C# DataTable.Copy方法代碼示例

        private void InitialOriginTable(DataTable dt)
        {
            originalTable = dt.Copy();

            originalTable.Columns.Add("PassengerName");
            originalTable.Columns["PassengerName"].SetOrdinal(0);

            originalTable.Columns.Add("FlightInfo");
            originalTable.Columns["FlightInfo"].SetOrdinal(1);

            originalTable.Columns.Add("StaffName");
            //originalTable.Columns["StaffName"].SetOrdinal(2);

            foreach (DataRow row in originalTable.Rows)
            {
                Guid passengerID = Guid.Parse(row["PassengerID"].ToString());
                Passenger passenger = reservationSystem.GetPassengerByID(passengerID);
                string passengerName = passenger.firstName + " " + passenger.lastName;
                row["PassengerName"] = passengerName;

                Guid staffID = Guid.Parse(row["StaffID"].ToString());
                Staff staff = reservationSystem.GetStaffByID(staffID);
                string staffName = staff.firstName + " " + staff.lastName;
                row["StaffName"] = staffName;

                Guid flightID = Guid.Parse(row["FlightID"].ToString());
                Flight flight = reservationSystem.GetFlightByID(flightID);
                string flightInfo = flight.origin.name + " - " + flight.destination.name;
                row["FlightInfo"] = flightInfo;
            }
        }

        /// <summary>
        /// Sorts the <see cref="System.Data.DataTable"/>.
        /// </summary>
        /// <param name="sourceTable">The source table.</param>
        /// <param name="sortColumn">The column to sort by.</param>
        /// <param name="order">The <see cref="Tools.Common.SortOrder"/>.</param>
        /// <param name="copyIfNoSort">Should only be true when one table owner is assumed
        /// other time and space.</param>
        /// <returns></returns>
        public static DataTable SortDataTable(DataTable sourceTable, string sortColumn, SortOrder order, bool copyIfNoSort)
        {
            if (String.IsNullOrEmpty(sortColumn))
            {
                // copyIfNoSort make the semantic more stable, even if there is no sort required
                // the copy is returned, so the caller may assume same level of independence.
                if (copyIfNoSort) return sourceTable.Copy();
                return sourceTable;
            }

            DataTable targetTable = sourceTable.Clone();

            DataRow[] sourceRows = sourceTable.Select(null, 
                ("[" + sortColumn + "] " + order.ToString()).TrimEnd(' '));

            for (int i = 0; i < sourceRows.Length; i++)
            {
                DataRow newRow = targetTable.NewRow();

                newRow.ItemArray = sourceRows[i].ItemArray;

                targetTable.Rows.Add(newRow);
            }
            return targetTable;
        }

        public DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)
        {
            if (PageIndex == 0)
                return dt;
            DataTable newdt = dt.Copy();
            newdt.Clear();

            int rowbegin = (PageIndex - 1) * PageSize;
            int rowend = PageIndex * PageSize;

            if (rowbegin >= dt.Rows.Count)
                return newdt;

            if (rowend > dt.Rows.Count)
                rowend = dt.Rows.Count;
            for (int i = rowbegin; i <= rowend - 1; i++)
            {
                DataRow newdr = newdt.NewRow();
                DataRow dr = dt.Rows[i];
                foreach (DataColumn column in dt.Columns)
                {
                    newdr[column.ColumnName] = dr[column.ColumnName];
                }
                newdt.Rows.Add(newdr);
            }

            return newdt;
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            GridView grid = new GridView();
            DataTable dt = new DataTable();
            List<Terceiro> lista = new List<Terceiro>();
            TerceiroBL tbl = new TerceiroBL();
            lista = tbl.buscaTerceiros(Convert.ToInt16(Session["empresa"].ToString()));

            DataColumn c1 = new DataColumn("Cnpj", Type.GetType("System.String"));
            DataColumn c2 = new DataColumn("Nome", Type.GetType("System.String"));
            DataColumn c3 = new DataColumn("Email", Type.GetType("System.String"));
            DataColumn c4 = new DataColumn("Telefone", Type.GetType("System.String"));
            DataColumn c5 = new DataColumn("editar", Type.GetType("System.String"));

            dt.Columns.Add(c1);
            dt.Columns.Add(c2);
            dt.Columns.Add(c3);
            dt.Columns.Add(c4);
            dt.Columns.Add(c5);

            foreach (Terceiro t in lista)
            {
                DataRow dr = dt.NewRow();
                dr["Cnpj"] = t.cpfCnpj.ToString();
                dr["Nome"] = t.nome.ToString();
                dr["Email"] = t.email.ToString();
                dr["Telefone"] = t.telefone.ToString();
                dr["editar"] = "~/EditaTerceiro.aspx?id_terceiro=" + t.id.ToString();
                dt.Rows.Add(dr);
            }
            gridTerceiros.DataSource = dt.Copy();
            gridTerceiros.DataBind();
        }

 /// <summary>
 /// Saves a copy of the ProxyTable in the application settings
 /// </summary>
 /// <param name="proxyTable">DataTable to save</param>
 public static void saveConfig(DataTable proxyTable)
 {
     DataTable copyTable = proxyTable.Copy();
     SwitchProxy.Properties.Settings.Default.ProxyTable = null;
     SwitchProxy.Properties.Settings.Default.ProxyTable = copyTable;
     SwitchProxy.Properties.Settings.Default.Save();
 }

 //////////////////////////////////////////MySQL
 public void NW_Dhcp_Customer_Getlist_MySQL()
 {
     string sql = "Select * from NW_Dhcp_Customer";
     dt = Class.MySqlConnect.ExecQuery(sql);
     gridItem.DataSource = dt;
     dtIpPublic = dt.Copy();
 }

        public void SerializePart( DataTable data )
        {
            // TODO: ТОЛЬКО ДЛЯ ТЕСТИРОВАНИЯ. УБРАТЬ!
            // data.TableName += Guid.NewGuid().ToString();

            ResultDataSet.Tables.Add( data.Copy() );
        }

 public static DataTable getTopCategoryTotals(DataTable inputTable, int topRowsCount)
 {
     DataTable table = inputTable.Copy();
     table.Clear();
     double otherTotal = 0;
     try
     {
         for (int i = 0; i < inputTable.Rows.Count; i++)
         {
             if (i > topRowsCount - 1)
             {
                 otherTotal = otherTotal + double.Parse(inputTable.Rows[i]["total"].ToString());
             }
             else
             {
                 table.Rows.Add(inputTable.Rows[i][0], inputTable.Rows[i][1]);
             }
         }
         if (inputTable.Rows.Count>5)
         {
             table.Rows.Add("Other", otherTotal);
         }
     }
     catch (Exception exception)
     {
         Logger.LogException(exception);
         Helper.showMessage("Unable to trim top category totals from database. \n\n " + exception.ToString());
     }
     return table;
 }

 private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
 {
     if (dataGridView1.Columns[e.ColumnIndex].Name  == "exe")
     {//打開文件
        openFileDialog1.ShowDialog();
        dataGridView1.CurrentCell.Value = openFileDialog1.FileName;
     }
     else if (dataGridView1.Columns[e.ColumnIndex].Name == "ok")
     {//保存文件
         DataTable _dt = new DataTable();
         _dt.Columns.Add("exe");
         _dt.Columns.Add("message");
         _dt.Columns.Add("rule");
         foreach (DataGridViewRow var in dataGridView1.Rows)
         {
             if (var.Cells[1].Value == null)
             {
                 continue;
             }
             _dt.Rows.Add(var.Cells["exe"].Value.ToString(), var.Cells["message"].Value.ToString() == null ? "*" : var.Cells["message"].Value.ToString(), var.Cells["rule"].Value.ToString() == null ? "1" : var.Cells["rule"].Value.ToString());
         }
         DataSet _ds = new DataSet();
         _ds.Tables.Add(_dt.Copy());
         SaveData(_ds);
     }
 }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="tbl"></param>
        public void AddGRAlarm(DataTable tbl)
        {
            DataTable s = this.dataGridView1.DataSource as DataTable;
            if (s == null)
            {
                s = tbl.Copy();
                this.dataGridView1.DataSource = s;
            }
            else
            {
                s.Merge(tbl);
            }

            if (dataGridView1.Rows.Count > 0)
            {
                // remove records
                //
                if (dataGridView1.Rows.Count > Config.Default.GRAlarmMaxCount)
                {
                    int n = dataGridView1.Rows.Count - Config.Default.GRAlarmMaxCount;
                    for (int i = 0; i < n; i++)
                    {
                        dataGridView1.Rows.RemoveAt(0);
                        //s.Rows[0].Delete();
                    }
                }

                // move to last record
                //
                DataGridViewCell lastCell = this.dataGridView1[0, this.dataGridView1.Rows.Count - 1];
                this.dataGridView1.CurrentCell = lastCell;
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            GridView grid = new GridView();
            DataTable dt = new DataTable();
            List<Usuario> lista = new List<Usuario>();
            UsuarioBL uBL = new UsuarioBL();
            lista = uBL.buscaUsuariosEmpresa(Convert.ToInt16(Session["empresa"].ToString()));

            DataColumn c1 = new DataColumn("Email", Type.GetType("System.String"));
            DataColumn c2 = new DataColumn("Nome", Type.GetType("System.String"));
            DataColumn c3 = new DataColumn("Empresa", Type.GetType("System.String"));
            DataColumn c4 = new DataColumn("Licença", Type.GetType("System.String"));
            DataColumn c5 = new DataColumn("editar", Type.GetType("System.String"));

            dt.Columns.Add(c1);
            dt.Columns.Add(c2);
            dt.Columns.Add(c3);
            dt.Columns.Add(c4);
            dt.Columns.Add(c5);

            foreach (Usuario u in lista)
            {
                DataRow dr = dt.NewRow();
                dr["Email"] = u.email.ToString();
                dr["Nome"] = u.nome.ToString();
                dr["Empresa"] = u.idEmpresa.ToString();
                dr["Licença"] = u.dataFimLicenca.ToShortDateString();
                dr["editar"] = "~/EditarUsuario.aspx?user_mail=" + u.email.ToString();
                dt.Rows.Add(dr);
            }
            gridUsuarios.DataSource = dt.Copy();
            gridUsuarios.DataBind();
        }

        public void alimentagrid()
        {
            GridView grid = new GridView();
            DataTable dt = new DataTable();
            List<Etapa> lista = new List<Etapa>();
            EtapaBL ebl = new EtapaBL();

            lista = ebl.buscaEtapas();

            DataColumn c1 = new DataColumn("id", Type.GetType("System.String"));
            DataColumn c2 = new DataColumn("nome", Type.GetType("System.String"));
            DataColumn c3 = new DataColumn("editar", Type.GetType("System.String"));

            dt.Columns.Add(c1);
            dt.Columns.Add(c2);
            dt.Columns.Add(c3);

            foreach (Etapa e in lista)
            {
                DataRow dr = dt.NewRow();
                dr["id"] = e.id.ToString();
                dr["nome"] = e.tituloEtapa.ToString();
                dr["editar"] = "~/EditaEtapa.aspx?id_etapa=" + e.id.ToString();
                dt.Rows.Add(dr);
            }
            griEtapas.DataSource = dt.Copy();
            griEtapas.DataBind();
        }

        public void carregaTabela()
        {
            GridView grid = new GridView();
            DataTable dt = new DataTable();
            List<ItemTarefa> lista = new List<ItemTarefa>();
            TarefaBL tbl = new TarefaBL();
            lista = tbl.buscaItensTarefa(idTarefa);
            DataColumn c1 = new DataColumn("data", Type.GetType("System.String"));
            DataColumn c2 = new DataColumn("descricao", Type.GetType("System.String"));
            DataColumn c3 = new DataColumn("excluir", Type.GetType("System.String"));
            dt.Columns.Add(c1);
            dt.Columns.Add(c2);
            dt.Columns.Add(c3);

            foreach (ItemTarefa t in lista)
            {
                EtapaBL ebl = new EtapaBL();
                DataRow dr = dt.NewRow();
                dr["data"] = t.data.ToString();
                dr["descricao"] = t.descricao.ToString();
                dr["excluir"] = "ExcluirItemTarefa.aspx?id_item=" + t.id.ToString();
                dt.Rows.Add(dr);
            }
            gridItens.DataSource = dt.Copy();
            gridItens.DataBind();
        }

        /// <summary>
        /// 取得 VDS_CRM_ORDER_MAIN && VDS_CRM_ORDER_DETL 的 Data
        /// </summary>
        /// <param name="ParameterList"></param>
        /// <returns>回傳查詢結果</returns>
        public DataSet QUERY_CRM041_MAIN_AND_DETL(ArrayList ParameterList)
        {
            try
            {
                DataSet ds_Return = new DataSet();
                DataTable dt_Return_Main = new DataTable();
                DataTable dt_Return_Detl = new DataTable();

                DBO.VDS_CRM_ORDER_MAINDBO VCOM = new VDS_CRM_ORDER_MAINDBO(ref USEDB);
                DBO.VDS_CRM_ORDER_DETLDBO VCOD = new VDS_CRM_ORDER_DETLDBO(ref USEDB);

                dt_Return_Main = VCOM.QUERY_CRM041_MAIN(ParameterList);
                dt_Return_Main.TableName = "VDS_CRM_ORDER_MAIN";

                dt_Return_Detl = VCOD.QUERY_CRM041_DETL(ParameterList);
                dt_Return_Detl.TableName = "VDS_CRM_ORDER_DETL";

                ds_Return.Tables.Add(dt_Return_Main.Copy());
                ds_Return.Tables.Add(dt_Return_Detl.Copy());

                dt_Return_Main.Clear();
                dt_Return_Detl.Clear();
                dt_Return_Main.Dispose();
                dt_Return_Detl.Dispose();

                return ds_Return;

            }
            catch (Exception ex)
            { throw GetNewException(ex); }
        }

 public DataTable ConvertEMeterTransaction(DataTable _dt, int adcID)
 {
     DataTable dt = _dt.Copy();
     //
     string sID = "device_adc_id";
     string sDate = "e_datetime";
     //
     if (!dt.Columns.Contains(sID))
         dt.Columns.Add(new DataColumn(sID, typeof(int), "'" + adcID + "'"));
     //
     if (!dt.Columns.Contains(sDate))
         dt.Columns.Add(new DataColumn(sDate, typeof(DateTime),
             "Convert(E_Date + ' ' + E_Time, 'System.DateTime')"));
     //
     string sConnection = "e_connection";
     if (!dt.Columns.Contains(sConnection))
         dt.Columns.Add(new DataColumn(sConnection, typeof(int),
             "Convert(IIF(E_CommStatus like '%complete',1,0), 'System.Int16')"));
     //
     foreach (DataRow r in dt.Rows)
     {
         foreach(DataColumn c in dt.Columns)
             if(r[c.ColumnName].ToString().Contains("null"))
                 r[c.ColumnName] = "0";
     }
     dt.AcceptChanges();
     //
     return dt;
 }