;

            }

            else

            {

                return;

            }

        }

//读取excel中sheet1中的数据

        public DataSet ImportExcel (string file)

        {

            FileInfo fileInfo = new FileInfo(file);

            if (!fileInfo.Exists)

                return null;

            string strConn = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + file + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1'";

            OleDbConnection objConn = new OleDbConnection(strConn);

            DataSet dsExcel = new DataSet();

            try

            {

                objConn.Open();

                string strSql = "select * from  [Sheet1$]";

                OleDbDataAdapter odbcExcelDataAdapter = new OleDbDataAdapter(strSql, objConn);

                odbcExcelDataAdapter.Fill(dsExcel);

                return dsExcel;

            }

            catch (Exception ex)

            {

                throw ex;

            }  

        }