C#中导入Excel表数据到DataSet中

 今天分享一下，C#里怎么把Excel数据导入道DataSet然后进行处理。

                OpenFileDialog ofd = new OpenFileDialog();
                ofd.Title = "打开";
                ofd.Filter = "xlsx文件|*.xlsx|xls文件|*.xls|xlsm文件|*.xlsm";  //这里来筛选能打开的文件类型
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    string connection = "Provider = Microsoft.Ace.OleDb.12.0 ; Data Source = " + ofd.FileName + ";Extended Properties=Excel 12.0";
                    OleDbConnection thisconnection = new OleDbConnection(connection);
                    string command = "select * from [sheet1$]";    //我这里是查询Excel里的sheet1表格数据
                    thisconnection.Open();
                    OleDbDataAdapter adapter = new OleDbDataAdapter(command, thisconnection);
                    DataSet ds = new DataSet();
                    adapter.Fill(ds, "[sheet1$]");    //把读取出来的表格数据赋给DataSet
                    thisconnection.Close();
                    if (ds.Tables[0].Rows.Count < 1)
                    {
                        MessageBox.Show("表中无数据");
                        return;
                    }
                    else
                    {
                        for (int j = 0; j < ds.Tables[0].Rows.Count; j++)
                        {
                            //这里你就可以进行对读出来的Excel数据进行相应的处理
                        }
                    }
                }