1.在base Class建
2.用interface

以你的需求建議是
class CreateFile { public string BankCode { get; set; } }

這樣應該可以達成你的需求。
public class CreateFile { public string XXX { get; set; } protected string BankCode { get; set; } public void PrintMyName() { Console.WriteLine("My BankCode: {0}", BankCode); } public string GetMyBankCode() { return BankCode; } } public class Bank1 : CreateFile { public Bank1() { BankCode = "Bank1"; } } public class Bank2 : CreateFile { public Bank2() { BankCode = "Bank2"; } } public class Bank3 : CreateFile { public Bank3() { BankCode = "Bank3"; } }
用法
var bank1 = new Bank1(); bank1.PrintMyName(); var bank2 = new Bank2(); bank2.PrintMyName(); var bank3 = new Bank3(); bank3.PrintMyName(); Console.WriteLine(bank1.GetMyBankCode()); Console.WriteLine(bank2.GetMyBankCode()); Console.WriteLine(bank3.GetMyBankCode());

回春天哥
這個方式我試過
可是請問接下來我要如何建立每個bank各有不同的代碼
然後在form1中用一個switch或if else來去判斷呢??

其實小弟本來已經可以直接判斷單一Bank且執行method

public class CreateFile
{
public string BankCode { get; set; }
==================================================

class Bank1 : CreateFile

new string BankCode = "01";
==================================================
form1中
Bank1 B1 = new Bank1();
B1.BankCode

switch (B1.BankCode)
{
case "01":
B1.CreateIn();
B1.CreateOut();
break;

但這樣就只能單一判斷Bank1而已
無法一次全部都判斷
switch(變數)不知道該怎麼寫
不然30幾個檔案
我就必須寫30幾個單一判斷

如果你30幾個Bank都有CreateIn()跟CreateOut()方法，何不使用interface?或是寫在CreateFile看是子類別用override還是CreateFile用abstract

春天哥
我知道可以這樣寫
可是因為createin跟createout這兩種方法的內容會有些不同
所以我才分開寫

現在在研究春天哥建議的interface與CHShen大的code中....

回CHShen大
請問您的方式到form中該怎麼寫判斷呢??
例如switch()<===中的變數應該帶入哪個??

namespace CardTestNew { public class CreateFile { public string BankCode { get; set; } //"所有欄位"在此定義屬性 public string TransType { get; set; } public string TradeType { get; set; } public string Bank { get; set; } public string CreditCard { get; set; } public string Price { get; set; }//Price public string TRDate = DateTime.Now.ToString();//直接取現在時間 public string TRTime = DateTime.Now.ToString(); public string Authentication { get; set; } public string ReturnCode { get; set; } public string TerminalID { get; set; } public string ReferenceNo { get; set; } public string TradeID { get; set; } public string MenberID { get; set; } public string card_type { get; set; } public string a1 { get; set; }//保留位置 public string a2 { get; set; }//保留位置 public string a3 { get; set; } public string a4 { get; set; } public string a5 { get; set; } } }



namespace CardTestNew { class Bank1 : CreateFile { new string BankCode = "01"; [color=Red] ****這樣寫編譯可以過, 但是form卻取不到值, 另外類推 Bank2="02" Bank3="03"也都是這樣寫, 所以其他就不上傳***** public string CreateIn() { String I = String.Format ("{0,2}{1,29}{2,12}{3,99}",<span style="color: Red;">這裡的引數對應的位置或值與長度會有所不同, 所以才分開寫</span> TransType, "", Price + 00, ""); FileStream Request = new FileStream (@"D:\CSharp刷卡檔實作\CardTestNew\in.dat", FileMode.Create); Request.Close(); using (StreamWriter sw = new StreamWriter (@"D:\CSharp刷卡檔實作\CardTestNew\in.dat")) { // 欲寫入的文字資料 ~ sw.Write(I); } return (I); } public string CreateOut() { string TradeType = Convert.ToString(02);//測試 FileStream Response = new FileStream (@"D:\CSharp刷卡檔實作\CardTestNew\out.dat", FileMode.Create); Response.Close(); //切記開了要關,不然會被佔用而無法修改喔!!! String O = String.Format ****這裡的引數對應的值與長度會有所不同, 所以才分開寫**** ("{0,2} {1,2} {2,6} {3,19} {4,4} {5,10} {6,6} {7,6} {8,9} {9,4} {10,8} {11,12} {12,18}", TradeType, Bank, a2, CreditCard, a4, Price + 0, TRDate = DateTime.Now.ToString("yy-MM-dd"),//取得格式數字 //TRDate.ToString("yy-MM-dd"), TRTime = DateTime.Now.ToString("hh-mm-ss"),//取得格式數字 //TRTime.ToString("hh-mm-ss"), Authentication, ReturnCode, TerminalID, ReferenceNo, TradeID); using (StreamWriter sr = new StreamWriter (@"D:\CSharp刷卡檔實作\CardTestNew\out.dat")) { // 欲寫入的文字資料 ~ sr.Write(O); } return (O); } } }

如上是CreateFile與Bank1的程式碼
Bank class都大同小異
只有***的部分會有不同且需要有分別是哪間Bank
所以才分開來寫

class BaseClass { protected string _BankCode { get; set; } protected string _TradeType { get; set; } protected string _A2 { get; set; } protected string _CreditCard { get; set; } protected string _A4 { get; set; } protected int _Price { get; set; } protected string _Authentication { get; set; } protected string _ReturnCode { get; set; } protected string _TerminalID { get; set; } protected string _ReferenceNo { get; set; } protected string _TradeID { get; set; } protected virtual string GetO() { return string.Empty; } public string CreateOut() { string TradeType = Convert.ToString(02);//測試 FileStream Response = new FileStream (@"D:\CSharp刷卡檔實作\CardTestNew\out.dat", FileMode.Create); Response.Close(); //切記開了要關,不然會被佔用而無法修改喔!!! string O = GetO(); using (StreamWriter sr = new StreamWriter (@"D:\CSharp刷卡檔實作\CardTestNew\out.dat")) { // 欲寫入的文字資料 ~ sr.Write(O); } return (O); } } class Bank1 : BaseClass { protected new string _BankCode = "01"; protected override string GetO() { return string.Format// ****這裡的引數對應的值與長度會有所不同, 所以才分開寫**** ("{0,2} {1,2} {2,6} {3,19} {4,4} {5,10} {6,6} {7,6} {8,9} {9,4} {10,8} {11,12} {12,18}", _TradeType, _BankCode, _A2, _CreditCard, _A4, _Price + 0, DateTime.Now.ToString("yy-MM-dd"),//取得格式數字 DateTime.Now.ToString("hh-mm-ss"),//取得格式數字 _Authentication, _ReturnCode, _TerminalID, _ReferenceNo, _TradeID); } }

你的分類已經出現問題了
Bank是代表銀行(名詞)，CreateFile是代表建檔的行為動作(動詞)


依你的情況，我猜想你的BankCode是必要指定的項目
資料的部份也可以獨立出來
沒有全面去看你的行為跟做法，初步分類如下

獨立出資料的部份
namespace CardTestNew { public class BankData { public string BankCode { get; set; } //"所有欄位"在此定義屬性 public string TransType { get; set; } public string TradeType { get; set; } public string Bank { get; set; } public string CreditCard { get; set; } public string Price { get; set; }//Price public string TRDate = DateTime.Now.ToString();//直接取現在時間 public string TRTime = DateTime.Now.ToString(); public string Authentication { get; set; } public string ReturnCode { get; set; } public string TerminalID { get; set; } public string ReferenceNo { get; set; } public string TradeID { get; set; } public string MenberID { get; set; } public string card_type { get; set; } public string a1 { get; set; }//保留位置 public string a2 { get; set; }//保留位置 public string a3 { get; set; } public string a4 { get; set; } public string a5 { get; set; } public BankData(string BankCode) { this.BankCode = BankCode; } } }

銀行的父類別
namespace CardTestNew { abstract class BaseBank { public BankData data; //銀行資料 public BaseBank(string BankCode) { this.data = new BankData(BankCode); } //繼承的銀行都必需要實作以下兩個Method public abstract string CreateIn(); public abstract string CreateOut(); protected string ProcessCreateIn(string I) { using (StreamWriter sw = new StreamWriter (@"D:\CSharp刷卡檔實作\CardTestNew\in.dat")) { // 欲寫入的文字資料 ~ sw.Write(I); } return (I); } protected string ProcessCreateOut(string O) { using (StreamWriter sr = new StreamWriter (@"D:\CSharp刷卡檔實作\CardTestNew\out.dat")) { // 欲寫入的文字資料 ~ sr.Write(O); } return (O); } } }

各銀行

namespace CardTestNew { class BankA : BaseBank { public BankA():base("ABC") //強製定義銀行代碼 { } public override string CreateIn() { String I = String.Format ("{0,2}{1,29}{2,12}{3,99}", this.data.TransType, "", this.data.Price + 00, ""); FileStream Request = new FileStream (@"D:\CSharp刷卡檔實作\CardTestNew\in.dat", FileMode.Create); Request.Close(); return ProcessCreateIn(I); } public override string CreateOut() { string TradeType = Convert.ToString(02);//測試 FileStream Response = new FileStream (@"D:\CSharp刷卡檔實作\CardTestNew\out.dat", FileMode.Create); Response.Close(); //切記開了要關,不然會被佔用而無法修改喔!!! String O = String.Format ("{0,2} {1,2} {2,6} {3,19} {4,4} {5,10} {6,6} {7,6} {8,9} {9,4} {10,8} {11,12} {12,18}", this.data.TradeType, this.data.Bank, this.data.a2, this.data.CreditCard, this.data.a4, this.data.Price + 0, this.data.TRDate = DateTime.Now.ToString("yy-MM-dd"),//取得格式數字 //TRDate.ToString("yy-MM-dd"), this.data.TRTime = DateTime.Now.ToString("hh-mm-ss"),//取得格式數字 //TRTime.ToString("hh-mm-ss"), this.data.Authentication, this.data.ReturnCode, this.data.TerminalID, this.data.ReferenceNo, this.data.TradeID); return ProcessCreateOut(O); } } }
實作

BankA a = new BankA(); a.CreateIn(); a.CreateOut();

另外
BaseClass可以加上public,這樣外部委派也可以拿來用
abstract class BaseBank //改 public abstract class BaseBank
實作
public partial class Form1 : Form { BankA a; BankA b; BankA c; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { BankA a = new BankA(); BankA b = new BankB(); BankA c = new BankC(); } private void button1_Click(object sender, EventArgs e) { CreateIn(a); } public string CreateIn(BaseBank b) { return b.CreateIn(); } }

春天哥
12萬分的感謝你
讓程式碼更簡潔 更好維護

我先試做一個Bank1
能夠正常建立檔案
最後小弟目前遇到的問題依舊仍無法解決
如下 :

private void button1_Click(object sender, EventArgs e) { Bank1 B1 = new Bank1(); switch(_BankCode)<-----在form1的button_click中讀不到這個變數, 顯示 名稱'_BankCode'不存在目前的內容中 { case "01": B1.CreateIn(); B1.CreateOut(); break; }

若無法取到變數的話
我再多Bank2 Bank3都沒辦法做判斷
或是我寫的方式有誤呢??

protected string _BankCode { get; set; }
改成
public string _BankCode { get; protected set; }

補充
加入BaseCode的判別實作
public partial class Form1 : Form { List<BaseBank> banks = new List<BaseBank>(); public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { BankA a = new BankA(); BankB b = new BankB(); BankC c = new BankC(); banks.Add(a); banks.Add(b); banks.Add(c); } private void button1_Click(object sender, EventArgs e) { CreateIn("ABC"); } public string CreateIn(string BankCode) { foreach (BaseBank b in banks) { if (b.data.BankCode == BankCode) { return b.CreateIn(); } } return ""; } }